2026-09-20T02:00:00Z 通常 気象庁本庁 気象庁 2026-09-20T11:00:00+09:00 2026-09-20T12:00:00+09:00 2026-09-21T06:00:00+09:00 511 発表 1 降灰予報 1.1_0 　現在、諏訪之瀬島は噴火警戒レベル２（火口周辺規制）です。諏訪之瀬島で噴火が発生した場合には、２０日２１時から２４時までは火口から南方向に降灰が予想されます。 降灰予報（定時） 06 諏訪之瀬島 511 降灰 70 鹿児島県十島村 4630400 小さな噴石の落下 75 鹿児島県十島村 4630400 降灰予報（定時） 06 諏訪之瀬島 511 +2938.30+12942.83+796/ 降灰 70 鹿児島県十島村 4630400 小さな噴石の落下 75 鹿児島県十島村 4630400 2026-09-20T12:00:00+09:00 2026-09-20T15:00:00+09:00 降灰 70 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南 50 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7323/+29.6056+129.7200/+29.6128+129.7000/+29.6200+129.6928/+29.6272+129.7000/+29.6400+129.7012/+29.6588+129.7200/ 南 3 鹿児島県十島村 4630400 2026-09-20T15:00:00+09:00 2026-09-20T18:00:00+09:00 降灰 70 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南 60 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7339/+29.6037+129.7200/+29.6200+129.7061/+29.6400+129.7012/+29.6588+129.7200/ 南東 2 鹿児島県十島村 4630400 2026-09-20T18:00:00+09:00 2026-09-20T21:00:00+09:00 降灰 70 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+29.0004+130.0000/+29.0000+130.0001/+28.9998+130.0000/+29.0000+129.9999/+29.0004+130.0000/ 南 80 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7358/+29.6011+129.7200/+29.6200+129.7042/+29.6400+129.7012/+29.6588+129.7200/ 南東 2 鹿児島県十島村 4630400 2026-09-20T21:00:00+09:00 2026-09-21T00:00:00+09:00 降灰 70 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南 80 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7358/+29.6010+129.7200/+29.6200+129.7042/+29.6400+129.7012/+29.6588+129.7200/ 南東 2 鹿児島県十島村 4630400 2026-09-21T00:00:00+09:00 2026-09-21T03:00:00+09:00 降灰 70 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南 80 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7357/+29.6009+129.7200/+29.6200+129.7043/+29.6400+129.7012/+29.6588+129.7200/ 南東 2 鹿児島県十島村 4630400 2026-09-21T03:00:00+09:00 2026-09-21T06:00:00+09:00 降灰 70 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南 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6588+129.7200/+29.6400+129.7388/+29.6200+129.7376/+29.6014+129.7200/+29.6200+129.7048/+29.6400+129.7012/+29.6588+129.7200/ 南東 2 鹿児島県十島村 4630400 　現在、諏訪之瀬島は噴火警戒レベル２（火口周辺規制）です。諏訪之瀬島で噴火が発生した場合には、２０日２１時から２４時までは火口から南方向に降灰が予想されます。 　２０日１２時から２１日６時までに噴火が発生した場合には、以下の方向・距離に降灰及び小さな噴石の落下が予想されます。 　 　時刻　　　　　　　　　　　　火口からの方向　降灰の距離　小さな噴石の距離 　２０日１２時から１５時まで　南　　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　２０日１５時から１８時まで　南　　　　　　　６０ｋｍ　　２ｋｍ　　　　　 　２０日１８時から２１時まで　南　　　　　　　８０ｋｍ　　２ｋｍ　　　　　 　２０日２１時から２４時まで　南　　　　　　　８０ｋｍ　　２ｋｍ　　　　　 　２１日００時から０３時まで　南　　　　　　　８０ｋｍ　　２ｋｍ　　　　　 　２１日０３時から０６時まで　南　　　　　　　７０ｋｍ　　２ｋｍ　　　　　 　 　期間中に噴火が発生した場合には、以下の市町村に降灰が予想されます。 　鹿児島県：十島村 　 　噴煙が火口縁上１０００ｍまで上がった場合の火山灰及び小さな噴石の落下範囲を示しています。 　噴火発生時、小さな噴石の落下が予想される範囲内では、屋内や頑丈な屋根の下などに移動してください。