SmogRank / Episodes / Japan

Japan and South Korea, April 2024

For 6 days, from 16 to 21 April 2024, 499 cities in Japan and South Korea had PM2.5 at least twice their usual for the time of year. The worst reading was Gyeongju, Gyeongsangbuk-do, South Korea: 93.2 µg/m³ on 18 April, about 7.6× its usual 12.2.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached499in 2 countries
Days616 to 21 April 2024
Worst day18 April435 cities counted
Furthest above usual8.0×Tsushima

Day by day

18 April 435 cities at twice their usual or more
AkiNankokuInoSusakiShinagawaNakamuraYaeYanaiShingūYonagoYasugichōTsukumiuraOwaseMieNobeokaHyūgaShintomiMiyazakiKaizuNichinanIbiHekinanKariyaNishioKobayashiAnjōKakamigaharaNisshinInuyamaToyotaSetoMinokamoTajimiShinshiroHamamatsuGeroHamakitaTakayamaKakegawaKikugawaIidaShimadaFujiedaInaShizuokaOkayaSuwaFujinomiyaMinami-AlpsFujiKofuShimodaNumazuFujiyoshidaIzunokuniSusonoSakuNaganoŌtsukiMinamiashigaraOdawaraHadanoHiratsukaChigasakiAtsugiEbinaAiharaŌmeHachiōjiFujisawaMachidaAkishimaKamakuraOgawamachiFuchūHigashimurayamaKodairaTokorozawaYokosukaNoboritoKurihamaHigashikurumeKawagoeTateyamaŌtaAshikagaKimitsuKisarazuSodegauraKogaIchiharaTochigiJōsōYotsukaidōImaichiTorideMobaraŌharaŌamiTōganeBeolgyoSōsaHokotaChoshiJeongeupNajuBuanMuanSeonghwanGunsanAsanGwangjuHwacheonWabuNamyangjuSuwonHongseongHwaseong-siTangjinAnsan-siUijeongbu-siSeosanIncheonTaesal-liGimpo-siGanghwa-gunOkinawaNahaHirosakiKamaishiAomoriKujiHachinoheBoryeongSejongHanamIksanKimjeGoyang-siMokpoWanjuCheorwonMunsanHwasunBoseongGwangmyeongSeongnam-siAnseongBucheon-siYangguYangp'yŏngTanbaSinanAnyang-siChuncheonGuri-siMasanOsanPyeongtaekBeppuGwangjuNamsaNonsanYesanYeojuPubalBuyeoSangjuSeoulDaejeonKanoyaTakanabeJōetsuTsuchiuraYeongamChangnyeongYŏnmuCheonanJeonjuGimcheonKwangyangMiyakonojōMatsuyamaMinawaHadongHwadoJangseongHaenamKoesanNangenWŏnjuKumanoTōkaiMizuhoAyaseKamisuNagaiMinamirinkanOnomichiTakasakiYamaguchiGwangyangJeju CityChungjuImsilKoch'angGumiKinzanSuncheonWaegwanYangjuGapyeongMinamikyushuYamanashiKirishimaChikuseiHitaIgusaKoshigayaMaizuruŌitaSakadoShibukawaSōkaTomiokaYokotaYeosuGaigeturiJangheungChinch'ŏnJungpyongGongjuYeongdongTagawaKunisakiKamagayaAmaChikugoHigashi-MatsuyamaGifuHandaKameda-honchōKawaguchiKiryūKumagayaKurumeNagoyaNodaShimo-tsumaShin’ichiTottori-shiYokohamaKuwanaHwawŏnChinjuCheongju-siIcheon-siYufuAtamiChiryūUsukiKaminomaYamatoAzaminoSaitamaInabeBandōChibaAsakaSayamaChichibuGyōdaHannōHanyūKōnosuMatsudoOnodaShimaTakaokaTsurusakiUrayasuOwariasahiTaharaTokonameSeogwipoKunwiKuryeKochiOkazakiUnnanIrumaImizuNakaAgeoKodamachō-kodamaminamiMorohongōNagahamaNiihamaNyūzenTokyoYoriiKosaiFukuroiChangsuJinan-gunOkcheonDaeguYeongjuNeietsuMiuraShūnanNarashinoHigashihiroshimaOgaNiizaInashikiSakuraUwajimaKariyaHōfuIchinomiyaItoigawaIwakuniKashiwaKasukabeKazoKurayoshiMatsueMatsumotoNishiwakiSakai-nakajimaSakaiminatoTatebayashiJumunjinKagoshimaNōgataShikokuchūōMatsusakaMisato, SaitamaYokoshibaSaijōKashima-shiMenumaNagaokaNiigataOyamaSakataShidoShironeTanabeTanushimarumachi-toyokiUozuIwataHongch’ŏnKyōtangoShirakawaMineHigashigōYachiyoGotembaHonjōIkedachōMiyoshiTokiAndongMungyeongYawatahamaInzaiTonamiNoshiroYachimataImabariHimimachiHiroshimaKasaokaKukichūōNakanojōŌdachō-ōdaSanoToyookaMinamichitaSuzukaDamyangKogaGamagōriIizukaMinamiuonumaAizu-WakamatsuAkitaNaritaSagaeAioiŌmihachimanIseIzumiIzumoKan’onjichōKaseda-shirakameMarugameMatsutōŌmutaTakeoUbeYaitaTsuGeojeGyeongsan-siYecheonToyohashiYameŌdateAjikiFukushimaShinjōAyabeHikoneIsahayaKashiwaraMakiOkayamaSaikūTobaTosuYoukaichiNaesŏHayangMunakataKogaOgōriShonaiYurihonjōKagaChikumaHitachi-NakaOmigawaIyoKomatsuKudamatsuMiyazuShimonosekiTakamatsuUedaZentsujichóKaniMiryangGōtsuchōBizenIchinosekiMookaKitakyushuKureKushikinoSendaiHashimaUeno-ebisumachiGoseongMasudaNagoMimaBuzenNasushiobaraIshiokaMiyakoAnanFukuchiyamaNara-shiNumataŌmuraŌtakeTsubataYanagawaYeonggwangYokkaichiPohangHagiUkihaNasukarasuyamaIwakiHikariKashihara-shiNiitsu-honchōShibataTakeharaTsuruokaYukuhashiIgaSinhyeonChangwonUlsanHamadaItoshimaTomeTakizawaHiragiMinami-SōmaYamagataKamojimachō-jōgejimaKandaKanumaKashimaKitahamaNanaoSuzakaToyamaUtsunomiyaKōkaSandachōSekimachiSantyokuNagatoAsakuchiTakuKasugaHitachiomiyaKitaibarakiIkomaKanazawaKurashikiNiimiSagaSumotoTogitsuTsuyamaTakashimaTongyeongEisenYeonilOyabeYonezawaFukuokaKanzakimachi-kanzakiNakamaNarutochō-mitsuishiŌgakiUreshinomachi-shimojukuKameokaCheongsong gunDonghae CityAmamiWakasugiMitoWakuyaHakuiImarichō-kōKaratsuMiharaMotosuŌtsuT’aebaekYoshinogawaKesennumaFukuyamaHigashinozoeObitaSōjaTokushimaYawataYangsanGangneungKosongKuriharaHanamakiIshinomakiNamerikawaOnoKyotoKimhaeBusanHigashineKaminokawaMaebaru-chūōKusatsuTatsunoKakogawachō-honmachiSaikiTakinomiyaKizugawaNabariSokchoKinokawaIkarugaNonoichiNantanKōtariUjiKōriyamaYokoteTenriGijangIkiŌshūMoriokaGobōNagasakiTakahashiKameyamaSaikaiAridaMatsuuraSaseboHōryūjiHitachiIwadeTamanoJōyōHimejiTakarazukaUngsangSadoKainanMinatoAkashiSugaiGotōHashimotoNakatsuHigashimatsushimaShiroishiNishinomiyaToyonakaIwanumaAmagasakiTagajō-shiMatsushimaNatori-shiSendaiŌsakiKobeSōmaYoshiokaGyeongjuTsushima
13 Apr1415161718192021222324
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

Donghae CityDonghae City, 13 April: 26.1 µg/m³, 1.7× usualDonghae City, 14 April: 22.8 µg/m³, 1.5× usualDonghae City, 15 April: 20.4 µg/m³, 1.3× usualDonghae City, 16 April: 34.8 µg/m³, 2.2× usualDonghae City, 17 April: 69.3 µg/m³, 4.4× usualDonghae City, 18 April: 61.3 µg/m³, 3.9× usualDonghae City, 19 April: 35.8 µg/m³, 2.3× usualDonghae City, 20 April: 29.9 µg/m³, 1.9× usualDonghae City, 21 April: 20.9 µg/m³, 1.3× usualDonghae City, 22 April: 15.8 µg/m³, 1.0× usualDonghae City, 23 April: 13.5 µg/m³, 0.9× usualDonghae City, 24 April: 7.4 µg/m³, 0.5× usualSokchoSokcho, 13 April: 26.4 µg/m³, 1.9× usualSokcho, 14 April: 25.1 µg/m³, 1.8× usualSokcho, 15 April: 22.4 µg/m³, 1.6× usualSokcho, 16 April: 56.3 µg/m³, 4.1× usualSokcho, 17 April: 68.4 µg/m³, 4.9× usualSokcho, 18 April: 63.5 µg/m³, 4.6× usualSokcho, 19 April: 37.7 µg/m³, 2.7× usualSokcho, 20 April: 31.2 µg/m³, 2.2× usualSokcho, 21 April: 17.5 µg/m³, 1.3× usualSokcho, 22 April: 17.8 µg/m³, 1.3× usualSokcho, 23 April: 14.3 µg/m³, 1.0× usualSokcho, 24 April: 9.0 µg/m³, 0.6× usualGangneungGangneung, 13 April: 25.3 µg/m³, 1.9× usualGangneung, 14 April: 22.9 µg/m³, 1.7× usualGangneung, 15 April: 19.0 µg/m³, 1.4× usualGangneung, 16 April: 32.0 µg/m³, 2.4× usualGangneung, 17 April: 61.0 µg/m³, 4.6× usualGangneung, 18 April: 47.3 µg/m³, 3.6× usualGangneung, 19 April: 27.7 µg/m³, 2.1× usualGangneung, 20 April: 21.3 µg/m³, 1.6× usualGangneung, 21 April: 12.5 µg/m³, 0.9× usualGangneung, 22 April: 11.0 µg/m³, 0.8× usualGangneung, 23 April: 9.3 µg/m³, 0.7× usualGangneung, 24 April: 3.9 µg/m³, 0.3× usualGyeongjuGyeongju, 13 April: 15.8 µg/m³, 1.3× usualGyeongju, 14 April: 12.6 µg/m³, 1.0× usualGyeongju, 15 April: 11.7 µg/m³, 1.0× usualGyeongju, 16 April: 18.7 µg/m³, 1.5× usualGyeongju, 17 April: 69.6 µg/m³, 5.7× usualGyeongju, 18 April: 93.2 µg/m³, 7.6× usualGyeongju, 19 April: 57.5 µg/m³, 4.7× usualGyeongju, 20 April: 38.1 µg/m³, 3.1× usualGyeongju, 21 April: 12.6 µg/m³, 1.0× usualGyeongju, 22 April: 13.0 µg/m³, 1.1× usualGyeongju, 23 April: 9.5 µg/m³, 0.8× usualGyeongju, 24 April: 8.7 µg/m³, 0.7× usualGijangGijang, 13 April: 13.7 µg/m³, 1.0× usualGijang, 14 April: 13.8 µg/m³, 1.0× usualGijang, 15 April: 12.5 µg/m³, 0.9× usualGijang, 16 April: 19.8 µg/m³, 1.4× usualGijang, 17 April: 49.2 µg/m³, 3.4× usualGijang, 18 April: 73.1 µg/m³, 5.1× usualGijang, 19 April: 55.4 µg/m³, 3.8× usualGijang, 20 April: 31.0 µg/m³, 2.2× usualGijang, 21 April: 6.6 µg/m³, 0.5× usualGijang, 22 April: 13.2 µg/m³, 0.9× usualGijang, 23 April: 12.3 µg/m³, 0.9× usualGijang, 24 April: 10.4 µg/m³, 0.7× usualTsushimaTsushima, 13 April: 8.0 µg/m³, 0.9× usualTsushima, 14 April: 12.6 µg/m³, 1.4× usualTsushima, 15 April: 7.6 µg/m³, 0.8× usualTsushima, 16 April: 6.8 µg/m³, 0.7× usualTsushima, 17 April: 36.0 µg/m³, 4.0× usualTsushima, 18 April: 73.1 µg/m³, 8.0× usualTsushima, 19 April: 55.6 µg/m³, 6.1× usualTsushima, 20 April: 25.3 µg/m³, 2.8× usualTsushima, 21 April: 7.4 µg/m³, 0.8× usualTsushima, 22 April: 6.4 µg/m³, 0.7× usualTsushima, 23 April: 7.6 µg/m³, 0.8× usualTsushima, 24 April: 5.7 µg/m³, 0.6× usualBusanBusan, 13 April: 14.5 µg/m³, 1.0× usualBusan, 14 April: 14.7 µg/m³, 1.0× usualBusan, 15 April: 12.2 µg/m³, 0.8× usualBusan, 16 April: 19.8 µg/m³, 1.3× usualBusan, 17 April: 46.5 µg/m³, 3.1× usualBusan, 18 April: 69.4 µg/m³, 4.7× usualBusan, 19 April: 57.0 µg/m³, 3.8× usualBusan, 20 April: 27.7 µg/m³, 1.9× usualBusan, 21 April: 6.4 µg/m³, 0.4× usualBusan, 22 April: 13.4 µg/m³, 0.9× usualBusan, 23 April: 12.8 µg/m³, 0.9× usualBusan, 24 April: 9.8 µg/m³, 0.7× usualUngsangUngsang, 13 April: 12.7 µg/m³, 1.0× usualUngsang, 14 April: 10.1 µg/m³, 0.8× usualUngsang, 15 April: 9.2 µg/m³, 0.7× usualUngsang, 16 April: 16.8 µg/m³, 1.3× usualUngsang, 17 April: 52.5 µg/m³, 4.1× usualUngsang, 18 April: 69.3 µg/m³, 5.5× usualUngsang, 19 April: 43.8 µg/m³, 3.4× usualUngsang, 20 April: 25.9 µg/m³, 2.0× usualUngsang, 21 April: 5.1 µg/m³, 0.4× usualUngsang, 22 April: 13.3 µg/m³, 1.0× usualUngsang, 23 April: 10.3 µg/m³, 0.8× usualUngsang, 24 April: 11.2 µg/m³, 0.9× usualUlsanUlsan, 13 April: 19.9 µg/m³, 1.2× usualUlsan, 14 April: 18.1 µg/m³, 1.1× usualUlsan, 15 April: 13.8 µg/m³, 0.8× usualUlsan, 16 April: 17.8 µg/m³, 1.1× usualUlsan, 17 April: 48.6 µg/m³, 3.0× usualUlsan, 18 April: 67.1 µg/m³, 4.1× usualUlsan, 19 April: 53.4 µg/m³, 3.3× usualUlsan, 20 April: 33.2 µg/m³, 2.0× usualUlsan, 21 April: 7.6 µg/m³, 0.5× usualUlsan, 22 April: 11.4 µg/m³, 0.7× usualUlsan, 23 April: 9.4 µg/m³, 0.6× usualUlsan, 24 April: 14.2 µg/m³, 0.9× usualPohangPohang, 13 April: 22.8 µg/m³, 1.3× usualPohang, 14 April: 18.6 µg/m³, 1.1× usualPohang, 15 April: 15.6 µg/m³, 0.9× usualPohang, 16 April: 20.2 µg/m³, 1.2× usualPohang, 17 April: 53.5 µg/m³, 3.2× usualPohang, 18 April: 66.8 µg/m³, 4.0× usualPohang, 19 April: 43.4 µg/m³, 2.6× usualPohang, 20 April: 33.0 µg/m³, 2.0× usualPohang, 21 April: 17.2 µg/m³, 1.0× usualPohang, 22 April: 16.5 µg/m³, 1.0× usualPohang, 23 April: 14.4 µg/m³, 0.9× usualPohang, 24 April: 12.5 µg/m³, 0.7× usualAmagasakiAmagasaki, 13 April: 11.7 µg/m³, 1.1× usualAmagasaki, 14 April: 12.2 µg/m³, 1.1× usualAmagasaki, 15 April: 12.7 µg/m³, 1.2× usualAmagasaki, 16 April: 12.8 µg/m³, 1.2× usualAmagasaki, 17 April: 26.9 µg/m³, 2.5× usualAmagasaki, 18 April: 66.2 µg/m³, 6.2× usualAmagasaki, 19 April: 22.3 µg/m³, 2.1× usualAmagasaki, 20 April: 21.2 µg/m³, 2.0× usualAmagasaki, 21 April: 12.2 µg/m³, 1.1× usualAmagasaki, 22 April: 6.1 µg/m³, 0.6× usualAmagasaki, 23 April: 6.5 µg/m³, 0.6× usualAmagasaki, 24 April: 2.3 µg/m³, 0.2× usualSantyokuSantyoku, 13 April: 21.3 µg/m³, 1.4× usualSantyoku, 14 April: 18.1 µg/m³, 1.2× usualSantyoku, 15 April: 13.7 µg/m³, 0.9× usualSantyoku, 16 April: 27.5 µg/m³, 1.8× usualSantyoku, 17 April: 65.2 µg/m³, 4.2× usualSantyoku, 18 April: 55.2 µg/m³, 3.5× usualSantyoku, 19 April: 26.8 µg/m³, 1.7× usualSantyoku, 20 April: 26.3 µg/m³, 1.7× usualSantyoku, 21 April: 16.4 µg/m³, 1.1× usualSantyoku, 22 April: 12.7 µg/m³, 0.8× usualSantyoku, 23 April: 9.6 µg/m³, 0.6× usualSantyoku, 24 April: 4.1 µg/m³, 0.3× usualKimhaeKimhae, 13 April: 14.8 µg/m³, 1.1× usualKimhae, 14 April: 12.9 µg/m³, 0.9× usualKimhae, 15 April: 11.4 µg/m³, 0.8× usualKimhae, 16 April: 20.5 µg/m³, 1.5× usualKimhae, 17 April: 44.6 µg/m³, 3.3× usualKimhae, 18 April: 64.8 µg/m³, 4.7× usualKimhae, 19 April: 51.3 µg/m³, 3.7× usualKimhae, 20 April: 23.6 µg/m³, 1.7× usualKimhae, 21 April: 5.7 µg/m³, 0.4× usualKimhae, 22 April: 13.3 µg/m³, 1.0× usualKimhae, 23 April: 11.7 µg/m³, 0.9× usualKimhae, 24 April: 9.4 µg/m³, 0.7× usualYeonilYeonil, 13 April: 21.1 µg/m³, 1.4× usualYeonil, 14 April: 18.4 µg/m³, 1.2× usualYeonil, 15 April: 20.8 µg/m³, 1.4× usualYeonil, 16 April: 18.7 µg/m³, 1.2× usualYeonil, 17 April: 51.1 µg/m³, 3.4× usualYeonil, 18 April: 64.3 µg/m³, 4.3× usualYeonil, 19 April: 40.3 µg/m³, 2.7× usualYeonil, 20 April: 31.5 µg/m³, 2.1× usualYeonil, 21 April: 16.4 µg/m³, 1.1× usualYeonil, 22 April: 14.0 µg/m³, 0.9× usualYeonil, 23 April: 9.6 µg/m³, 0.6× usualYeonil, 24 April: 10.4 µg/m³, 0.7× usualSinhyeonSinhyeon, 13 April: 13.8 µg/m³, 0.9× usualSinhyeon, 14 April: 10.2 µg/m³, 0.7× usualSinhyeon, 15 April: 6.6 µg/m³, 0.4× usualSinhyeon, 16 April: 7.6 µg/m³, 0.5× usualSinhyeon, 17 April: 37.0 µg/m³, 2.4× usualSinhyeon, 18 April: 62.9 µg/m³, 4.1× usualSinhyeon, 19 April: 58.4 µg/m³, 3.8× usualSinhyeon, 20 April: 21.3 µg/m³, 1.4× usualSinhyeon, 21 April: 2.7 µg/m³, 0.2× usualSinhyeon, 22 April: 11.1 µg/m³, 0.7× usualSinhyeon, 23 April: 11.0 µg/m³, 0.7× usualSinhyeon, 24 April: 4.6 µg/m³, 0.3× usualYangsanYangsan, 13 April: 13.1 µg/m³, 1.0× usualYangsan, 14 April: 10.7 µg/m³, 0.8× usualYangsan, 15 April: 8.6 µg/m³, 0.6× usualYangsan, 16 April: 16.8 µg/m³, 1.2× usualYangsan, 17 April: 48.3 µg/m³, 3.6× usualYangsan, 18 April: 62.2 µg/m³, 4.6× usualYangsan, 19 April: 43.0 µg/m³, 3.2× usualYangsan, 20 April: 20.7 µg/m³, 1.5× usualYangsan, 21 April: 4.2 µg/m³, 0.3× usualYangsan, 22 April: 11.3 µg/m³, 0.8× usualYangsan, 23 April: 9.6 µg/m³, 0.7× usualYangsan, 24 April: 9.5 µg/m³, 0.7× usualShiroishiShiroishi, 13 April: 9.2 µg/m³, 0.9× usualShiroishi, 14 April: 10.6 µg/m³, 1.0× usualShiroishi, 15 April: 15.0 µg/m³, 1.5× usualShiroishi, 16 April: 15.3 µg/m³, 1.5× usualShiroishi, 17 April: 26.1 µg/m³, 2.5× usualShiroishi, 18 April: 61.9 µg/m³, 6.0× usualShiroishi, 19 April: 27.6 µg/m³, 2.7× usualShiroishi, 20 April: 20.2 µg/m³, 2.0× usualShiroishi, 21 April: 21.2 µg/m³, 2.1× usualShiroishi, 22 April: 11.4 µg/m³, 1.1× usualShiroishi, 23 April: 5.2 µg/m³, 0.5× usualShiroishi, 24 April: 4.7 µg/m³, 0.5× usualMiryangMiryang, 13 April: 16.9 µg/m³, 1.1× usualMiryang, 14 April: 14.3 µg/m³, 0.9× usualMiryang, 15 April: 12.8 µg/m³, 0.8× usualMiryang, 16 April: 22.3 µg/m³, 1.4× usualMiryang, 17 April: 48.5 µg/m³, 3.1× usualMiryang, 18 April: 59.6 µg/m³, 3.8× usualMiryang, 19 April: 46.1 µg/m³, 3.0× usualMiryang, 20 April: 24.4 µg/m³, 1.6× usualMiryang, 21 April: 6.8 µg/m³, 0.4× usualMiryang, 22 April: 13.3 µg/m³, 0.9× usualMiryang, 23 April: 11.9 µg/m³, 0.8× usualMiryang, 24 April: 8.1 µg/m³, 0.5× usualEisenEisen, 13 April: 22.5 µg/m³, 1.6× usualEisen, 14 April: 15.5 µg/m³, 1.1× usualEisen, 15 April: 15.0 µg/m³, 1.1× usualEisen, 16 April: 19.2 µg/m³, 1.4× usualEisen, 17 April: 49.9 µg/m³, 3.6× usualEisen, 18 April: 59.3 µg/m³, 4.3× usualEisen, 19 April: 40.5 µg/m³, 3.0× usualEisen, 20 April: 28.0 µg/m³, 2.0× usualEisen, 21 April: 7.8 µg/m³, 0.6× usualEisen, 22 April: 12.5 µg/m³, 0.9× usualEisen, 23 April: 8.9 µg/m³, 0.6× usualEisen, 24 April: 8.7 µg/m³, 0.6× usualTongyeongTongyeong, 13 April: 13.3 µg/m³, 1.0× usualTongyeong, 14 April: 13.1 µg/m³, 0.9× usualTongyeong, 15 April: 7.0 µg/m³, 0.5× usualTongyeong, 16 April: 10.3 µg/m³, 0.7× usualTongyeong, 17 April: 34.6 µg/m³, 2.5× usualTongyeong, 18 April: 59.2 µg/m³, 4.3× usualTongyeong, 19 April: 55.0 µg/m³, 4.0× usualTongyeong, 20 April: 24.6 µg/m³, 1.8× usualTongyeong, 21 April: 3.5 µg/m³, 0.3× usualTongyeong, 22 April: 12.6 µg/m³, 0.9× usualTongyeong, 23 April: 10.1 µg/m³, 0.7× usualTongyeong, 24 April: 6.7 µg/m³, 0.5× usualHayangHayang, 13 April: 25.4 µg/m³, 1.6× usualHayang, 14 April: 18.4 µg/m³, 1.2× usualHayang, 15 April: 16.3 µg/m³, 1.1× usualHayang, 16 April: 19.9 µg/m³, 1.3× usualHayang, 17 April: 51.9 µg/m³, 3.3× usualHayang, 18 April: 58.1 µg/m³, 3.7× usualHayang, 19 April: 43.2 µg/m³, 2.8× usualHayang, 20 April: 31.0 µg/m³, 2.0× usualHayang, 21 April: 10.8 µg/m³, 0.7× usualHayang, 22 April: 15.1 µg/m³, 1.0× usualHayang, 23 April: 10.5 µg/m³, 0.7× usualHayang, 24 April: 10.7 µg/m³, 0.7× usualSugaiSugai, 13 April: 11.6 µg/m³, 1.1× usualSugai, 14 April: 14.2 µg/m³, 1.4× usualSugai, 15 April: 12.8 µg/m³, 1.3× usualSugai, 16 April: 8.7 µg/m³, 0.9× usualSugai, 17 April: 33.1 µg/m³, 3.3× usualSugai, 18 April: 56.5 µg/m³, 5.6× usualSugai, 19 April: 24.2 µg/m³, 2.4× usualSugai, 20 April: 20.1 µg/m³, 2.0× usualSugai, 21 April: 11.0 µg/m³, 1.1× usualSugai, 22 April: 4.7 µg/m³, 0.5× usualSugai, 23 April: 5.3 µg/m³, 0.5× usualSugai, 24 April: 1.6 µg/m³, 0.2× usualYeongjuYeongju, 13 April: 28.5 µg/m³, 1.6× usualYeongju, 14 April: 18.2 µg/m³, 1.0× usualYeongju, 15 April: 15.0 µg/m³, 0.8× usualYeongju, 16 April: 26.8 µg/m³, 1.5× usualYeongju, 17 April: 55.5 µg/m³, 3.1× usualYeongju, 18 April: 47.2 µg/m³, 2.6× usualYeongju, 19 April: 35.5 µg/m³, 2.0× usualYeongju, 20 April: 28.6 µg/m³, 1.6× usualYeongju, 21 April: 17.4 µg/m³, 1.0× usualYeongju, 22 April: 20.7 µg/m³, 1.2× usualYeongju, 23 April: 19.4 µg/m³, 1.1× usualYeongju, 24 April: 9.9 µg/m³, 0.6× usualHōryūjiHōryūji, 13 April: 12.2 µg/m³, 1.2× usualHōryūji, 14 April: 13.1 µg/m³, 1.3× usualHōryūji, 15 April: 14.0 µg/m³, 1.3× usualHōryūji, 16 April: 8.1 µg/m³, 0.8× usualHōryūji, 17 April: 29.3 µg/m³, 2.8× usualHōryūji, 18 April: 55.4 µg/m³, 5.3× usualHōryūji, 19 April: 24.7 µg/m³, 2.4× usualHōryūji, 20 April: 22.7 µg/m³, 2.2× usualHōryūji, 21 April: 11.9 µg/m³, 1.1× usualHōryūji, 22 April: 5.7 µg/m³, 0.5× usualHōryūji, 23 April: 3.9 µg/m³, 0.4× usualHōryūji, 24 April: 3.3 µg/m³, 0.3× usualIcheon-siIcheon-si, 13 April: 25.9 µg/m³, 1.4× usualIcheon-si, 14 April: 26.3 µg/m³, 1.4× usualIcheon-si, 15 April: 16.5 µg/m³, 0.9× usualIcheon-si, 16 April: 35.0 µg/m³, 1.9× usualIcheon-si, 17 April: 54.7 µg/m³, 2.9× usualIcheon-si, 18 April: 37.6 µg/m³, 2.0× usualIcheon-si, 19 April: 34.0 µg/m³, 1.8× usualIcheon-si, 20 April: 38.2 µg/m³, 2.0× usualIcheon-si, 21 April: 9.1 µg/m³, 0.5× usualIcheon-si, 22 April: 18.8 µg/m³, 1.0× usualIcheon-si, 23 April: 12.7 µg/m³, 0.7× usualIcheon-si, 24 April: 8.9 µg/m³, 0.5× usualGyeongsan-siGyeongsan-si, 13 April: 20.4 µg/m³, 1.3× usualGyeongsan-si, 14 April: 15.1 µg/m³, 1.0× usualGyeongsan-si, 15 April: 13.1 µg/m³, 0.9× usualGyeongsan-si, 16 April: 18.5 µg/m³, 1.2× usualGyeongsan-si, 17 April: 47.6 µg/m³, 3.1× usualGyeongsan-si, 18 April: 54.6 µg/m³, 3.6× usualGyeongsan-si, 19 April: 39.3 µg/m³, 2.6× usualGyeongsan-si, 20 April: 30.4 µg/m³, 2.0× usualGyeongsan-si, 21 April: 11.4 µg/m³, 0.8× usualGyeongsan-si, 22 April: 14.2 µg/m³, 0.9× usualGyeongsan-si, 23 April: 9.9 µg/m³, 0.7× usualGyeongsan-si, 24 April: 10.5 µg/m³, 0.7× usualYawataYawata, 13 April: 13.0 µg/m³, 1.1× usualYawata, 14 April: 13.4 µg/m³, 1.1× usualYawata, 15 April: 14.0 µg/m³, 1.2× usualYawata, 16 April: 9.3 µg/m³, 0.8× usualYawata, 17 April: 35.5 µg/m³, 3.0× usualYawata, 18 April: 54.5 µg/m³, 4.6× usualYawata, 19 April: 23.8 µg/m³, 2.0× usualYawata, 20 April: 21.4 µg/m³, 1.8× usualYawata, 21 April: 13.2 µg/m³, 1.1× usualYawata, 22 April: 6.8 µg/m³, 0.6× usualYawata, 23 April: 6.5 µg/m³, 0.5× usualYawata, 24 April: 3.1 µg/m³, 0.3× usualChangwonChangwon, 13 April: 14.3 µg/m³, 1.1× usualChangwon, 14 April: 14.6 µg/m³, 1.1× usualChangwon, 15 April: 13.7 µg/m³, 1.0× usualChangwon, 16 April: 21.8 µg/m³, 1.6× usualChangwon, 17 April: 40.3 µg/m³, 3.0× usualChangwon, 18 April: 54.4 µg/m³, 4.1× usualChangwon, 19 April: 44.8 µg/m³, 3.3× usualChangwon, 20 April: 23.5 µg/m³, 1.8× usualChangwon, 21 April: 5.8 µg/m³, 0.4× usualChangwon, 22 April: 14.1 µg/m³, 1.1× usualChangwon, 23 April: 13.5 µg/m³, 1.0× usualChangwon, 24 April: 9.7 µg/m³, 0.7× usualKameyamaKameyama, 13 April: 14.2 µg/m³, 1.4× usualKameyama, 14 April: 17.5 µg/m³, 1.7× usualKameyama, 15 April: 15.2 µg/m³, 1.5× usualKameyama, 16 April: 11.0 µg/m³, 1.1× usualKameyama, 17 April: 38.0 µg/m³, 3.7× usualKameyama, 18 April: 54.0 µg/m³, 5.2× usualKameyama, 19 April: 32.6 µg/m³, 3.1× usualKameyama, 20 April: 25.0 µg/m³, 2.4× usualKameyama, 21 April: 11.8 µg/m³, 1.1× usualKameyama, 22 April: 6.1 µg/m³, 0.6× usualKameyama, 23 April: 11.6 µg/m³, 1.1× usualKameyama, 24 April: 5.1 µg/m³, 0.5× usualTenriTenri, 13 April: 12.3 µg/m³, 1.2× usualTenri, 14 April: 13.3 µg/m³, 1.3× usualTenri, 15 April: 14.1 µg/m³, 1.3× usualTenri, 16 April: 6.3 µg/m³, 0.6× usualTenri, 17 April: 29.1 µg/m³, 2.8× usualTenri, 18 April: 53.8 µg/m³, 5.1× usualTenri, 19 April: 30.5 µg/m³, 2.9× usualTenri, 20 April: 22.0 µg/m³, 2.1× usualTenri, 21 April: 11.4 µg/m³, 1.1× usualTenri, 22 April: 4.5 µg/m³, 0.4× usualTenri, 23 April: 3.2 µg/m³, 0.3× usualTenri, 24 April: 1.9 µg/m³, 0.2× usualNaesŏNaesŏ, 13 April: 18.1 µg/m³, 1.2× usualNaesŏ, 14 April: 16.6 µg/m³, 1.1× usualNaesŏ, 15 April: 13.8 µg/m³, 0.9× usualNaesŏ, 16 April: 19.5 µg/m³, 1.3× usualNaesŏ, 17 April: 39.0 µg/m³, 2.7× usualNaesŏ, 18 April: 53.4 µg/m³, 3.7× usualNaesŏ, 19 April: 43.1 µg/m³, 3.0× usualNaesŏ, 20 April: 19.3 µg/m³, 1.3× usualNaesŏ, 21 April: 8.8 µg/m³, 0.6× usualNaesŏ, 22 April: 15.0 µg/m³, 1.0× usualNaesŏ, 23 April: 13.6 µg/m³, 0.9× usualNaesŏ, 24 April: 10.2 µg/m³, 0.7× usualPubalPubal, 13 April: 28.3 µg/m³, 1.3× usualPubal, 14 April: 22.0 µg/m³, 1.0× usualPubal, 15 April: 11.4 µg/m³, 0.5× usualPubal, 16 April: 35.3 µg/m³, 1.6× usualPubal, 17 April: 52.8 µg/m³, 2.4× usualPubal, 18 April: 38.7 µg/m³, 1.8× usualPubal, 19 April: 33.5 µg/m³, 1.5× usualPubal, 20 April: 40.6 µg/m³, 1.9× usualPubal, 21 April: 9.8 µg/m³, 0.5× usualPubal, 22 April: 17.1 µg/m³, 0.8× usualPubal, 23 April: 12.8 µg/m³, 0.6× usualPubal, 24 April: 9.3 µg/m³, 0.4× usualCheongsong gunCheongsong gun, 13 April: 19.8 µg/m³, 1.7× usualCheongsong gun, 14 April: 11.3 µg/m³, 1.0× usualCheongsong gun, 15 April: 10.6 µg/m³, 0.9× usualCheongsong gun, 16 April: 16.5 µg/m³, 1.4× usualCheongsong gun, 17 April: 48.9 µg/m³, 4.1× usualCheongsong gun, 18 April: 52.5 µg/m³, 4.4× usualCheongsong gun, 19 April: 27.1 µg/m³, 2.3× usualCheongsong gun, 20 April: 20.6 µg/m³, 1.7× usualCheongsong gun, 21 April: 11.6 µg/m³, 1.0× usualCheongsong gun, 22 April: 13.1 µg/m³, 1.1× usualCheongsong gun, 23 April: 9.8 µg/m³, 0.8× usualCheongsong gun, 24 April: 5.3 µg/m³, 0.4× usualYecheonYecheon, 13 April: 22.4 µg/m³, 1.5× usualYecheon, 14 April: 18.6 µg/m³, 1.3× usualYecheon, 15 April: 17.0 µg/m³, 1.2× usualYecheon, 16 April: 26.0 µg/m³, 1.8× usualYecheon, 17 April: 52.3 µg/m³, 3.6× usualYecheon, 18 April: 43.3 µg/m³, 3.0× usualYecheon, 19 April: 31.3 µg/m³, 2.2× usualYecheon, 20 April: 25.7 µg/m³, 1.8× usualYecheon, 21 April: 15.8 µg/m³, 1.1× usualYecheon, 22 April: 16.3 µg/m³, 1.1× usualYecheon, 23 April: 11.1 µg/m³, 0.8× usualYecheon, 24 April: 9.8 µg/m³, 0.7× usualYoshiokaYoshioka, 13 April: 10.7 µg/m³, 1.1× usualYoshioka, 14 April: 12.6 µg/m³, 1.3× usualYoshioka, 15 April: 18.1 µg/m³, 1.9× usualYoshioka, 16 April: 22.4 µg/m³, 2.3× usualYoshioka, 17 April: 23.4 µg/m³, 2.4× usualYoshioka, 18 April: 70.8 µg/m³, 7.4× usualYoshioka, 19 April: 16.8 µg/m³, 1.8× usualYoshioka, 20 April: 14.0 µg/m³, 1.5× usualYoshioka, 21 April: 17.9 µg/m³, 1.9× usualYoshioka, 22 April: 11.0 µg/m³, 1.1× usualYoshioka, 23 April: 6.6 µg/m³, 0.7× usualYoshioka, 24 April: 4.9 µg/m³, 0.5× usualNakatsuNakatsu, 13 April: 16.0 µg/m³, 1.4× usualNakatsu, 14 April: 15.5 µg/m³, 1.4× usualNakatsu, 15 April: 12.0 µg/m³, 1.1× usualNakatsu, 16 April: 9.9 µg/m³, 0.9× usualNakatsu, 17 April: 21.2 µg/m³, 1.9× usualNakatsu, 18 April: 45.6 µg/m³, 4.1× usualNakatsu, 19 April: 64.1 µg/m³, 5.8× usualNakatsu, 20 April: 32.2 µg/m³, 2.9× usualNakatsu, 21 April: 11.9 µg/m³, 1.1× usualNakatsu, 22 April: 9.0 µg/m³, 0.8× usualNakatsu, 23 April: 10.0 µg/m³, 0.9× usualNakatsu, 24 April: 9.6 µg/m³, 0.9× usualIwanumaIwanuma, 13 April: 10.0 µg/m³, 1.0× usualIwanuma, 14 April: 11.0 µg/m³, 1.1× usualIwanuma, 15 April: 16.2 µg/m³, 1.6× usualIwanuma, 16 April: 18.9 µg/m³, 1.9× usualIwanuma, 17 April: 18.7 µg/m³, 1.8× usualIwanuma, 18 April: 63.5 µg/m³, 6.2× usualIwanuma, 19 April: 17.3 µg/m³, 1.7× usualIwanuma, 20 April: 14.0 µg/m³, 1.4× usualIwanuma, 21 April: 20.3 µg/m³, 2.0× usualIwanuma, 22 April: 7.9 µg/m³, 0.8× usualIwanuma, 23 April: 5.5 µg/m³, 0.5× usualIwanuma, 24 April: 3.8 µg/m³, 0.4× usualSōmaSōma, 13 April: 8.6 µg/m³, 0.9× usualSōma, 14 April: 9.7 µg/m³, 1.0× usualSōma, 15 April: 15.5 µg/m³, 1.7× usualSōma, 16 April: 17.6 µg/m³, 1.9× usualSōma, 17 April: 21.6 µg/m³, 2.3× usualSōma, 18 April: 62.4 µg/m³, 6.7× usualSōma, 19 April: 23.4 µg/m³, 2.5× usualSōma, 20 April: 22.4 µg/m³, 2.4× usualSōma, 21 April: 21.3 µg/m³, 2.3× usualSōma, 22 April: 9.9 µg/m³, 1.1× usualSōma, 23 April: 6.1 µg/m³, 0.7× usualSōma, 24 April: 4.0 µg/m³, 0.4× usualTamanoTamano, 13 April: 15.0 µg/m³, 1.3× usualTamano, 14 April: 14.0 µg/m³, 1.2× usualTamano, 15 April: 11.8 µg/m³, 1.0× usualTamano, 16 April: 8.8 µg/m³, 0.8× usualTamano, 17 April: 20.3 µg/m³, 1.8× usualTamano, 18 April: 62.2 µg/m³, 5.4× usualTamano, 19 April: 34.3 µg/m³, 3.0× usualTamano, 20 April: 26.0 µg/m³, 2.3× usualTamano, 21 April: 14.1 µg/m³, 1.2× usualTamano, 22 April: 10.4 µg/m³, 0.9× usualTamano, 23 April: 8.3 µg/m³, 0.7× usualTamano, 24 April: 5.8 µg/m³, 0.5× usualNatori-shiNatori-shi, 13 April: 8.6 µg/m³, 0.9× usualNatori-shi, 14 April: 9.7 µg/m³, 1.0× usualNatori-shi, 15 April: 16.2 µg/m³, 1.7× usualNatori-shi, 16 April: 17.8 µg/m³, 1.9× usualNatori-shi, 17 April: 16.5 µg/m³, 1.7× usualNatori-shi, 18 April: 61.4 µg/m³, 6.4× usualNatori-shi, 19 April: 14.1 µg/m³, 1.5× usualNatori-shi, 20 April: 13.0 µg/m³, 1.4× usualNatori-shi, 21 April: 16.7 µg/m³, 1.7× usualNatori-shi, 22 April: 7.7 µg/m³, 0.8× usualNatori-shi, 23 April: 5.3 µg/m³, 0.6× usualNatori-shi, 24 April: 3.6 µg/m³, 0.4× usualKobeKobe, 13 April: 11.7 µg/m³, 1.3× usualKobe, 14 April: 11.1 µg/m³, 1.2× usualKobe, 15 April: 10.2 µg/m³, 1.1× usualKobe, 16 April: 9.3 µg/m³, 1.0× usualKobe, 17 April: 18.4 µg/m³, 2.0× usualKobe, 18 April: 60.5 µg/m³, 6.6× usualKobe, 19 April: 17.9 µg/m³, 2.0× usualKobe, 20 April: 18.5 µg/m³, 2.0× usualKobe, 21 April: 8.2 µg/m³, 0.9× usualKobe, 22 April: 4.8 µg/m³, 0.5× usualKobe, 23 April: 4.8 µg/m³, 0.5× usualKobe, 24 April: 1.9 µg/m³, 0.2× usualAridaArida, 13 April: 12.1 µg/m³, 1.1× usualArida, 14 April: 10.3 µg/m³, 0.9× usualArida, 15 April: 10.2 µg/m³, 0.9× usualArida, 16 April: 8.5 µg/m³, 0.8× usualArida, 17 April: 18.2 µg/m³, 1.6× usualArida, 18 April: 59.9 µg/m³, 5.3× usualArida, 19 April: 23.0 µg/m³, 2.0× usualArida, 20 April: 17.3 µg/m³, 1.5× usualArida, 21 April: 10.8 µg/m³, 1.0× usualArida, 22 April: 5.0 µg/m³, 0.4× usualArida, 23 April: 6.4 µg/m³, 0.6× usualArida, 24 April: 3.2 µg/m³, 0.3× usualMaebaru-chūōMaebaru-chūō, 13 April: 16.5 µg/m³, 1.3× usualMaebaru-chūō, 14 April: 17.5 µg/m³, 1.4× usualMaebaru-chūō, 15 April: 10.0 µg/m³, 0.8× usualMaebaru-chūō, 16 April: 8.1 µg/m³, 0.7× usualMaebaru-chūō, 17 April: 20.0 µg/m³, 1.6× usualMaebaru-chūō, 18 April: 36.2 µg/m³, 2.9× usualMaebaru-chūō, 19 April: 59.3 µg/m³, 4.8× usualMaebaru-chūō, 20 April: 27.6 µg/m³, 2.2× usualMaebaru-chūō, 21 April: 10.6 µg/m³, 0.9× usualMaebaru-chūō, 22 April: 12.0 µg/m³, 1.0× usualMaebaru-chūō, 23 April: 13.0 µg/m³, 1.1× usualMaebaru-chūō, 24 April: 8.3 µg/m³, 0.7× usualNishinomiyaNishinomiya, 13 April: 11.1 µg/m³, 1.1× usualNishinomiya, 14 April: 11.3 µg/m³, 1.2× usualNishinomiya, 15 April: 11.1 µg/m³, 1.1× usualNishinomiya, 16 April: 9.3 µg/m³, 0.9× usualNishinomiya, 17 April: 20.7 µg/m³, 2.1× usualNishinomiya, 18 April: 58.4 µg/m³, 6.0× usualNishinomiya, 19 April: 18.4 µg/m³, 1.9× usualNishinomiya, 20 April: 19.4 µg/m³, 2.0× usualNishinomiya, 21 April: 10.0 µg/m³, 1.0× usualNishinomiya, 22 April: 5.8 µg/m³, 0.6× usualNishinomiya, 23 April: 5.6 µg/m³, 0.6× usualNishinomiya, 24 April: 2.1 µg/m³, 0.2× usualAkashiAkashi, 13 April: 12.4 µg/m³, 1.2× usualAkashi, 14 April: 13.0 µg/m³, 1.3× usualAkashi, 15 April: 11.4 µg/m³, 1.1× usualAkashi, 16 April: 9.1 µg/m³, 0.9× usualAkashi, 17 April: 20.5 µg/m³, 2.0× usualAkashi, 18 April: 56.9 µg/m³, 5.6× usualAkashi, 19 April: 22.0 µg/m³, 2.2× usualAkashi, 20 April: 19.3 µg/m³, 1.9× usualAkashi, 21 April: 9.4 µg/m³, 0.9× usualAkashi, 22 April: 7.0 µg/m³, 0.7× usualAkashi, 23 April: 5.3 µg/m³, 0.5× usualAkashi, 24 April: 3.6 µg/m³, 0.4× usualFukuyamaFukuyama, 13 April: 15.7 µg/m³, 1.3× usualFukuyama, 14 April: 20.3 µg/m³, 1.6× usualFukuyama, 15 April: 14.4 µg/m³, 1.2× usualFukuyama, 16 April: 10.2 µg/m³, 0.8× usualFukuyama, 17 April: 18.5 µg/m³, 1.5× usualFukuyama, 18 April: 56.9 µg/m³, 4.6× usualFukuyama, 19 April: 35.4 µg/m³, 2.8× usualFukuyama, 20 April: 28.4 µg/m³, 2.3× usualFukuyama, 21 April: 12.1 µg/m³, 1.0× usualFukuyama, 22 April: 11.4 µg/m³, 0.9× usualFukuyama, 23 April: 11.0 µg/m³, 0.9× usualFukuyama, 24 April: 6.8 µg/m³, 0.5× usualMatsushimaMatsushima, 13 April: 8.5 µg/m³, 1.0× usualMatsushima, 14 April: 8.9 µg/m³, 1.0× usualMatsushima, 15 April: 14.7 µg/m³, 1.7× usualMatsushima, 16 April: 15.0 µg/m³, 1.7× usualMatsushima, 17 April: 20.5 µg/m³, 2.3× usualMatsushima, 18 April: 56.7 µg/m³, 6.4× usualMatsushima, 19 April: 13.0 µg/m³, 1.5× usualMatsushima, 20 April: 9.0 µg/m³, 1.0× usualMatsushima, 21 April: 11.7 µg/m³, 1.3× usualMatsushima, 22 April: 5.8 µg/m³, 0.7× usualMatsushima, 23 April: 3.9 µg/m³, 0.4× usualMatsushima, 24 April: 2.7 µg/m³, 0.3× usualŌsakiŌsaki, 13 April: 8.2 µg/m³, 1.0× usualŌsaki, 14 April: 10.3 µg/m³, 1.2× usualŌsaki, 15 April: 15.2 µg/m³, 1.8× usualŌsaki, 16 April: 16.0 µg/m³, 1.9× usualŌsaki, 17 April: 21.4 µg/m³, 2.5× usualŌsaki, 18 April: 56.5 µg/m³, 6.6× usualŌsaki, 19 April: 14.0 µg/m³, 1.6× usualŌsaki, 20 April: 8.9 µg/m³, 1.0× usualŌsaki, 21 April: 12.4 µg/m³, 1.4× usualŌsaki, 22 April: 7.6 µg/m³, 0.9× usualŌsaki, 23 April: 4.3 µg/m³, 0.5× usualŌsaki, 24 April: 2.0 µg/m³, 0.2× usualMinatoMinato, 13 April: 14.9 µg/m³, 1.5× usualMinato, 14 April: 14.7 µg/m³, 1.5× usualMinato, 15 April: 11.3 µg/m³, 1.1× usualMinato, 16 April: 7.9 µg/m³, 0.8× usualMinato, 17 April: 22.5 µg/m³, 2.2× usualMinato, 18 April: 56.4 µg/m³, 5.6× usualMinato, 19 April: 24.4 µg/m³, 2.4× usualMinato, 20 April: 19.5 µg/m³, 1.9× usualMinato, 21 April: 11.3 µg/m³, 1.1× usualMinato, 22 April: 7.1 µg/m³, 0.7× usualMinato, 23 April: 9.0 µg/m³, 0.9× usualMinato, 24 April: 6.7 µg/m³, 0.7× usualSaseboSasebo, 13 April: 14.3 µg/m³, 1.4× usualSasebo, 14 April: 12.5 µg/m³, 1.2× usualSasebo, 15 April: 8.4 µg/m³, 0.8× usualSasebo, 16 April: 6.3 µg/m³, 0.6× usualSasebo, 17 April: 18.8 µg/m³, 1.8× usualSasebo, 18 April: 45.7 µg/m³, 4.4× usualSasebo, 19 April: 56.1 µg/m³, 5.3× usualSasebo, 20 April: 23.6 µg/m³, 2.2× usualSasebo, 21 April: 8.0 µg/m³, 0.8× usualSasebo, 22 April: 5.0 µg/m³, 0.5× usualSasebo, 23 April: 10.7 µg/m³, 1.0× usualSasebo, 24 April: 7.9 µg/m³, 0.8× usualTagajō-shiTagajō-shi, 13 April: 8.3 µg/m³, 0.9× usualTagajō-shi, 14 April: 8.9 µg/m³, 1.0× usualTagajō-shi, 15 April: 13.6 µg/m³, 1.5× usualTagajō-shi, 16 April: 16.0 µg/m³, 1.8× usualTagajō-shi, 17 April: 17.0 µg/m³, 1.9× usualTagajō-shi, 18 April: 55.8 µg/m³, 6.3× usualTagajō-shi, 19 April: 11.9 µg/m³, 1.3× usualTagajō-shi, 20 April: 10.8 µg/m³, 1.2× usualTagajō-shi, 21 April: 13.1 µg/m³, 1.5× usualTagajō-shi, 22 April: 5.7 µg/m³, 0.6× usualTagajō-shi, 23 April: 3.8 µg/m³, 0.4× usualTagajō-shi, 24 April: 2.8 µg/m³, 0.3× usualTakahashiTakahashi, 13 April: 13.5 µg/m³, 1.3× usualTakahashi, 14 April: 15.7 µg/m³, 1.5× usualTakahashi, 15 April: 11.9 µg/m³, 1.1× usualTakahashi, 16 April: 7.7 µg/m³, 0.7× usualTakahashi, 17 April: 22.5 µg/m³, 2.1× usualTakahashi, 18 April: 55.2 µg/m³, 5.2× usualTakahashi, 19 April: 29.5 µg/m³, 2.8× usualTakahashi, 20 April: 22.0 µg/m³, 2.1× usualTakahashi, 21 April: 10.4 µg/m³, 1.0× usualTakahashi, 22 April: 7.7 µg/m³, 0.7× usualTakahashi, 23 April: 4.9 µg/m³, 0.5× usualTakahashi, 24 April: 3.1 µg/m³, 0.3× usualYeonggwangYeonggwang, 13 April: 15.5 µg/m³, 1.1× usualYeonggwang, 14 April: 12.4 µg/m³, 0.9× usualYeonggwang, 15 April: 6.9 µg/m³, 0.5× usualYeonggwang, 16 April: 15.8 µg/m³, 1.2× usualYeonggwang, 17 April: no readingYeonggwang, 18 April: 55.0 µg/m³, 4.0× usualYeonggwang, 19 April: 20.6 µg/m³, 1.5× usualYeonggwang, 20 April: 20.0 µg/m³, 1.5× usualYeonggwang, 21 April: 5.1 µg/m³, 0.4× usualYeonggwang, 22 April: 4.8 µg/m³, 0.4× usualYeonggwang, 23 April: 11.5 µg/m³, 0.8× usualYeonggwang, 24 April: 9.8 µg/m³, 0.7× usualIwadeIwade, 13 April: 11.6 µg/m³, 1.2× usualIwade, 14 April: 12.7 µg/m³, 1.3× usualIwade, 15 April: 12.3 µg/m³, 1.2× usualIwade, 16 April: 6.4 µg/m³, 0.6× usualIwade, 17 April: 20.8 µg/m³, 2.1× usualIwade, 18 April: 54.3 µg/m³, 5.4× usualIwade, 19 April: 22.5 µg/m³, 2.3× usualIwade, 20 April: 17.4 µg/m³, 1.7× usualIwade, 21 April: 10.6 µg/m³, 1.1× usualIwade, 22 April: 5.6 µg/m³, 0.6× usualIwade, 23 April: 7.0 µg/m³, 0.7× usualIwade, 24 April: 5.8 µg/m³, 0.6× usualGotōGotō, 13 April: 11.1 µg/m³, 1.2× usualGotō, 14 April: 10.8 µg/m³, 1.1× usualGotō, 15 April: 8.6 µg/m³, 0.9× usualGotō, 16 April: 6.0 µg/m³, 0.6× usualGotō, 17 April: 20.7 µg/m³, 2.2× usualGotō, 18 April: 39.7 µg/m³, 4.2× usualGotō, 19 April: 53.8 µg/m³, 5.7× usualGotō, 20 April: 20.9 µg/m³, 2.2× usualGotō, 21 April: 8.5 µg/m³, 0.9× usualGotō, 22 April: 5.1 µg/m³, 0.5× usualGotō, 23 April: 10.9 µg/m³, 1.1× usualGotō, 24 April: 7.8 µg/m³, 0.8× usualSadoSado, 13 April: 9.8 µg/m³, 1.0× usualSado, 14 April: 12.3 µg/m³, 1.3× usualSado, 15 April: 15.6 µg/m³, 1.6× usualSado, 16 April: 13.7 µg/m³, 1.4× usualSado, 17 April: 21.0 µg/m³, 2.2× usualSado, 18 April: 53.5 µg/m³, 5.6× usualSado, 19 April: 33.7 µg/m³, 3.5× usualSado, 20 April: 22.4 µg/m³, 2.4× usualSado, 21 April: 10.4 µg/m³, 1.1× usualSado, 22 April: 8.1 µg/m³, 0.9× usualSado, 23 April: 9.4 µg/m³, 1.0× usualSado, 24 April: 2.7 µg/m³, 0.3× usualIshinomakiIshinomaki, 13 April: 10.4 µg/m³, 0.9× usualIshinomaki, 14 April: 10.6 µg/m³, 0.9× usualIshinomaki, 15 April: 16.4 µg/m³, 1.4× usualIshinomaki, 16 April: 20.9 µg/m³, 1.8× usualIshinomaki, 17 April: 23.7 µg/m³, 2.1× usualIshinomaki, 18 April: 53.5 µg/m³, 4.7× usualIshinomaki, 19 April: 18.4 µg/m³, 1.6× usualIshinomaki, 20 April: 11.9 µg/m³, 1.0× usualIshinomaki, 21 April: 14.1 µg/m³, 1.2× usualIshinomaki, 22 April: 7.9 µg/m³, 0.7× usualIshinomaki, 23 April: 4.9 µg/m³, 0.4× usualIshinomaki, 24 April: 5.3 µg/m³, 0.5× usualSendaiSendai, 13 April: 7.1 µg/m³, 0.9× usualSendai, 14 April: 8.5 µg/m³, 1.0× usualSendai, 15 April: 13.9 µg/m³, 1.7× usualSendai, 16 April: 14.8 µg/m³, 1.8× usualSendai, 17 April: 16.0 µg/m³, 1.9× usualSendai, 18 April: 53.2 µg/m³, 6.4× usualSendai, 19 April: 10.4 µg/m³, 1.3× usualSendai, 20 April: 11.6 µg/m³, 1.4× usualSendai, 21 April: 14.2 µg/m³, 1.7× usualSendai, 22 April: 6.4 µg/m³, 0.8× usualSendai, 23 April: 3.7 µg/m³, 0.4× usualSendai, 24 April: 1.7 µg/m³, 0.2× usualKakogawachō-honmachiKakogawachō-honmachi, 13 April: 13.5 µg/m³, 1.3× usualKakogawachō-honmachi, 14 April: 15.0 µg/m³, 1.4× usualKakogawachō-honmachi, 15 April: 11.3 µg/m³, 1.0× usualKakogawachō-honmachi, 16 April: 9.0 µg/m³, 0.8× usualKakogawachō-honmachi, 17 April: 21.1 µg/m³, 2.0× usualKakogawachō-honmachi, 18 April: 53.2 µg/m³, 4.9× usualKakogawachō-honmachi, 19 April: 22.6 µg/m³, 2.1× usualKakogawachō-honmachi, 20 April: 21.1 µg/m³, 2.0× usualKakogawachō-honmachi, 21 April: 9.7 µg/m³, 0.9× usualKakogawachō-honmachi, 22 April: 5.5 µg/m³, 0.5× usualKakogawachō-honmachi, 23 April: 4.8 µg/m³, 0.4× usualKakogawachō-honmachi, 24 April: 3.2 µg/m³, 0.3× usualHigashimatsushimaHigashimatsushima, 13 April: 7.4 µg/m³, 0.9× usualHigashimatsushima, 14 April: 8.2 µg/m³, 0.9× usualHigashimatsushima, 15 April: 12.5 µg/m³, 1.4× usualHigashimatsushima, 16 April: 15.0 µg/m³, 1.7× usualHigashimatsushima, 17 April: 21.7 µg/m³, 2.5× usualHigashimatsushima, 18 April: 52.2 µg/m³, 6.0× usualHigashimatsushima, 19 April: 15.8 µg/m³, 1.8× usualHigashimatsushima, 20 April: 8.1 µg/m³, 0.9× usualHigashimatsushima, 21 April: 11.1 µg/m³, 1.3× usualHigashimatsushima, 22 April: 4.8 µg/m³, 0.6× usualHigashimatsushima, 23 April: 3.9 µg/m³, 0.4× usualHigashimatsushima, 24 April: 3.0 µg/m³, 0.3× usual13 Apr1517192123
The 60 cities with the highest readings of 499, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
TsushimaNagasaki, Japan4 73.118 April9.18.0×
GyeongjuGyeongsangbuk-do, South Korea4 93.218 April12.27.6×
YoshiokaMiyagi, Japan1 70.818 April9.67.4×
SōmaFukushima, Japan1 62.418 April9.36.7×
KobeHyōgo, Japan1 60.518 April9.16.6×
ŌsakiMiyagi, Japan1 56.518 April8.66.6×
MatsushimaMiyagi, Japan1 56.718 April8.86.4×
SendaiMiyagi, Japan1 53.218 April8.36.4×
Natori-shiMiyagi, Japan1 61.418 April9.66.4×
Tagajō-shiMiyagi, Japan1 55.818 April8.96.3×
IwanumaMiyagi, Japan1 63.518 April10.26.2×
AmagasakiHyōgo, Japan2 66.218 April10.76.2×
ShiroishiMiyagi, Japan2 61.918 April10.36.0×
HigashimatsushimaMiyagi, Japan1 52.218 April8.76.0×
ToyonakaOsaka, Japan2 50.418 April8.46.0×
NishinomiyaHyōgo, Japan1 58.418 April9.86.0×
NakatsuOita, Japan3 64.119 April11.15.8×
HashimotoWakayama, Japan1 48.818 April8.55.7×
GotōNagasaki, Japan2 53.819 April9.55.7×
AkashiHyōgo, Japan1 56.918 April10.15.6×
SadoNiigata, Japan2 53.518 April9.55.6×
SugaiKyoto, Japan2 56.518 April10.15.6×
MinatoWakayama, Japan1 56.418 April10.15.6×
KainanWakayama, Japan1 51.718 April9.35.6×
TakarazukaHyōgo, Japan2 50.518 April9.15.5×
HimejiHyōgo, Japan1 51.418 April9.45.5×
UngsangGyeongsangnam-do, South Korea4 69.318 April12.75.5×
IwadeWakayama, Japan1 54.318 April10.05.4×
TamanoOkayama, Japan3 62.218 April11.55.4×
HitachiIbaraki, Japan1 37.818 April7.05.4×
JōyōKyoto, Japan2 49.318 April9.25.4×
SaseboNagasaki, Japan2 56.119 April10.55.3×
HōryūjiNara, Japan2 55.418 April10.45.3×
AridaWakayama, Japan1 59.918 April11.35.3×
SaikaiNagasaki, Japan2 46.819 April8.95.3×
MatsuuraNagasaki, Japan2 49.919 April9.55.3×
MoriokaIwate, Japan1 49.318 April9.45.2×
IkiNagasaki, Japan2 44.018 April8.45.2×
NagasakiNagasaki, Japan2 49.719 April9.55.2×
ŌshūIwate, Japan1 34.418 April6.65.2×
TakahashiOkayama, Japan2 55.218 April10.65.2×
KameyamaMie, Japan4 54.018 April10.45.2×
GobōWakayama, Japan1 45.518 April8.85.2×
TenriNara, Japan3 53.818 April10.55.1×
GijangBusan, South Korea4 73.118 April14.45.1×
YokoteAkita, Japan1 40.618 April8.05.1×
KōriyamaFukushima, Japan2 43.518 April8.65.1×
UjiKyoto, Japan2 46.118 April9.25.0×
KinokawaWakayama, Japan1 42.918 April8.65.0×
NantanKyoto, Japan2 51.818 April10.45.0×
NonoichiIshikawa, Japan2 34.318 April6.95.0×
IkarugaHyōgo, Japan1 46.718 April9.45.0×
KōtariKyoto, Japan2 47.618 April9.65.0×
Kakogawachō-honmachiHyōgo, Japan1 53.218 April10.84.9×
TakinomiyaKagawa, Japan1 39.418 April8.04.9×
SaikiOita, Japan2 44.319 April9.04.9×
SokchoGangwon-do, South Korea5 68.417 April13.94.9×
TatsunoHyōgo, Japan1 46.718 April9.54.9×
KizugawaKyoto, Japan2 43.518 April8.94.9×
NabariMie, Japan3 46.718 April9.64.9×
Maebaru-chūōFukuoka, Japan3 59.319 April12.34.8×
HigashineYamagata, Japan1 36.418 April7.64.8×
KusatsuShiga, Japan2 44.018 April9.24.8×
KaminokawaTochigi, Japan3 41.018 April8.64.8×
OnoHyōgo, Japan1 46.518 April9.84.7×
KuriharaMiyagi, Japan1 36.518 April7.74.7×
KyotoKyoto, Japan2 47.418 April10.04.7×
KimhaeGyeongsangnam-do, South Korea3 64.818 April13.74.7×
HanamakiIwate, Japan1 33.518 April7.14.7×
BusanBusan, South Korea3 69.418 April14.94.7×
NamerikawaToyama, Japan2 29.818 April6.44.7×
IshinomakiMiyagi, Japan1 53.518 April11.54.7×
SōjaOkayama, Japan2 49.618 April10.74.6×
HigashinozoeHyōgo, Japan1 47.518 April10.34.6×
KosongGangwon-do, South Korea3 41.517 April9.04.6×
TokushimaTokushima, Japan1 38.218 April8.34.6×
GangneungGangwon-do, South Korea4 61.017 April13.34.6×
YawataKyoto, Japan2 54.518 April11.94.6×
YangsanGyeongsangnam-do, South Korea3 62.218 April13.64.6×
KesennumaMiyagi, Japan1 37.018 April8.14.6×
ObitaNagasaki, Japan2 42.019 April9.24.6×
YoshinogawaTokushima, Japan1 33.318 April7.34.6×
FukuyamaHiroshima, Japan3 56.918 April12.54.6×
ŌtsuShiga, Japan2 39.118 April8.64.5×
WakuyaMiyagi, Japan1 40.018 April8.84.5×
WakasugiFukuoka, Japan2 43.519 April9.64.5×
KaratsuSaga, Japan2 44.819 April9.94.5×
MitoIbaraki, Japan2 37.518 April8.34.5×
HakuiIshikawa, Japan1 40.218 April8.94.5×
MiharaHiroshima, Japan1 42.818 April9.54.5×
Imarichō-kōSaga, Japan3 48.819 April10.94.5×
AmamiKagoshima, Japan1 38.019 April8.54.5×
MotosuGifu, Japan3 38.319 April8.64.5×
T’aebaekGangwon-do, South Korea2 47.217 April10.64.5×
Cheongsong gunGyeongsangbuk-do, South Korea3 52.518 April11.84.4×
Donghae CityGangwon-do, South Korea4 69.317 April15.64.4×
KameokaKyoto, Japan2 40.418 April9.14.4×
Narutochō-mitsuishiTokushima, Japan1 42.118 April9.54.4×
YonezawaYamagata, Japan1 37.118 April8.44.4×
ŌgakiGifu, Japan3 37.918 April8.64.4×
OyabeToyama, Japan1 32.518 April7.44.4×
Kanzakimachi-kanzakiSaga, Japan3 48.319 April11.04.4×
Ureshinomachi-shimojukuSaga, Japan2 45.019 April10.34.4×
FukuokaFukuoka, Japan3 50.619 April11.64.4×
NakamaFukuoka, Japan3 40.519 April9.34.4×
SumotoHyōgo, Japan1 33.018 April7.64.3×
TsuyamaOkayama, Japan1 43.418 April10.04.3×
EisenGyeongsangbuk-do, South Korea4 59.318 April13.74.3×
KanazawaIshikawa, Japan1 35.018 April8.14.3×
SagaSaga, Japan3 45.819 April10.64.3×
TakuSaga, Japan3 44.519 April10.34.3×
AsakuchiOkayama, Japan3 51.818 April12.04.3×
NagatoYamaguchi, Japan1 42.219 April9.84.3×
TakashimaShiga, Japan3 44.218 April10.34.3×
HitachiomiyaIbaraki, Japan1 33.918 April7.94.3×
TogitsuNagasaki, Japan2 45.919 April10.74.3×
YeonilGyeongsangbuk-do, South Korea4 64.318 April15.04.3×
TongyeongGyeongsangnam-do, South Korea3 59.218 April13.94.3×
KitaibarakiIbaraki, Japan1 31.518 April7.44.3×
IkomaNara, Japan1 36.618 April8.64.3×
KasugaFukuoka, Japan2 40.019 April9.44.3×
KurashikiOkayama, Japan3 48.918 April11.54.3×
NiimiOkayama, Japan1 34.018 April8.04.3×
SandachōHyōgo, Japan2 42.918 April10.14.2×
YamagataYamagata, Japan1 36.118 April8.54.2×
Minami-SōmaFukushima, Japan1 36.118 April8.54.2×
TomeMiyagi, Japan1 31.018 April7.34.2×
UtsunomiyaTochigi, Japan2 37.318 April8.84.2×
TakizawaIwate, Japan1 27.918 April6.64.2×
NanaoIshikawa, Japan1 34.618 April8.24.2×
KandaFukuoka, Japan2 44.719 April10.64.2×
KitahamaShiga, Japan1 35.418 April8.44.2×
KanumaTochigi, Japan2 34.918 April8.34.2×
ToyamaToyama, Japan2 37.818 April9.04.2×
KōkaShiga, Japan2 30.618 April7.34.2×
HiragiKagawa, Japan1 39.818 April9.54.2×
HamadaShimane, Japan1 36.019 April8.64.2×
SantyokuGangwon-do, South Korea2 65.217 April15.64.2×
SekimachiGifu, Japan4 42.619 April10.24.2×
SuzakaNagano, Japan3 36.718 April8.84.2×
KashimaSaga, Japan2 42.519 April10.24.2×
Kamojimachō-jōgejimaTokushima, Japan1 34.518 April8.34.2×
ItoshimaFukuoka, Japan2 44.019 April10.64.2×
HikariYamaguchi, Japan2 43.518 April10.54.1×
HagiYamaguchi, Japan1 36.419 April8.84.1×
NasukarasuyamaTochigi, Japan1 28.118 April6.84.1×
SinhyeonGyeongsangnam-do, South Korea3 62.918 April15.34.1×
ShibataNiigata, Japan1 42.618 April10.44.1×
UlsanUlsan, South Korea4 67.118 April16.44.1×
Kashihara-shiNara, Japan1 38.418 April9.44.1×
TsuruokaYamagata, Japan1 33.918 April8.34.1×
YukuhashiFukuoka, Japan2 41.219 April10.14.1×
IgaMie, Japan2 37.118 April9.14.1×
TakeharaHiroshima, Japan1 37.118 April9.14.1×
IwakiFukushima, Japan1 37.518 April9.24.1×
Niitsu-honchōNiigata, Japan1 33.018 April8.14.1×
ChangwonGyeongsangnam-do, South Korea3 54.418 April13.44.1×
UkihaFukuoka, Japan3 41.019 April10.14.1×
IshiokaIbaraki, Japan2 33.518 April8.34.0×
TsubataIshikawa, Japan1 34.318 April8.54.0×
ŌtakeHiroshima, Japan2 43.118 April10.74.0×
YokkaichiMie, Japan4 46.318 April11.54.0×
NagoOkinawa, Japan1 31.819 April7.94.0×
YanagawaFukuoka, Japan2 32.618 April8.14.0×
YeonggwangJeollanam-do, South Korea1 55.018 April13.74.0×
Nara-shiNara, Japan1 34.518 April8.64.0×
BuzenFukuoka, Japan2 37.319 April9.34.0×
FukuchiyamaKyoto, Japan1 39.318 April9.84.0×
ŌmuraNagasaki, Japan2 38.019 April9.54.0×
AnanTokushima, Japan2 40.018 April10.04.0×
MiyakoIwate, Japan1 30.818 April7.74.0×
MasudaShimane, Japan1 36.019 April9.04.0×
MimaTokushima, Japan1 37.418 April9.44.0×
NasushiobaraTochigi, Japan1 25.418 April6.44.0×
NumataGunma, Japan3 34.418 April8.74.0×
PohangGyeongsangbuk-do, South Korea3 66.818 April16.94.0×
GōtsuchōShimane, Japan1 33.919 April8.63.9×
KureHiroshima, Japan1 39.418 April10.03.9×
HashimaGifu, Japan4 40.118 April10.23.9×
IchinosekiIwate, Japan1 30.818 April7.93.9×
Ueno-ebisumachiMie, Japan2 36.618 April9.43.9×
SendaiKagoshima, Japan2 40.119 April10.33.9×
MookaTochigi, Japan1 28.818 April7.43.9×
KushikinoKagoshima, Japan2 37.919 April9.83.9×
GoseongGyeongsangnam-do, South Korea3 51.819 April13.43.9×
KitakyushuFukuoka, Japan2 44.719 April11.63.9×
BizenOkayama, Japan1 42.018 April10.93.9×
ShimonosekiYamaguchi, Japan2 41.919 April10.93.8×
MunakataFukuoka, Japan1 36.919 April9.63.8×
KaniGifu, Japan4 39.119 April10.23.8×
KagaIshikawa, Japan1 34.518 April9.03.8×
ZentsujichóKagawa, Japan1 40.218 April10.53.8×
TakamatsuKagawa, Japan1 39.418 April10.33.8×
OmigawaChiba, Japan1 27.918 April7.33.8×
MiryangGyeongsangnam-do, South Korea3 59.618 April15.63.8×
MiyazuKyoto, Japan2 34.718 April9.13.8×
OgōriFukuoka, Japan2 36.519 April9.63.8×
YurihonjōAkita, Japan1 35.718 April9.43.8×
UedaNagano, Japan3 31.520 April8.33.8×
KogaFukuoka, Japan1 36.819 April9.73.8×
ChikumaNagano, Japan3 29.218 April7.73.8×
ShonaiYamagata, Japan1 30.618 April8.13.8×
KudamatsuYamaguchi, Japan2 38.518 April10.23.8×
IyoEhime, Japan2 38.519 April10.23.8×
Hitachi-NakaIbaraki, Japan1 28.618 April7.63.8×
KomatsuIshikawa, Japan1 32.718 April8.73.8×
HayangGyeongsangbuk-do, South Korea4 58.118 April15.53.7×
ShinjōYamagata, Japan1 30.718 April8.23.7×
KashiwaraNara, Japan1 37.818 April10.13.7×
OkayamaOkayama, Japan1 35.918 April9.63.7×
SaikūMie, Japan1 33.618 April9.03.7×
TosuSaga, Japan2 38.819 April10.43.7×
YameFukuoka, Japan2 34.319 April9.23.7×
FukushimaFukushima, Japan1 46.118 April12.43.7×
ToyohashiAichi, Japan1 31.619 April8.53.7×
ŌdateAkita, Japan1 31.518 April8.53.7×
TobaMie, Japan1 32.618 April8.83.7×
MakiNiigata, Japan1 27.718 April7.53.7×
IsahayaNagasaki, Japan2 35.819 April9.73.7×
AjikiChiba, Japan1 27.318 April7.43.7×
AyabeKyoto, Japan1 35.918 April9.83.7×
HikoneShiga, Japan2 34.418 April9.43.7×
NaesŏGyeongsangnam-do, South Korea3 53.418 April14.63.7×
YoukaichiShiga, Japan2 33.618 April9.23.7×
IzumoShimane, Japan2 33.919 April9.33.6×
AioiHyōgo, Japan1 34.918 April9.63.6×
Aizu-WakamatsuFukushima, Japan1 28.718 April7.93.6×
Kan’onjichōKagawa, Japan2 38.518 April10.63.6×
IzumiKagoshima, Japan2 37.419 April10.33.6×
ŌmihachimanShiga, Japan1 31.218 April8.63.6×
TsuMie, Japan3 37.318 April10.33.6×
YaitaTochigi, Japan1 28.618 April7.93.6×
MarugameKagawa, Japan2 41.618 April11.53.6×
MatsutōIshikawa, Japan1 34.018 April9.43.6×
YecheonGyeongsangbuk-do, South Korea3 52.317 April14.53.6×
MinamiuonumaNiigata, Japan1 29.518 April8.23.6×
GeojeGyeongsangnam-do, South Korea3 48.918 April13.63.6×
TakeoSaga, Japan2 37.019 April10.33.6×
Gyeongsan-siGyeongsangbuk-do, South Korea4 54.618 April15.23.6×
GamagōriAichi, Japan1 30.119 April8.43.6×
Kaseda-shirakameKagoshima, Japan2 34.719 April9.73.6×
AkitaAkita, Japan1 32.518 April9.13.6×
IseMie, Japan1 33.218 April9.33.6×
NaritaChiba, Japan1 28.218 April7.93.6×
ŌmutaFukuoka, Japan3 45.319 April12.73.6×
IizukaFukuoka, Japan1 37.819 April10.63.6×
SagaeYamagata, Japan1 34.218 April9.63.6×
UbeYamaguchi, Japan2 36.619 April10.33.6×
KogaFukuoka, Japan1 41.919 April11.83.6×
KasaokaOkayama, Japan2 41.118 April11.63.5×
ImabariEhime, Japan2 42.518 April12.03.5×
SuzukaMie, Japan3 36.818 April10.43.5×
DamyangJeollanam-do, South Korea2 50.818 April14.43.5×
YachimataChiba, Japan2 28.418 April8.13.5×
TonamiToyama, Japan2 30.518 April8.73.5×
InzaiChiba, Japan1 28.018 April8.03.5×
SanoTochigi, Japan2 31.818 April9.13.5×
Ōdachō-ōdaShimane, Japan2 31.819 April9.13.5×
ToyookaHyōgo, Japan1 33.518 April9.63.5×
HiroshimaHiroshima, Japan1 36.618 April10.53.5×
MinamichitaAichi, Japan2 28.218 April8.13.5×
NakanojōGunma, Japan2 31.318 April9.03.5×
NoshiroAkita, Japan1 30.218 April8.73.5×
YawatahamaEhime, Japan2 31.519 April9.13.5×
KukichūōSaitama, Japan3 34.518 April10.03.5×
HimimachiToyama, Japan1 34.518 April10.03.5×
HigashigōSaga, Japan2 38.319 April11.23.4×
IkedachōTokushima, Japan2 35.218 April10.33.4×
MungyeongGyeongsangbuk-do, South Korea3 48.517 April14.23.4×
AndongGyeongsangbuk-do, South Korea3 52.117 April15.33.4×
MiyoshiHiroshima, Japan1 30.218 April8.93.4×
TokiGifu, Japan3 34.619 April10.23.4×
HonjōSaitama, Japan1 31.518 April9.33.4×
GotembaShizuoka, Japan2 28.718 April8.53.4×
YachiyoChiba, Japan1 29.718 April8.83.4×
KyōtangoKyoto, Japan1 28.918 April8.63.4×
ShirakawaFukushima, Japan1 27.518 April8.23.4×
MineYamaguchi, Japan2 31.519 April9.43.4×
IwataShizuoka, Japan2 29.417 April8.83.3×
Kashima-shiIbaraki, Japan1 27.918 April8.43.3×
Hongch’ŏnGangwon-do, South Korea5 46.817 April14.13.3×
Shimo-tsumaIbaraki, Japan1 28.215 April8.53.3×
ShidoKagawa, Japan1 34.518 April10.43.3×
Misato, SaitamaSaitama, Japan3 33.518 April10.13.3×
SakataYamagata, Japan1 29.518 April8.93.3×
ShironeNiigata, Japan1 28.518 April8.63.3×
MatsusakaMie, Japan1 33.418 April10.13.3×
OyamaTochigi, Japan2 30.018 April9.13.3×
NiigataNiigata, Japan1 28.318 April8.63.3×
UozuToyama, Japan2 32.918 April10.03.3×
MenumaSaitama, Japan3 32.918 April10.03.3×
YokoshibaChiba, Japan1 25.018 April7.63.3×
NōgataFukuoka, Japan1 32.519 April9.93.3×
TanabeWakayama, Japan2 31.518 April9.63.3×
Tanushimarumachi-toyokiFukuoka, Japan3 37.719 April11.53.3×
KagoshimaKagoshima, Japan1 34.719 April10.63.3×
SaijōEhime, Japan2 41.819 April12.83.3×
ShikokuchūōEhime, Japan2 43.119 April13.23.3×
NagaokaNiigata, Japan1 30.318 April9.33.3×
NishiwakiHyōgo, Japan1 30.518 April9.43.2×
SakaiminatoTottori, Japan3 28.219 April8.73.2×
KariyaHyōgo, Japan1 32.418 April10.03.2×
MatsumotoNagano, Japan1 25.918 April8.03.2×
IwakuniYamaguchi, Japan1 33.018 April10.23.2×
ShūnanYamaguchi, Japan2 32.318 April10.03.2×
UwajimaEhime, Japan2 27.119 April8.43.2×
ItoigawaNiigata, Japan2 29.618 April9.23.2×
JumunjinGangwon-do, South Korea2 43.417 April13.53.2×
MiuraKanagawa, Japan1 27.019 April8.43.2×
KasukabeSaitama, Japan2 30.218 April9.43.2×
InashikiIbaraki, Japan1 26.018 April8.13.2×
KurayoshiTottori, Japan1 35.318 April11.03.2×
TatebayashiGunma, Japan2 30.318 April9.53.2×
HōfuYamaguchi, Japan2 31.218 April9.83.2×
NiizaSaitama, Japan3 30.518 April9.63.2×
KashiwaChiba, Japan2 27.018 April8.53.2×
MatsueShimane, Japan3 27.919 April8.83.2×
IchinomiyaAichi, Japan2 30.418 April9.63.2×
HigashihiroshimaHiroshima, Japan1 34.818 April11.03.2×
NarashinoChiba, Japan1 25.318 April8.03.2×
Sakai-nakajimaGunma, Japan3 31.918 April10.13.2×
KazoSaitama, Japan3 31.918 April10.13.2×
SakuraChiba, Japan1 26.518 April8.43.2×
OgaAkita, Japan1 30.618 April9.73.2×
ChangsuJeollabuk-do, South Korea2 42.217 April13.43.1×
FukuroiShizuoka, Japan1 28.817 April9.23.1×
NyūzenToyama, Japan2 33.819 April10.83.1×
NeietsuGangwon-do, South Korea2 39.117 April12.53.1×
NiihamaEhime, Japan2 39.318 April12.63.1×
TokyoTokyo, Japan2 28.018 April9.03.1×
ImizuToyama, Japan2 30.418 April9.83.1×
UnnanShimane, Japan2 28.818 April9.33.1×
Kodamachō-kodamaminamiSaitama, Japan4 32.818 April10.63.1×
Jinan-gunJeollabuk-do, South Korea2 39.618 April12.83.1×
NagahamaShiga, Japan1 30.618 April9.93.1×
AgeoSaitama, Japan3 30.918 April10.03.1×
KochiKochi, Japan1 28.119 April9.13.1×
YeongjuGyeongsangbuk-do, South Korea3 55.517 April18.03.1×
DaeguDaegu, South Korea3 46.518 April15.13.1×
IrumaSaitama, Japan4 31.018 April10.13.1×
KosaiShizuoka, Japan2 27.019 April8.83.1×
OkcheonNorth Chungcheong, South Korea2 42.017 April13.73.1×
NakaIbaraki, Japan1 29.418 April9.63.1×
MorohongōSaitama, Japan4 30.018 April9.83.1×
YoriiSaitama, Japan4 31.818 April10.43.1×
OkazakiAichi, Japan1 28.419 April9.33.1×
AtamiShizuoka, Japan1 25.319 April8.33.0×
KuryeJeollanam-do, South Korea2 35.318 April11.63.0×
YamatoKanagawa, Japan1 25.518 April8.43.0×
OwariasahiAichi, Japan3 35.219 April11.63.0×
TokonameAichi, Japan2 27.918 April9.23.0×
KōnosuSaitama, Japan2 29.418 April9.73.0×
TakaokaToyama, Japan2 29.718 April9.83.0×
HanyūSaitama, Japan2 29.718 April9.83.0×
AzaminoKanagawa, Japan1 26.018 April8.63.0×
BandōIbaraki, Japan1 26.618 April8.83.0×
ShimaMie, Japan1 27.218 April9.03.0×
AsakaSaitama, Japan3 30.518 April10.13.0×
ChiryūAichi, Japan1 25.919 April8.63.0×
KunwiGyeongsangbuk-do, South Korea2 41.817 April13.93.0×
SeogwipoJeju-do, South Korea3 38.118 April12.73.0×
TaharaAichi, Japan2 33.019 April11.03.0×
ChichibuSaitama, Japan2 29.718 April9.93.0×
SayamaSaitama, Japan2 27.018 April9.03.0×
KaminomaAichi, Japan1 25.818 April8.63.0×
OnodaYamaguchi, Japan2 37.419 April12.53.0×
GyōdaSaitama, Japan3 32.618 April10.93.0×
SaitamaSaitama, Japan1 28.118 April9.43.0×
TsurusakiOita, Japan2 31.019 April10.43.0×
HannōSaitama, Japan2 28.618 April9.63.0×
UrayasuChiba, Japan1 25.318 April8.53.0×
MatsudoChiba, Japan1 25.018 April8.43.0×
InabeMie, Japan1 28.518 April9.63.0×
UsukiOita, Japan1 26.119 April8.83.0×
YufuOita, Japan1 25.819 April8.73.0×
ChibaChiba, Japan1 25.118 April8.53.0×
ChinjuGyeongsangnam-do, South Korea3 43.619 April14.82.9×
KamagayaChiba, Japan1 25.218 April8.62.9×
Icheon-siGyeonggi-do, South Korea3 54.717 April18.72.9×
TagawaFukuoka, Japan1 31.019 April10.62.9×
KiryūGunma, Japan2 26.918 April9.22.9×
NagoyaAichi, Japan2 26.018 April8.92.9×
AmaAichi, Japan1 26.018 April8.92.9×
Tottori-shiTottori, Japan1 31.518 April10.82.9×
KurumeFukuoka, Japan3 32.919 April11.32.9×
Shin’ichiHiroshima, Japan1 36.118 April12.42.9×
KawaguchiSaitama, Japan1 27.318 April9.42.9×
Cheongju-siNorth Chungcheong, South Korea2 47.317 April16.32.9×
KumagayaSaitama, Japan2 28.718 April9.92.9×
HwawŏnDaegu, South Korea3 42.818 April14.82.9×
Kameda-honchōNiigata, Japan1 26.618 April9.22.9×
Higashi-MatsuyamaSaitama, Japan3 29.218 April10.12.9×
YokohamaKanagawa, Japan1 26.018 April9.02.9×
NodaChiba, Japan1 25.318 April8.82.9×
KuwanaMie, Japan2 27.018 April9.42.9×
ChikugoFukuoka, Japan3 37.319 April13.02.9×
KunisakiOita, Japan2 26.118 April9.12.9×
HandaAichi, Japan1 25.518 April8.92.9×
GifuGifu, Japan2 26.019 April9.12.9×
SakadoSaitama, Japan2 28.218 April9.92.8×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in Japan and South Korea

Number 2 of 94 episodes in Japan and South Korea since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 94.

Use this page

SmogRank, Japan and South Korea, April 2024: 499 cities with PM2.5 at twice their usual or more, 16 to 21 April 2024, smogrank.com/episodes/2024-04-japan-and-south-korea (accessed 3 October 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.