2026-09-01T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-02T02:00:00+09:00 2026-09-02T03:00:00+09:00 2026-09-02T21:00:00+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、２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 2026-09-02T03:00:00+09:00 2026-09-02T06:00:00+09:00 降灰 70 +30.6002+129.7400/+30.6015+129.7600/+30.6000+129.7661/+30.5928+129.7800/+30.5917+129.8000/+30.5888+129.8200/+30.5889+129.8400/+30.5859+129.8600/+30.5800+129.8783/+30.5793+129.8800/+30.5737+129.9000/+30.5706+129.9200/+30.5600+129.9323/+30.5576+129.9400/+30.5545+129.9600/+30.5477+129.9800/+30.5400+129.9943/+30.5389+130.0000/+30.5354+130.0200/+30.5284+130.0400/+30.5200+130.0527/+30.5193+130.0600/+30.5176+130.0800/+30.5128+130.1000/+30.5000+130.1152/+30.4995+130.1200/+30.4989+130.1400/+30.4975+130.1600/+30.4800+130.1796/+30.4800+130.1800/+30.4800+130.2000/+30.4799+130.2200/+30.4600+130.2399/+30.4400+130.2400/+30.4200+130.2200/+30.4200+130.2000/+30.4201+130.1800/+30.4203+130.1600/+30.4210+130.1400/+30.4234+130.1200/+30.4344+130.1000/+30.4400+130.0918/+30.4412+130.0800/+30.4446+130.0600/+30.4508+130.0400/+30.4600+130.0258/+30.4610+130.0200/+30.4645+130.0000/+30.4703+129.9800/+30.4800+129.9658/+30.4826+129.9600/+30.4878+129.9400/+30.4916+129.9200/+30.4926+129.9000/+30.5000+129.8818/+30.5011+129.8800/+30.5116+129.8600/+30.5200+129.8430/+30.5212+129.8400/+30.5285+129.8200/+30.5388+129.8000/+30.5400+129.7966/+30.5474+129.7800/+30.5600+129.7612/+30.5762+129.7600/+30.5800+129.7592/+30.5994+129.7400/+30.6000+129.7394/+30.6002+129.7400/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4674+130.2000/+30.4600+130.2074/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4236+130.2000/+30.4400+130.1827/+30.4600+130.1910/+30.4674+130.2000/ 西 2 鹿児島県屋久島町 4650500 2026-09-02T06:00:00+09:00 2026-09-02T09:00:00+09:00 降灰 70 +30.5227+129.9400/+30.5218+129.9600/+30.5200+129.9654/+30.5169+129.9800/+30.5175+130.0000/+30.5158+130.0200/+30.5112+130.0400/+30.5099+130.0600/+30.5009+130.0800/+30.5000+130.0816/+30.4979+130.1000/+30.4949+130.1200/+30.4928+130.1400/+30.4877+130.1600/+30.4800+130.1692/+30.4798+130.1800/+30.4799+130.2000/+30.4799+130.2200/+30.4600+130.2399/+30.4400+130.2400/+30.4200+130.2200/+30.4200+130.2177/+30.4017+130.2000/+30.4007+130.1800/+30.4007+130.1600/+30.4016+130.1400/+30.4040+130.1200/+30.4050+130.1000/+30.4131+130.0800/+30.4200+130.0600/+30.4341+130.0400/+30.4400+130.0241/+30.4406+130.0200/+30.4436+130.0000/+30.4461+129.9800/+30.4510+129.9600/+30.4559+129.9400/+30.4600+129.9343/+30.4800+129.9213/+30.4823+129.9200/+30.5000+129.9012/+30.5158+129.9200/+30.5200+129.9295/+30.5227+129.9400/ 西 30 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4709+130.2000/+30.4600+130.2109/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4254+130.2000/+30.4400+130.1845/+30.4600+130.1883/+30.4709+130.2000/ 西 2 鹿児島県屋久島町 4650500 2026-09-02T09:00:00+09:00 2026-09-02T12:00:00+09:00 降灰 70 +30.5225+129.7600/+30.5211+129.7800/+30.5200+129.7938/+30.5191+129.8000/+30.5187+129.8200/+30.5181+129.8400/+30.5184+129.8600/+30.5171+129.8800/+30.5161+129.9000/+30.5097+129.9200/+30.5084+129.9400/+30.5024+129.9600/+30.5000+129.9647/+30.4984+129.9800/+30.4975+130.0000/+30.4964+130.0200/+30.4941+130.0400/+30.4908+130.0600/+30.4838+130.0800/+30.4800+130.0881/+30.4798+130.1000/+30.4796+130.1200/+30.4796+130.1400/+30.4797+130.1600/+30.4798+130.1800/+30.4799+130.2000/+30.4797+130.2200/+30.4600+130.2397/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2000/+30.4200+130.1917/+30.4092+130.1800/+30.4048+130.1600/+30.4047+130.1400/+30.4060+130.1200/+30.4087+130.1000/+30.4125+130.0800/+30.4184+130.0600/+30.4200+130.0546/+30.4205+130.0400/+30.4214+130.0200/+30.4235+130.0000/+30.4268+129.9800/+30.4285+129.9600/+30.4367+129.9400/+30.4400+129.9315/+30.4414+129.9200/+30.4400+129.9111/+30.4351+129.9000/+30.4400+129.8807/+30.4402+129.8800/+30.4455+129.8600/+30.4529+129.8400/+30.4600+129.8212/+30.4604+129.8200/+30.4642+129.8000/+30.4682+129.7800/+30.4732+129.7600/+30.4800+129.7404/+30.5000+129.7423/+30.5200+129.7461/+30.5225+129.7600/ 西 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4562+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4238+130.2000/+30.4400+130.1824/+30.4562+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-02T12:00:00+09:00 2026-09-02T15:00:00+09:00 降灰 70 +30.5059+129.6600/+30.5102+129.6800/+30.5113+129.7000/+30.5120+129.7200/+30.5115+129.7400/+30.5111+129.7600/+30.5133+129.7800/+30.5150+129.8000/+30.5157+129.8200/+30.5145+129.8400/+30.5135+129.8600/+30.5116+129.8800/+30.5106+129.9000/+30.5000+129.9184/+30.4997+129.9200/+30.4985+129.9400/+30.4974+129.9600/+30.4962+129.9800/+30.4950+130.0000/+30.4941+130.0200/+30.4917+130.0400/+30.4882+130.0600/+30.4800+130.0800/+30.4797+130.1000/+30.4796+130.1200/+30.4796+130.1400/+30.4797+130.1600/+30.4798+130.1800/+30.4799+130.2000/+30.4796+130.2200/+30.4600+130.2396/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2000/+30.4200+130.1996/+30.4024+130.1800/+30.4014+130.1600/+30.4015+130.1400/+30.4019+130.1200/+30.4025+130.1000/+30.4029+130.0800/+30.4035+130.0600/+30.4037+130.0400/+30.4047+130.0200/+30.4070+130.0000/+30.4087+129.9800/+30.4121+129.9600/+30.4150+129.9400/+30.4200+129.9231/+30.4203+129.9200/+30.4200+129.9081/+30.4190+129.9000/+30.4200+129.8949/+30.4211+129.8800/+30.4228+129.8600/+30.4255+129.8400/+30.4284+129.8200/+30.4272+129.8000/+30.4310+129.7800/+30.4357+129.7600/+30.4400+129.7447/+30.4415+129.7400/+30.4477+129.7200/+30.4539+129.7000/+30.4600+129.6868/+30.4701+129.6800/+30.4800+129.6682/+30.4863+129.6600/+30.5000+129.6404/+30.5059+129.6600/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4663+130.2000/+30.4600+130.2063/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4227+130.2000/+30.4400+130.1812/+30.4600+130.1913/+30.4663+130.2000/ 西 2 鹿児島県屋久島町 4650500 2026-09-02T15:00:00+09:00 2026-09-02T18:00:00+09:00 降灰 70 +30.4601+129.7600/+30.4636+129.7800/+30.4658+129.8000/+30.4648+129.8200/+30.4668+129.8400/+30.4689+129.8600/+30.4694+129.8800/+30.4697+129.9000/+30.4600+129.9194/+30.4599+129.9200/+30.4597+129.9400/+30.4600+129.9557/+30.4604+129.9600/+30.4623+129.9800/+30.4658+130.0000/+30.4671+130.0200/+30.4672+130.0400/+30.4685+130.0600/+30.4707+130.0800/+30.4720+130.1000/+30.4735+130.1200/+30.4758+130.1400/+30.4776+130.1600/+30.4792+130.1800/+30.4797+130.2000/+30.4789+130.2200/+30.4600+130.2389/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2132/+30.4068+130.2000/+30.4006+130.1800/+30.4003+130.1600/+30.4003+130.1400/+30.4003+130.1200/+30.4004+130.1000/+30.4003+130.0800/+30.4000+130.0629/+30.3980+130.0600/+30.3886+130.0400/+30.3848+130.0200/+30.3836+130.0000/+30.3829+129.9800/+30.3823+129.9600/+30.3821+129.9400/+30.3811+129.9200/+30.3800+129.9165/+30.3674+129.9000/+30.3671+129.8800/+30.3672+129.8600/+30.3672+129.8400/+30.3669+129.8200/+30.3654+129.8000/+30.3658+129.7800/+30.3663+129.7600/+30.3677+129.7400/+30.3697+129.7200/+30.3712+129.7000/+30.3737+129.6800/+30.3770+129.6600/+30.3800+129.6467/+30.3817+129.6400/+30.3875+129.6200/+30.3945+129.6000/+30.4000+129.5829/+30.4148+129.6000/+30.4200+129.6056/+30.4312+129.6200/+30.4400+129.6343/+30.4420+129.6400/+30.4482+129.6600/+30.4533+129.6800/+30.4557+129.7000/+30.4569+129.7200/+30.4587+129.7400/+30.4600+129.7584/+30.4601+129.7600/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4470+130.1800/+30.4585+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4215+130.2000/+30.4330+130.1800/+30.4400+130.1696/+30.4470+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-02T18:00:00+09:00 2026-09-02T21:00:00+09:00 降灰 70 +30.4770+130.1800/+30.4794+130.2000/+30.4782+130.2200/+30.4600+130.2382/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2186/+30.4014+130.2000/+30.4002+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4001+130.1200/+30.4000+130.1153/+30.3868+130.1000/+30.3826+130.0800/+30.3816+130.0600/+30.3811+130.0400/+30.3805+130.0200/+30.3800+130.0111/+30.3728+130.0000/+30.3673+129.9800/+30.3646+129.9600/+30.3637+129.9400/+30.3624+129.9200/+30.3600+129.9051/+30.3548+129.9000/+30.3500+129.8800/+30.3471+129.8600/+30.3451+129.8400/+30.3423+129.8200/+30.3400+129.8138/+30.3342+129.8000/+30.3342+129.7800/+30.3342+129.7600/+30.3338+129.7400/+30.3333+129.7200/+30.3301+129.7000/+30.3335+129.6800/+30.3379+129.6600/+30.3400+129.6455/+30.3418+129.6400/+30.3430+129.6200/+30.3446+129.6000/+30.3524+129.5800/+30.3600+129.5643/+30.3735+129.5800/+30.3800+129.5872/+30.3919+129.6000/+30.4000+129.6062/+30.4043+129.6200/+30.4097+129.6400/+30.4169+129.6600/+30.4200+129.6676/+30.4241+129.6800/+30.4252+129.7000/+30.4292+129.7200/+30.4323+129.7400/+30.4349+129.7600/+30.4376+129.7800/+30.4400+129.7925/+30.4455+129.8000/+30.4463+129.8200/+30.4490+129.8400/+30.4511+129.8600/+30.4540+129.8800/+30.4558+129.9000/+30.4425+129.9200/+30.4524+129.9400/+30.4538+129.9600/+30.4554+129.9800/+30.4560+130.0000/+30.4579+130.0200/+30.4589+130.0400/+30.4592+130.0600/+30.4593+130.0800/+30.4597+130.1000/+30.4599+130.1200/+30.4599+130.1400/+30.4600+130.1600/+30.4600+130.1610/+30.4770+130.1800/ 西 60 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/+30.4213+130.2000/+30.4327+130.1800/+30.4400+130.1685/+30.4473+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、２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。 　２日３時から２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 　０２日０３時から０６時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０２日０６時から０９時まで　西　　　　　　　３０ｋｍ　　２ｋｍ　　　　　 　０２日０９時から１２時まで　西　　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　０２日１２時から１５時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０２日１５時から１８時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０２日１８時から２１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。