2026-08-07T20:00:00Z 通常 気象庁本庁 気象庁 2026-08-08T05:00:00+09:00 2026-08-08T06:00:00+09:00 2026-08-09T00:00:00+09:00 509 発表 1 降灰予報 1.1_0 　現在、口永良部島は噴火警戒レベル２（火口周辺規制）です。口永良部島で噴火が発生した場合には、８日０９時から１２時までは火口から西方向、８日２１時から２４時までは火口から西方向に降灰が予想されます。 降灰予報（定時） 06 口永良部島 509 降灰 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 鹿児島県屋久島町 4650500 降灰予報（定時） 06 口永良部島 509 +3026.60+13013.03+657/ 降灰 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 鹿児島県屋久島町 4650500 2026-08-08T06:00:00+09:00 2026-08-08T09:00:00+09:00 降灰 70 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+30.6039+129.8600/+30.6058+129.8800/+30.6011+129.9000/+30.6000+129.9018/+30.5916+129.9000/+30.5909+129.8800/+30.5972+129.8600/+30.6000+129.8545/+30.6039+129.8600/ 西 90 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4663+130.1600/+30.4743+130.1800/+30.4774+130.2000/+30.4600+130.2174/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4274+130.1800/+30.4400+130.1634/+30.4487+130.1600/+30.4600+130.1485/+30.4663+130.1600/ 西 6 鹿児島県屋久島町 4650500 2026-08-08T12:00:00+09:00 2026-08-08T15:00:00+09:00 降灰 70 +30.6431+129.8000/+30.6400+129.8089/+30.6349+129.8000/+30.6400+129.7902/+30.6431+129.8000/ 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西 90 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4614+130.1600/+30.4735+130.1800/+30.4770+130.2000/+30.4600+130.2170/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4281+130.1800/+30.4400+130.1637/+30.4564+130.1600/+30.4600+130.1572/+30.4614+130.1600/ 西 6 鹿児島県屋久島町 4650500 2026-08-08T15:00:00+09:00 2026-08-08T18:00:00+09:00 降灰 70 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+30.5879+129.8400/+30.5800+129.8594/+30.5777+129.8400/+30.5800+129.8355/+30.5879+129.8400/ 西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4602+130.1600/+30.4727+130.1800/+30.4772+130.2000/+30.4600+130.2171/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4268+130.1800/+30.4400+130.1638/+30.4597+130.1600/+30.4600+130.1597/+30.4602+130.1600/ 西 6 鹿児島県屋久島町 4650500 2026-08-08T18:00:00+09:00 2026-08-08T21:00:00+09:00 降灰 70 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+30.5417+129.9600/+30.5400+129.9643/+30.5397+129.9600/+30.5400+129.9513/+30.5417+129.9600/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4712+130.1800/+30.4771+130.2000/+30.4600+130.2171/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4322+130.1800/+30.4400+130.1704/+30.4600+130.1632/+30.4712+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-08T21:00:00+09:00 2026-08-09T00:00:00+09:00 降灰 70 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+30.5604+129.9800/+30.5600+129.9826/+30.5595+129.9800/+30.5600+129.9794/+30.5604+129.9800/ 西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4697+130.1800/+30.4769+130.2000/+30.4600+130.2169/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4327+130.1800/+30.4400+130.1707/+30.4600+130.1645/+30.4697+130.1800/ 西 4 鹿児島県屋久島町 4650500 　現在、口永良部島は噴火警戒レベル２（火口周辺規制）です。口永良部島で噴火が発生した場合には、８日０９時から１２時までは火口から西方向、８日２１時から２４時までは火口から西方向に降灰が予想されます。 　８日６時から８日２４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 　０８日０６時から０９時まで　西　　　　　　　９０ｋｍ　　６ｋｍ　　　　　 　０８日０９時から１２時まで　西　　　　　　　９０ｋｍ　　６ｋｍ　　　　　 　０８日１２時から１５時まで　西　　　　　　　９０ｋｍ　　６ｋｍ　　　　　 　０８日１５時から１８時まで　西　　　　　　　８０ｋｍ　　６ｋｍ　　　　　 　０８日１８時から２１時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０８日２１時から２４時まで　西　　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　 　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：屋久島町 　 　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。 　強風のため、遠方まで小さな噴石が流されるおそれがあります。