2026-08-02T20:00:00Z 通常 気象庁本庁 気象庁 2026-08-03T05:00:00+09:00 2026-08-03T06:00:00+09:00 2026-08-04T00:00:00+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、３日０９時から１２時までは火口から南西方向、３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 2026-08-03T06:00:00+09:00 2026-08-03T09:00:00+09:00 降灰 70 +30.4719+130.2000/+30.4769+130.2200/+30.4600+130.2369/+30.4400+130.2400/+30.4200+130.2399/+30.4000+130.2392/+30.3800+130.2352/+30.3600+130.2211/+30.3584+130.2200/+30.3400+130.2160/+30.3200+130.2088/+30.3070+130.2000/+30.3000+130.1964/+30.2813+130.1800/+30.2800+130.1790/+30.2600+130.1741/+30.2428+130.1600/+30.2400+130.1575/+30.2200+130.1483/+30.2097+130.1400/+30.2000+130.1338/+30.1800+130.1257/+30.1697+130.1200/+30.1600+130.1149/+30.1401+130.1000/+30.1400+130.0998/+30.1253+130.0800/+30.1200+130.0713/+30.1084+130.0600/+30.1000+130.0513/+30.0869+130.0400/+30.0829+130.0200/+30.0800+130.0115/+30.0757+130.0000/+30.0800+129.9970/+30.1000+129.9911/+30.1200+129.9875/+30.1400+129.9906/+30.1600+129.9953/+30.1800+129.9972/+30.1856+130.0000/+30.2000+130.0055/+30.2200+130.0125/+30.2295+130.0200/+30.2400+130.0252/+30.2600+130.0349/+30.2699+130.0400/+30.2800+130.0432/+30.3000+130.0595/+30.3005+130.0600/+30.3200+130.0694/+30.3318+130.0800/+30.3400+130.0832/+30.3590+130.1000/+30.3600+130.1005/+30.3800+130.1181/+30.3819+130.1200/+30.4000+130.1294/+30.4106+130.1400/+30.4200+130.1459/+30.4341+130.1600/+30.4400+130.1625/+30.4575+130.1800/+30.4600+130.1881/+30.4719+130.2000/ 南西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4552+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4206+130.2200/+30.4220+130.2000/+30.4400+130.1848/+30.4552+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-03T09:00:00+09:00 2026-08-03T12:00:00+09:00 降灰 70 +30.4752+130.2000/+30.4774+130.2200/+30.4600+130.2373/+30.4400+130.2399/+30.4200+130.2389/+30.4010+130.2200/+30.4000+130.2000/+30.4000+130.1997/+30.3806+130.1800/+30.3800+130.1769/+30.3632+130.1600/+30.3600+130.1502/+30.3498+130.1400/+30.3400+130.1222/+30.3378+130.1200/+30.3209+130.1000/+30.3200+130.0980/+30.3046+130.0800/+30.3000+130.0734/+30.2866+130.0600/+30.2800+130.0463/+30.2744+130.0400/+30.2600+130.0241/+30.2561+130.0200/+30.2422+130.0000/+30.2400+129.9958/+30.2267+129.9800/+30.2200+129.9656/+30.2166+129.9600/+30.2060+129.9400/+30.2000+129.9299/+30.1924+129.9200/+30.1864+129.9000/+30.1800+129.8831/+30.1788+129.8800/+30.1794+129.8600/+30.1800+129.8473/+30.1806+129.8400/+30.2000+129.8235/+30.2200+129.8364/+30.2258+129.8400/+30.2400+129.8448/+30.2566+129.8600/+30.2600+129.8626/+30.2784+129.8800/+30.2800+129.8814/+30.2935+129.9000/+30.3000+129.9089/+30.3091+129.9200/+30.3200+129.9300/+30.3262+129.9400/+30.3357+129.9600/+30.3400+129.9685/+30.3487+129.9800/+30.3594+130.0000/+30.3600+130.0011/+30.3741+130.0200/+30.3800+130.0329/+30.3861+130.0400/+30.3974+130.0600/+30.4000+130.0681/+30.4110+130.0800/+30.4187+130.1000/+30.4200+130.1052/+30.4345+130.1200/+30.4395+130.1400/+30.4400+130.1418/+30.4582+130.1600/+30.4599+130.1800/+30.4600+130.1848/+30.4752+130.2000/ 南西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4565+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4215+130.2000/+30.4400+130.1819/+30.4565+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-03T12:00:00+09:00 2026-08-03T15:00:00+09:00 降灰 70 +30.4789+130.2000/+30.4786+130.2200/+30.4600+130.2386/+30.4400+130.2399/+30.4200+130.2200/+30.4003+130.2000/+30.4001+130.1800/+30.4000+130.1668/+30.3932+130.1600/+30.3814+130.1400/+30.3804+130.1200/+30.3800+130.1089/+30.3723+130.1000/+30.3641+130.0800/+30.3618+130.0600/+30.3601+130.0400/+30.3600+130.0392/+30.3493+130.0200/+30.3456+130.0000/+30.3434+129.9800/+30.3400+129.9624/+30.3387+129.9600/+30.3316+129.9400/+30.3254+129.9200/+30.3243+129.9000/+30.3237+129.8800/+30.3238+129.8600/+30.3217+129.8400/+30.3225+129.8200/+30.3228+129.8000/+30.3227+129.7800/+30.3223+129.7600/+30.3226+129.7400/+30.3233+129.7200/+30.3400+129.7101/+30.3600+129.7078/+30.3713+129.7200/+30.3793+129.7400/+30.3800+129.7419/+30.3861+129.7600/+30.3981+129.7800/+30.4000+129.7832/+30.4066+129.8000/+30.4092+129.8200/+30.4119+129.8400/+30.4135+129.8600/+30.4158+129.8800/+30.4178+129.9000/+30.4178+129.9200/+30.4180+129.9400/+30.4188+129.9600/+30.4199+129.9800/+30.4200+129.9810/+30.4286+130.0000/+30.4332+130.0200/+30.4364+130.0400/+30.4385+130.0600/+30.4393+130.0800/+30.4398+130.1000/+30.4400+130.1036/+30.4548+130.1200/+30.4594+130.1400/+30.4599+130.1600/+30.4600+130.1800/+30.4600+130.1808/+30.4789+130.2000/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4579+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1806/+30.4579+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-03T15:00:00+09:00 2026-08-03T18:00:00+09:00 降灰 70 +30.4780+130.2000/+30.4780+130.2200/+30.4600+130.2380/+30.4400+130.2399/+30.4200+130.2280/+30.4120+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1746/+30.3854+130.1600/+30.3805+130.1400/+30.3801+130.1200/+30.3800+130.1194/+30.3621+130.1000/+30.3605+130.0800/+30.3600+130.0746/+30.3464+130.0600/+30.3416+130.0400/+30.3400+130.0227/+30.3377+130.0200/+30.3232+130.0000/+30.3202+129.9800/+30.3200+129.9785/+30.3065+129.9600/+30.3000+129.9457/+30.2929+129.9400/+30.2818+129.9200/+30.2800+129.9151/+30.2728+129.9000/+30.2673+129.8800/+30.2626+129.8600/+30.2600+129.8518/+30.2543+129.8400/+30.2538+129.8200/+30.2529+129.8000/+30.2575+129.7800/+30.2600+129.7735/+30.2691+129.7600/+30.2800+129.7476/+30.3000+129.7575/+30.3048+129.7600/+30.3200+129.7638/+30.3326+129.7800/+30.3400+129.7945/+30.3422+129.8000/+30.3496+129.8200/+30.3545+129.8400/+30.3572+129.8600/+30.3600+129.8689/+30.3667+129.8800/+30.3761+129.9000/+30.3739+129.9200/+30.3780+129.9400/+30.3800+129.9517/+30.3844+129.9600/+30.3939+129.9800/+30.3981+130.0000/+30.4000+130.0167/+30.4028+130.0200/+30.4167+130.0400/+30.4192+130.0600/+30.4200+130.0693/+30.4300+130.0800/+30.4388+130.1000/+30.4397+130.1200/+30.4400+130.1225/+30.4574+130.1400/+30.4598+130.1600/+30.4600+130.1800/+30.4600+130.1820/+30.4780+130.2000/ 南西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4425+130.1800/+30.4581+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4219+130.2000/+30.4359+130.1800/+30.4400+130.1766/+30.4425+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-03T18:00:00+09:00 2026-08-03T21:00:00+09:00 降灰 70 +30.4774+130.2000/+30.4773+130.2200/+30.4600+130.2373/+30.4400+130.2399/+30.4200+130.2297/+30.4103+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1728/+30.3872+130.1600/+30.3807+130.1400/+30.3803+130.1200/+30.3800+130.1133/+30.3673+130.1000/+30.3615+130.0800/+30.3605+130.0600/+30.3600+130.0553/+30.3463+130.0400/+30.3416+130.0200/+30.3400+130.0062/+30.3346+130.0000/+30.3236+129.9800/+30.3202+129.9600/+30.3200+129.9590/+30.3061+129.9400/+30.3002+129.9200/+30.3000+129.9191/+30.2860+129.9000/+30.2802+129.8800/+30.2800+129.8790/+30.2740+129.8600/+30.2628+129.8400/+30.2600+129.8297/+30.2578+129.8200/+30.2540+129.8000/+30.2515+129.7800/+30.2487+129.7600/+30.2425+129.7400/+30.2400+129.7307/+30.2374+129.7200/+30.2333+129.7000/+30.2333+129.6800/+30.2334+129.6600/+30.2342+129.6400/+30.2362+129.6200/+30.2391+129.6000/+30.2400+129.5971/+30.2600+129.5992/+30.2603+129.6000/+30.2681+129.6200/+30.2784+129.6400/+30.2800+129.6422/+30.2976+129.6600/+30.3000+129.6614/+30.3107+129.6800/+30.3184+129.7000/+30.3172+129.7200/+30.3200+129.7260/+30.3306+129.7400/+30.3389+129.7600/+30.3400+129.7630/+30.3449+129.7800/+30.3488+129.8000/+30.3527+129.8200/+30.3574+129.8400/+30.3600+129.8526/+30.3646+129.8600/+30.3778+129.8800/+30.3800+129.8853/+30.3869+129.9000/+30.3800+129.9122/+30.3789+129.9200/+30.3800+129.9247/+30.3901+129.9400/+30.3962+129.9600/+30.3986+129.9800/+30.4000+129.9897/+30.4082+130.0000/+30.4168+130.0200/+30.4191+130.0400/+30.4200+130.0582/+30.4215+130.0600/+30.4374+130.0800/+30.4394+130.1000/+30.4398+130.1200/+30.4400+130.1212/+30.4585+130.1400/+30.4598+130.1600/+30.4600+130.1800/+30.4600+130.1826/+30.4774+130.2000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4415+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4374+130.1800/+30.4400+130.1778/+30.4415+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-03T21:00:00+09:00 2026-08-04T00:00:00+09:00 降灰 70 +30.4775+130.2000/+30.4774+130.2200/+30.4600+130.2374/+30.4400+130.2399/+30.4200+130.2243/+30.4157+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1605/+30.3995+130.1600/+30.3811+130.1400/+30.3804+130.1200/+30.3800+130.1075/+30.3727+130.1000/+30.3624+130.0800/+30.3607+130.0600/+30.3600+130.0492/+30.3523+130.0400/+30.3432+130.0200/+30.3409+130.0000/+30.3400+129.9930/+30.3306+129.9800/+30.3236+129.9600/+30.3211+129.9400/+30.3200+129.9375/+30.3053+129.9200/+30.3030+129.9000/+30.3004+129.8800/+30.3000+129.8778/+30.2892+129.8600/+30.2868+129.8400/+30.2829+129.8200/+30.2800+129.8026/+30.2787+129.8000/+30.2702+129.7800/+30.2645+129.7600/+30.2654+129.7400/+30.2671+129.7200/+30.2684+129.7000/+30.2677+129.6800/+30.2663+129.6600/+30.2677+129.6400/+30.2800+129.6203/+30.2803+129.6200/+30.3000+129.6104/+30.3042+129.6200/+30.3113+129.6400/+30.3168+129.6600/+30.3200+129.6732/+30.3215+129.6800/+30.3255+129.7000/+30.3362+129.7200/+30.3400+129.7297/+30.3432+129.7400/+30.3478+129.7600/+30.3513+129.7800/+30.3544+129.8000/+30.3577+129.8200/+30.3600+129.8281/+30.3682+129.8400/+30.3768+129.8600/+30.3800+129.8674/+30.3861+129.8800/+30.3921+129.9000/+30.3831+129.9200/+30.3938+129.9400/+30.3976+129.9600/+30.3994+129.9800/+30.4000+129.9840/+30.4117+130.0000/+30.4177+130.0200/+30.4192+130.0400/+30.4200+130.0490/+30.4300+130.0600/+30.4383+130.0800/+30.4395+130.1000/+30.4400+130.1200/+30.4400+130.1202/+30.4590+130.1400/+30.4598+130.1600/+30.4600+130.1800/+30.4600+130.1825/+30.4775+130.2000/ 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/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4359+130.1800/+30.4400+130.1761/+30.4427+130.1800/ 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、３日０９時から１２時までは火口から南西方向、３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。 　３日６時から３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 　０３日０６時から０９時まで　南西　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０３日０９時から１２時まで　南西　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０３日１２時から１５時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０３日１５時から１８時まで　南西　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　０３日１８時から２１時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０３日２１時から２４時まで　西　　　　　　　６０ｋｍ　　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。