2026-08-20T17:00:00Z 通常 気象庁本庁 気象庁 2026-08-21T02:00:00+09:00 2026-08-21T03:00:00+09:00 2026-08-21T21:00:00+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 2026-08-21T03:00:00+09:00 2026-08-21T06:00:00+09:00 降灰 70 +31.1014+129.8000/+31.1000+129.8024/+31.0902+129.8000/+31.1000+129.7948/+31.1014+129.8000/ +31.0808+129.8400/+31.0800+129.8432/+31.0768+129.8600/+31.0685+129.8800/+31.0600+129.8957/+31.0583+129.9000/+31.0489+129.9200/+31.0400+129.9313/+31.0363+129.9400/+31.0303+129.9600/+31.0200+129.9712/+31.0141+129.9800/+31.0052+130.0000/+31.0000+130.0079/+30.9944+130.0200/+30.9838+130.0400/+30.9800+130.0467/+30.9600+130.0590/+30.9595+130.0600/+30.9530+130.0800/+30.9400+130.0947/+30.9383+130.1000/+30.9300+130.1200/+30.9200+130.1308/+30.9175+130.1400/+30.9040+130.1600/+30.9000+130.1641/+30.8974+130.1800/+30.8800+130.1986/+30.8797+130.2000/+30.8775+130.2200/+30.8600+130.2378/+30.8598+130.2400/+30.8582+130.2600/+30.8400+130.2782/+30.8399+130.2800/+30.8392+130.3000/+30.8200+130.3192/+30.8140+130.3200/+30.8000+130.3340/+30.7801+130.3200/+30.7800+130.3200/+30.7605+130.3000/+30.7645+130.2800/+30.7800+130.2645/+30.7801+130.2600/+30.7827+130.2400/+30.8000+130.2227/+30.8004+130.2200/+30.8032+130.2000/+30.8200+130.1826/+30.8206+130.1800/+30.8235+130.1600/+30.8400+130.1411/+30.8404+130.1400/+30.8447+130.1200/+30.8600+130.1022/+30.8608+130.1000/+30.8656+130.0800/+30.8800+130.0609/+30.8804+130.0600/+30.8865+130.0400/+30.9000+130.0210/+30.9005+130.0200/+30.9040+130.0000/+30.9161+129.9800/+30.9200+129.9726/+30.9264+129.9600/+30.9400+129.9405/+30.9404+129.9400/+30.9549+129.9200/+30.9600+129.9136/+30.9681+129.9000/+30.9800+129.8846/+30.9843+129.8800/+30.9978+129.8600/+31.0000+129.8576/+31.0176+129.8400/+31.0200+129.8365/+31.0355+129.8200/+31.0400+129.8154/+31.0600+129.8062/+31.0794+129.8200/+31.0800+129.8250/+31.0808+129.8400/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8131+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7917+130.2800/+30.8000+130.2702/+30.8131+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 +31.1045+129.8200/+31.1118+129.8400/+31.1076+129.8600/+31.1000+129.8714/+31.0943+129.8800/+31.0889+129.9000/+31.0800+129.9125/+31.0765+129.9200/+31.0666+129.9400/+31.0600+129.9510/+31.0538+129.9600/+31.0400+129.9766/+31.0384+129.9800/+31.0236+130.0000/+31.0200+130.0042/+31.0135+130.0200/+31.0000+130.0394/+30.9997+130.0400/+30.9913+130.0600/+30.9800+130.0690/+30.9634+130.0800/+30.9600+130.0835/+30.9527+130.1000/+30.9400+130.1140/+30.9378+130.1200/+30.9213+130.1400/+30.9200+130.1414/+30.9157+130.1600/+30.9000+130.1763/+30.8990+130.1800/+30.8897+130.2000/+30.8800+130.2097/+30.8787+130.2200/+30.8600+130.2394/+30.8599+130.2400/+30.8588+130.2600/+30.8400+130.2788/+30.8399+130.2800/+30.8393+130.3000/+30.8200+130.3193/+30.8151+130.3200/+30.8000+130.3351/+30.7800+130.3227/+30.7773+130.3200/+30.7605+130.3000/+30.7650+130.2800/+30.7800+130.2650/+30.7801+130.2600/+30.7827+130.2400/+30.8000+130.2227/+30.8004+130.2200/+30.8035+130.2000/+30.8200+130.1828/+30.8207+130.1800/+30.8245+130.1600/+30.8400+130.1426/+30.8408+130.1400/+30.8460+130.1200/+30.8600+130.1037/+30.8618+130.1000/+30.8695+130.0800/+30.8800+130.0665/+30.8831+130.0600/+30.8942+130.0400/+30.9000+130.0330/+30.9058+130.0200/+30.9141+130.0000/+30.9200+129.9924/+30.9311+129.9800/+30.9400+129.9676/+30.9462+129.9600/+30.9600+129.9469/+30.9662+129.9400/+30.9799+129.9200/+30.9800+129.9198/+30.9969+129.9000/+31.0000+129.8978/+31.0170+129.8800/+31.0200+129.8744/+31.0321+129.8600/+31.0400+129.8498/+31.0562+129.8400/+31.0600+129.8376/+31.0800+129.8309/+31.0954+129.8200/+31.1000+129.8144/+31.1045+129.8200/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8156+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7905+130.2800/+30.8000+130.2694/+30.8156+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 +31.1053+129.8000/+31.1000+129.8126/+31.0916+129.8200/+31.0882+129.8400/+31.0832+129.8600/+31.0800+129.8679/+31.0758+129.8800/+31.0689+129.9000/+31.0600+129.9154/+31.0581+129.9200/+31.0448+129.9400/+31.0400+129.9449/+31.0337+129.9600/+31.0200+129.9761/+31.0177+129.9800/+31.0089+130.0000/+31.0000+130.0142/+30.9970+130.0200/+30.9866+130.0400/+30.9800+130.0510/+30.9689+130.0600/+30.9600+130.0649/+30.9540+130.0800/+30.9400+130.0978/+30.9393+130.1000/+30.9313+130.1200/+30.9200+130.1326/+30.9176+130.1400/+30.9063+130.1600/+30.9000+130.1667/+30.8973+130.1800/+30.8800+130.1991/+30.8798+130.2000/+30.8767+130.2200/+30.8600+130.2373/+30.8597+130.2400/+30.8574+130.2600/+30.8400+130.2772/+30.8399+130.2800/+30.8388+130.3000/+30.8200+130.3188/+30.8139+130.3200/+30.8000+130.3339/+30.7804+130.3200/+30.7800+130.3200/+30.7605+130.3000/+30.7631+130.2800/+30.7800+130.2631/+30.7801+130.2600/+30.7809+130.2400/+30.8000+130.2206/+30.8001+130.2200/+30.8010+130.2000/+30.8085+130.1800/+30.8200+130.1680/+30.8212+130.1600/+30.8256+130.1400/+30.8400+130.1231/+30.8410+130.1200/+30.8458+130.1000/+30.8600+130.0800/+30.8666+130.0600/+30.8800+130.0414/+30.8806+130.0400/+30.8897+130.0200/+30.8993+130.0000/+30.9000+129.9993/+30.9097+129.9800/+30.9200+129.9604/+30.9203+129.9600/+30.9350+129.9400/+30.9400+129.9324/+30.9505+129.9200/+30.9600+129.9086/+30.9667+129.9000/+30.9800+129.8847/+30.9846+129.8800/+31.0000+129.8613/+31.0013+129.8600/+31.0198+129.8400/+31.0200+129.8397/+31.0359+129.8200/+31.0400+129.8157/+31.0600+129.8055/+31.0781+129.8000/+31.0800+129.7994/+31.1000+129.7909/+31.1053+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8158+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7905+130.2800/+30.8000+130.2683/+30.8158+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 +31.1075+129.8000/+31.1021+129.8200/+31.1000+129.8300/+31.0961+129.8400/+31.0861+129.8600/+31.0800+129.8705/+31.0761+129.8800/+31.0690+129.9000/+31.0600+129.9134/+31.0574+129.9200/+31.0435+129.9400/+31.0400+129.9433/+31.0317+129.9600/+31.0200+129.9713/+31.0135+129.9800/+31.0020+130.0000/+31.0000+130.0028/+30.9916+130.0200/+30.9800+130.0387/+30.9794+130.0400/+30.9600+130.0572/+30.9581+130.0600/+30.9400+130.0796/+30.9398+130.0800/+30.9339+130.1000/+30.9200+130.1162/+30.9186+130.1200/+30.9114+130.1400/+30.9000+130.1525/+30.8984+130.1600/+30.8901+130.1800/+30.8800+130.1903/+30.8786+130.2000/+30.8661+130.2200/+30.8600+130.2263/+30.8594+130.2400/+30.8491+130.2600/+30.8400+130.2692/+30.8399+130.2800/+30.8376+130.3000/+30.8200+130.3176/+30.8128+130.3200/+30.8000+130.3327/+30.7812+130.3200/+30.7800+130.3200/+30.7604+130.3000/+30.7620+130.2800/+30.7800+130.2620/+30.7801+130.2600/+30.7805+130.2400/+30.7991+130.2200/+30.8000+130.2191/+30.8006+130.2000/+30.8044+130.1800/+30.8200+130.1632/+30.8205+130.1600/+30.8229+130.1400/+30.8370+130.1200/+30.8400+130.1167/+30.8428+130.1000/+30.8517+130.0800/+30.8600+130.0693/+30.8625+130.0600/+30.8733+130.0400/+30.8800+130.0307/+30.8838+130.0200/+30.8860+130.0000/+30.9000+129.9871/+30.9054+129.9800/+30.9147+129.9600/+30.9200+129.9520/+30.9294+129.9400/+30.9400+129.9221/+30.9414+129.9200/+30.9578+129.9000/+30.9600+129.8984/+30.9800+129.8810/+30.9811+129.8800/+30.9993+129.8600/+31.0000+129.8594/+31.0200+129.8446/+31.0266+129.8400/+31.0400+129.8266/+31.0545+129.8200/+31.0600+129.8169/+31.0800+129.8125/+31.0878+129.8000/+31.1000+129.7918/+31.1075+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8139+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7898+130.2800/+30.8000+130.2675/+30.8139+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 +31.0810+129.8400/+31.0800+129.8484/+31.0793+129.8600/+31.0726+129.8800/+31.0666+129.9000/+31.0600+129.9124/+31.0576+129.9200/+31.0417+129.9400/+31.0400+129.9414/+31.0303+129.9600/+31.0200+129.9709/+31.0136+129.9800/+31.0029+130.0000/+31.0000+130.0043/+30.9927+130.0200/+30.9800+130.0389/+30.9794+130.0400/+30.9600+130.0589/+30.9595+130.0600/+30.9459+130.0800/+30.9400+130.0861/+30.9343+130.1000/+30.9200+130.1168/+30.9190+130.1200/+30.9120+130.1400/+30.9000+130.1539/+30.8986+130.1600/+30.8890+130.1800/+30.8800+130.1894/+30.8787+130.2000/+30.8658+130.2200/+30.8600+130.2259/+30.8593+130.2400/+30.8483+130.2600/+30.8400+130.2682/+30.8399+130.2800/+30.8372+130.3000/+30.8200+130.3172/+30.8146+130.3200/+30.8000+130.3346/+30.7800+130.3226/+30.7774+130.3200/+30.7604+130.3000/+30.7618+130.2800/+30.7800+130.2618/+30.7801+130.2600/+30.7806+130.2400/+30.8000+130.2200/+30.8007+130.2000/+30.8047+130.1800/+30.8200+130.1636/+30.8206+130.1600/+30.8233+130.1400/+30.8389+130.1200/+30.8400+130.1188/+30.8433+130.1000/+30.8552+130.0800/+30.8600+130.0745/+30.8652+130.0600/+30.8794+130.0400/+30.8800+130.0392/+30.8862+130.0200/+30.8912+130.0000/+30.9000+129.9920/+30.9077+129.9800/+30.9188+129.9600/+30.9200+129.9582/+30.9358+129.9400/+30.9400+129.9341/+30.9536+129.9200/+30.9600+129.9122/+30.9682+129.9000/+30.9800+129.8859/+30.9859+129.8800/+31.0000+129.8643/+31.0078+129.8600/+31.0200+129.8513/+31.0357+129.8400/+31.0400+129.8358/+31.0600+129.8282/+31.0800+129.8386/+31.0810+129.8400/ 北西 50 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8117+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7912+130.2800/+30.8000+130.2694/+30.8117+130.2800/ 北西 3 鹿児島県三島村 4630300 2026-08-21T18:00:00+09:00 2026-08-21T21:00:00+09:00 降灰 70 +31.0814+129.8400/+31.0800+129.8471/+31.0781+129.8600/+31.0718+129.8800/+31.0646+129.9000/+31.0600+129.9071/+31.0543+129.9200/+31.0400+129.9387/+31.0393+129.9400/+31.0304+129.9600/+31.0200+129.9705/+31.0136+129.9800/+31.0044+130.0000/+31.0000+130.0068/+30.9943+130.0200/+30.9824+130.0400/+30.9800+130.0441/+30.9600+130.0587/+30.9593+130.0600/+30.9501+130.0800/+30.9400+130.0920/+30.9372+130.1000/+30.9216+130.1200/+30.9200+130.1217/+30.9158+130.1400/+30.9000+130.1578/+30.8995+130.1600/+30.8952+130.1800/+30.8800+130.1961/+30.8794+130.2000/+30.8751+130.2200/+30.8600+130.2352/+30.8597+130.2400/+30.8561+130.2600/+30.8400+130.2761/+30.8399+130.2800/+30.8387+130.3000/+30.8200+130.3187/+30.8153+130.3200/+30.8000+130.3353/+30.7800+130.3248/+30.7752+130.3200/+30.7604+130.3000/+30.7629+130.2800/+30.7800+130.2629/+30.7801+130.2600/+30.7814+130.2400/+30.8000+130.2211/+30.8002+130.2200/+30.8016+130.2000/+30.8188+130.1800/+30.8200+130.1787/+30.8219+130.1600/+30.8295+130.1400/+30.8400+130.1279/+30.8421+130.1200/+30.8507+130.1000/+30.8600+130.0890/+30.8628+130.0800/+30.8727+130.0600/+30.8800+130.0504/+30.8839+130.0400/+30.8982+130.0200/+30.9000+130.0148/+30.9020+130.0000/+30.9114+129.9800/+30.9200+129.9654/+30.9241+129.9600/+30.9400+129.9404/+30.9403+129.9400/+30.9504+129.9200/+30.9600+129.9079/+30.9652+129.9000/+30.9800+129.8808/+30.9807+129.8800/+30.9938+129.8600/+31.0000+129.8539/+31.0176+129.8400/+31.0200+129.8366/+31.0354+129.8200/+31.0400+129.8151/+31.0600+129.8057/+31.0790+129.8200/+31.0800+129.8251/+31.0814+129.8400/ 北西 50 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8117+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7921+130.2800/+30.8000+130.2704/+30.8117+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３時から２１日２１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０３時から０６時まで　北西　　　　　　６０ｋｍ　　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　　　　　 　２１日１８時から２１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。