2026-08-03T23:00:00Z 通常 気象庁本庁 気象庁 2026-08-04T08:00:00+09:00 2026-08-04T09:00:00+09:00 2026-08-05T03:00:00+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０９時から１２時までは火口から南西方向、４日２１時から２４時までは火口から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 2026-08-04T09:00:00+09:00 2026-08-04T12:00:00+09:00 降灰 70 +30.4748+130.2000/+30.4747+130.2200/+30.4600+130.2347/+30.4400+130.2398/+30.4200+130.2296/+30.4104+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1780/+30.3820+130.1600/+30.3803+130.1400/+30.3800+130.1287/+30.3713+130.1200/+30.3614+130.1000/+30.3603+130.0800/+30.3600+130.0779/+30.3441+130.0600/+30.3411+130.0400/+30.3400+130.0317/+30.3298+130.0200/+30.3226+130.0000/+30.3200+129.9892/+30.3120+129.9800/+30.3045+129.9600/+30.3000+129.9484/+30.2886+129.9400/+30.2804+129.9200/+30.2800+129.9188/+30.2712+129.9000/+30.2653+129.8800/+30.2601+129.8600/+30.2600+129.8598/+30.2480+129.8400/+30.2441+129.8200/+30.2400+129.8000/+30.2280+129.7800/+30.2200+129.7643/+30.2182+129.7600/+30.2150+129.7400/+30.2117+129.7200/+30.2077+129.7000/+30.2017+129.6800/+30.2000+129.6762/+30.1925+129.6600/+30.1877+129.6400/+30.1854+129.6200/+30.1831+129.6000/+30.1855+129.5800/+30.1891+129.5600/+30.1953+129.5400/+30.2000+129.5306/+30.2035+129.5400/+30.2117+129.5600/+30.2200+129.5746/+30.2237+129.5800/+30.2400+129.5985/+30.2412+129.6000/+30.2600+129.6191/+30.2605+129.6200/+30.2699+129.6400/+30.2767+129.6600/+30.2800+129.6700/+30.2831+129.6800/+30.2890+129.7000/+30.3000+129.7162/+30.3020+129.7200/+30.3103+129.7400/+30.3164+129.7600/+30.3200+129.7673/+30.3312+129.7800/+30.3400+129.7987/+30.3404+129.8000/+30.3429+129.8200/+30.3511+129.8400/+30.3557+129.8600/+30.3600+129.8716/+30.3684+129.8800/+30.3797+129.9000/+30.3766+129.9200/+30.3800+129.9370/+30.3821+129.9400/+30.3938+129.9600/+30.3977+129.9800/+30.4000+129.9990/+30.4008+130.0000/+30.4152+130.0200/+30.4187+130.0400/+30.4200+130.0600/+30.4369+130.0800/+30.4393+130.1000/+30.4399+130.1200/+30.4400+130.1209/+30.4583+130.1400/+30.4598+130.1600/+30.4599+130.1800/+30.4600+130.1852/+30.4748+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4480+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4249+130.1800/+30.4400+130.1687/+30.4480+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T12:00:00+09:00 2026-08-04T15:00:00+09:00 降灰 70 +30.4765+130.2000/+30.4764+130.2200/+30.4600+130.2364/+30.4400+130.2398/+30.4200+130.2220/+30.4180+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1711/+30.3889+130.1600/+30.3807+130.1400/+30.3802+130.1200/+30.3800+130.1151/+30.3655+130.1000/+30.3612+130.0800/+30.3602+130.0600/+30.3600+130.0575/+30.3453+130.0400/+30.3416+130.0200/+30.3400+130.0038/+30.3368+130.0000/+30.3254+129.9800/+30.3215+129.9600/+30.3200+129.9503/+30.3115+129.9400/+30.3017+129.9200/+30.3000+129.9084/+30.2931+129.9000/+30.2828+129.8800/+30.2800+129.8718/+30.2751+129.8600/+30.2669+129.8400/+30.2600+129.8230/+30.2591+129.8200/+30.2544+129.8000/+30.2519+129.7800/+30.2496+129.7600/+30.2440+129.7400/+30.2400+129.7239/+30.2390+129.7200/+30.2344+129.7000/+30.2318+129.6800/+30.2292+129.6600/+30.2285+129.6400/+30.2299+129.6200/+30.2320+129.6000/+30.2340+129.5800/+30.2364+129.5600/+30.2400+129.5464/+30.2600+129.5590/+30.2603+129.5600/+30.2641+129.5800/+30.2682+129.6000/+30.2773+129.6200/+30.2800+129.6251/+30.2889+129.6400/+30.3000+129.6530/+30.3039+129.6600/+30.3136+129.6800/+30.3200+129.6991/+30.3203+129.7000/+30.3200+129.7051/+30.3196+129.7200/+30.3200+129.7209/+30.3340+129.7400/+30.3400+129.7554/+30.3413+129.7600/+30.3478+129.7800/+30.3518+129.8000/+30.3546+129.8200/+30.3581+129.8400/+30.3600+129.8521/+30.3646+129.8600/+30.3796+129.8800/+30.3800+129.8810/+30.3890+129.9000/+30.3800+129.9137/+30.3791+129.9200/+30.3800+129.9260/+30.3889+129.9400/+30.3962+129.9600/+30.3986+129.9800/+30.4000+129.9935/+30.4053+130.0000/+30.4166+130.0200/+30.4191+130.0400/+30.4200+130.0591/+30.4209+130.0600/+30.4376+130.0800/+30.4395+130.1000/+30.4399+130.1200/+30.4400+130.1209/+30.4587+130.1400/+30.4598+130.1600/+30.4600+130.1800/+30.4600+130.1835/+30.4765+130.2000/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4462+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4302+130.1800/+30.4400+130.1712/+30.4462+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T15:00:00+09:00 2026-08-04T18:00:00+09:00 降灰 70 +30.4747+130.2000/+30.4758+130.2200/+30.4600+130.2358/+30.4400+130.2398/+30.4200+130.2340/+30.4060+130.2200/+30.4001+130.2000/+30.4000+130.1800/+30.4000+130.1794/+30.3808+130.1600/+30.3802+130.1400/+30.3800+130.1375/+30.3629+130.1200/+30.3605+130.1000/+30.3600+130.0946/+30.3463+130.0800/+30.3411+130.0600/+30.3400+130.0528/+30.3282+130.0400/+30.3217+130.0200/+30.3200+130.0116/+30.3102+130.0000/+30.3019+129.9800/+30.3000+129.9718/+30.2800+129.9603/+30.2797+129.9600/+30.2701+129.9400/+30.2648+129.9200/+30.2600+129.9015/+30.2592+129.9000/+30.2504+129.8800/+30.2428+129.8600/+30.2400+129.8491/+30.2331+129.8400/+30.2241+129.8200/+30.2200+129.8067/+30.2183+129.8000/+30.2138+129.7800/+30.2110+129.7600/+30.2083+129.7400/+30.2048+129.7200/+30.2000+129.7066/+30.1973+129.7000/+30.1941+129.6800/+30.1910+129.6600/+30.1906+129.6400/+30.1932+129.6200/+30.1968+129.6000/+30.1987+129.5800/+30.2000+129.5694/+30.2011+129.5800/+30.2033+129.6000/+30.2110+129.6200/+30.2200+129.6336/+30.2262+129.6400/+30.2400+129.6490/+30.2498+129.6600/+30.2600+129.6699/+30.2646+129.6800/+30.2718+129.7000/+30.2796+129.7200/+30.2800+129.7209/+30.2894+129.7400/+30.2980+129.7600/+30.3000+129.7642/+30.3059+129.7800/+30.3108+129.8000/+30.3200+129.8184/+30.3211+129.8200/+30.3314+129.8400/+30.3394+129.8600/+30.3400+129.8612/+30.3498+129.8800/+30.3551+129.9000/+30.3565+129.9200/+30.3595+129.9400/+30.3600+129.9414/+30.3745+129.9600/+30.3787+129.9800/+30.3800+129.9869/+30.3910+130.0000/+30.3980+130.0200/+30.3999+130.0400/+30.4000+130.0402/+30.4175+130.0600/+30.4195+130.0800/+30.4200+130.0838/+30.4354+130.1000/+30.4395+130.1200/+30.4400+130.1400/+30.4596+130.1600/+30.4599+130.1800/+30.4600+130.1853/+30.4747+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/+30.4213+130.2000/+30.4344+130.1800/+30.4400+130.1770/+30.4422+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T18:00:00+09:00 2026-08-04T21:00:00+09:00 降灰 70 +30.4746+130.2000/+30.4758+130.2200/+30.4600+130.2358/+30.4400+130.2399/+30.4200+130.2330/+30.4070+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1782/+30.3818+130.1600/+30.3803+130.1400/+30.3800+130.1292/+30.3709+130.1200/+30.3611+130.1000/+30.3602+130.0800/+30.3600+130.0789/+30.3430+130.0600/+30.3405+130.0400/+30.3400+130.0367/+30.3255+130.0200/+30.3213+130.0000/+30.3200+129.9929/+30.3091+129.9800/+30.3020+129.9600/+30.3000+129.9548/+30.2800+129.9403/+30.2798+129.9400/+30.2698+129.9200/+30.2634+129.9000/+30.2600+129.8888/+30.2551+129.8800/+30.2460+129.8600/+30.2415+129.8400/+30.2400+129.8354/+30.2261+129.8200/+30.2200+129.8074/+30.2175+129.8000/+30.2123+129.7800/+30.2086+129.7600/+30.2049+129.7400/+30.2000+129.7238/+30.1980+129.7200/+30.1894+129.7000/+30.1859+129.6800/+30.1826+129.6600/+30.1802+129.6400/+30.1800+129.6376/+30.1783+129.6200/+30.1752+129.6000/+30.1800+129.5890/+30.1868+129.5800/+30.2000+129.5710/+30.2056+129.5800/+30.2156+129.6000/+30.2200+129.6200/+30.2256+129.6400/+30.2350+129.6600/+30.2400+129.6653/+30.2530+129.6800/+30.2600+129.6872/+30.2658+129.7000/+30.2783+129.7200/+30.2800+129.7252/+30.2860+129.7400/+30.2981+129.7600/+30.3000+129.7630/+30.3073+129.7800/+30.3123+129.8000/+30.3200+129.8186/+30.3210+129.8200/+30.3316+129.8400/+30.3375+129.8600/+30.3400+129.8639/+30.3506+129.8800/+30.3564+129.9000/+30.3577+129.9200/+30.3600+129.9357/+30.3634+129.9400/+30.3766+129.9600/+30.3795+129.9800/+30.3800+129.9819/+30.3955+130.0000/+30.3989+130.0200/+30.4000+130.0300/+30.4091+130.0400/+30.4186+130.0600/+30.4197+130.0800/+30.4200+130.0818/+30.4375+130.1000/+30.4397+130.1200/+30.4400+130.1295/+30.4505+130.1400/+30.4597+130.1600/+30.4599+130.1800/+30.4600+130.1854/+30.4746+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4433+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4316+130.1800/+30.4400+130.1767/+30.4433+130.1800/ 西 4 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 +30.4747+130.2000/+30.4756+130.2200/+30.4600+130.2356/+30.4400+130.2398/+30.4200+130.2294/+30.4106+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1742/+30.3858+130.1600/+30.3805+130.1400/+30.3802+130.1200/+30.3800+130.1146/+30.3657+130.1000/+30.3611+130.0800/+30.3604+130.0600/+30.3600+130.0538/+30.3480+130.0400/+30.3419+130.0200/+30.3406+130.0000/+30.3400+129.9939/+30.3286+129.9800/+30.3225+129.9600/+30.3208+129.9400/+30.3200+129.9381/+30.3032+129.9200/+30.3008+129.9000/+30.3000+129.8960/+30.2865+129.8800/+30.2800+129.8645/+30.2779+129.8600/+30.2728+129.8400/+30.2611+129.8200/+30.2600+129.8169/+30.2552+129.8000/+30.2514+129.7800/+30.2480+129.7600/+30.2400+129.7445/+30.2342+129.7400/+30.2283+129.7200/+30.2238+129.7000/+30.2229+129.6800/+30.2218+129.6600/+30.2209+129.6400/+30.2200+129.6228/+30.2198+129.6200/+30.2173+129.6000/+30.2200+129.5912/+30.2268+129.5800/+30.2400+129.5720/+30.2507+129.5800/+30.2600+129.5864/+30.2659+129.6000/+30.2729+129.6200/+30.2794+129.6400/+30.2800+129.6417/+30.2876+129.6600/+30.3000+129.6763/+30.3033+129.6800/+30.3154+129.7000/+30.3136+129.7200/+30.3200+129.7367/+30.3231+129.7400/+30.3352+129.7600/+30.3400+129.7674/+30.3452+129.7800/+30.3499+129.8000/+30.3527+129.8200/+30.3564+129.8400/+30.3590+129.8600/+30.3600+129.8630/+30.3767+129.8800/+30.3800+129.8866/+30.3867+129.9000/+30.3800+129.9072/+30.3774+129.9200/+30.3794+129.9400/+30.3800+129.9436/+30.3927+129.9600/+30.3979+129.9800/+30.3994+130.0000/+30.4000+130.0046/+30.4138+130.0200/+30.4185+130.0400/+30.4195+130.0600/+30.4200+130.0662/+30.4332+130.0800/+30.4392+130.1000/+30.4398+130.1200/+30.4400+130.1232/+30.4568+130.1400/+30.4598+130.1600/+30.4599+130.1800/+30.4600+130.1853/+30.4747+130.2000/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4448+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4302+130.1800/+30.4400+130.1742/+30.4448+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 +30.4678+130.2000/+30.4717+130.2200/+30.4600+130.2317/+30.4400+130.2398/+30.4200+130.2370/+30.4030+130.2200/+30.4001+130.2000/+30.4000+130.1955/+30.3845+130.1800/+30.3803+130.1600/+30.3800+130.1535/+30.3666+130.1400/+30.3607+130.1200/+30.3600+130.1121/+30.3480+130.1000/+30.3413+130.0800/+30.3400+130.0705/+30.3297+130.0600/+30.3218+130.0400/+30.3200+130.0306/+30.3104+130.0200/+30.3028+130.0000/+30.3000+129.9894/+30.2914+129.9800/+30.2800+129.9695/+30.2696+129.9600/+30.2634+129.9400/+30.2600+129.9286/+30.2553+129.9200/+30.2480+129.9000/+30.2432+129.8800/+30.2400+129.8706/+30.2276+129.8600/+30.2200+129.8449/+30.2182+129.8400/+30.2125+129.8200/+30.2079+129.8000/+30.2034+129.7800/+30.2000+129.7712/+30.1901+129.7600/+30.1828+129.7400/+30.1800+129.7282/+30.1781+129.7200/+30.1739+129.7000/+30.1717+129.6800/+30.1682+129.6600/+30.1654+129.6400/+30.1648+129.6200/+30.1600+129.6083/+30.1577+129.6000/+30.1600+129.5963/+30.1690+129.6000/+30.1800+129.6043/+30.2000+129.6050/+30.2093+129.6200/+30.2193+129.6400/+30.2200+129.6416/+30.2285+129.6600/+30.2400+129.6773/+30.2422+129.6800/+30.2579+129.7000/+30.2600+129.7019/+30.2716+129.7200/+30.2747+129.7400/+30.2800+129.7540/+30.2842+129.7600/+30.2992+129.7800/+30.3000+129.7816/+30.3063+129.8000/+30.3140+129.8200/+30.3200+129.8352/+30.3228+129.8400/+30.3317+129.8600/+30.3400+129.8775/+30.3417+129.8800/+30.3516+129.9000/+30.3549+129.9200/+30.3579+129.9400/+30.3600+129.9483/+30.3686+129.9600/+30.3762+129.9800/+30.3798+130.0000/+30.3800+130.0006/+30.3960+130.0200/+30.3989+130.0400/+30.4000+130.0453/+30.4136+130.0600/+30.4188+130.0800/+30.4200+130.0998/+30.4202+130.1000/+30.4389+130.1200/+30.4398+130.1400/+30.4400+130.1408/+30.4590+130.1600/+30.4599+130.1800/+30.4600+130.1922/+30.4678+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4457+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2026/+30.4174+130.2000/+30.4200+130.1813/+30.4205+130.1800/+30.4400+130.1743/+30.4457+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０９時から１２時までは火口から南西方向、４日２１時から２４時までは火口から西方向に降灰が予想されます。 　４日９時から５日３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０９時から１２時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０４日１２時から１５時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０４日１５時から１８時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０４日１８時から２１時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０４日２１時から２４時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日００時から０３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。