2026-08-04T02:00:00Z 通常 気象庁本庁 気象庁 2026-08-04T11:00:00+09:00 2026-08-04T12:00:00+09:00 2026-08-05T06:00:00+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 2026-08-04T12:00:00+09:00 2026-08-04T15:00:00+09:00 降灰 70 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南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4461+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4278+130.1800/+30.4400+130.1724/+30.4461+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 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南西 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/+30.4210+130.2000/+30.4239+130.1800/+30.4400+130.1738/+30.4462+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 +30.4753+130.2000/+30.4762+130.2200/+30.4600+130.2362/+30.4400+130.2399/+30.4200+130.2313/+30.4087+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1759/+30.3841+130.1600/+30.3804+130.1400/+30.3801+130.1200/+30.3800+130.1183/+30.3625+130.1000/+30.3607+130.0800/+30.3600+130.0686/+30.3517+130.0600/+30.3423+130.0400/+30.3405+130.0200/+30.3400+130.0164/+30.3263+130.0000/+30.3213+129.9800/+30.3200+129.9708/+30.3117+129.9600/+30.3006+129.9400/+30.3000+129.9374/+30.2863+129.9200/+30.2800+129.9074/+30.2761+129.9000/+30.2690+129.8800/+30.2641+129.8600/+30.2600+129.8525/+30.2509+129.8400/+30.2475+129.8200/+30.2442+129.8000/+30.2400+129.7833/+30.2375+129.7800/+30.2232+129.7600/+30.2200+129.7451/+30.2192+129.7400/+30.2168+129.7200/+30.2137+129.7000/+30.2138+129.6800/+30.2139+129.6600/+30.2146+129.6400/+30.2200+129.6224/+30.2253+129.6200/+30.2400+129.6183/+30.2417+129.6200/+30.2600+129.6361/+30.2617+129.6400/+30.2704+129.6600/+30.2785+129.6800/+30.2800+129.6840/+30.2854+129.7000/+30.2973+129.7200/+30.3000+129.7229/+30.3072+129.7400/+30.3117+129.7600/+30.3190+129.7800/+30.3200+129.7825/+30.3321+129.8000/+30.3367+129.8200/+30.3400+129.8270/+30.3476+129.8400/+30.3539+129.8600/+30.3582+129.8800/+30.3600+129.8863/+30.3733+129.9000/+30.3718+129.9200/+30.3770+129.9400/+30.3798+129.9600/+30.3800+129.9607/+30.3950+129.9800/+30.3985+130.0000/+30.4000+130.0200/+30.4170+130.0400/+30.4193+130.0600/+30.4200+130.0711/+30.4286+130.0800/+30.4389+130.1000/+30.4398+130.1200/+30.4400+130.1239/+30.4561+130.1400/+30.4598+130.1600/+30.4599+130.1800/+30.4600+130.1847/+30.4753+130.2000/ +30.2021+129.5400/+30.2052+129.5600/+30.2068+129.5800/+30.2105+129.6000/+30.2000+129.6137/+30.1967+129.6000/+30.1961+129.5800/+30.1956+129.5600/+30.1976+129.5400/+30.2000+129.5320/+30.2021+129.5400/ 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/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4314+130.1800/+30.4400+130.1745/+30.4442+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 +30.4753+130.2000/+30.4761+130.2200/+30.4600+130.2361/+30.4400+130.2398/+30.4200+130.2305/+30.4095+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1754/+30.3846+130.1600/+30.3805+130.1400/+30.3802+130.1200/+30.3800+130.1171/+30.3638+130.1000/+30.3610+130.0800/+30.3602+130.0600/+30.3600+130.0579/+30.3444+130.0400/+30.3414+130.0200/+30.3400+130.0010/+30.3391+130.0000/+30.3247+129.9800/+30.3213+129.9600/+30.3200+129.9486/+30.3128+129.9400/+30.3018+129.9200/+30.3000+129.9084/+30.2919+129.9000/+30.2818+129.8800/+30.2800+129.8743/+30.2743+129.8600/+30.2623+129.8400/+30.2600+129.8341/+30.2558+129.8200/+30.2519+129.8000/+30.2494+129.7800/+30.2469+129.7600/+30.2400+129.7468/+30.2316+129.7400/+30.2268+129.7200/+30.2229+129.7000/+30.2229+129.6800/+30.2230+129.6600/+30.2234+129.6400/+30.2246+129.6200/+30.2275+129.6000/+30.2400+129.5827/+30.2578+129.6000/+30.2600+129.6017/+30.2662+129.6200/+30.2719+129.6400/+30.2790+129.6600/+30.2800+129.6619/+30.2906+129.6800/+30.3000+129.6924/+30.3056+129.7000/+30.3108+129.7200/+30.3173+129.7400/+30.3200+129.7475/+30.3280+129.7600/+30.3400+129.7767/+30.3414+129.7800/+30.3472+129.8000/+30.3500+129.8200/+30.3550+129.8400/+30.3583+129.8600/+30.3600+129.8653/+30.3739+129.8800/+30.3800+129.8912/+30.3847+129.9000/+30.3800+129.9052/+30.3771+129.9200/+30.3799+129.9400/+30.3800+129.9404/+30.3933+129.9600/+30.3977+129.9800/+30.3998+130.0000/+30.4000+130.0010/+30.4154+130.0200/+30.4186+130.0400/+30.4197+130.0600/+30.4200+130.0623/+30.4360+130.0800/+30.4393+130.1000/+30.4398+130.1200/+30.4400+130.1220/+30.4578+130.1400/+30.4598+130.1600/+30.4599+130.1800/+30.4600+130.1847/+30.4753+130.2000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4436+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4200+130.1825/+30.4175+130.1800/+30.4200+130.1760/+30.4400+130.1750/+30.4436+130.1800/ 南西 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 +30.4691+130.2000/+30.4729+130.2200/+30.4600+130.2329/+30.4400+130.2399/+30.4200+130.2371/+30.4029+130.2200/+30.4001+130.2000/+30.4000+130.1954/+30.3846+130.1800/+30.3803+130.1600/+30.3800+130.1538/+30.3662+130.1400/+30.3607+130.1200/+30.3600+130.1128/+30.3473+130.1000/+30.3411+130.0800/+30.3400+130.0716/+30.3290+130.0600/+30.3216+130.0400/+30.3200+130.0325/+30.3085+130.0200/+30.3019+130.0000/+30.3000+129.9929/+30.2883+129.9800/+30.2800+129.9713/+30.2676+129.9600/+30.2612+129.9400/+30.2600+129.9369/+30.2505+129.9200/+30.2442+129.9000/+30.2400+129.8842/+30.2343+129.8800/+30.2200+129.8666/+30.2167+129.8600/+30.2101+129.8400/+30.2039+129.8200/+30.2000+129.8096/+30.1925+129.8000/+30.1800+129.7801/+30.1799+129.7800/+30.1736+129.7600/+30.1691+129.7400/+30.1642+129.7200/+30.1600+129.7087/+30.1555+129.7000/+30.1543+129.6800/+30.1522+129.6600/+30.1550+129.6400/+30.1600+129.6334/+30.1656+129.6400/+30.1800+129.6491/+30.2000+129.6526/+30.2056+129.6600/+30.2193+129.6800/+30.2200+129.6811/+30.2296+129.7000/+30.2400+129.7131/+30.2474+129.7200/+30.2600+129.7319/+30.2636+129.7400/+30.2700+129.7600/+30.2800+129.7800/+30.2800+129.7801/+30.2933+129.8000/+30.3000+129.8075/+30.3070+129.8200/+30.3136+129.8400/+30.3200+129.8537/+30.3232+129.8600/+30.3351+129.8800/+30.3400+129.8899/+30.3461+129.9000/+30.3526+129.9200/+30.3550+129.9400/+30.3594+129.9600/+30.3600+129.9624/+30.3728+129.9800/+30.3786+130.0000/+30.3800+130.0058/+30.3925+130.0200/+30.3985+130.0400/+30.4000+130.0512/+30.4083+130.0600/+30.4186+130.0800/+30.4199+130.1000/+30.4200+130.1004/+30.4388+130.1200/+30.4398+130.1400/+30.4400+130.1409/+30.4591+130.1600/+30.4599+130.1800/+30.4600+130.1909/+30.4691+130.2000/ 南西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4427+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/+30.4200+130.1800/+30.4200+130.1799/+30.4400+130.1773/+30.4427+130.1800/ 南西 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 +30.4660+130.2200/+30.4600+130.2260/+30.4400+130.2398/+30.4200+130.2380/+30.4020+130.2200/+30.4001+130.2000/+30.4000+130.1986/+30.3814+130.1800/+30.3801+130.1600/+30.3800+130.1585/+30.3615+130.1400/+30.3602+130.1200/+30.3600+130.1188/+30.3417+130.1000/+30.3400+130.0800/+30.3400+130.0798/+30.3216+130.0600/+30.3200+130.0504/+30.3101+130.0400/+30.3014+130.0200/+30.3000+130.0138/+30.2871+130.0000/+30.2807+129.9800/+30.2800+129.9786/+30.2600+129.9699/+30.2517+129.9600/+30.2448+129.9400/+30.2414+129.9200/+30.2400+129.9164/+30.2217+129.9000/+30.2200+129.8980/+30.2079+129.8800/+30.2025+129.8600/+30.2000+129.8514/+30.1901+129.8400/+30.1800+129.8243/+30.1781+129.8200/+30.1679+129.8000/+30.1621+129.7800/+30.1600+129.7723/+30.1546+129.7600/+30.1458+129.7400/+30.1400+129.7295/+30.1349+129.7200/+30.1267+129.7000/+30.1247+129.6800/+30.1220+129.6600/+30.1200+129.6418/+30.1197+129.6400/+30.1178+129.6200/+30.1000+129.6013/+30.0993+129.6000/+30.0994+129.5800/+30.0996+129.5600/+30.1000+129.5585/+30.1006+129.5600/+30.1020+129.5800/+30.1200+129.5937/+30.1400+129.5947/+30.1462+129.6000/+30.1600+129.6124/+30.1638+129.6200/+30.1732+129.6400/+30.1800+129.6528/+30.1845+129.6600/+30.2000+129.6733/+30.2063+129.6800/+30.2189+129.7000/+30.2200+129.7017/+30.2299+129.7200/+30.2379+129.7400/+30.2400+129.7452/+30.2477+129.7600/+30.2600+129.7755/+30.2623+129.7800/+30.2690+129.8000/+30.2788+129.8200/+30.2800+129.8229/+30.2879+129.8400/+30.2958+129.8600/+30.3000+129.8706/+30.3105+129.8800/+30.3200+129.8915/+30.3256+129.9000/+30.3337+129.9200/+30.3345+129.9400/+30.3388+129.9600/+30.3400+129.9631/+30.3548+129.9800/+30.3594+130.0000/+30.3600+130.0015/+30.3768+130.0200/+30.3796+130.0400/+30.3800+130.0409/+30.3979+130.0600/+30.3999+130.0800/+30.4000+130.0803/+30.4189+130.1000/+30.4200+130.1168/+30.4232+130.1200/+30.4396+130.1400/+30.4400+130.1459/+30.4541+130.1600/+30.4599+130.1800/+30.4600+130.2000/+30.4600+130.2055/+30.4660+130.2200/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4427+130.1800/+30.4585+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2026/+30.4174+130.2000/+30.4193+130.1800/+30.4200+130.1789/+30.4400+130.1773/+30.4427+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時までは火口から西方向に降灰が予想されます。 　４日１２時から５日６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１２時から１５時まで　南西　　　　　　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　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日００時から０３時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日０３時から０６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。