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+09:00 511 発表 1 降灰予報 1.1_0 　現在、諏訪之瀬島は噴火警戒レベル２（火口周辺規制）です。諏訪之瀬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 諏訪之瀬島 511 降灰 70 鹿児島県十島村 4630400 小さな噴石の落下 75 鹿児島県十島村 4630400 降灰予報（定時） 06 諏訪之瀬島 511 +2938.30+12942.83+796/ 降灰 70 鹿児島県十島村 4630400 小さな噴石の落下 75 鹿児島県十島村 4630400 2026-08-20T18:00:00+09:00 2026-08-20T21:00:00+09:00 降灰 70 +30.0027+129.1000/+30.0000+129.1046/+29.9926+129.1000/+30.0000+129.0917/+30.0027+129.1000/ +29.9705+129.1400/+29.9688+129.1600/+29.9625+129.1800/+29.9600+129.1894/+29.9561+129.2000/+29.9442+129.2200/+29.9400+129.2303/+29.9378+129.2400/+29.9334+129.2600/+29.9264+129.2800/+29.9200+129.2950/+29.9179+129.3000/+29.9027+129.3200/+29.9000+129.3264/+29.8912+129.3400/+29.8800+129.3495/+29.8756+129.3600/+29.8707+129.3800/+29.8600+129.3927/+29.8550+129.4000/+29.8466+129.4200/+29.8400+129.4295/+29.8314+129.4400/+29.8200+129.4525/+29.8183+129.4600/+29.8000+129.4775/+29.7986+129.4800/+29.7919+129.5000/+29.7800+129.5126/+29.7782+129.5200/+29.7681+129.5400/+29.7600+129.5484/+29.7581+129.5600/+29.7408+129.5800/+29.7400+129.5808/+29.7382+129.6000/+29.7200+129.6191/+29.7199+129.6200/+29.7186+129.6400/+29.7000+129.6589/+29.6999+129.6600/+29.6993+129.6800/+29.6800+129.6994/+29.6800+129.7000/+29.6792+129.7200/+29.6600+129.7392/+29.6400+129.7397/+29.6203+129.7200/+29.6201+129.7000/+29.6202+129.6800/+29.6271+129.6600/+29.6400+129.6471/+29.6404+129.6400/+29.6479+129.6200/+29.6600+129.6078/+29.6608+129.6000/+29.6681+129.5800/+29.6800+129.5674/+29.6814+129.5600/+29.6895+129.5400/+29.7000+129.5282/+29.7021+129.5200/+29.7126+129.5000/+29.7200+129.4912/+29.7231+129.4800/+29.7390+129.4600/+29.7400+129.4588/+29.7443+129.4400/+29.7429+129.4200/+29.7600+129.4033/+29.7615+129.4000/+29.7689+129.3800/+29.7800+129.3604/+29.7802+129.3600/+29.7903+129.3400/+29.8000+129.3280/+29.8057+129.3200/+29.8129+129.3000/+29.8200+129.2889/+29.8292+129.2800/+29.8400+129.2666/+29.8446+129.2600/+29.8530+129.2400/+29.8600+129.2316/+29.8681+129.2200/+29.8800+129.2030/+29.8821+129.2000/+29.8962+129.1800/+29.9000+129.1763/+29.9200+129.1664/+29.9252+129.1600/+29.9360+129.1400/+29.9400+129.1341/+29.9600+129.1248/+29.9705+129.1400/ 北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6615+129.6800/+29.6727+129.7000/+29.6600+129.7127/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6809/+29.6585+129.6800/+29.6600+129.6784/+29.6615+129.6800/ 北西 4 鹿児島県十島村 4630400 2026-08-20T21:00:00+09:00 2026-08-21T00:00:00+09:00 降灰 70 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北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6716+129.7000/+29.6600+129.7116/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6806/+29.6600+129.6803/+29.6716+129.7000/ 北西 2 鹿児島県十島村 4630400 2026-08-21T00:00:00+09:00 2026-08-21T03:00:00+09:00 降灰 70 +29.9602+129.1400/+29.9600+129.1416/+29.9553+129.1600/+29.9467+129.1800/+29.9428+129.2000/+29.9400+129.2046/+29.9329+129.2200/+29.9271+129.2400/+29.9209+129.2600/+29.9200+129.2621/+29.9106+129.2800/+29.9010+129.3000/+29.9000+129.3014/+29.8897+129.3200/+29.8800+129.3312/+29.8761+129.3400/+29.8678+129.3600/+29.8615+129.3800/+29.8600+129.3819/+29.8476+129.4000/+29.8400+129.4135/+29.8368+129.4200/+29.8200+129.4383/+29.8195+129.4400/+29.8152+129.4600/+29.8000+129.4752/+29.7967+129.4800/+29.7853+129.5000/+29.7800+129.5057/+29.7758+129.5200/+29.7603+129.5400/+29.7600+129.5403/+29.7563+129.5600/+29.7400+129.5788/+29.7397+129.5800/+29.7367+129.6000/+29.7200+129.6183/+29.7198+129.6200/+29.7174+129.6400/+29.7000+129.6577/+29.6998+129.6600/+29.6987+129.6800/+29.6800+129.6988/+29.6799+129.7000/+29.6791+129.7200/+29.6600+129.7391/+29.6400+129.7397/+29.6203+129.7200/+29.6200+129.7000/+29.6201+129.6800/+29.6215+129.6600/+29.6400+129.6415/+29.6402+129.6400/+29.6413+129.6200/+29.6551+129.6000/+29.6600+129.5949/+29.6613+129.5800/+29.6671+129.5600/+29.6800+129.5451/+29.6812+129.5400/+29.6854+129.5200/+29.7000+129.5018/+29.7007+129.5000/+29.7060+129.4800/+29.7186+129.4600/+29.7200+129.4578/+29.7251+129.4400/+29.7291+129.4200/+29.7369+129.4000/+29.7400+129.3952/+29.7512+129.3800/+29.7600+129.3681/+29.7629+129.3600/+29.7710+129.3400/+29.7800+129.3209/+29.7807+129.3200/+29.7950+129.3000/+29.8000+129.2959/+29.8114+129.2800/+29.8200+129.2604/+29.8202+129.2600/+29.8333+129.2400/+29.8400+129.2279/+29.8486+129.2200/+29.8600+129.2091/+29.8674+129.2000/+29.8799+129.1800/+29.8800+129.1799/+29.8955+129.1600/+29.9000+129.1544/+29.9200+129.1479/+29.9293+129.1400/+29.9400+129.1280/+29.9600+129.1387/+29.9602+129.1400/ 北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6621+129.6800/+29.6741+129.7000/+29.6600+129.7141/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6806/+29.6573+129.6800/+29.6600+129.6779/+29.6621+129.6800/ 北西 4 鹿児島県十島村 4630400 2026-08-21T03:00:00+09:00 2026-08-21T06:00:00+09:00 降灰 70 +30.0187+129.1400/+30.0170+129.1600/+30.0081+129.1800/+30.0002+129.2000/+30.0000+129.2003/+29.9845+129.2200/+29.9800+129.2338/+29.9786+129.2400/+29.9726+129.2600/+29.9607+129.2800/+29.9600+129.2810/+29.9475+129.3000/+29.9400+129.3134/+29.9375+129.3200/+29.9213+129.3400/+29.9200+129.3409/+29.9114+129.3600/+29.9043+129.3800/+29.9000+129.3872/+29.8869+129.4000/+29.8800+129.4045/+29.8728+129.4200/+29.8600+129.4372/+29.8582+129.4400/+29.8507+129.4600/+29.8400+129.4760/+29.8200+129.4799/+29.8199+129.4800/+29.8118+129.5000/+29.8000+129.5126/+29.7972+129.5200/+29.7800+129.5397/+29.7799+129.5400/+29.7749+129.5600/+29.7600+129.5755/+29.7587+129.5800/+29.7432+129.6000/+29.7400+129.6032/+29.7377+129.6200/+29.7200+129.6380/+29.7196+129.6400/+29.7136+129.6600/+29.7000+129.6736/+29.6997+129.6800/+29.6839+129.7000/+29.6800+129.7039/+29.6793+129.7200/+29.6600+129.7393/+29.6400+129.7397/+29.6203+129.7200/+29.6201+129.7000/+29.6202+129.6800/+29.6400+129.6600/+29.6408+129.6400/+29.6600+129.6202/+29.6601+129.6200/+29.6622+129.6000/+29.6800+129.5810/+29.6804+129.5800/+29.6846+129.5600/+29.7000+129.5422/+29.7008+129.5400/+29.7097+129.5200/+29.7200+129.5067/+29.7221+129.5000/+29.7353+129.4800/+29.7400+129.4742/+29.7464+129.4600/+29.7600+129.4435/+29.7616+129.4400/+29.7650+129.4200/+29.7775+129.4000/+29.7800+129.3966/+29.7931+129.3800/+29.8000+129.3695/+29.8062+129.3600/+29.8141+129.3400/+29.8200+129.3311/+29.8328+129.3200/+29.8400+129.3118/+29.8468+129.3000/+29.8600+129.2831/+29.8631+129.2800/+29.8745+129.2600/+29.8800+129.2518/+29.8896+129.2400/+29.9000+129.2289/+29.9108+129.2200/+29.9200+129.2098/+29.9267+129.2000/+29.9400+129.1816/+29.9430+129.1800/+29.9600+129.1685/+29.9716+129.1600/+29.9800+129.1484/+29.9841+129.1400/+30.0000+129.1205/+30.0187+129.1400/ 北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6739+129.7000/+29.6600+129.7139/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6812/+29.6600+129.6803/+29.6739+129.7000/ 北西 2 鹿児島県十島村 4630400 2026-08-21T06:00:00+09:00 2026-08-21T09:00:00+09:00 降灰 70 +30.0010+129.1400/+30.0000+129.1442/+29.9980+129.1400/+30.0000+129.1347/+30.0010+129.1400/ +29.9766+129.1800/+29.9793+129.2000/+29.9734+129.2200/+29.9690+129.2400/+29.9613+129.2600/+29.9600+129.2618/+29.9470+129.2800/+29.9400+129.2922/+29.9376+129.3000/+29.9213+129.3200/+29.9200+129.3210/+29.9124+129.3400/+29.9043+129.3600/+29.9000+129.3702/+29.8933+129.3800/+29.8800+129.3904/+29.8755+129.4000/+29.8669+129.4200/+29.8600+129.4290/+29.8545+129.4400/+29.8458+129.4600/+29.8400+129.4684/+29.8200+129.4764/+29.8180+129.4800/+29.8074+129.5000/+29.8000+129.5079/+29.7963+129.5200/+29.7800+129.5383/+29.7795+129.5400/+29.7732+129.5600/+29.7600+129.5733/+29.7583+129.5800/+29.7404+129.6000/+29.7400+129.6004/+29.7377+129.6200/+29.7200+129.6380/+29.7197+129.6400/+29.7147+129.6600/+29.7000+129.6747/+29.6997+129.6800/+29.6865+129.7000/+29.6800+129.7065/+29.6794+129.7200/+29.6600+129.7394/+29.6400+129.7397/+29.6203+129.7200/+29.6201+129.7000/+29.6202+129.6800/+29.6400+129.6601/+29.6400+129.6600/+29.6410+129.6400/+29.6600+129.6205/+29.6602+129.6200/+29.6626+129.6000/+29.6800+129.5815/+29.6806+129.5800/+29.6855+129.5600/+29.7000+129.5438/+29.7014+129.5400/+29.7097+129.5200/+29.7200+129.5076/+29.7227+129.5000/+29.7368+129.4800/+29.7400+129.4763/+29.7477+129.4600/+29.7600+129.4425/+29.7608+129.4400/+29.7638+129.4200/+29.7747+129.4000/+29.7800+129.3930/+29.7892+129.3800/+29.8000+129.3626/+29.8016+129.3600/+29.8102+129.3400/+29.8200+129.3236/+29.8231+129.3200/+29.8394+129.3000/+29.8400+129.2995/+29.8532+129.2800/+29.8600+129.2665/+29.8651+129.2600/+29.8764+129.2400/+29.8800+129.2340/+29.8920+129.2200/+29.9000+129.2137/+29.9197+129.2000/+29.9200+129.1996/+29.9347+129.1800/+29.9400+129.1738/+29.9600+129.1649/+29.9766+129.1800/ 北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6742+129.7000/+29.6600+129.7142/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6812/+29.6600+129.6810/+29.6742+129.7000/ 北西 2 鹿児島県十島村 4630400 2026-08-21T09:00:00+09:00 2026-08-21T12:00:00+09:00 降灰 70 +30.0322+129.2000/+30.0209+129.2200/+30.0200+129.2223/+30.0146+129.2400/+30.0039+129.2600/+30.0000+129.2637/+29.9852+129.2800/+29.9800+129.2919/+29.9776+129.3000/+29.9647+129.3200/+29.9600+129.3249/+29.9497+129.3400/+29.9400+129.3519/+29.9337+129.3600/+29.9200+129.3756/+29.9178+129.3800/+29.9082+129.4000/+29.9000+129.4165/+29.8937+129.4200/+29.8800+129.4248/+29.8730+129.4400/+29.8615+129.4600/+29.8600+129.4619/+29.8510+129.4800/+29.8400+129.4931/+29.8200+129.4978/+29.8190+129.5000/+29.8083+129.5200/+29.8000+129.5286/+29.7957+129.5400/+29.7800+129.5566/+29.7787+129.5600/+29.7658+129.5800/+29.7600+129.5858/+29.7566+129.6000/+29.7400+129.6171/+29.7392+129.6200/+29.7216+129.6400/+29.7200+129.6416/+29.7181+129.6600/+29.7000+129.6781/+29.6998+129.6800/+29.6934+129.7000/+29.6800+129.7134/+29.6794+129.7200/+29.6600+129.7394/+29.6400+129.7397/+29.6203+129.7200/+29.6201+129.7000/+29.6203+129.6800/+29.6400+129.6602/+29.6401+129.6600/+29.6419+129.6400/+29.6600+129.6217/+29.6605+129.6200/+29.6664+129.6000/+29.6800+129.5860/+29.6819+129.5800/+29.7000+129.5601/+29.7000+129.5600/+29.7053+129.5400/+29.7200+129.5232/+29.7217+129.5200/+29.7320+129.5000/+29.7400+129.4897/+29.7457+129.4800/+29.7600+129.4640/+29.7622+129.4600/+29.7685+129.4400/+29.7781+129.4200/+29.7800+129.4174/+29.7915+129.4000/+29.8000+129.3908/+29.8147+129.3800/+29.8200+129.3742/+29.8275+129.3600/+29.8381+129.3400/+29.8400+129.3388/+29.8590+129.3200/+29.8600+129.3181/+29.8750+129.3000/+29.8800+129.2964/+29.8927+129.2800/+29.9000+129.2691/+29.9144+129.2600/+29.9200+129.2537/+29.9307+129.2400/+29.9400+129.2288/+29.9536+129.2200/+29.9600+129.2153/+29.9758+129.2000/+29.9800+129.1955/+29.9969+129.1800/+30.0000+129.1775/+30.0129+129.1800/+30.0200+129.1827/+30.0322+129.2000/ 北西 70 鹿児島県十島村 4630400 小さな噴石の落下 75 1 +29.6742+129.7000/+29.6600+129.7142/+29.6588+129.7200/+29.6400+129.7388/+29.6212+129.7200/+29.6212+129.7000/+29.6400+129.6812/+29.6600+129.6814/+29.6742+129.7000/ 北西 2 鹿児島県十島村 4630400 　現在、諏訪之瀬島は噴火警戒レベル２（火口周辺規制）です。諏訪之瀬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　北西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　２０日２１時から２４時まで　北西　　　　　　７０ｋｍ　　２ｋｍ　　　　　 　２１日００時から０３時まで　北西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　２１日０３時から０６時まで　北西　　　　　　７０ｋｍ　　２ｋｍ　　　　　 　２１日０６時から０９時まで　北西　　　　　　７０ｋｍ　　２ｋｍ　　　　　 　２１日０９時から１２時まで　北西　　　　　　７０ｋｍ　　２ｋｍ　　　　　 　 　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：十島村 　 　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。