2026-09-04T14:00:00Z 通常 気象庁本庁 気象庁 2026-09-04T23:00:00+09:00 2026-09-05T00:00:00+09:00 2026-09-05T18:00:00+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、５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 2026-09-05T00:00:00+09:00 2026-09-05T03:00:00+09:00 降灰 70 +30.7008+129.6000/+30.7014+129.6200/+30.7018+129.6400/+30.7000+129.6584/+30.6973+129.6400/+30.6985+129.6200/+30.6994+129.6000/+30.7000+129.5982/+30.7008+129.6000/ +30.6819+129.7400/+30.6820+129.7600/+30.6821+129.7800/+30.6800+129.7932/+30.6790+129.8000/+30.6781+129.8200/+30.6770+129.8400/+30.6681+129.8600/+30.6602+129.8800/+30.6621+129.9000/+30.6600+129.9056/+30.6522+129.9200/+30.6493+129.9400/+30.6447+129.9600/+30.6400+129.9702/+30.6324+129.9800/+30.6264+130.0000/+30.6200+130.0057/+30.6102+130.0200/+30.6000+130.0337/+30.5964+130.0400/+30.5837+130.0600/+30.5800+130.0642/+30.5705+130.0800/+30.5600+130.0916/+30.5556+130.1000/+30.5400+130.1174/+30.5381+130.1200/+30.5247+130.1400/+30.5200+130.1447/+30.5135+130.1600/+30.5000+130.1741/+30.4976+130.1800/+30.4800+130.1987/+30.4800+130.2000/+30.4795+130.2200/+30.4600+130.2395/+30.4400+130.2398/+30.4201+130.2200/+30.4200+130.2181/+30.4020+130.2000/+30.4004+130.1800/+30.4001+130.1600/+30.4000+130.1575/+30.3835+130.1400/+30.3813+130.1200/+30.3805+130.1000/+30.3800+130.0935/+30.3693+130.0800/+30.3637+130.0600/+30.3618+130.0400/+30.3600+130.0287/+30.3534+130.0200/+30.3475+130.0000/+30.3452+129.9800/+30.3415+129.9600/+30.3400+129.9504/+30.3362+129.9400/+30.3297+129.9200/+30.3282+129.9000/+30.3270+129.8800/+30.3264+129.8600/+30.3269+129.8400/+30.3285+129.8200/+30.3301+129.8000/+30.3314+129.7800/+30.3335+129.7600/+30.3380+129.7400/+30.3400+129.7327/+30.3443+129.7200/+30.3600+129.7071/+30.3761+129.7200/+30.3800+129.7267/+30.3878+129.7400/+30.3996+129.7600/+30.4000+129.7603/+30.4164+129.7800/+30.4200+129.7848/+30.4321+129.8000/+30.4400+129.8144/+30.4600+129.8177/+30.4800+129.8174/+30.4900+129.8200/+30.5000+129.8227/+30.5094+129.8400/+30.5152+129.8600/+30.5200+129.8756/+30.5210+129.8800/+30.5274+129.9000/+30.5200+129.9068/+30.5163+129.9200/+30.5150+129.9400/+30.5177+129.9600/+30.5174+129.9800/+30.5200+129.9874/+30.5228+129.9800/+30.5236+129.9600/+30.5300+129.9400/+30.5387+129.9200/+30.5400+129.9185/+30.5469+129.9000/+30.5571+129.8800/+30.5600+129.8754/+30.5689+129.8600/+30.5773+129.8400/+30.5800+129.8305/+30.5832+129.8200/+30.6000+129.8006/+30.6006+129.8000/+30.6095+129.7800/+30.6161+129.7600/+30.6200+129.7492/+30.6257+129.7400/+30.6368+129.7200/+30.6400+129.7137/+30.6591+129.7000/+30.6600+129.6990/+30.6617+129.7000/+30.6779+129.7200/+30.6800+129.7283/+30.6819+129.7400/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4613+130.1800/+30.4764+130.2000/+30.4600+130.2164/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4258+130.1800/+30.4400+130.1628/+30.4600+130.1782/+30.4613+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-05T03:00:00+09:00 2026-09-05T06:00:00+09:00 降灰 70 +30.7797+129.5000/+30.7780+129.5200/+30.7774+129.5400/+30.7752+129.5600/+30.7723+129.5800/+30.7704+129.6000/+30.7662+129.6200/+30.7617+129.6400/+30.7600+129.6455/+30.7552+129.6600/+30.7478+129.6800/+30.7411+129.7000/+30.7400+129.7031/+30.7358+129.7200/+30.7306+129.7400/+30.7247+129.7600/+30.7200+129.7720/+30.7161+129.7800/+30.7071+129.8000/+30.7000+129.8130/+30.6972+129.8200/+30.6850+129.8400/+30.6800+129.8465/+30.6755+129.8600/+30.6692+129.8800/+30.6600+129.8909/+30.6540+129.9000/+30.6459+129.9200/+30.6400+129.9314/+30.6360+129.9400/+30.6280+129.9600/+30.6200+129.9743/+30.6165+129.9800/+30.6000+129.9907/+30.5956+130.0000/+30.5800+130.0199/+30.5800+130.0200/+30.5746+130.0400/+30.5600+130.0579/+30.5592+130.0600/+30.5531+130.0800/+30.5400+130.0939/+30.5376+130.1000/+30.5282+130.1200/+30.5200+130.1284/+30.5170+130.1400/+30.5000+130.1593/+30.4999+130.1600/+30.4977+130.1800/+30.4800+130.1983/+30.4800+130.2000/+30.4796+130.2200/+30.4600+130.2396/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2000/+30.4200+130.1800/+30.4200+130.1600/+30.4200+130.1554/+30.4153+130.1400/+30.4184+130.1200/+30.4200+130.1134/+30.4201+130.1000/+30.4204+130.0800/+30.4209+130.0600/+30.4215+130.0400/+30.4227+130.0200/+30.4243+130.0000/+30.4253+129.9800/+30.4263+129.9600/+30.4299+129.9400/+30.4350+129.9200/+30.4330+129.9000/+30.4371+129.8800/+30.4400+129.8697/+30.4428+129.8600/+30.4485+129.8400/+30.4543+129.8200/+30.4590+129.8000/+30.4600+129.7972/+30.4674+129.7800/+30.4800+129.7621/+30.4816+129.7600/+30.4890+129.7400/+30.4968+129.7200/+30.5000+129.7132/+30.5142+129.7000/+30.5200+129.6936/+30.5315+129.6800/+30.5400+129.6682/+30.5516+129.6600/+30.5600+129.6523/+30.5800+129.6538/+30.5993+129.6600/+30.6000+129.6603/+30.6001+129.6600/+30.6067+129.6400/+30.6068+129.6200/+30.6071+129.6000/+30.6200+129.5985/+30.6400+129.5953/+30.6557+129.5800/+30.6600+129.5768/+30.6800+129.5643/+30.6953+129.5600/+30.7000+129.5583/+30.7122+129.5400/+30.7184+129.5200/+30.7200+129.5158/+30.7277+129.5000/+30.7400+129.4907/+30.7600+129.4871/+30.7797+129.5000/ 北西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4615+130.1800/+30.4764+130.2000/+30.4600+130.2164/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4220+130.2000/+30.4379+130.1800/+30.4400+130.1767/+30.4600+130.1781/+30.4615+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-05T06:00:00+09:00 2026-09-05T09:00:00+09:00 降灰 70 +30.7611+129.6800/+30.7623+129.7000/+30.7600+129.7047/+30.7489+129.7200/+30.7400+129.7364/+30.7386+129.7400/+30.7316+129.7600/+30.7229+129.7800/+30.7200+129.7864/+30.7139+129.8000/+30.7012+129.8200/+30.7000+129.8229/+30.6922+129.8400/+30.6800+129.8568/+30.6788+129.8600/+30.6728+129.8800/+30.6600+129.8963/+30.6579+129.9000/+30.6507+129.9200/+30.6400+129.9398/+30.6399+129.9400/+30.6341+129.9600/+30.6256+129.9800/+30.6200+129.9853/+30.6000+129.9980/+30.5992+130.0000/+30.5929+130.0200/+30.5800+130.0343/+30.5786+130.0400/+30.5712+130.0600/+30.5600+130.0716/+30.5584+130.0800/+30.5414+130.1000/+30.5400+130.1014/+30.5383+130.1200/+30.5200+130.1389/+30.5198+130.1400/+30.5178+130.1600/+30.5000+130.1778/+30.4999+130.1800/+30.4974+130.2000/+30.4800+130.2174/+30.4798+130.2200/+30.4600+130.2398/+30.4400+130.2399/+30.4201+130.2200/+30.4201+130.2000/+30.4206+130.1800/+30.4321+130.1600/+30.4400+130.1517/+30.4414+130.1400/+30.4490+130.1200/+30.4600+130.1032/+30.4605+130.1000/+30.4660+130.0800/+30.4768+130.0600/+30.4800+130.0553/+30.4847+130.0400/+30.4899+130.0200/+30.5000+130.0051/+30.5029+130.0000/+30.5092+129.9800/+30.5200+129.9635/+30.5219+129.9600/+30.5283+129.9400/+30.5339+129.9200/+30.5400+129.9009/+30.5403+129.9000/+30.5484+129.8800/+30.5600+129.8625/+30.5615+129.8600/+30.5700+129.8400/+30.5780+129.8200/+30.5800+129.8166/+30.5938+129.8000/+30.6000+129.7850/+30.6021+129.7800/+30.6140+129.7600/+30.6200+129.7490/+30.6246+129.7400/+30.6346+129.7200/+30.6400+129.7100/+30.6483+129.7000/+30.6585+129.6800/+30.6600+129.6775/+30.6800+129.6709/+30.7000+129.6676/+30.7180+129.6600/+30.7200+129.6588/+30.7400+129.6458/+30.7586+129.6600/+30.7600+129.6655/+30.7611+129.6800/ 北西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4605+130.1800/+30.4770+130.2000/+30.4600+130.2170/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4218+130.2000/+30.4400+130.1816/+30.4597+130.1800/+30.4600+130.1796/+30.4605+130.1800/ 北西 4 鹿児島県屋久島町 4650500 2026-09-05T09:00:00+09:00 2026-09-05T12:00:00+09:00 降灰 70 +30.6845+129.7400/+30.6851+129.7600/+30.6800+129.7789/+30.6798+129.7800/+30.6759+129.8000/+30.6710+129.8200/+30.6656+129.8400/+30.6600+129.8550/+30.6573+129.8600/+30.6409+129.8800/+30.6400+129.8809/+30.6299+129.9000/+30.6200+129.9170/+30.6187+129.9200/+30.6098+129.9400/+30.6000+129.9522/+30.5974+129.9600/+30.5855+129.9800/+30.5800+129.9867/+30.5750+130.0000/+30.5660+130.0200/+30.5600+130.0268/+30.5550+130.0400/+30.5485+130.0600/+30.5400+130.0697/+30.5367+130.0800/+30.5295+130.1000/+30.5200+130.1106/+30.5174+130.1200/+30.5097+130.1400/+30.5000+130.1504/+30.4983+130.1600/+30.4914+130.1800/+30.4800+130.1916/+30.4799+130.2000/+30.4797+130.2200/+30.4600+130.2397/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2093/+30.4108+130.2000/+30.4021+130.1800/+30.4014+130.1600/+30.4015+130.1400/+30.4021+130.1200/+30.4027+130.1000/+30.4030+130.0800/+30.4041+130.0600/+30.4054+130.0400/+30.4077+130.0200/+30.4082+130.0000/+30.4100+129.9800/+30.4151+129.9600/+30.4200+129.9448/+30.4207+129.9400/+30.4207+129.9200/+30.4214+129.9000/+30.4238+129.8800/+30.4273+129.8600/+30.4296+129.8400/+30.4328+129.8200/+30.4368+129.8000/+30.4400+129.7845/+30.4409+129.7800/+30.4449+129.7600/+30.4516+129.7400/+30.4584+129.7200/+30.4600+129.7036/+30.4604+129.7000/+30.4800+129.6820/+30.4867+129.6800/+30.5000+129.6610/+30.5063+129.6800/+30.5081+129.7000/+30.5073+129.7200/+30.5085+129.7400/+30.5093+129.7600/+30.5105+129.7800/+30.5115+129.8000/+30.5147+129.8200/+30.5157+129.8400/+30.5163+129.8600/+30.5158+129.8800/+30.5164+129.9000/+30.5105+129.9200/+30.5072+129.9400/+30.5080+129.9600/+30.5155+129.9800/+30.5200+129.9887/+30.5213+129.9800/+30.5296+129.9600/+30.5400+129.9471/+30.5424+129.9400/+30.5426+129.9200/+30.5471+129.9000/+30.5541+129.8800/+30.5600+129.8671/+30.5622+129.8600/+30.5695+129.8400/+30.5727+129.8200/+30.5800+129.8025/+30.5815+129.8000/+30.5962+129.7800/+30.6000+129.7771/+30.6091+129.7600/+30.6170+129.7400/+30.6200+129.7334/+30.6303+129.7200/+30.6400+129.7096/+30.6600+129.7044/+30.6787+129.7200/+30.6800+129.7228/+30.6845+129.7400/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4761+130.2000/+30.4600+130.2161/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4222+130.2000/+30.4400+130.1807/+30.4600+130.1814/+30.4761+130.2000/ 西 2 鹿児島県屋久島町 4650500 2026-09-05T12:00:00+09:00 2026-09-05T15:00:00+09:00 降灰 70 +30.5251+129.9800/+30.5288+130.0000/+30.5265+130.0200/+30.5200+130.0361/+30.5179+130.0400/+30.5153+130.0600/+30.5099+130.0800/+30.5026+130.1000/+30.5000+130.1035/+30.4958+130.1200/+30.4926+130.1400/+30.4800+130.1600/+30.4795+130.1800/+30.4798+130.2000/+30.4792+130.2200/+30.4600+130.2392/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2178/+30.4023+130.2000/+30.4003+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4001+130.1200/+30.4000+130.1149/+30.3893+130.1000/+30.3846+130.0800/+30.3835+130.0600/+30.3829+130.0400/+30.3825+130.0200/+30.3819+130.0000/+30.3822+129.9800/+30.3813+129.9600/+30.3804+129.9400/+30.3809+129.9200/+30.3800+129.9161/+30.3708+129.9000/+30.3716+129.8800/+30.3726+129.8600/+30.3749+129.8400/+30.3762+129.8200/+30.3727+129.8000/+30.3744+129.7800/+30.3765+129.7600/+30.3790+129.7400/+30.3800+129.7334/+30.3822+129.7200/+30.3818+129.7000/+30.3847+129.6800/+30.3879+129.6600/+30.3918+129.6400/+30.3968+129.6200/+30.4000+129.6089/+30.4059+129.6000/+30.4200+129.5811/+30.4208+129.5800/+30.4361+129.5600/+30.4400+129.5546/+30.4485+129.5600/+30.4600+129.5684/+30.4632+129.5800/+30.4677+129.6000/+30.4681+129.6200/+30.4684+129.6400/+30.4694+129.6600/+30.4709+129.6800/+30.4673+129.7000/+30.4671+129.7200/+30.4681+129.7400/+30.4689+129.7600/+30.4700+129.7800/+30.4708+129.8000/+30.4702+129.8200/+30.4708+129.8400/+30.4707+129.8600/+30.4715+129.8800/+30.4723+129.9000/+30.4635+129.9200/+30.4671+129.9400/+30.4689+129.9600/+30.4700+129.9800/+30.4690+130.0000/+30.4716+130.0200/+30.4748+130.0400/+30.4800+130.0542/+30.4861+130.0400/+30.4947+130.0200/+30.5000+130.0048/+30.5024+130.0000/+30.5157+129.9800/+30.5200+129.9724/+30.5251+129.9800/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4700+130.2000/+30.4600+130.2100/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4217+130.2000/+30.4363+130.1800/+30.4400+130.1745/+30.4470+130.1800/+30.4600+130.1858/+30.4700+130.2000/ 西 4 鹿児島県屋久島町 4650500 2026-09-05T15:00:00+09:00 2026-09-05T18:00:00+09:00 降灰 70 +30.4912+130.0000/+30.4916+130.0200/+30.4929+130.0400/+30.4948+130.0600/+30.4930+130.0800/+30.4912+130.1000/+30.4812+130.1200/+30.4800+130.1215/+30.4787+130.1400/+30.4787+130.1600/+30.4794+130.1800/+30.4797+130.2000/+30.4789+130.2200/+30.4600+130.2389/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2172/+30.4028+130.2000/+30.4004+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4001+130.1200/+30.4000+130.1070/+30.3953+130.1000/+30.3873+130.0800/+30.3852+130.0600/+30.3839+130.0400/+30.3830+130.0200/+30.3825+130.0000/+30.3821+129.9800/+30.3821+129.9600/+30.3821+129.9400/+30.3813+129.9200/+30.3800+129.9142/+30.3711+129.9000/+30.3719+129.8800/+30.3724+129.8600/+30.3713+129.8400/+30.3717+129.8200/+30.3697+129.8000/+30.3704+129.7800/+30.3710+129.7600/+30.3727+129.7400/+30.3750+129.7200/+30.3749+129.7000/+30.3774+129.6800/+30.3800+129.6630/+30.3805+129.6600/+30.3839+129.6400/+30.3876+129.6200/+30.3919+129.6000/+30.3957+129.5800/+30.4000+129.5615/+30.4050+129.5600/+30.4200+129.5516/+30.4318+129.5400/+30.4400+129.5203/+30.4422+129.5400/+30.4450+129.5600/+30.4480+129.5800/+30.4505+129.6000/+30.4518+129.6200/+30.4529+129.6400/+30.4569+129.6600/+30.4600+129.6695/+30.4620+129.6800/+30.4621+129.7000/+30.4648+129.7200/+30.4657+129.7400/+30.4665+129.7600/+30.4675+129.7800/+30.4684+129.8000/+30.4656+129.8200/+30.4664+129.8400/+30.4664+129.8600/+30.4685+129.8800/+30.4703+129.9000/+30.4600+129.9114/+30.4578+129.9200/+30.4583+129.9400/+30.4587+129.9600/+30.4592+129.9800/+30.4598+130.0000/+30.4600+130.0099/+30.4645+130.0000/+30.4800+129.9855/+30.4912+130.0000/ 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/+30.4325+130.1800/+30.4400+130.1690/+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、５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。 　５日０時から５日１８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 　０５日００時から０３時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日０３時から０６時まで　北西　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０５日０６時から０９時まで　北西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日０９時から１２時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０５日１２時から１５時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日１５時から１８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。