2026-08-04T14:00:00Z 通常 気象庁本庁 気象庁 2026-08-04T23:00:00+09:00 2026-08-05T00:00:00+09:00 2026-08-05T18:00:00+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、５日０９時から１２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 2026-08-05T00:00:00+09:00 2026-08-05T03:00:00+09:00 降灰 70 +30.4737+130.2000/+30.4751+130.2200/+30.4600+130.2351/+30.4400+130.2399/+30.4200+130.2356/+30.4044+130.2200/+30.4001+130.2000/+30.4000+130.1800/+30.4000+130.1795/+30.3808+130.1600/+30.3802+130.1400/+30.3800+130.1366/+30.3637+130.1200/+30.3606+130.1000/+30.3600+130.0912/+30.3492+130.0800/+30.3417+130.0600/+30.3400+130.0443/+30.3358+130.0400/+30.3226+130.0200/+30.3200+130.0035/+30.3168+130.0000/+30.3043+129.9800/+30.3002+129.9600/+30.3000+129.9594/+30.2800+129.9475/+30.2759+129.9400/+30.2681+129.9200/+30.2628+129.9000/+30.2600+129.8911/+30.2540+129.8800/+30.2447+129.8600/+30.2400+129.8407/+30.2395+129.8400/+30.2302+129.8200/+30.2241+129.8000/+30.2200+129.7869/+30.2180+129.7800/+30.2137+129.7600/+30.2114+129.7400/+30.2091+129.7200/+30.2047+129.7000/+30.2040+129.6800/+30.2006+129.6600/+30.2000+129.6585/+30.1984+129.6400/+30.1972+129.6200/+30.1959+129.6000/+30.2000+129.5872/+30.2073+129.6000/+30.2089+129.6200/+30.2200+129.6399/+30.2203+129.6400/+30.2400+129.6429/+30.2583+129.6600/+30.2600+129.6611/+30.2700+129.6800/+30.2779+129.7000/+30.2800+129.7044/+30.2875+129.7200/+30.3000+129.7386/+30.3006+129.7400/+30.3060+129.7600/+30.3129+129.7800/+30.3185+129.8000/+30.3200+129.8026/+30.3309+129.8200/+30.3385+129.8400/+30.3400+129.8432/+30.3477+129.8600/+30.3538+129.8800/+30.3581+129.9000/+30.3588+129.9200/+30.3600+129.9236/+30.3719+129.9400/+30.3777+129.9600/+30.3800+129.9757/+30.3832+129.9800/+30.3955+130.0000/+30.3989+130.0200/+30.4000+130.0281/+30.4106+130.0400/+30.4181+130.0600/+30.4196+130.0800/+30.4200+130.0826/+30.4365+130.1000/+30.4396+130.1200/+30.4400+130.1400/+30.4596+130.1600/+30.4599+130.1800/+30.4600+130.1863/+30.4737+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4411+130.1800/+30.4583+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4373+130.1800/+30.4400+130.1784/+30.4411+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-05T03:00:00+09:00 2026-08-05T06:00:00+09:00 降灰 70 +30.4661+130.2000/+30.4706+130.2200/+30.4600+130.2306/+30.4400+130.2398/+30.4200+130.2372/+30.4028+130.2200/+30.4001+130.2000/+30.4000+130.1956/+30.3844+130.1800/+30.3802+130.1600/+30.3800+130.1531/+30.3669+130.1400/+30.3606+130.1200/+30.3600+130.1108/+30.3493+130.1000/+30.3411+130.0800/+30.3400+130.0698/+30.3304+130.0600/+30.3216+130.0400/+30.3200+130.0309/+30.3098+130.0200/+30.3018+130.0000/+30.3000+129.9907/+30.2906+129.9800/+30.2800+129.9723/+30.2666+129.9600/+30.2610+129.9400/+30.2600+129.9371/+30.2502+129.9200/+30.2437+129.9000/+30.2400+129.8843/+30.2333+129.8800/+30.2200+129.8675/+30.2169+129.8600/+30.2114+129.8400/+30.2058+129.8200/+30.2000+129.8000/+30.2000+129.7997/+30.1882+129.7800/+30.1803+129.7600/+30.1800+129.7586/+30.1756+129.7400/+30.1714+129.7200/+30.1668+129.7000/+30.1657+129.6800/+30.1635+129.6600/+30.1630+129.6400/+30.1717+129.6200/+30.1800+129.6134/+30.2000+129.6074/+30.2060+129.6200/+30.2140+129.6400/+30.2200+129.6538/+30.2226+129.6600/+30.2333+129.6800/+30.2400+129.6918/+30.2450+129.7000/+30.2600+129.7157/+30.2631+129.7200/+30.2688+129.7400/+30.2744+129.7600/+30.2800+129.7697/+30.2897+129.7800/+30.2996+129.8000/+30.3000+129.8005/+30.3094+129.8200/+30.3135+129.8400/+30.3200+129.8530/+30.3236+129.8600/+30.3331+129.8800/+30.3400+129.8964/+30.3423+129.9000/+30.3512+129.9200/+30.3519+129.9400/+30.3584+129.9600/+30.3600+129.9658/+30.3710+129.9800/+30.3780+130.0000/+30.3800+130.0123/+30.3864+130.0200/+30.3979+130.0400/+30.4000+130.0599/+30.4001+130.0600/+30.4181+130.0800/+30.4197+130.1000/+30.4200+130.1012/+30.4382+130.1200/+30.4398+130.1400/+30.4400+130.1414/+30.4585+130.1600/+30.4599+130.1800/+30.4600+130.1939/+30.4661+130.2000/ 南西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4414+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4202+130.2000/+30.4282+130.1800/+30.4400+130.1786/+30.4414+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-05T06:00:00+09:00 2026-08-05T09:00:00+09:00 降灰 70 +30.4668+130.2200/+30.4600+130.2268/+30.4400+130.2398/+30.4200+130.2384/+30.4016+130.2200/+30.4001+130.2000/+30.4000+130.1995/+30.3805+130.1800/+30.3800+130.1706/+30.3694+130.1600/+30.3604+130.1400/+30.3600+130.1371/+30.3431+130.1200/+30.3402+130.1000/+30.3400+130.0994/+30.3217+130.0800/+30.3200+130.0717/+30.3086+130.0600/+30.3010+130.0400/+30.3000+130.0364/+30.2851+130.0200/+30.2800+130.0022/+30.2779+130.0000/+30.2600+129.9890/+30.2510+129.9800/+30.2433+129.9600/+30.2400+129.9494/+30.2297+129.9400/+30.2200+129.9251/+30.2170+129.9200/+30.2065+129.9000/+30.2010+129.8800/+30.2000+129.8773/+30.1813+129.8600/+30.1800+129.8578/+30.1725+129.8400/+30.1653+129.8200/+30.1600+129.8088/+30.1520+129.8000/+30.1423+129.7800/+30.1400+129.7762/+30.1309+129.7600/+30.1243+129.7400/+30.1200+129.7246/+30.1186+129.7200/+30.1117+129.7000/+30.1091+129.6800/+30.1000+129.6618/+30.0992+129.6600/+30.0940+129.6400/+30.0918+129.6200/+30.0890+129.6000/+30.1000+129.5818/+30.1095+129.6000/+30.1141+129.6200/+30.1200+129.6298/+30.1400+129.6396/+30.1404+129.6400/+30.1600+129.6545/+30.1636+129.6600/+30.1771+129.6800/+30.1800+129.6849/+30.1885+129.7000/+30.2000+129.7102/+30.2113+129.7200/+30.2200+129.7316/+30.2244+129.7400/+30.2288+129.7600/+30.2380+129.7800/+30.2400+129.7838/+30.2529+129.8000/+30.2600+129.8059/+30.2698+129.8200/+30.2766+129.8400/+30.2800+129.8449/+30.2900+129.8600/+30.2980+129.8800/+30.3000+129.8843/+30.3156+129.9000/+30.3200+129.9080/+30.3264+129.9200/+30.3217+129.9400/+30.3366+129.9600/+30.3400+129.9725/+30.3465+129.9800/+30.3576+130.0000/+30.3600+130.0101/+30.3690+130.0200/+30.3785+130.0400/+30.3800+130.0454/+30.3940+130.0600/+30.3994+130.0800/+30.4000+130.0822/+30.4173+130.1000/+30.4198+130.1200/+30.4200+130.1205/+30.4392+130.1400/+30.4400+130.1588/+30.4412+130.1600/+30.4598+130.1800/+30.4600+130.2000/+30.4600+130.2056/+30.4668+130.2200/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4422+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2082/+30.4118+130.2000/+30.4177+130.1800/+30.4200+130.1767/+30.4400+130.1778/+30.4422+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-08-05T09:00:00+09:00 2026-08-05T12:00:00+09:00 降灰 70 +30.4640+130.2200/+30.4600+130.2240/+30.4400+130.2398/+30.4200+130.2385/+30.4015+130.2200/+30.4001+130.2000/+30.4000+130.1998/+30.3802+130.1800/+30.3800+130.1780/+30.3620+130.1600/+30.3600+130.1400/+30.3600+130.1399/+30.3407+130.1200/+30.3400+130.1173/+30.3229+130.1000/+30.3200+130.0894/+30.3106+130.0800/+30.3007+130.0600/+30.3000+130.0581/+30.2829+130.0400/+30.2800+130.0328/+30.2674+130.0200/+30.2600+130.0018/+30.2575+130.0000/+30.2401+129.9800/+30.2400+129.9799/+30.2200+129.9680/+30.2128+129.9600/+30.2021+129.9400/+30.2000+129.9354/+30.1840+129.9200/+30.1800+129.9153/+30.1706+129.9000/+30.1644+129.8800/+30.1600+129.8701/+30.1473+129.8600/+30.1400+129.8498/+30.1316+129.8400/+30.1200+129.8208/+30.1197+129.8200/+30.1126+129.8000/+30.1053+129.7800/+30.1000+129.7705/+30.0902+129.7600/+30.0800+129.7411/+30.0795+129.7400/+30.0717+129.7200/+30.0640+129.7000/+30.0622+129.6800/+30.0600+129.6697/+30.0570+129.6600/+30.0511+129.6400/+30.0448+129.6200/+30.0400+129.6141/+30.0367+129.6000/+30.0400+129.5909/+30.0600+129.5930/+30.0642+129.6000/+30.0686+129.6200/+30.0800+129.6329/+30.1000+129.6382/+30.1012+129.6400/+30.1163+129.6600/+30.1200+129.6642/+30.1349+129.6800/+30.1400+129.6852/+30.1533+129.7000/+30.1600+129.7053/+30.1729+129.7200/+30.1800+129.7311/+30.1846+129.7400/+30.1973+129.7600/+30.2000+129.7635/+30.2122+129.7800/+30.2200+129.7926/+30.2230+129.8000/+30.2361+129.8200/+30.2400+129.8284/+30.2503+129.8400/+30.2598+129.8600/+30.2600+129.8603/+30.2758+129.8800/+30.2800+129.8861/+30.2900+129.9000/+30.2964+129.9200/+30.3000+129.9270/+30.3107+129.9400/+30.3153+129.9600/+30.3200+129.9703/+30.3292+129.9800/+30.3387+130.0000/+30.3400+130.0030/+30.3562+130.0200/+30.3600+130.0338/+30.3691+130.0400/+30.3799+130.0600/+30.3800+130.0604/+30.3993+130.0800/+30.4000+130.0845/+30.4082+130.1000/+30.4196+130.1200/+30.4200+130.1214/+30.4374+130.1400/+30.4399+130.1600/+30.4400+130.1602/+30.4597+130.1800/+30.4600+130.2000/+30.4600+130.2140/+30.4640+130.2200/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4473+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2103/+30.4097+130.2000/+30.4131+130.1800/+30.4200+130.1708/+30.4400+130.1727/+30.4473+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-08-05T12:00:00+09:00 2026-08-05T15:00:00+09:00 降灰 70 +30.4598+130.1800/+30.4600+130.2000/+30.4599+130.2200/+30.4400+130.2398/+30.4200+130.2380/+30.4020+130.2200/+30.4001+130.2000/+30.4000+130.1997/+30.3804+130.1800/+30.3800+130.1755/+30.3645+130.1600/+30.3602+130.1400/+30.3600+130.1387/+30.3414+130.1200/+30.3400+130.1069/+30.3331+130.1000/+30.3207+130.0800/+30.3200+130.0771/+30.3035+130.0600/+30.3000+130.0461/+30.2940+130.0400/+30.2814+130.0200/+30.2800+130.0156/+30.2655+130.0000/+30.2600+129.9957/+30.2438+129.9800/+30.2400+129.9687/+30.2283+129.9600/+30.2200+129.9514/+30.2116+129.9400/+30.2038+129.9200/+30.2000+129.9128/+30.1804+129.9000/+30.1800+129.8994/+30.1713+129.8800/+30.1632+129.8600/+30.1600+129.8497/+30.1508+129.8400/+30.1400+129.8314/+30.1268+129.8200/+30.1200+129.8065/+30.1177+129.8000/+30.1101+129.7800/+30.1007+129.7600/+30.1000+129.7588/+30.0837+129.7400/+30.0800+129.7344/+30.0722+129.7200/+30.0645+129.7000/+30.0600+129.6873/+30.0553+129.6800/+30.0400+129.6602/+30.0398+129.6600/+30.0308+129.6400/+30.0250+129.6200/+30.0200+129.6059/+30.0176+129.6000/+30.0093+129.5800/+30.0000+129.5727/+29.9917+129.5600/+29.9868+129.5400/+29.9884+129.5200/+29.9927+129.5000/+30.0000+129.4955/+30.0032+129.5000/+30.0127+129.5200/+30.0200+129.5291/+30.0345+129.5400/+30.0400+129.5438/+30.0561+129.5600/+30.0600+129.5636/+30.0686+129.5800/+30.0785+129.6000/+30.0800+129.6022/+30.1000+129.6173/+30.1036+129.6200/+30.1200+129.6384/+30.1210+129.6400/+30.1320+129.6600/+30.1400+129.6712/+30.1488+129.6800/+30.1600+129.6922/+30.1655+129.7000/+30.1800+129.7194/+30.1804+129.7200/+30.1897+129.7400/+30.2000+129.7540/+30.2084+129.7600/+30.2200+129.7748/+30.2219+129.7800/+30.2300+129.8000/+30.2400+129.8165/+30.2459+129.8200/+30.2600+129.8365/+30.2616+129.8400/+30.2676+129.8600/+30.2797+129.8800/+30.2800+129.8803/+30.2944+129.9000/+30.2984+129.9200/+30.3000+129.9226/+30.3151+129.9400/+30.3181+129.9600/+30.3200+129.9648/+30.3343+129.9800/+30.3398+130.0000/+30.3400+130.0005/+30.3579+130.0200/+30.3600+130.0276/+30.3722+130.0400/+30.3795+130.0600/+30.3800+130.0614/+30.3982+130.0800/+30.4000+130.0964/+30.4036+130.1000/+30.4196+130.1200/+30.4200+130.1219/+30.4381+130.1400/+30.4399+130.1600/+30.4400+130.1602/+30.4598+130.1800/ 南西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4465+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2117/+30.4083+130.2000/+30.4098+130.1800/+30.4200+130.1664/+30.4400+130.1735/+30.4465+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-08-05T15:00:00+09:00 2026-08-05T18:00:00+09:00 降灰 70 +30.4598+130.1800/+30.4599+130.2000/+30.4598+130.2200/+30.4400+130.2397/+30.4200+130.2378/+30.4022+130.2200/+30.4001+130.2000/+30.4000+130.1997/+30.3803+130.1800/+30.3800+130.1770/+30.3630+130.1600/+30.3601+130.1400/+30.3600+130.1393/+30.3411+130.1200/+30.3400+130.1131/+30.3270+130.1000/+30.3204+130.0800/+30.3200+130.0786/+30.3023+130.0600/+30.3000+130.0491/+30.2913+130.0400/+30.2810+130.0200/+30.2800+130.0170/+30.2645+130.0000/+30.2600+129.9963/+30.2435+129.9800/+30.2400+129.9673/+30.2304+129.9600/+30.2200+129.9495/+30.2130+129.9400/+30.2048+129.9200/+30.2000+129.9102/+30.1842+129.9000/+30.1800+129.8945/+30.1736+129.8800/+30.1662+129.8600/+30.1622+129.8400/+30.1600+129.8351/+30.1400+129.8228/+30.1362+129.8200/+30.1237+129.8000/+30.1200+129.7915/+30.1157+129.7800/+30.1098+129.7600/+30.1024+129.7400/+30.1000+129.7365/+30.0818+129.7200/+30.0800+129.7175/+30.0714+129.7000/+30.0652+129.6800/+30.0600+129.6644/+30.0577+129.6600/+30.0472+129.6400/+30.0400+129.6304/+30.0329+129.6200/+30.0235+129.6000/+30.0200+129.5829/+30.0192+129.5800/+30.0108+129.5600/+30.0000+129.5456/+29.9962+129.5400/+29.9858+129.5200/+29.9800+129.5084/+29.9759+129.5000/+29.9757+129.4800/+29.9600+129.4601/+29.9599+129.4600/+29.9590+129.4400/+29.9600+129.4393/+29.9608+129.4400/+29.9800+129.4591/+30.0000+129.4591/+30.0007+129.4600/+30.0133+129.4800/+30.0200+129.4912/+30.0251+129.5000/+30.0400+129.5186/+30.0418+129.5200/+30.0600+129.5325/+30.0653+129.5400/+30.0753+129.5600/+30.0800+129.5687/+30.0877+129.5800/+30.1000+129.5928/+30.1060+129.6000/+30.1200+129.6141/+30.1243+129.6200/+30.1348+129.6400/+30.1400+129.6499/+30.1481+129.6600/+30.1600+129.6705/+30.1690+129.6800/+30.1793+129.7000/+30.1800+129.7014/+30.1893+129.7200/+30.1988+129.7400/+30.2000+129.7413/+30.2200+129.7567/+30.2216+129.7600/+30.2287+129.7800/+30.2344+129.8000/+30.2400+129.8092/+30.2566+129.8200/+30.2600+129.8244/+30.2669+129.8400/+30.2714+129.8600/+30.2800+129.8739/+30.2853+129.8800/+30.2955+129.9000/+30.2989+129.9200/+30.3000+129.9216/+30.3159+129.9400/+30.3184+129.9600/+30.3200+129.9643/+30.3349+129.9800/+30.3396+130.0000/+30.3400+130.0007/+30.3581+130.0200/+30.3600+130.0284/+30.3715+130.0400/+30.3794+130.0600/+30.3800+130.0618/+30.3980+130.0800/+30.4000+130.0967/+30.4033+130.1000/+30.4195+130.1200/+30.4200+130.1221/+30.4379+130.1400/+30.4399+130.1600/+30.4400+130.1602/+30.4598+130.1800/ 南西 90 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4496+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2117/+30.4083+130.2000/+30.4095+130.1800/+30.4200+130.1661/+30.4400+130.1704/+30.4496+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、５日０９時から１２時までは火口から南西方向に降灰が予想されます。 　５日０時から５日１８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 　０５日００時から０３時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日０３時から０６時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日０６時から０９時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日０９時から１２時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日１２時から１５時まで　南西　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０５日１５時から１８時まで　南西　　　　　　９０ｋｍ　　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。