2026-08-20T14:00:00Z 通常 気象庁本庁 気象庁 2026-08-20T23:00:00+09:00 2026-08-21T00:00:00+09:00 2026-08-21T18:00:00+09:00 508 発表 1 降灰予報 1.1_0 　現在、薩摩硫黄島は噴火警戒レベル２（火口周辺規制）です。薩摩硫黄島で噴火が発生した場合には、２１日０９時から１２時までは火口から北西方向に降灰が予想されます。 降灰予報（定時） 06 薩摩硫黄島 508 降灰 70 鹿児島県三島村 4630300 小さな噴石の落下 75 鹿児島県三島村 4630300 降灰予報（定時） 06 薩摩硫黄島 508 +3047.58+13018.32+704/ 降灰 70 鹿児島県三島村 4630300 小さな噴石の落下 75 鹿児島県三島村 4630300 2026-08-21T00:00:00+09:00 2026-08-21T03:00:00+09:00 降灰 70 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北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8141+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7898+130.2800/+30.8000+130.2676/+30.8141+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T03:00:00+09:00 2026-08-21T06:00:00+09:00 降灰 70 +31.0698+129.8200/+31.0741+129.8400/+31.0720+129.8600/+31.0660+129.8800/+31.0600+129.8934/+31.0579+129.9000/+31.0472+129.9200/+31.0400+129.9295/+31.0352+129.9400/+31.0283+129.9600/+31.0200+129.9693/+31.0133+129.9800/+31.0058+130.0000/+31.0000+130.0108/+30.9966+130.0200/+30.9863+130.0400/+30.9800+130.0504/+30.9664+130.0600/+30.9600+130.0633/+30.9531+130.0800/+30.9400+130.0957/+30.9387+130.1000/+30.9309+130.1200/+30.9200+130.1323/+30.9180+130.1400/+30.9067+130.1600/+30.9000+130.1670/+30.8977+130.1800/+30.8800+130.1992/+30.8798+130.2000/+30.8775+130.2200/+30.8600+130.2379/+30.8598+130.2400/+30.8581+130.2600/+30.8400+130.2782/+30.8399+130.2800/+30.8392+130.3000/+30.8200+130.3192/+30.8146+130.3200/+30.8000+130.3346/+30.7800+130.3219/+30.7781+130.3200/+30.7605+130.3000/+30.7647+130.2800/+30.7800+130.2647/+30.7801+130.2600/+30.7824+130.2400/+30.8000+130.2223/+30.8003+130.2200/+30.8028+130.2000/+30.8200+130.1820/+30.8205+130.1800/+30.8232+130.1600/+30.8400+130.1409/+30.8403+130.1400/+30.8435+130.1200/+30.8600+130.1001/+30.8600+130.1000/+30.8647+130.0800/+30.8752+130.0600/+30.8800+130.0540/+30.8847+130.0400/+30.8968+130.0200/+30.9000+130.0126/+30.9028+130.0000/+30.9134+129.9800/+30.9200+129.9683/+30.9253+129.9600/+30.9400+129.9403/+30.9402+129.9400/+30.9498+129.9200/+30.9600+129.9071/+30.9653+129.9000/+30.9800+129.8806/+30.9805+129.8800/+30.9942+129.8600/+31.0000+129.8545/+31.0187+129.8400/+31.0200+129.8380/+31.0368+129.8200/+31.0400+129.8164/+31.0600+129.8086/+31.0698+129.8200/ 北西 50 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8144+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7920+130.2800/+30.8000+130.2702/+30.8144+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T06:00:00+09:00 2026-08-21T09:00:00+09:00 降灰 70 +31.1060+129.8200/+31.1102+129.8400/+31.1056+129.8600/+31.1000+129.8682/+31.0921+129.8800/+31.0865+129.9000/+31.0800+129.9090/+31.0740+129.9200/+31.0644+129.9400/+31.0600+129.9481/+31.0528+129.9600/+31.0400+129.9748/+31.0375+129.9800/+31.0205+130.0000/+31.0200+130.0005/+31.0112+130.0200/+31.0000+130.0344/+30.9965+130.0400/+30.9876+130.0600/+30.9800+130.0663/+30.9600+130.0793/+30.9596+130.0800/+30.9512+130.1000/+30.9400+130.1126/+30.9375+130.1200/+30.9202+130.1400/+30.9200+130.1402/+30.9147+130.1600/+30.9000+130.1761/+30.8990+130.1800/+30.8909+130.2000/+30.8800+130.2110/+30.8785+130.2200/+30.8600+130.2392/+30.8599+130.2400/+30.8586+130.2600/+30.8400+130.2787/+30.8399+130.2800/+30.8393+130.3000/+30.8200+130.3193/+30.8154+130.3200/+30.8000+130.3354/+30.7800+130.3233/+30.7767+130.3200/+30.7605+130.3000/+30.7644+130.2800/+30.7800+130.2644/+30.7801+130.2600/+30.7817+130.2400/+30.8000+130.2215/+30.8003+130.2200/+30.8021+130.2000/+30.8200+130.1803/+30.8201+130.1800/+30.8226+130.1600/+30.8345+130.1400/+30.8400+130.1336/+30.8432+130.1200/+30.8521+130.1000/+30.8600+130.0904/+30.8648+130.0800/+30.8760+130.0600/+30.8800+130.0549/+30.8888+130.0400/+30.9000+130.0254/+30.9026+130.0200/+30.9080+130.0000/+30.9200+129.9832/+30.9230+129.9800/+30.9373+129.9600/+30.9400+129.9567/+30.9556+129.9400/+30.9600+129.9348/+30.9711+129.9200/+30.9800+129.9066/+30.9861+129.9000/+31.0000+129.8893/+31.0092+129.8800/+31.0200+129.8611/+31.0212+129.8600/+31.0400+129.8413/+31.0425+129.8400/+31.0600+129.8313/+31.0800+129.8257/+31.0897+129.8200/+31.1000+129.8067/+31.1060+129.8200/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8151+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7916+130.2800/+30.8000+130.2704/+30.8151+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T09:00:00+09:00 2026-08-21T12:00:00+09:00 降灰 70 +31.0946+129.8000/+31.0835+129.8200/+31.0826+129.8400/+31.0800+129.8492/+31.0775+129.8600/+31.0677+129.8800/+31.0600+129.8949/+31.0581+129.9000/+31.0476+129.9200/+31.0400+129.9297/+31.0349+129.9400/+31.0269+129.9600/+31.0200+129.9669/+31.0097+129.9800/+31.0000+129.9984/+30.9993+130.0000/+30.9908+130.0200/+30.9800+130.0391/+30.9796+130.0400/+30.9600+130.0574/+30.9584+130.0600/+30.9466+130.0800/+30.9400+130.0874/+30.9356+130.1000/+30.9213+130.1200/+30.9200+130.1213/+30.9146+130.1400/+30.9000+130.1579/+30.8995+130.1600/+30.8952+130.1800/+30.8800+130.1963/+30.8793+130.2000/+30.8747+130.2200/+30.8600+130.2351/+30.8596+130.2400/+30.8555+130.2600/+30.8400+130.2757/+30.8399+130.2800/+30.8387+130.3000/+30.8200+130.3187/+30.8137+130.3200/+30.8000+130.3337/+30.7805+130.3200/+30.7800+130.3200/+30.7604+130.3000/+30.7624+130.2800/+30.7800+130.2624/+30.7801+130.2600/+30.7805+130.2400/+30.7894+130.2200/+30.8000+130.2093/+30.8006+130.2000/+30.8029+130.1800/+30.8200+130.1603/+30.8201+130.1600/+30.8220+130.1400/+30.8284+130.1200/+30.8400+130.1051/+30.8413+130.1000/+30.8466+130.0800/+30.8600+130.0603/+30.8601+130.0600/+30.8663+130.0400/+30.8799+130.0200/+30.8800+130.0178/+30.8806+130.0000/+30.8980+129.9800/+30.9000+129.9773/+30.9082+129.9600/+30.9200+129.9422/+30.9220+129.9400/+30.9352+129.9200/+30.9400+129.9106/+30.9474+129.9000/+30.9600+129.8884/+30.9686+129.8800/+30.9800+129.8641/+30.9837+129.8600/+31.0000+129.8462/+31.0094+129.8400/+31.0200+129.8269/+31.0272+129.8200/+31.0400+129.8066/+31.0528+129.8000/+31.0600+129.7954/+31.0800+129.7970/+31.0946+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8150+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7898+130.2800/+30.8000+130.2677/+30.8150+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T12:00:00+09:00 2026-08-21T15:00:00+09:00 降灰 70 +31.1012+129.8000/+31.1000+129.8017/+31.0800+129.8132/+31.0785+129.8200/+31.0769+129.8400/+31.0716+129.8600/+31.0628+129.8800/+31.0600+129.8851/+31.0541+129.9000/+31.0400+129.9181/+31.0390+129.9200/+31.0289+129.9400/+31.0200+129.9581/+31.0191+129.9600/+31.0033+129.9800/+31.0000+129.9852/+30.9924+130.0000/+30.9815+130.0200/+30.9800+130.0226/+30.9704+130.0400/+30.9600+130.0472/+30.9489+130.0600/+30.9400+130.0706/+30.9361+130.0800/+30.9201+130.1000/+30.9200+130.1001/+30.9156+130.1200/+30.9000+130.1397/+30.8999+130.1400/+30.8955+130.1600/+30.8800+130.1778/+30.8796+130.1800/+30.8771+130.2000/+30.8600+130.2181/+30.8598+130.2200/+30.8588+130.2400/+30.8400+130.2595/+30.8400+130.2600/+30.8398+130.2800/+30.8365+130.3000/+30.8200+130.3165/+30.8106+130.3200/+30.8000+130.3306/+30.7841+130.3200/+30.7800+130.3199/+30.7604+130.3000/+30.7614+130.2800/+30.7800+130.2614/+30.7801+130.2600/+30.7803+130.2400/+30.7848+130.2200/+30.8000+130.2045/+30.8004+130.2000/+30.8016+130.1800/+30.8115+130.1600/+30.8200+130.1508/+30.8211+130.1400/+30.8248+130.1200/+30.8400+130.1008/+30.8402+130.1000/+30.8435+130.0800/+30.8546+130.0600/+30.8600+130.0534/+30.8645+130.0400/+30.8752+130.0200/+30.8752+130.0000/+30.8800+129.9925/+30.8885+129.9800/+30.9000+129.9651/+30.9026+129.9600/+30.9135+129.9400/+30.9200+129.9316/+30.9306+129.9200/+30.9400+129.9022/+30.9417+129.9000/+30.9600+129.8837/+30.9640+129.8800/+30.9754+129.8600/+30.9800+129.8543/+30.9962+129.8400/+31.0000+129.8356/+31.0200+129.8251/+31.0285+129.8200/+31.0400+129.8100/+31.0559+129.8000/+31.0600+129.7976/+31.0800+129.7977/+31.1000+129.7978/+31.1012+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8144+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7898+130.2800/+30.8000+130.2672/+30.8144+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T15:00:00+09:00 2026-08-21T18:00:00+09:00 降灰 70 +31.0829+129.8400/+31.0800+129.8541/+31.0791+129.8600/+31.0715+129.8800/+31.0630+129.9000/+31.0600+129.9038/+31.0509+129.9200/+31.0400+129.9332/+31.0360+129.9400/+31.0260+129.9600/+31.0200+129.9659/+31.0101+129.9800/+31.0000+129.9974/+30.9987+130.0000/+30.9890+130.0200/+30.9800+130.0321/+30.9745+130.0400/+30.9600+130.0509/+30.9555+130.0600/+30.9410+130.0800/+30.9400+130.0811/+30.9310+130.1000/+30.9200+130.1132/+30.9181+130.1200/+30.9091+130.1400/+30.9000+130.1503/+30.8981+130.1600/+30.8867+130.1800/+30.8800+130.1869/+30.8784+130.2000/+30.8644+130.2200/+30.8600+130.2245/+30.8593+130.2400/+30.8479+130.2600/+30.8400+130.2678/+30.8399+130.2800/+30.8374+130.3000/+30.8200+130.3174/+30.8132+130.3200/+30.8000+130.3332/+30.7808+130.3200/+30.7800+130.3200/+30.7604+130.3000/+30.7617+130.2800/+30.7800+130.2617/+30.7801+130.2600/+30.7805+130.2400/+30.7919+130.2200/+30.8000+130.2119/+30.8006+130.2000/+30.8032+130.1800/+30.8200+130.1618/+30.8204+130.1600/+30.8223+130.1400/+30.8298+130.1200/+30.8400+130.1077/+30.8419+130.1000/+30.8488+130.0800/+30.8600+130.0666/+30.8625+130.0600/+30.8685+130.0400/+30.8800+130.0244/+30.8821+130.0200/+30.8836+130.0000/+30.9000+129.9835/+30.9022+129.9800/+30.9101+129.9600/+30.9200+129.9451/+30.9250+129.9400/+30.9400+129.9201/+30.9401+129.9200/+30.9531+129.9000/+30.9600+129.8935/+30.9720+129.8800/+30.9800+129.8679/+30.9873+129.8600/+31.0000+129.8503/+31.0175+129.8400/+31.0200+129.8368/+31.0394+129.8200/+31.0400+129.8195/+31.0600+129.8116/+31.0760+129.8200/+31.0800+129.8273/+31.0829+129.8400/ 北西 50 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8137+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7901+130.2800/+30.8000+130.2679/+30.8137+130.2800/ 北西 3 鹿児島県三島村 4630300 　現在、薩摩硫黄島は噴火警戒レベル２（火口周辺規制）です。薩摩硫黄島で噴火が発生した場合には、２１日０９時から１２時までは火口から北西方向に降灰が予想されます。 　２１日０時から２１日１８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 　２１日００時から０３時まで　北西　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２１日０３時から０６時まで　北西　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　２１日０６時から０９時まで　北西　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２１日０９時から１２時まで　北西　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２１日１２時から１５時まで　北西　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２１日１５時から１８時まで　北西　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　 　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：三島村 　 　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。