2026-09-18T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-19T02:00:00+09:00 2026-09-19T03:00:00+09:00 2026-09-19T21:00:00+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、１９日０９時から１２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 2026-09-19T03:00:00+09:00 2026-09-19T06:00:00+09:00 降灰 70 +30.4894+130.0200/+30.4905+130.0400/+30.4831+130.0600/+30.4877+130.0800/+30.4868+130.1000/+30.4800+130.1136/+30.4792+130.1200/+30.4784+130.1400/+30.4780+130.1600/+30.4786+130.1800/+30.4798+130.2000/+30.4798+130.2200/+30.4600+130.2398/+30.4400+130.2400/+30.4200+130.2241/+30.4159+130.2200/+30.4005+130.2000/+30.4002+130.1800/+30.4000+130.1680/+30.3933+130.1600/+30.3834+130.1400/+30.3808+130.1200/+30.3800+130.1120/+30.3733+130.1000/+30.3714+130.0800/+30.3762+130.0600/+30.3800+130.0524/+30.3852+130.0400/+30.4000+130.0209/+30.4008+130.0200/+30.4200+130.0016/+30.4400+130.0027/+30.4600+130.0107/+30.4800+130.0076/+30.4894+130.0200/ 西 20 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4510+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4291+130.2000/+30.4400+130.1882/+30.4510+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-19T06:00:00+09:00 2026-09-19T09:00:00+09:00 降灰 70 +30.5036+129.9000/+30.5055+129.9200/+30.5030+129.9400/+30.5000+129.9463/+30.4935+129.9600/+30.4873+129.9800/+30.4842+130.0000/+30.4800+130.0088/+30.4788+130.0200/+30.4767+130.0400/+30.4746+130.0600/+30.4760+130.0800/+30.4753+130.1000/+30.4763+130.1200/+30.4772+130.1400/+30.4785+130.1600/+30.4795+130.1800/+30.4799+130.2000/+30.4797+130.2200/+30.4600+130.2397/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2173/+30.4028+130.2000/+30.4006+130.1800/+30.4005+130.1600/+30.4005+130.1400/+30.4001+130.1200/+30.4000+130.1142/+30.3929+130.1000/+30.3897+130.0800/+30.3851+130.0600/+30.3832+130.0400/+30.3818+130.0200/+30.3800+130.0061/+30.3774+130.0000/+30.3711+129.9800/+30.3730+129.9600/+30.3688+129.9400/+30.3682+129.9200/+30.3635+129.9000/+30.3621+129.8800/+30.3634+129.8600/+30.3720+129.8400/+30.3800+129.8261/+30.3936+129.8200/+30.4000+129.8169/+30.4080+129.8200/+30.4200+129.8224/+30.4400+129.8261/+30.4600+129.8341/+30.4677+129.8400/+30.4800+129.8504/+30.4915+129.8600/+30.4998+129.8800/+30.5000+129.8807/+30.5036+129.9000/ 西 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4549+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4251+130.2000/+30.4400+130.1835/+30.4549+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-19T09:00:00+09:00 2026-09-19T12:00:00+09:00 降灰 70 +30.4818+130.1000/+30.4800+130.1056/+30.4777+130.1200/+30.4767+130.1400/+30.4763+130.1600/+30.4786+130.1800/+30.4797+130.2000/+30.4794+130.2200/+30.4600+130.2394/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2193/+30.4008+130.2000/+30.4002+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4000+130.1287/+30.3924+130.1200/+30.3847+130.1000/+30.3832+130.0800/+30.3824+130.0600/+30.3821+130.0400/+30.3819+130.0200/+30.3813+130.0000/+30.3804+129.9800/+30.3800+129.9698/+30.3781+129.9600/+30.3798+129.9400/+30.3772+129.9200/+30.3724+129.9000/+30.3742+129.8800/+30.3751+129.8600/+30.3796+129.8400/+30.3800+129.8381/+30.3850+129.8200/+30.3874+129.8000/+30.3924+129.7800/+30.3987+129.7600/+30.4000+129.7576/+30.4104+129.7400/+30.4200+129.7248/+30.4232+129.7200/+30.4307+129.7000/+30.4400+129.6888/+30.4559+129.7000/+30.4600+129.7113/+30.4622+129.7200/+30.4665+129.7400/+30.4686+129.7600/+30.4682+129.7800/+30.4679+129.8000/+30.4681+129.8200/+30.4680+129.8400/+30.4675+129.8600/+30.4690+129.8800/+30.4707+129.9000/+30.4652+129.9200/+30.4670+129.9400/+30.4666+129.9600/+30.4655+129.9800/+30.4629+130.0000/+30.4616+130.0200/+30.4648+130.0400/+30.4666+130.0600/+30.4669+130.0800/+30.4800+130.0966/+30.4818+130.1000/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4580+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1802/+30.4580+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-19T12:00:00+09:00 2026-09-19T15:00:00+09:00 降灰 70 +30.4837+130.0400/+30.4824+130.0600/+30.4800+130.0738/+30.4782+130.0800/+30.4763+130.1000/+30.4737+130.1200/+30.4698+130.1400/+30.4680+130.1600/+30.4680+130.1800/+30.4783+130.2000/+30.4777+130.2200/+30.4600+130.2377/+30.4400+130.2399/+30.4200+130.2291/+30.4109+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1779/+30.3822+130.1600/+30.3804+130.1400/+30.3800+130.1294/+30.3707+130.1200/+30.3615+130.1000/+30.3602+130.0800/+30.3600+130.0788/+30.3441+130.0600/+30.3412+130.0400/+30.3400+130.0336/+30.3288+130.0200/+30.3234+130.0000/+30.3209+129.9800/+30.3200+129.9773/+30.3065+129.9600/+30.3015+129.9400/+30.3000+129.9258/+30.2974+129.9200/+30.2890+129.9000/+30.2846+129.8800/+30.2818+129.8600/+30.2827+129.8400/+30.2823+129.8200/+30.2811+129.8000/+30.2816+129.7800/+30.2825+129.7600/+30.2846+129.7400/+30.2877+129.7200/+30.2936+129.7000/+30.3000+129.6803/+30.3023+129.6800/+30.3200+129.6780/+30.3400+129.6759/+30.3430+129.6800/+30.3564+129.7000/+30.3600+129.7022/+30.3701+129.7200/+30.3754+129.7400/+30.3793+129.7600/+30.3800+129.7647/+30.3821+129.7800/+30.3848+129.8000/+30.3876+129.8200/+30.3916+129.8400/+30.3959+129.8600/+30.4000+129.8787/+30.4003+129.8800/+30.4062+129.9000/+30.4035+129.9200/+30.4087+129.9400/+30.4143+129.9600/+30.4170+129.9800/+30.4196+130.0000/+30.4200+130.0024/+30.4283+130.0200/+30.4356+130.0400/+30.4386+130.0600/+30.4398+130.0800/+30.4400+130.0819/+30.4433+130.0800/+30.4505+130.0600/+30.4600+130.0481/+30.4723+130.0400/+30.4800+130.0310/+30.4837+130.0400/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4433+130.1800/+30.4581+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4219+130.2000/+30.4338+130.1800/+30.4400+130.1750/+30.4433+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-19T15:00:00+09:00 2026-09-19T18:00:00+09:00 降灰 70 +30.4652+130.2000/+30.4692+130.2200/+30.4600+130.2292/+30.4400+130.2398/+30.4200+130.2366/+30.4034+130.2200/+30.4001+130.2000/+30.4000+130.1971/+30.3828+130.1800/+30.3802+130.1600/+30.3800+130.1565/+30.3636+130.1400/+30.3604+130.1200/+30.3600+130.1161/+30.3441+130.1000/+30.3406+130.0800/+30.3400+130.0766/+30.3243+130.0600/+30.3206+130.0400/+30.3200+130.0368/+30.3053+130.0200/+30.3008+130.0000/+30.3000+129.9972/+30.2852+129.9800/+30.2800+129.9740/+30.2648+129.9600/+30.2600+129.9406/+30.2596+129.9400/+30.2491+129.9200/+30.2433+129.9000/+30.2400+129.8874/+30.2290+129.8800/+30.2200+129.8688/+30.2167+129.8600/+30.2116+129.8400/+30.2065+129.8200/+30.2006+129.8000/+30.2000+129.7981/+30.1874+129.7800/+30.1813+129.7600/+30.1800+129.7534/+30.1774+129.7400/+30.1746+129.7200/+30.1712+129.7000/+30.1703+129.6800/+30.1687+129.6600/+30.1680+129.6400/+30.1696+129.6200/+30.1724+129.6000/+30.1800+129.5917/+30.1947+129.5800/+30.2000+129.5767/+30.2016+129.5800/+30.2108+129.6000/+30.2172+129.6200/+30.2200+129.6278/+30.2247+129.6400/+30.2375+129.6600/+30.2400+129.6627/+30.2534+129.6800/+30.2600+129.6892/+30.2650+129.7000/+30.2754+129.7200/+30.2800+129.7313/+30.2836+129.7400/+30.2918+129.7600/+30.3000+129.7739/+30.3028+129.7800/+30.3096+129.8000/+30.3167+129.8200/+30.3200+129.8298/+30.3248+129.8400/+30.3333+129.8600/+30.3400+129.8737/+30.3432+129.8800/+30.3513+129.9000/+30.3551+129.9200/+30.3577+129.9400/+30.3600+129.9490/+30.3671+129.9600/+30.3764+129.9800/+30.3800+129.9987/+30.3810+130.0000/+30.3952+130.0200/+30.3991+130.0400/+30.4000+130.0446/+30.4129+130.0600/+30.4188+130.0800/+30.4200+130.0916/+30.4280+130.1000/+30.4389+130.1200/+30.4399+130.1400/+30.4400+130.1405/+30.4587+130.1600/+30.4599+130.1800/+30.4600+130.1948/+30.4652+130.2000/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4434+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2053/+30.4147+130.2000/+30.4154+130.1800/+30.4200+130.1734/+30.4400+130.1766/+30.4434+130.1800/ 南西 4 鹿児島県屋久島町 4650500 2026-09-19T18:00:00+09:00 2026-09-19T21:00:00+09:00 降灰 70 +30.4598+130.1800/+30.4600+130.2000/+30.4599+130.2200/+30.4400+130.2398/+30.4200+130.2387/+30.4013+130.2200/+30.4001+130.2000/+30.4000+130.1998/+30.3803+130.1800/+30.3800+130.1780/+30.3620+130.1600/+30.3600+130.1457/+30.3543+130.1400/+30.3405+130.1200/+30.3400+130.1184/+30.3220+130.1000/+30.3200+130.0939/+30.3062+130.0800/+30.3000+130.0681/+30.2920+130.0600/+30.2806+130.0400/+30.2800+130.0387/+30.2620+130.0200/+30.2600+130.0169/+30.2400+130.0024/+30.2362+130.0000/+30.2200+129.9819/+30.2187+129.9800/+30.2021+129.9600/+30.2000+129.9564/+30.1879+129.9400/+30.1800+129.9312/+30.1697+129.9200/+30.1601+129.9000/+30.1600+129.8997/+30.1424+129.8800/+30.1400+129.8771/+30.1284+129.8600/+30.1200+129.8489/+30.1117+129.8400/+30.1003+129.8200/+30.1000+129.8195/+30.0838+129.8000/+30.0800+129.7925/+30.0738+129.7800/+30.0645+129.7600/+30.0600+129.7476/+30.0559+129.7400/+30.0436+129.7200/+30.0400+129.7158/+30.0294+129.7000/+30.0270+129.6800/+30.0213+129.6600/+30.0270+129.6400/+30.0400+129.6359/+30.0484+129.6400/+30.0600+129.6462/+30.0721+129.6600/+30.0800+129.6664/+30.1000+129.6754/+30.1049+129.6800/+30.1200+129.6989/+30.1207+129.7000/+30.1400+129.7198/+30.1402+129.7200/+30.1600+129.7367/+30.1627+129.7400/+30.1779+129.7600/+30.1800+129.7626/+30.1902+129.7800/+30.2000+129.7971/+30.2024+129.8000/+30.2200+129.8131/+30.2251+129.8200/+30.2339+129.8400/+30.2400+129.8457/+30.2530+129.8600/+30.2600+129.8701/+30.2689+129.8800/+30.2800+129.8962/+30.2829+129.9000/+30.2933+129.9200/+30.3000+129.9301/+30.3085+129.9400/+30.3142+129.9600/+30.3200+129.9740/+30.3257+129.9800/+30.3387+130.0000/+30.3400+130.0025/+30.3561+130.0200/+30.3600+130.0317/+30.3681+130.0400/+30.3790+130.0600/+30.3800+130.0621/+30.3974+130.0800/+30.4000+130.0946/+30.4054+130.1000/+30.4194+130.1200/+30.4200+130.1218/+30.4381+130.1400/+30.4399+130.1600/+30.4400+130.1601/+30.4598+130.1800/ 南西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4582+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4200+130.2111/+30.4089+130.2000/+30.4183+130.1800/+30.4200+130.1783/+30.4255+130.1800/+30.4400+130.1803/+30.4582+130.2000/ 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、１９日０９時から１２時までは火口から西方向に降灰が予想されます。 　１９日３時から１９日２１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 　１９日０３時から０６時まで　西　　　　　　　２０ｋｍ　　２ｋｍ　　　　　 　１９日０６時から０９時まで　西　　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　１９日０９時から１２時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　１９日１２時から１５時まで　西　　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　１９日１５時から１８時まで　南西　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　１９日１８時から２１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。