2026-09-05T20:00:00Z 通常 気象庁本庁 気象庁 2026-09-06T05:00:00+09:00 2026-09-06T06:00:00+09:00 2026-09-07T00:00:00+09:00 509 発表 1 降灰予報 1.1_0 　現在、口永良部島は噴火警戒レベル２（火口周辺規制）です。口永良部島で噴火が発生した場合には、６日０９時から１２時までは火口から南西方向、６日２１時から２４時までは火口から南西方向に降灰が予想されます。 降灰予報（定時） 06 口永良部島 509 降灰 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 鹿児島県屋久島町 4650500 降灰予報（定時） 06 口永良部島 509 +3026.60+13013.03+657/ 降灰 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 鹿児島県屋久島町 4650500 2026-09-06T06:00:00+09:00 2026-09-06T09:00:00+09:00 降灰 70 +30.4607+130.2000/+30.4762+130.2200/+30.4600+130.2362/+30.4400+130.2398/+30.4200+130.2388/+30.4012+130.2200/+30.4000+130.2188/+30.3812+130.2000/+30.3800+130.1982/+30.3618+130.1800/+30.3600+130.1773/+30.3427+130.1600/+30.3400+130.1559/+30.3241+130.1400/+30.3200+130.1350/+30.3049+130.1200/+30.3000+130.1139/+30.2858+130.1000/+30.2800+130.0936/+30.2660+130.0800/+30.2600+130.0736/+30.2461+130.0600/+30.2400+130.0533/+30.2200+130.0424/+30.2171+130.0400/+30.2000+130.0216/+30.1984+130.0200/+30.1835+130.0000/+30.1800+129.9938/+30.1652+129.9800/+30.1600+129.9751/+30.1411+129.9600/+30.1400+129.9589/+30.1261+129.9400/+30.1200+129.9277/+30.1124+129.9200/+30.1000+129.9077/+30.0924+129.9000/+30.0800+129.8859/+30.0741+129.8800/+30.0600+129.8630/+30.0572+129.8600/+30.0445+129.8400/+30.0400+129.8317/+30.0326+129.8200/+30.0212+129.8000/+30.0200+129.7970/+30.0112+129.7800/+30.0000+129.7670/+29.9939+129.7600/+29.9845+129.7400/+29.9800+129.7200/+29.9800+129.7199/+29.9734+129.7000/+29.9771+129.6800/+29.9800+129.6734/+30.0000+129.6614/+30.0156+129.6800/+30.0200+129.6840/+30.0400+129.6977/+30.0425+129.7000/+30.0600+129.7137/+30.0667+129.7200/+30.0800+129.7307/+30.0942+129.7400/+30.1000+129.7430/+30.1164+129.7600/+30.1200+129.7634/+30.1379+129.7800/+30.1400+129.7820/+30.1588+129.8000/+30.1600+129.8008/+30.1792+129.8200/+30.1800+129.8209/+30.1909+129.8400/+30.2000+129.8494/+30.2148+129.8600/+30.2200+129.8665/+30.2265+129.8800/+30.2400+129.8973/+30.2433+129.9000/+30.2600+129.9183/+30.2613+129.9200/+30.2800+129.9386/+30.2813+129.9400/+30.2943+129.9600/+30.3000+129.9768/+30.3035+129.9800/+30.3181+130.0000/+30.3200+130.0025/+30.3363+130.0200/+30.3400+130.0251/+30.3550+130.0400/+30.3600+130.0512/+30.3752+130.0600/+30.3800+130.0796/+30.3818+130.0600/+30.3971+130.0400/+30.4000+130.0396/+30.4002+130.0400/+30.4129+130.0600/+30.4183+130.0800/+30.4200+130.0820/+30.4314+130.1000/+30.4356+130.1200/+30.4391+130.1400/+30.4400+130.1427/+30.4532+130.1600/+30.4595+130.1800/+30.4600+130.1993/+30.4607+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4519+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2140/+30.4060+130.2000/+30.4050+130.1800/+30.4200+130.1625/+30.4400+130.1681/+30.4519+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-06T09:00:00+09:00 2026-09-06T12:00:00+09:00 降灰 70 +30.4732+130.2200/+30.4600+130.2332/+30.4400+130.2397/+30.4200+130.2385/+30.4015+130.2200/+30.4000+130.2179/+30.3821+130.2000/+30.3800+130.1961/+30.3639+130.1800/+30.3600+130.1723/+30.3477+130.1600/+30.3400+130.1481/+30.3319+130.1400/+30.3200+130.1247/+30.3152+130.1200/+30.3001+130.1000/+30.3000+130.0998/+30.2801+130.0800/+30.2800+130.0799/+30.2605+130.0600/+30.2600+130.0593/+30.2411+130.0400/+30.2400+130.0385/+30.2200+130.0350/+30.2036+130.0200/+30.2000+130.0150/+30.1871+130.0000/+30.1800+129.9862/+30.1737+129.9800/+30.1600+129.9647/+30.1542+129.9600/+30.1400+129.9477/+30.1340+129.9400/+30.1235+129.9200/+30.1200+129.9138/+30.1052+129.9000/+30.1000+129.8915/+30.0901+129.8800/+30.0800+129.8682/+30.0744+129.8600/+30.0639+129.8400/+30.0600+129.8319/+30.0524+129.8200/+30.0412+129.8000/+30.0400+129.7978/+30.0282+129.7800/+30.0200+129.7660/+30.0167+129.7600/+30.0082+129.7400/+30.0000+129.7266/+29.9954+129.7200/+29.9828+129.7000/+29.9800+129.6888/+29.9771+129.6800/+29.9663+129.6600/+29.9600+129.6453/+29.9578+129.6400/+29.9593+129.6200/+29.9600+129.6149/+29.9621+129.6200/+29.9800+129.6251/+30.0000+129.6258/+30.0102+129.6400/+30.0200+129.6580/+30.0213+129.6600/+30.0400+129.6772/+30.0436+129.6800/+30.0600+129.6911/+30.0674+129.7000/+30.0800+129.7117/+30.0948+129.7200/+30.1000+129.7221/+30.1189+129.7400/+30.1200+129.7414/+30.1341+129.7600/+30.1400+129.7658/+30.1575+129.7800/+30.1600+129.7822/+30.1711+129.8000/+30.1800+129.8106/+30.1868+129.8200/+30.1964+129.8400/+30.2000+129.8433/+30.2200+129.8567/+30.2226+129.8600/+30.2311+129.8800/+30.2400+129.8937/+30.2474+129.9000/+30.2600+129.9171/+30.2618+129.9200/+30.2800+129.9368/+30.2830+129.9400/+30.2943+129.9600/+30.2986+129.9800/+30.3000+129.9817/+30.3169+130.0000/+30.3200+130.0056/+30.3338+130.0200/+30.3400+130.0328/+30.3476+130.0400/+30.3597+130.0600/+30.3600+130.0605/+30.3793+130.0800/+30.3800+130.0811/+30.4000+130.0962/+30.4029+130.1000/+30.4193+130.1200/+30.4200+130.1215/+30.4330+130.1400/+30.4399+130.1600/+30.4400+130.1601/+30.4595+130.1800/+30.4600+130.2000/+30.4600+130.2036/+30.4732+130.2200/ 南西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4489+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2145/+30.4055+130.2000/+30.4061+130.1800/+30.4200+130.1632/+30.4400+130.1711/+30.4489+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-06T12:00:00+09:00 2026-09-06T15:00:00+09:00 降灰 70 +30.4632+130.2000/+30.4762+130.2200/+30.4600+130.2362/+30.4400+130.2398/+30.4200+130.2369/+30.4031+130.2200/+30.4001+130.2000/+30.4000+130.1996/+30.3805+130.1800/+30.3800+130.1763/+30.3637+130.1600/+30.3600+130.1400/+30.3600+130.1399/+30.3411+130.1200/+30.3400+130.1162/+30.3244+130.1000/+30.3200+130.0894/+30.3105+130.0800/+30.3000+130.0625/+30.2975+130.0600/+30.2813+130.0400/+30.2800+130.0378/+30.2633+130.0200/+30.2600+130.0144/+30.2430+130.0000/+30.2400+129.9961/+30.2248+129.9800/+30.2200+129.9752/+30.2058+129.9600/+30.2000+129.9505/+30.1929+129.9400/+30.1800+129.9251/+30.1749+129.9200/+30.1642+129.9000/+30.1600+129.8904/+30.1509+129.8800/+30.1400+129.8638/+30.1379+129.8600/+30.1243+129.8400/+30.1200+129.8321/+30.1143+129.8200/+30.1063+129.8000/+30.1000+129.7866/+30.0935+129.7800/+30.0800+129.7634/+30.0776+129.7600/+30.0681+129.7400/+30.0600+129.7211/+30.0594+129.7200/+30.0468+129.7000/+30.0434+129.6800/+30.0400+129.6732/+30.0348+129.6600/+30.0400+129.6466/+30.0600+129.6535/+30.0662+129.6600/+30.0800+129.6690/+30.1000+129.6727/+30.1112+129.6800/+30.1200+129.6876/+30.1306+129.7000/+30.1400+129.7071/+30.1600+129.7138/+30.1751+129.7200/+30.1800+129.7238/+30.1896+129.7400/+30.2000+129.7508/+30.2102+129.7400/+30.2103+129.7200/+30.2105+129.7000/+30.2000+129.6813/+30.1982+129.6800/+30.1844+129.6600/+30.1800+129.6406/+30.1799+129.6400/+30.1768+129.6200/+30.1735+129.6000/+30.1770+129.5800/+30.1800+129.5709/+30.1868+129.5600/+30.2000+129.5512/+30.2059+129.5600/+30.2183+129.5800/+30.2200+129.5831/+30.2288+129.6000/+30.2400+129.6195/+30.2404+129.6200/+30.2562+129.6400/+30.2600+129.6447/+30.2666+129.6600/+30.2733+129.6800/+30.2790+129.7000/+30.2800+129.7044/+30.2843+129.7200/+30.2977+129.7400/+30.3000+129.7458/+30.3053+129.7600/+30.3132+129.7800/+30.3200+129.7900/+30.3258+129.8000/+30.3320+129.8200/+30.3400+129.8369/+30.3412+129.8400/+30.3478+129.8600/+30.3525+129.8800/+30.3600+129.8982/+30.3612+129.9000/+30.3676+129.9200/+30.3727+129.9400/+30.3765+129.9600/+30.3800+129.9725/+30.3843+129.9800/+30.3904+130.0000/+30.3956+130.0200/+30.4000+130.0385/+30.4011+130.0400/+30.4129+130.0600/+30.4169+130.0800/+30.4200+130.0948/+30.4244+130.1000/+30.4363+130.1200/+30.4397+130.1400/+30.4400+130.1435/+30.4560+130.1600/+30.4598+130.1800/+30.4600+130.1968/+30.4632+130.2000/ +30.3205+129.9400/+30.3200+129.9409/+30.3198+129.9400/+30.3200+129.9393/+30.3205+129.9400/ +30.2403+129.7800/+30.2502+129.8000/+30.2400+129.8073/+30.2345+129.8000/+30.2397+129.7800/+30.2400+129.7796/+30.2403+129.7800/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4502+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2127/+30.4073+130.2000/+30.4071+130.1800/+30.4200+130.1623/+30.4400+130.1698/+30.4502+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-06T15:00:00+09:00 2026-09-06T18:00:00+09:00 降灰 70 +30.4615+130.2200/+30.4600+130.2215/+30.4400+130.2398/+30.4200+130.2393/+30.4007+130.2200/+30.4000+130.2195/+30.3805+130.2000/+30.3800+130.1994/+30.3605+130.1800/+30.3600+130.1793/+30.3403+130.1600/+30.3400+130.1596/+30.3200+130.1409/+30.3190+130.1400/+30.3000+130.1306/+30.2892+130.1200/+30.2800+130.1129/+30.2663+130.1000/+30.2600+130.0944/+30.2438+130.0800/+30.2400+130.0760/+30.2246+130.0600/+30.2200+130.0563/+30.2000+130.0483/+30.1935+130.0400/+30.1800+130.0247/+30.1732+130.0200/+30.1600+130.0085/+30.1521+130.0000/+30.1400+129.9898/+30.1303+129.9800/+30.1218+129.9600/+30.1200+129.9571/+30.1000+129.9449/+30.0951+129.9400/+30.0826+129.9200/+30.0800+129.9172/+30.0610+129.9000/+30.0600+129.8979/+30.0462+129.8800/+30.0400+129.8720/+30.0293+129.8600/+30.0200+129.8452/+30.0168+129.8400/+30.0008+129.8200/+30.0000+129.8192/+29.9822+129.8000/+29.9800+129.7904/+29.9770+129.7800/+29.9687+129.7600/+29.9659+129.7400/+29.9800+129.7284/+30.0000+129.7244/+30.0200+129.7340/+30.0322+129.7400/+30.0400+129.7438/+30.0600+129.7565/+30.0636+129.7600/+30.0800+129.7745/+30.0857+129.7800/+30.1000+129.7949/+30.1049+129.8000/+30.1200+129.8078/+30.1380+129.8200/+30.1400+129.8219/+30.1527+129.8400/+30.1600+129.8456/+30.1800+129.8591/+30.1809+129.8600/+30.1948+129.8800/+30.2000+129.8839/+30.2160+129.9000/+30.2200+129.9060/+30.2303+129.9200/+30.2400+129.9274/+30.2571+129.9400/+30.2600+129.9419/+30.2793+129.9600/+30.2800+129.9621/+30.2867+129.9800/+30.3000+129.9930/+30.3066+130.0000/+30.3200+130.0153/+30.3244+130.0200/+30.3384+130.0400/+30.3400+130.0416/+30.3574+130.0600/+30.3600+130.0629/+30.3762+130.0800/+30.3800+130.0865/+30.3926+130.1000/+30.4000+130.1150/+30.4049+130.1200/+30.4195+130.1400/+30.4200+130.1406/+30.4392+130.1600/+30.4400+130.1610/+30.4590+130.1800/+30.4599+130.2000/+30.4600+130.2182/+30.4615+130.2200/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4503+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2145/+30.4049+130.2000/+30.4054+130.1800/+30.4200+130.1641/+30.4400+130.1697/+30.4503+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-06T18:00:00+09:00 2026-09-06T21:00:00+09:00 降灰 70 +30.4580+130.1800/+30.4599+130.2000/+30.4599+130.2200/+30.4400+130.2398/+30.4200+130.2395/+30.4004+130.2200/+30.4000+130.2198/+30.3801+130.2000/+30.3800+130.1999/+30.3600+130.1931/+30.3469+130.1800/+30.3400+130.1772/+30.3225+130.1600/+30.3200+130.1584/+30.3004+130.1400/+30.3000+130.1397/+30.2800+130.1304/+30.2693+130.1200/+30.2600+130.1145/+30.2434+130.1000/+30.2400+130.0975/+30.2205+130.0800/+30.2200+130.0796/+30.2000+130.0783/+30.1806+130.0600/+30.1800+130.0593/+30.1600+130.0424/+30.1580+130.0400/+30.1400+130.0245/+30.1327+130.0200/+30.1200+130.0062/+30.1126+130.0000/+30.1000+129.9918/+30.0866+129.9800/+30.0800+129.9726/+30.0660+129.9600/+30.0600+129.9527/+30.0482+129.9400/+30.0400+129.9304/+30.0294+129.9200/+30.0200+129.9087/+30.0140+129.9000/+30.0027+129.8800/+30.0000+129.8758/+29.9857+129.8600/+29.9800+129.8503/+29.9740+129.8400/+29.9636+129.8200/+29.9600+129.8144/+29.9490+129.8000/+29.9470+129.7800/+29.9408+129.7600/+29.9600+129.7465/+29.9800+129.7516/+30.0000+129.7534/+30.0066+129.7600/+30.0200+129.7725/+30.0302+129.7800/+30.0400+129.7861/+30.0571+129.8000/+30.0600+129.8016/+30.0800+129.8151/+30.0889+129.8200/+30.1000+129.8254/+30.1187+129.8400/+30.1200+129.8412/+30.1372+129.8600/+30.1400+129.8627/+30.1525+129.8800/+30.1600+129.8861/+30.1800+129.8996/+30.1804+129.9000/+30.1926+129.9200/+30.2000+129.9254/+30.2186+129.9400/+30.2200+129.9410/+30.2390+129.9600/+30.2400+129.9610/+30.2588+129.9800/+30.2600+129.9815/+30.2712+130.0000/+30.2800+130.0105/+30.2894+130.0200/+30.3000+130.0299/+30.3103+130.0400/+30.3200+130.0495/+30.3303+130.0600/+30.3400+130.0676/+30.3523+130.0800/+30.3600+130.0872/+30.3727+130.1000/+30.3800+130.1074/+30.3927+130.1200/+30.4000+130.1269/+30.4129+130.1400/+30.4200+130.1444/+30.4355+130.1600/+30.4400+130.1620/+30.4580+130.1800/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4500+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2151/+30.4039+130.2000/+30.4043+130.1800/+30.4200+130.1638/+30.4400+130.1700/+30.4500+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-06T21:00:00+09:00 2026-09-07T00:00:00+09:00 降灰 70 +30.4589+130.1800/+30.4599+130.2000/+30.4599+130.2200/+30.4400+130.2398/+30.4200+130.2395/+30.4005+130.2200/+30.4000+130.2197/+30.3802+130.2000/+30.3800+130.1997/+30.3601+130.1800/+30.3600+130.1799/+30.3400+130.1714/+30.3285+130.1600/+30.3200+130.1541/+30.3055+130.1400/+30.3000+130.1354/+30.2830+130.1200/+30.2800+130.1177/+30.2611+130.1000/+30.2600+130.0990/+30.2400+130.0832/+30.2367+130.0800/+30.2200+130.0663/+30.2045+130.0600/+30.2000+130.0581/+30.1838+130.0400/+30.1800+130.0346/+30.1635+130.0200/+30.1600+130.0164/+30.1442+130.0000/+30.1400+129.9964/+30.1219+129.9800/+30.1200+129.9769/+30.1026+129.9600/+30.1000+129.9578/+30.0838+129.9400/+30.0800+129.9343/+30.0636+129.9200/+30.0600+129.9157/+30.0492+129.9000/+30.0400+129.8863/+30.0343+129.8800/+30.0207+129.8600/+30.0200+129.8585/+30.0096+129.8400/+30.0000+129.8303/+29.9876+129.8200/+29.9800+129.8115/+29.9720+129.8000/+29.9634+129.7800/+29.9600+129.7755/+29.9443+129.7600/+29.9400+129.7508/+29.9357+129.7400/+29.9400+129.7211/+29.9600+129.7209/+29.9800+129.7287/+30.0000+129.7320/+30.0097+129.7400/+30.0200+129.7530/+30.0260+129.7600/+30.0400+129.7708/+30.0555+129.7800/+30.0600+129.7826/+30.0758+129.8000/+30.0800+129.8049/+30.1000+129.8182/+30.1035+129.8200/+30.1200+129.8318/+30.1255+129.8400/+30.1400+129.8523/+30.1498+129.8600/+30.1600+129.8714/+30.1687+129.8800/+30.1800+129.8858/+30.1974+129.9000/+30.2000+129.9038/+30.2095+129.9200/+30.2200+129.9269/+30.2326+129.9400/+30.2400+129.9476/+30.2569+129.9600/+30.2600+129.9631/+30.2704+129.9800/+30.2796+130.0000/+30.2800+130.0003/+30.2992+130.0200/+30.3000+130.0207/+30.3191+130.0400/+30.3200+130.0409/+30.3387+130.0600/+30.3400+130.0612/+30.3585+130.0800/+30.3600+130.0814/+30.3783+130.1000/+30.3800+130.1016/+30.3983+130.1200/+30.4000+130.1219/+30.4181+130.1400/+30.4200+130.1418/+30.4382+130.1600/+30.4400+130.1611/+30.4589+130.1800/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4412+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2124/+30.4068+130.2000/+30.4103+130.1800/+30.4200+130.1700/+30.4400+130.1788/+30.4412+130.1800/ 南西 4 鹿児島県屋久島町 4650500 　現在、口永良部島は噴火警戒レベル２（火口周辺規制）です。口永良部島で噴火が発生した場合には、６日０９時から１２時までは火口から南西方向、６日２１時から２４時までは火口から南西方向に降灰が予想されます。 　６日６時から６日２４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 　０６日０６時から０９時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０６日０９時から１２時まで　南西　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０６日１２時から１５時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０６日１５時から１８時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０６日１８時から２１時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０６日２１時から２４時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　 　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：屋久島町 　 　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。 　強風のため、遠方まで小さな噴石が流されるおそれがあります。