2026-08-20T08:00:00Z 通常 気象庁本庁 気象庁 2026-08-20T17:00:00+09:00 2026-08-20T18:00:00+09:00 2026-08-21T12:00:00+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 2026-08-20T18:00:00+09:00 2026-08-20T21:00:00+09:00 降灰 70 +31.0214+129.7800/+31.0233+129.8000/+31.0200+129.8113/+31.0173+129.8200/+31.0122+129.8400/+31.0000+129.8567/+30.9983+129.8600/+30.9906+129.8800/+30.9857+129.9000/+30.9805+129.9200/+30.9800+129.9216/+30.9697+129.9400/+30.9600+129.9488/+30.9570+129.9600/+30.9507+129.9800/+30.9444+130.0000/+30.9400+130.0091/+30.9371+130.0200/+30.9200+130.0354/+30.9175+130.0400/+30.9134+130.0600/+30.9000+130.0791/+30.8998+130.0800/+30.8969+130.1000/+30.8892+130.1200/+30.8800+130.1313/+30.8792+130.1400/+30.8769+130.1600/+30.8653+130.1800/+30.8600+130.1856/+30.8595+130.2000/+30.8583+130.2200/+30.8400+130.2398/+30.8400+130.2400/+30.8399+130.2600/+30.8396+130.2800/+30.8200+130.3000/+30.8071+130.3200/+30.8000+130.3271/+30.7883+130.3200/+30.7800+130.3199/+30.7603+130.3000/+30.7606+130.2800/+30.7800+130.2605/+30.7800+130.2600/+30.7802+130.2400/+30.7807+130.2200/+30.7849+130.2000/+30.8000+130.1835/+30.8003+130.1800/+30.8009+130.1600/+30.8028+130.1400/+30.8100+130.1200/+30.8200+130.1070/+30.8209+130.1000/+30.8227+130.0800/+30.8269+130.0600/+30.8389+130.0400/+30.8400+130.0380/+30.8428+130.0200/+30.8451+130.0000/+30.8491+129.9800/+30.8559+129.9600/+30.8600+129.9520/+30.8657+129.9400/+30.8780+129.9200/+30.8800+129.9161/+30.8865+129.9000/+30.8977+129.8800/+30.9000+129.8735/+30.9063+129.8600/+30.9200+129.8425/+30.9218+129.8400/+30.9308+129.8200/+30.9400+129.8014/+30.9415+129.8000/+30.9600+129.7821/+30.9629+129.7800/+30.9800+129.7650/+30.9845+129.7600/+30.9980+129.7400/+31.0000+129.7368/+31.0046+129.7400/+31.0174+129.7600/+31.0200+129.7712/+31.0214+129.7800/ 西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8112+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7888+130.2800/+30.8000+130.2661/+30.8112+130.2800/ 北西 3 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 +31.0554+129.7600/+31.0496+129.7800/+31.0479+129.8000/+31.0400+129.8200/+31.0400+129.8201/+31.0362+129.8400/+31.0331+129.8600/+31.0265+129.8800/+31.0202+129.9000/+31.0200+129.9006/+31.0118+129.9200/+31.0000+129.9364/+30.9987+129.9400/+30.9918+129.9600/+30.9849+129.9800/+30.9800+129.9907/+30.9765+130.0000/+30.9631+130.0200/+30.9600+130.0228/+30.9561+130.0400/+30.9400+130.0577/+30.9385+130.0600/+30.9307+130.0800/+30.9200+130.0934/+30.9187+130.1000/+30.9138+130.1200/+30.9000+130.1362/+30.8993+130.1400/+30.8963+130.1600/+30.8800+130.1778/+30.8797+130.1800/+30.8779+130.2000/+30.8600+130.2191/+30.8599+130.2200/+30.8593+130.2400/+30.8467+130.2600/+30.8400+130.2666/+30.8399+130.2800/+30.8380+130.3000/+30.8200+130.3180/+30.8127+130.3200/+30.8000+130.3327/+30.7807+130.3200/+30.7800+130.3200/+30.7604+130.3000/+30.7619+130.2800/+30.7800+130.2619/+30.7801+130.2600/+30.7807+130.2400/+30.8000+130.2200/+30.8007+130.2000/+30.8052+130.1800/+30.8200+130.1637/+30.8206+130.1600/+30.8231+130.1400/+30.8357+130.1200/+30.8400+130.1150/+30.8426+130.1000/+30.8486+130.0800/+30.8600+130.0643/+30.8610+130.0600/+30.8659+130.0400/+30.8789+130.0200/+30.8737+130.0000/+30.8800+129.9906/+30.8885+129.9800/+30.9000+129.9654/+30.9021+129.9600/+30.9089+129.9400/+30.9187+129.9200/+30.9200+129.9173/+30.9276+129.9000/+30.9378+129.8800/+30.9400+129.8742/+30.9473+129.8600/+30.9600+129.8453/+30.9650+129.8400/+30.9766+129.8200/+30.9800+129.8132/+30.9882+129.8000/+31.0000+129.7808/+31.0056+129.7800/+31.0200+129.7760/+31.0340+129.7600/+31.0400+129.7503/+31.0554+129.7600/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8129+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7902+130.2800/+30.8000+130.2680/+30.8129+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 +31.0471+129.8000/+31.0454+129.8200/+31.0449+129.8400/+31.0407+129.8600/+31.0400+129.8615/+31.0363+129.8800/+31.0299+129.9000/+31.0249+129.9200/+31.0200+129.9335/+31.0169+129.9400/+31.0010+129.9600/+31.0000+129.9611/+30.9941+129.9800/+30.9853+130.0000/+30.9800+130.0091/+30.9745+130.0200/+30.9600+130.0334/+30.9578+130.0400/+30.9430+130.0600/+30.9400+130.0635/+30.9357+130.0800/+30.9200+130.0995/+30.9199+130.1000/+30.9166+130.1200/+30.9000+130.1397/+30.8999+130.1400/+30.8975+130.1600/+30.8824+130.1800/+30.8800+130.1825/+30.8787+130.2000/+30.8643+130.2200/+30.8600+130.2243/+30.8595+130.2400/+30.8526+130.2600/+30.8400+130.2726/+30.8399+130.2800/+30.8389+130.3000/+30.8200+130.3189/+30.8147+130.3200/+30.8000+130.3347/+30.7800+130.3234/+30.7766+130.3200/+30.7604+130.3000/+30.7629+130.2800/+30.7800+130.2629/+30.7801+130.2600/+30.7811+130.2400/+30.8000+130.2208/+30.8002+130.2200/+30.8012+130.2000/+30.8132+130.1800/+30.8200+130.1729/+30.8212+130.1600/+30.8266+130.1400/+30.8400+130.1241/+30.8408+130.1200/+30.8446+130.1000/+30.8586+130.0800/+30.8600+130.0783/+30.8641+130.0600/+30.8763+130.0400/+30.8800+130.0350/+30.8837+130.0200/+30.8828+130.0000/+30.9000+129.9831/+30.9019+129.9800/+30.9073+129.9600/+30.9170+129.9400/+30.9200+129.9355/+30.9292+129.9200/+30.9368+129.9000/+30.9400+129.8943/+30.9524+129.8800/+30.9600+129.8694/+30.9669+129.8600/+30.9800+129.8431/+30.9825+129.8400/+30.9980+129.8200/+31.0000+129.8183/+31.0200+129.8163/+31.0375+129.8000/+31.0400+129.7967/+31.0471+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8113+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7921+130.2800/+30.8000+130.2700/+30.8113+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 +31.0644+129.8200/+31.0705+129.8400/+31.0685+129.8600/+31.0613+129.8800/+31.0600+129.8825/+31.0531+129.9000/+31.0414+129.9200/+31.0400+129.9218/+31.0328+129.9400/+31.0262+129.9600/+31.0200+129.9668/+31.0111+129.9800/+31.0000+129.9988/+30.9993+130.0000/+30.9903+130.0200/+30.9800+130.0372/+30.9786+130.0400/+30.9600+130.0555/+30.9580+130.0600/+30.9459+130.0800/+30.9400+130.0863/+30.9362+130.1000/+30.9200+130.1193/+30.9198+130.1200/+30.9153+130.1400/+30.9000+130.1568/+30.8993+130.1600/+30.8954+130.1800/+30.8800+130.1962/+30.8794+130.2000/+30.8752+130.2200/+30.8600+130.2353/+30.8597+130.2400/+30.8565+130.2600/+30.8400+130.2765/+30.8399+130.2800/+30.8390+130.3000/+30.8200+130.3190/+30.8157+130.3200/+30.8000+130.3357/+30.7800+130.3258/+30.7742+130.3200/+30.7604+130.3000/+30.7633+130.2800/+30.7800+130.2633/+30.7801+130.2600/+30.7813+130.2400/+30.8000+130.2210/+30.8002+130.2200/+30.8016+130.2000/+30.8169+130.1800/+30.8200+130.1766/+30.8216+130.1600/+30.8292+130.1400/+30.8400+130.1271/+30.8416+130.1200/+30.8481+130.1000/+30.8600+130.0840/+30.8613+130.0800/+30.8682+130.0600/+30.8800+130.0436/+30.8816+130.0400/+30.8916+130.0200/+30.9000+130.0005/+30.9002+130.0000/+30.9103+129.9800/+30.9200+129.9615/+30.9209+129.9600/+30.9326+129.9400/+30.9400+129.9269/+30.9452+129.9200/+30.9600+129.9031/+30.9627+129.9000/+30.9799+129.8800/+30.9800+129.8798/+30.9924+129.8600/+31.0000+129.8522/+31.0188+129.8400/+31.0200+129.8385/+31.0378+129.8200/+31.0400+129.8174/+31.0600+129.8131/+31.0644+129.8200/ 北西 50 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/+30.7912+130.2800/+30.8000+130.2695/+30.8123+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 +31.0631+129.8000/+31.0677+129.8200/+31.0692+129.8400/+31.0649+129.8600/+31.0600+129.8695/+31.0564+129.8800/+31.0461+129.9000/+31.0400+129.9088/+31.0360+129.9200/+31.0278+129.9400/+31.0200+129.9566/+31.0183+129.9600/+31.0023+129.9800/+31.0000+129.9842/+30.9935+130.0000/+30.9840+130.0200/+30.9800+130.0264/+30.9725+130.0400/+30.9600+130.0501/+30.9557+130.0600/+30.9400+130.0788/+30.9394+130.0800/+30.9314+130.1000/+30.9200+130.1133/+30.9183+130.1200/+30.9109+130.1400/+30.9000+130.1521/+30.8985+130.1600/+30.8897+130.1800/+30.8800+130.1900/+30.8789+130.2000/+30.8691+130.2200/+30.8600+130.2291/+30.8594+130.2400/+30.8521+130.2600/+30.8400+130.2721/+30.8399+130.2800/+30.8386+130.3000/+30.8200+130.3186/+30.8151+130.3200/+30.8000+130.3351/+30.7800+130.3240/+30.7760+130.3200/+30.7604+130.3000/+30.7622+130.2800/+30.7800+130.2622/+30.7801+130.2600/+30.7806+130.2400/+30.7964+130.2200/+30.8000+130.2163/+30.8007+130.2000/+30.8041+130.1800/+30.8200+130.1620/+30.8204+130.1600/+30.8230+130.1400/+30.8314+130.1200/+30.8400+130.1089/+30.8419+130.1000/+30.8493+130.0800/+30.8600+130.0664/+30.8629+130.0600/+30.8694+130.0400/+30.8800+130.0219/+30.8807+130.0200/+30.8822+130.0000/+30.9000+129.9808/+30.9005+129.9800/+30.9088+129.9600/+30.9200+129.9432/+30.9226+129.9400/+30.9330+129.9200/+30.9400+129.9063/+30.9444+129.9000/+30.9600+129.8858/+30.9669+129.8800/+30.9800+129.8605/+30.9804+129.8600/+30.9991+129.8400/+31.0000+129.8387/+31.0200+129.8258/+31.0275+129.8200/+31.0400+129.8062/+31.0549+129.8000/+31.0600+129.7983/+31.0631+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8134+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7914+130.2800/+30.8000+130.2696/+30.8134+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 +31.0724+129.8000/+31.0694+129.8200/+31.0675+129.8400/+31.0614+129.8600/+31.0600+129.8622/+31.0518+129.8800/+31.0400+129.8951/+31.0368+129.9000/+31.0272+129.9200/+31.0200+129.9379/+31.0190+129.9400/+31.0057+129.9600/+31.0000+129.9660/+30.9949+129.9800/+30.9858+130.0000/+30.9800+130.0093/+30.9740+130.0200/+30.9600+130.0329/+30.9576+130.0400/+30.9400+130.0592/+30.9396+130.0600/+30.9327+130.0800/+30.9200+130.0955/+30.9188+130.1000/+30.9134+130.1200/+30.9000+130.1359/+30.8992+130.1400/+30.8947+130.1600/+30.8800+130.1762/+30.8794+130.1800/+30.8767+130.2000/+30.8600+130.2178/+30.8598+130.2200/+30.8589+130.2400/+30.8400+130.2596/+30.8400+130.2600/+30.8398+130.2800/+30.8370+130.3000/+30.8200+130.3170/+30.8115+130.3200/+30.8000+130.3315/+30.7829+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/+30.7871+130.2200/+30.8000+130.2070/+30.8004+130.2000/+30.8020+130.1800/+30.8182+130.1600/+30.8200+130.1581/+30.8215+130.1400/+30.8255+130.1200/+30.8400+130.1022/+30.8407+130.1000/+30.8445+130.0800/+30.8600+130.0600/+30.8642+130.0400/+30.8721+130.0200/+30.8745+130.0000/+30.8800+129.9920/+30.8886+129.9800/+30.9000+129.9645/+30.9019+129.9600/+30.9119+129.9400/+30.9200+129.9294/+30.9276+129.9200/+30.9362+129.9000/+30.9400+129.8939/+30.9525+129.8800/+30.9600+129.8700/+30.9676+129.8600/+30.9800+129.8448/+30.9842+129.8400/+30.9978+129.8200/+31.0000+129.8182/+31.0200+129.8081/+31.0281+129.8000/+31.0400+129.7863/+31.0600+129.7812/+31.0724+129.8000/ 北西 60 鹿児島県三島村 4630300 小さな噴石の落下 75 1 +30.8138+130.2800/+30.8188+130.3000/+30.8000+130.3188/+30.7812+130.3000/+30.7899+130.2800/+30.8000+130.2676/+30.8138+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１８時から２１日１２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１８時から２１時まで　西　　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　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　　　　　 　 　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。