2026-08-20T11:00:00Z 通常 気象庁本庁 気象庁 2026-08-20T20:00:00+09:00 2026-08-20T21:00:00+09:00 2026-08-21T15:00:00+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、２０日２１時から２４時までは火口から北西方向、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 2026-08-20T21:00:00+09:00 2026-08-21T00:00:00+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 +30.8150+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7890+130.2800/+30.8000+130.2665/+30.8150+130.2800/ 北西 3 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 +31.0611+129.7800/+31.0662+129.8000/+31.0612+129.8200/+31.0600+129.8250/+31.0551+129.8400/+31.0469+129.8600/+31.0400+129.8697/+31.0368+129.8800/+31.0309+129.9000/+31.0266+129.9200/+31.0200+129.9380/+31.0191+129.9400/+31.0046+129.9600/+31.0000+129.9646/+30.9943+129.9800/+30.9875+130.0000/+30.9800+130.0148/+30.9779+130.0200/+30.9600+130.0386/+30.9595+130.0400/+30.9486+130.0600/+30.9400+130.0696/+30.9368+130.0800/+30.9245+130.1000/+30.9200+130.1049/+30.9172+130.1200/+30.9048+130.1400/+30.9000+130.1452/+30.8982+130.1600/+30.8851+130.1800/+30.8800+130.1852/+30.8788+130.2000/+30.8664+130.2200/+30.8600+130.2264/+30.8595+130.2400/+30.8534+130.2600/+30.8400+130.2734/+30.8399+130.2800/+30.8388+130.3000/+30.8200+130.3188/+30.8140+130.3200/+30.8000+130.3340/+30.7800+130.3212/+30.7788+130.3200/+30.7604+130.3000/+30.7630+130.2800/+30.7800+130.2630/+30.7801+130.2600/+30.7811+130.2400/+30.8000+130.2208/+30.8002+130.2200/+30.8012+130.2000/+30.8121+130.1800/+30.8200+130.1716/+30.8213+130.1600/+30.8265+130.1400/+30.8400+130.1247/+30.8410+130.1200/+30.8457+130.1000/+30.8600+130.0811/+30.8603+130.0800/+30.8643+130.0600/+30.8784+130.0400/+30.8800+130.0377/+30.8847+130.0200/+30.8845+130.0000/+30.9000+129.9852/+30.9030+129.9800/+30.9100+129.9600/+30.9200+129.9432/+30.9221+129.9400/+30.9310+129.9200/+30.9395+129.9000/+30.9400+129.8991/+30.9600+129.8803/+30.9603+129.8800/+30.9706+129.8600/+30.9800+129.8445/+30.9830+129.8400/+30.9959+129.8200/+31.0000+129.8161/+31.0200+129.8076/+31.0266+129.8000/+31.0400+129.7802/+31.0424+129.7800/+31.0600+129.7773/+31.0611+129.7800/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8123+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7920+130.2800/+30.8000+130.2703/+30.8123+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 +31.0874+129.8400/+31.0865+129.8600/+31.0817+129.8800/+31.0800+129.8963/+31.0797+129.9000/+31.0674+129.9200/+31.0600+129.9360/+31.0576+129.9400/+31.0408+129.9600/+31.0400+129.9609/+31.0324+129.9800/+31.0200+129.9950/+31.0174+130.0000/+31.0080+130.0200/+31.0000+130.0301/+30.9942+130.0400/+30.9847+130.0600/+30.9800+130.0641/+30.9600+130.0776/+30.9589+130.0800/+30.9499+130.1000/+30.9400+130.1107/+30.9368+130.1200/+30.9200+130.1398/+30.9199+130.1400/+30.9144+130.1600/+30.9000+130.1756/+30.8990+130.1800/+30.8908+130.2000/+30.8800+130.2109/+30.8785+130.2200/+30.8600+130.2392/+30.8599+130.2400/+30.8587+130.2600/+30.8400+130.2788/+30.8399+130.2800/+30.8394+130.3000/+30.8200+130.3194/+30.8154+130.3200/+30.8000+130.3354/+30.7800+130.3237/+30.7763+130.3200/+30.7605+130.3000/+30.7648+130.2800/+30.7800+130.2648/+30.7801+130.2600/+30.7825+130.2400/+30.8000+130.2224/+30.8004+130.2200/+30.8033+130.2000/+30.8200+130.1823/+30.8205+130.1800/+30.8240+130.1600/+30.8400+130.1412/+30.8404+130.1400/+30.8453+130.1200/+30.8600+130.1010/+30.8604+130.1000/+30.8667+130.0800/+30.8800+130.0634/+30.8816+130.0600/+30.8916+130.0400/+30.9000+130.0297/+30.9040+130.0200/+30.9084+130.0000/+30.9200+129.9825/+30.9223+129.9800/+30.9363+129.9600/+30.9400+129.9554/+30.9527+129.9400/+30.9600+129.9311/+30.9685+129.9200/+30.9800+129.9008/+30.9806+129.9000/+31.0000+129.8830/+31.0038+129.8800/+31.0181+129.8600/+31.0200+129.8576/+31.0399+129.8400/+31.0400+129.8399/+31.0600+129.8315/+31.0800+129.8354/+31.0874+129.8400/ 北西 50 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8147+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7921+130.2800/+30.8000+130.2706/+30.8147+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 +31.1090+129.8400/+31.1065+129.8600/+31.1000+129.8717/+31.0937+129.8800/+31.0881+129.9000/+31.0800+129.9100/+31.0750+129.9200/+31.0651+129.9400/+31.0600+129.9494/+31.0540+129.9600/+31.0400+129.9767/+31.0385+129.9800/+31.0217+130.0000/+31.0200+130.0017/+31.0113+130.0200/+31.0000+130.0357/+30.9976+130.0400/+30.9892+130.0600/+30.9800+130.0675/+30.9653+130.0800/+30.9600+130.0858/+30.9524+130.1000/+30.9400+130.1131/+30.9370+130.1200/+30.9209+130.1400/+30.9200+130.1409/+30.9145+130.1600/+30.9000+130.1758/+30.8989+130.1800/+30.8902+130.2000/+30.8800+130.2103/+30.8784+130.2200/+30.8600+130.2392/+30.8599+130.2400/+30.8584+130.2600/+30.8400+130.2784/+30.8399+130.2800/+30.8392+130.3000/+30.8200+130.3192/+30.8160+130.3200/+30.8000+130.3360/+30.7800+130.3256/+30.7744+130.3200/+30.7605+130.3000/+30.7636+130.2800/+30.7800+130.2636/+30.7801+130.2600/+30.7814+130.2400/+30.8000+130.2211/+30.8002+130.2200/+30.8017+130.2000/+30.8184+130.1800/+30.8200+130.1783/+30.8220+130.1600/+30.8308+130.1400/+30.8400+130.1294/+30.8424+130.1200/+30.8515+130.1000/+30.8600+130.0890/+30.8633+130.0800/+30.8749+130.0600/+30.8800+130.0528/+30.8854+130.0400/+30.9000+130.0219/+30.9013+130.0200/+30.9076+130.0000/+30.9200+129.9842/+30.9243+129.9800/+30.9370+129.9600/+30.9400+129.9559/+30.9526+129.9400/+30.9600+129.9327/+30.9723+129.9200/+30.9800+129.9086/+30.9882+129.9000/+31.0000+129.8914/+31.0155+129.8800/+31.0200+129.8738/+31.0347+129.8600/+31.0400+129.8541/+31.0600+129.8416/+31.0647+129.8400/+31.0800+129.8339/+31.1000+129.8203/+31.1090+129.8400/ 北西 60 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/+30.7919+130.2800/+30.8000+130.2706/+30.8137+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 +31.0661+129.7800/+31.0713+129.8000/+31.0658+129.8200/+31.0614+129.8400/+31.0600+129.8435/+31.0527+129.8600/+31.0448+129.8800/+31.0400+129.8859/+31.0329+129.9000/+31.0251+129.9200/+31.0200+129.9336/+31.0170+129.9400/+31.0031+129.9600/+31.0000+129.9636/+30.9943+129.9800/+30.9865+130.0000/+30.9800+130.0135/+30.9777+130.0200/+30.9636+130.0400/+30.9600+130.0427/+30.9471+130.0600/+30.9400+130.0687/+30.9364+130.0800/+30.9237+130.1000/+30.9200+130.1042/+30.9164+130.1200/+30.9048+130.1400/+30.9000+130.1451/+30.8971+130.1600/+30.8809+130.1800/+30.8800+130.1809/+30.8782+130.2000/+30.8602+130.2200/+30.8600+130.2202/+30.8592+130.2400/+30.8474+130.2600/+30.8400+130.2674/+30.8399+130.2800/+30.8377+130.3000/+30.8200+130.3177/+30.8120+130.3200/+30.8000+130.3320/+30.7824+130.3200/+30.7800+130.3199/+30.7604+130.3000/+30.7620+130.2800/+30.7800+130.2620/+30.7801+130.2600/+30.7804+130.2400/+30.7901+130.2200/+30.8000+130.2100/+30.8005+130.2000/+30.8027+130.1800/+30.8200+130.1606/+30.8201+130.1600/+30.8218+130.1400/+30.8279+130.1200/+30.8400+130.1049/+30.8409+130.1000/+30.8446+130.0800/+30.8597+130.0600/+30.8600+130.0597/+30.8655+130.0400/+30.8762+130.0200/+30.8743+130.0000/+30.8800+129.9908/+30.8870+129.9800/+30.9000+129.9631/+30.9014+129.9600/+30.9101+129.9400/+30.9200+129.9242/+30.9234+129.9200/+30.9320+129.9000/+30.9400+129.8868/+30.9452+129.8800/+30.9593+129.8600/+30.9600+129.8594/+30.9769+129.8400/+30.9800+129.8337/+30.9898+129.8200/+31.0000+129.8108/+31.0197+129.8000/+31.0200+129.7997/+31.0365+129.7800/+31.0400+129.7754/+31.0600+129.7696/+31.0661+129.7800/ 北西 60 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/+30.7900+130.2800/+30.8000+130.2674/+30.8137+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 +31.0765+129.8200/+31.0800+129.8400/+31.0755+129.8600/+31.0657+129.8800/+31.0600+129.8908/+31.0562+129.9000/+31.0400+129.9181/+31.0389+129.9200/+31.0300+129.9400/+31.0221+129.9600/+31.0200+129.9620/+31.0064+129.9800/+31.0000+129.9915/+30.9956+130.0000/+30.9839+130.0200/+30.9800+130.0252/+30.9688+130.0400/+30.9600+130.0464/+30.9524+130.0600/+30.9400+130.0739/+30.9369+130.0800/+30.9265+130.1000/+30.9200+130.1076/+30.9166+130.1200/+30.9024+130.1400/+30.9000+130.1425/+30.8967+130.1600/+30.8800+130.1792/+30.8798+130.1800/+30.8776+130.2000/+30.8600+130.2189/+30.8599+130.2200/+30.8590+130.2400/+30.8400+130.2598/+30.8400+130.2600/+30.8398+130.2800/+30.8367+130.3000/+30.8200+130.3167/+30.8099+130.3200/+30.8000+130.3299/+30.7852+130.3200/+30.7800+130.3199/+30.7604+130.3000/+30.7616+130.2800/+30.7800+130.2616/+30.7801+130.2600/+30.7804+130.2400/+30.7882+130.2200/+30.8000+130.2081/+30.8005+130.2000/+30.8022+130.1800/+30.8200+130.1604/+30.8201+130.1600/+30.8217+130.1400/+30.8268+130.1200/+30.8400+130.1036/+30.8410+130.1000/+30.8459+130.0800/+30.8600+130.0620/+30.8608+130.0600/+30.8665+130.0400/+30.8800+130.0205/+30.8802+130.0200/+30.8800+130.0110/+30.8788+130.0000/+30.8800+129.9985/+30.9000+129.9809/+30.9007+129.9800/+30.9065+129.9600/+30.9166+129.9400/+30.9200+129.9355/+30.9337+129.9200/+30.9400+129.9078/+30.9457+129.9000/+30.9600+129.8874/+30.9684+129.8800/+30.9800+129.8608/+30.9806+129.8600/+30.9996+129.8400/+31.0000+129.8395/+31.0200+129.8277/+31.0316+129.8200/+31.0400+129.8131/+31.0600+129.8049/+31.0765+129.8200/ 北西 50 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/+30.7884+130.2800/+30.8000+130.2660/+30.8150+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、２０日２１時から２４時までは火口から北西方向、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。 　２０日２１時から２１日１５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２１時から２４時まで　北西　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　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　　　　　　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。