2026-08-04T11:00:00Z 通常 気象庁本庁 気象庁 2026-08-04T20:00:00+09:00 2026-08-04T21:00:00+09:00 2026-08-05T15:00:00+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、４日２１時から２４時までは火口から南西方向、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 2026-08-04T21:00:00+09:00 2026-08-05T00:00:00+09:00 降灰 70 +30.4745+130.2000/+30.4756+130.2200/+30.4600+130.2356/+30.4400+130.2398/+30.4200+130.2322/+30.4078+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1780/+30.3821+130.1600/+30.3803+130.1400/+30.3800+130.1225/+30.3775+130.1200/+30.3620+130.1000/+30.3605+130.0800/+30.3600+130.0717/+30.3497+130.0600/+30.3420+130.0400/+30.3403+130.0200/+30.3400+130.0178/+30.3252+130.0000/+30.3214+129.9800/+30.3200+129.9719/+30.3107+129.9600/+30.3011+129.9400/+30.3000+129.9350/+30.2875+129.9200/+30.2800+129.9084/+30.2750+129.9000/+30.2681+129.8800/+30.2635+129.8600/+30.2600+129.8543/+30.2492+129.8400/+30.2456+129.8200/+30.2420+129.8000/+30.2400+129.7936/+30.2283+129.7800/+30.2200+129.7663/+30.2173+129.7600/+30.2149+129.7400/+30.2129+129.7200/+30.2100+129.7000/+30.2046+129.6800/+30.2000+129.6718/+30.1940+129.6600/+30.1898+129.6400/+30.1895+129.6200/+30.1892+129.6000/+30.1922+129.5800/+30.1966+129.5600/+30.2000+129.5529/+30.2029+129.5600/+30.2090+129.5800/+30.2162+129.6000/+30.2200+129.6077/+30.2314+129.6200/+30.2400+129.6248/+30.2564+129.6400/+30.2600+129.6430/+30.2687+129.6600/+30.2771+129.6800/+30.2800+129.6886/+30.2834+129.7000/+30.2935+129.7200/+30.3000+129.7278/+30.3058+129.7400/+30.3106+129.7600/+30.3176+129.7800/+30.3200+129.7870/+30.3301+129.8000/+30.3364+129.8200/+30.3400+129.8288/+30.3464+129.8400/+30.3529+129.8600/+30.3571+129.8800/+30.3600+129.8911/+30.3694+129.9000/+30.3681+129.9200/+30.3766+129.9400/+30.3792+129.9600/+30.3800+129.9640/+30.3934+129.9800/+30.3984+130.0000/+30.3997+130.0200/+30.4000+130.0213/+30.4168+130.0400/+30.4192+130.0600/+30.4200+130.0796/+30.4204+130.0800/+30.4388+130.1000/+30.4397+130.1200/+30.4400+130.1256/+30.4544+130.1400/+30.4597+130.1600/+30.4599+130.1800/+30.4600+130.1855/+30.4745+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4430+130.1800/+30.4583+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4215+130.2000/+30.4300+130.1800/+30.4400+130.1764/+30.4430+130.1800/ 西 4 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 +30.4704+130.2000/+30.4735+130.2200/+30.4600+130.2335/+30.4400+130.2399/+30.4200+130.2371/+30.4029+130.2200/+30.4001+130.2000/+30.4000+130.1920/+30.3880+130.1800/+30.3803+130.1600/+30.3800+130.1422/+30.3778+130.1400/+30.3610+130.1200/+30.3601+130.1000/+30.3600+130.0996/+30.3419+130.0800/+30.3401+130.0600/+30.3400+130.0596/+30.3226+130.0400/+30.3200+130.0229/+30.3173+130.0200/+30.3032+130.0000/+30.3000+129.9827/+30.2976+129.9800/+30.2800+129.9697/+30.2695+129.9600/+30.2632+129.9400/+30.2600+129.9299/+30.2542+129.9200/+30.2463+129.9000/+30.2418+129.8800/+30.2400+129.8753/+30.2223+129.8600/+30.2200+129.8557/+30.2142+129.8400/+30.2096+129.8200/+30.2055+129.8000/+30.2000+129.7830/+30.1964+129.7800/+30.1824+129.7600/+30.1800+129.7517/+30.1768+129.7400/+30.1735+129.7200/+30.1699+129.7000/+30.1689+129.6800/+30.1670+129.6600/+30.1651+129.6400/+30.1600+129.6205/+30.1599+129.6200/+30.1520+129.6000/+30.1600+129.5916/+30.1677+129.6000/+30.1800+129.6145/+30.2000+129.6156/+30.2028+129.6200/+30.2131+129.6400/+30.2200+129.6572/+30.2211+129.6600/+30.2302+129.6800/+30.2400+129.6981/+30.2412+129.7000/+30.2600+129.7171/+30.2623+129.7200/+30.2690+129.7400/+30.2752+129.7600/+30.2800+129.7662/+30.2944+129.7800/+30.3000+129.7901/+30.3037+129.8000/+30.3113+129.8200/+30.3183+129.8400/+30.3200+129.8437/+30.3285+129.8600/+30.3378+129.8800/+30.3400+129.8849/+30.3482+129.9000/+30.3530+129.9200/+30.3559+129.9400/+30.3598+129.9600/+30.3600+129.9605/+30.3754+129.9800/+30.3791+130.0000/+30.3800+130.0039/+30.3934+130.0200/+30.3986+130.0400/+30.4000+130.0492/+30.4102+130.0600/+30.4187+130.0800/+30.4199+130.1000/+30.4200+130.1004/+30.4388+130.1200/+30.4398+130.1400/+30.4400+130.1410/+30.4590+130.1600/+30.4599+130.1800/+30.4600+130.1896/+30.4704+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4442+130.1800/+30.4585+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4203+130.2000/+30.4258+130.1800/+30.4400+130.1758/+30.4442+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 +30.4620+130.2000/+30.4691+130.2200/+30.4600+130.2291/+30.4400+130.2398/+30.4200+130.2378/+30.4022+130.2200/+30.4001+130.2000/+30.4000+130.1982/+30.3818+130.1800/+30.3802+130.1600/+30.3800+130.1577/+30.3623+130.1400/+30.3603+130.1200/+30.3600+130.1176/+30.3428+130.1000/+30.3404+130.0800/+30.3400+130.0780/+30.3229+130.0600/+30.3201+130.0400/+30.3200+130.0396/+30.3028+130.0200/+30.3000+130.0062/+30.2939+130.0000/+30.2819+129.9800/+30.2800+129.9769/+30.2600+129.9618/+30.2584+129.9600/+30.2467+129.9400/+30.2420+129.9200/+30.2400+129.9138/+30.2256+129.9000/+30.2200+129.8937/+30.2107+129.8800/+30.2044+129.8600/+30.2000+129.8461/+30.1945+129.8400/+30.1800+129.8218/+30.1791+129.8200/+30.1683+129.8000/+30.1643+129.7800/+30.1602+129.7600/+30.1600+129.7592/+30.1529+129.7400/+30.1422+129.7200/+30.1400+129.7168/+30.1316+129.7000/+30.1308+129.6800/+30.1297+129.6600/+30.1303+129.6400/+30.1349+129.6200/+30.1400+129.6095/+30.1546+129.6200/+30.1600+129.6224/+30.1683+129.6400/+30.1800+129.6579/+30.1818+129.6600/+30.2000+129.6710/+30.2082+129.6800/+30.2200+129.6997/+30.2201+129.7000/+30.2298+129.7200/+30.2380+129.7400/+30.2400+129.7434/+30.2501+129.7600/+30.2600+129.7732/+30.2634+129.7800/+30.2701+129.8000/+30.2800+129.8139/+30.2888+129.8200/+30.2931+129.8400/+30.2993+129.8600/+30.3000+129.8612/+30.3192+129.8800/+30.3200+129.8813/+30.3315+129.9000/+30.3378+129.9200/+30.3374+129.9400/+30.3400+129.9479/+30.3506+129.9600/+30.3581+129.9800/+30.3600+129.9884/+30.3700+130.0000/+30.3784+130.0200/+30.3800+130.0283/+30.3911+130.0400/+30.3989+130.0600/+30.4000+130.0674/+30.4124+130.0800/+30.4193+130.1000/+30.4200+130.1071/+30.4328+130.1200/+30.4397+130.1400/+30.4400+130.1439/+30.4561+130.1600/+30.4599+130.1800/+30.4600+130.1980/+30.4620+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4422+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2013/+30.4187+130.2000/+30.4196+130.1800/+30.4200+130.1792/+30.4400+130.1778/+30.4422+130.1800/ 南西 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 +30.4618+130.2200/+30.4600+130.2218/+30.4400+130.2398/+30.4200+130.2380/+30.4020+130.2200/+30.4001+130.2000/+30.4000+130.1992/+30.3808+130.1800/+30.3801+130.1600/+30.3800+130.1594/+30.3608+130.1400/+30.3600+130.1284/+30.3516+130.1200/+30.3408+130.1000/+30.3400+130.0953/+30.3249+130.0800/+30.3204+130.0600/+30.3200+130.0583/+30.3031+130.0400/+30.3000+130.0253/+30.2948+130.0200/+30.2820+130.0000/+30.2800+129.9920/+30.2631+129.9800/+30.2600+129.9780/+30.2462+129.9600/+30.2414+129.9400/+30.2400+129.9341/+30.2276+129.9200/+30.2200+129.9102/+30.2126+129.9000/+30.2044+129.8800/+30.2000+129.8666/+30.1914+129.8600/+30.1800+129.8434/+30.1785+129.8400/+30.1712+129.8200/+30.1614+129.8000/+30.1600+129.7945/+30.1534+129.7800/+30.1430+129.7600/+30.1400+129.7544/+30.1323+129.7400/+30.1244+129.7200/+30.1200+129.7064/+30.1181+129.7000/+30.1162+129.6800/+30.1128+129.6600/+30.1062+129.6400/+30.1000+129.6316/+30.0950+129.6200/+30.0875+129.6000/+30.0860+129.5800/+30.0838+129.5600/+30.0906+129.5400/+30.1000+129.5337/+30.1052+129.5400/+30.1149+129.5600/+30.1200+129.5746/+30.1227+129.5800/+30.1400+129.5988/+30.1409+129.6000/+30.1597+129.6200/+30.1600+129.6202/+30.1690+129.6400/+30.1783+129.6600/+30.1800+129.6627/+30.1926+129.6800/+30.2000+129.6881/+30.2094+129.7000/+30.2200+129.7122/+30.2250+129.7200/+30.2339+129.7400/+30.2373+129.7600/+30.2400+129.7635/+30.2570+129.7800/+30.2600+129.7855/+30.2655+129.8000/+30.2743+129.8200/+30.2796+129.8400/+30.2800+129.8405/+30.2921+129.8600/+30.2998+129.8800/+30.3000+129.8803/+30.3195+129.9000/+30.3200+129.9008/+30.3304+129.9200/+30.3291+129.9400/+30.3372+129.9600/+30.3400+129.9688/+30.3500+129.9800/+30.3584+130.0000/+30.3600+130.0062/+30.3729+130.0200/+30.3790+130.0400/+30.3800+130.0436/+30.3959+130.0600/+30.3996+130.0800/+30.4000+130.0815/+30.4181+130.1000/+30.4199+130.1200/+30.4200+130.1203/+30.4394+130.1400/+30.4400+130.1534/+30.4466+130.1600/+30.4599+130.1800/+30.4600+130.2000/+30.4600+130.2156/+30.4618+130.2200/ 南西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4473+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2063/+30.4137+130.2000/+30.4160+130.1800/+30.4200+130.1736/+30.4400+130.1727/+30.4473+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 +30.4598+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+130.1996/+30.3804+130.1800/+30.3800+130.1745/+30.3655+130.1600/+30.3603+130.1400/+30.3600+130.1384/+30.3419+130.1200/+30.3400+130.1061/+30.3339+130.1000/+30.3208+130.0800/+30.3200+130.0771/+30.3039+130.0600/+30.3000+130.0454/+30.2948+130.0400/+30.2820+130.0200/+30.2800+130.0143/+30.2666+130.0000/+30.2600+129.9952/+30.2445+129.9800/+30.2400+129.9642/+30.2344+129.9600/+30.2200+129.9451/+30.2163+129.9400/+30.2064+129.9200/+30.2000+129.9076/+30.1884+129.9000/+30.1800+129.8892/+30.1758+129.8800/+30.1661+129.8600/+30.1602+129.8400/+30.1600+129.8394/+30.1402+129.8200/+30.1400+129.8197/+30.1274+129.8000/+30.1200+129.7842/+30.1182+129.7800/+30.1101+129.7600/+30.1024+129.7400/+30.1000+129.7357/+30.0877+129.7200/+30.0800+129.7064/+30.0770+129.7000/+30.0724+129.6800/+30.0656+129.6600/+30.0600+129.6450/+30.0575+129.6400/+30.0469+129.6200/+30.0400+129.6114/+30.0349+129.6000/+30.0355+129.5800/+30.0364+129.5600/+30.0400+129.5504/+30.0600+129.5563/+30.0621+129.5600/+30.0755+129.5800/+30.0800+129.5840/+30.1000+129.5952/+30.1035+129.6000/+30.1149+129.6200/+30.1200+129.6296/+30.1254+129.6400/+30.1400+129.6599/+30.1401+129.6600/+30.1600+129.6746/+30.1648+129.6800/+30.1767+129.7000/+30.1800+129.7060/+30.1881+129.7200/+30.2000+129.7387/+30.2012+129.7400/+30.2200+129.7590/+30.2204+129.7600/+30.2278+129.7800/+30.2349+129.8000/+30.2400+129.8062/+30.2589+129.8200/+30.2600+129.8216/+30.2680+129.8400/+30.2741+129.8600/+30.2800+129.8676/+30.2895+129.8800/+30.2975+129.9000/+30.3000+129.9091/+30.3101+129.9200/+30.3167+129.9400/+30.3200+129.9548/+30.3254+129.9600/+30.3379+129.9800/+30.3400+129.9856/+30.3533+130.0000/+30.3595+130.0200/+30.3600+130.0214/+30.3771+130.0400/+30.3800+130.0525/+30.3872+130.0600/+30.3991+130.0800/+30.4000+130.0838/+30.4156+130.1000/+30.4197+130.1200/+30.4200+130.1209/+30.4389+130.1400/+30.4400+130.1600/+30.4400+130.1601/+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 +30.4476+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2090/+30.4110+130.2000/+30.4121+130.1800/+30.4200+130.1691/+30.4400+130.1724/+30.4476+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+130.2397/+30.4200+130.2378/+30.4022+130.2200/+30.4001+130.2000/+30.4000+130.1998/+30.3803+130.1800/+30.3800+130.1773/+30.3627+130.1600/+30.3601+130.1400/+30.3600+130.1395/+30.3411+130.1200/+30.3400+130.1143/+30.3258+130.1000/+30.3203+130.0800/+30.3200+130.0790/+30.3025+130.0600/+30.3000+130.0508/+30.2897+130.0400/+30.2811+130.0200/+30.2800+130.0172/+30.2648+130.0000/+30.2600+129.9949/+30.2450+129.9800/+30.2400+129.9631/+30.2359+129.9600/+30.2200+129.9419/+30.2186+129.9400/+30.2072+129.9200/+30.2000+129.9006/+30.1992+129.9000/+30.1836+129.8800/+30.1800+129.8757/+30.1717+129.8600/+30.1661+129.8400/+30.1601+129.8200/+30.1600+129.8196/+30.1437+129.8000/+30.1400+129.7934/+30.1298+129.7800/+30.1203+129.7600/+30.1200+129.7589/+30.1145+129.7400/+30.1086+129.7200/+30.1010+129.7000/+30.1000+129.6981/+30.0874+129.6800/+30.0800+129.6654/+30.0777+129.6600/+30.0723+129.6400/+30.0678+129.6200/+30.0610+129.6000/+30.0600+129.5957/+30.0546+129.5800/+30.0404+129.5600/+30.0400+129.5592/+30.0354+129.5400/+30.0357+129.5200/+30.0365+129.5000/+30.0400+129.4976/+30.0437+129.5000/+30.0600+129.5170/+30.0612+129.5200/+30.0737+129.5400/+30.0800+129.5475/+30.1000+129.5564/+30.1028+129.5600/+30.1160+129.5800/+30.1200+129.5877/+30.1255+129.6000/+30.1378+129.6200/+30.1400+129.6224/+30.1580+129.6400/+30.1600+129.6418/+30.1715+129.6600/+30.1800+129.6768/+30.1814+129.6800/+30.1889+129.7000/+30.2000+129.7142/+30.2077+129.7200/+30.2200+129.7351/+30.2226+129.7400/+30.2282+129.7600/+30.2368+129.7800/+30.2400+129.7871/+30.2514+129.8000/+30.2600+129.8067/+30.2682+129.8200/+30.2736+129.8400/+30.2796+129.8600/+30.2800+129.8606/+30.2936+129.8800/+30.2999+129.9000/+30.3000+129.9004/+30.3175+129.9200/+30.3175+129.9400/+30.3200+129.9497/+30.3295+129.9600/+30.3383+129.9800/+30.3400+129.9855/+30.3535+130.0000/+30.3592+130.0200/+30.3600+130.0219/+30.3770+130.0400/+30.3800+130.0600/+30.3800+130.0601/+30.3987+130.0800/+30.4000+130.0869/+30.4131+130.1000/+30.4196+130.1200/+30.4200+130.1215/+30.4384+130.1400/+30.4400+130.1600/+30.4400+130.1601/+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 +30.4489+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2100/+30.4100+130.2000/+30.4117+130.1800/+30.4200+130.1678/+30.4400+130.1711/+30.4489+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、４日２１時から２４時までは火口から南西方向、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。 　４日２１時から５日１５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 　０４日２１時から２４時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　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　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日０６時から０９時まで　南西　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０５日０９時から１２時まで　南西　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０５日１２時から１５時まで　南西　　　　　　８０ｋｍ　　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。