2026-08-25T02:00:00Z 通常 気象庁本庁 気象庁 2026-08-25T11:00:00+09:00 2026-08-25T12:00:00+09:00 2026-08-26T06:00:00+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、２５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 2026-08-25T12:00:00+09:00 2026-08-25T15:00:00+09:00 降灰 70 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西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4513+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+130.1620/+30.4513+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-25T15:00:00+09:00 2026-08-25T18:00:00+09:00 降灰 70 +30.4624+129.9000/+30.4600+129.9035/+30.4562+129.9200/+30.4573+129.9400/+30.4580+129.9600/+30.4583+129.9800/+30.4590+130.0000/+30.4595+130.0200/+30.4599+130.0400/+30.4600+130.0486/+30.4621+130.0600/+30.4661+130.0800/+30.4668+130.1000/+30.4710+130.1200/+30.4757+130.1400/+30.4782+130.1600/+30.4794+130.1800/+30.4796+130.2000/+30.4772+130.2200/+30.4600+130.2372/+30.4400+130.2395/+30.4205+130.2200/+30.4200+130.2172/+30.4029+130.2000/+30.4004+130.1800/+30.4002+130.1600/+30.4001+130.1400/+30.4000+130.1319/+30.3888+130.1200/+30.3825+130.1000/+30.3814+130.0800/+30.3807+130.0600/+30.3800+130.0485/+30.3734+130.0400/+30.3665+130.0200/+30.3633+130.0000/+30.3615+129.9800/+30.3603+129.9600/+30.3600+129.9574/+30.3522+129.9400/+30.3416+129.9200/+30.3404+129.9000/+30.3400+129.8938/+30.3383+129.8800/+30.3360+129.8600/+30.3344+129.8400/+30.3325+129.8200/+30.3291+129.8000/+30.3288+129.7800/+30.3283+129.7600/+30.3290+129.7400/+30.3300+129.7200/+30.3296+129.7000/+30.3312+129.6800/+30.3330+129.6600/+30.3353+129.6400/+30.3386+129.6200/+30.3400+129.6123/+30.3430+129.6000/+30.3465+129.5800/+30.3507+129.5600/+30.3542+129.5400/+30.3564+129.5200/+30.3592+129.5000/+30.3600+129.4987/+30.3800+129.4843/+30.3862+129.4800/+30.4000+129.4707/+30.4029+129.4800/+30.4085+129.5000/+30.4117+129.5200/+30.4145+129.5400/+30.4185+129.5600/+30.4200+129.5663/+30.4231+129.5800/+30.4272+129.6000/+30.4290+129.6200/+30.4309+129.6400/+30.4331+129.6600/+30.4352+129.6800/+30.4369+129.7000/+30.4384+129.7200/+30.4400+129.7264/+30.4448+129.7400/+30.4502+129.7600/+30.4542+129.7800/+30.4573+129.8000/+30.4553+129.8200/+30.4573+129.8400/+30.4587+129.8600/+30.4599+129.8800/+30.4600+129.8809/+30.4624+129.9000/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4704+130.1800/+30.4704+130.2000/+30.4600+130.2104/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4268+130.1800/+30.4400+130.1611/+30.4600+130.1633/+30.4704+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-25T18:00:00+09:00 2026-08-25T21:00:00+09:00 降灰 70 +30.5018+129.5200/+30.5055+129.5400/+30.5073+129.5600/+30.5075+129.5800/+30.5078+129.6000/+30.5093+129.6200/+30.5105+129.6400/+30.5118+129.6600/+30.5129+129.6800/+30.5140+129.7000/+30.5093+129.7200/+30.5112+129.7400/+30.5124+129.7600/+30.5122+129.7800/+30.5120+129.8000/+30.5101+129.8200/+30.5098+129.8400/+30.5098+129.8600/+30.5092+129.8800/+30.5087+129.9000/+30.5000+129.9106/+30.4970+129.9200/+30.4967+129.9400/+30.4961+129.9600/+30.4953+129.9800/+30.4947+130.0000/+30.4936+130.0200/+30.4913+130.0400/+30.4872+130.0600/+30.4800+130.0777/+30.4800+130.0800/+30.4797+130.1000/+30.4796+130.1200/+30.4797+130.1400/+30.4797+130.1600/+30.4798+130.1800/+30.4798+130.2000/+30.4785+130.2200/+30.4600+130.2385/+30.4400+130.2396/+30.4204+130.2200/+30.4200+130.2000/+30.4200+130.1980/+30.4029+130.1800/+30.4010+130.1600/+30.4008+130.1400/+30.4008+130.1200/+30.4009+130.1000/+30.4010+130.0800/+30.4009+130.0600/+30.4006+130.0400/+30.4004+130.0200/+30.4000+130.0073/+30.3978+130.0000/+30.3949+129.9800/+30.3963+129.9600/+30.3926+129.9400/+30.3947+129.9200/+30.3862+129.9000/+30.3867+129.8800/+30.3884+129.8600/+30.3913+129.8400/+30.3936+129.8200/+30.3937+129.8000/+30.3948+129.7800/+30.3960+129.7600/+30.3999+129.7400/+30.4000+129.7395/+30.4028+129.7200/+30.4067+129.7000/+30.4104+129.6800/+30.4146+129.6600/+30.4181+129.6400/+30.4200+129.6266/+30.4210+129.6200/+30.4247+129.6000/+30.4297+129.5800/+30.4353+129.5600/+30.4400+129.5452/+30.4437+129.5400/+30.4592+129.5200/+30.4600+129.5190/+30.4800+129.5159/+30.5000+129.5113/+30.5018+129.5200/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4706+130.1800/+30.4766+130.2000/+30.4600+130.2166/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4290+130.1800/+30.4400+130.1632/+30.4600+130.1623/+30.4706+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-25T21:00:00+09:00 2026-08-26T00:00:00+09:00 降灰 70 +30.5660+129.5600/+30.5718+129.5800/+30.5750+129.6000/+30.5753+129.6200/+30.5755+129.6400/+30.5762+129.6600/+30.5772+129.6800/+30.5780+129.7000/+30.5791+129.7200/+30.5767+129.7400/+30.5743+129.7600/+30.5694+129.7800/+30.5631+129.8000/+30.5600+129.8091/+30.5584+129.8200/+30.5569+129.8400/+30.5516+129.8600/+30.5489+129.8800/+30.5441+129.9000/+30.5400+129.9092/+30.5387+129.9200/+30.5340+129.9400/+30.5292+129.9600/+30.5241+129.9800/+30.5200+129.9932/+30.5196+130.0000/+30.5171+130.0200/+30.5159+130.0400/+30.5113+130.0600/+30.5000+130.0781/+30.4999+130.0800/+30.4990+130.1000/+30.4985+130.1200/+30.4972+130.1400/+30.4944+130.1600/+30.4845+130.1800/+30.4800+130.1848/+30.4799+130.2000/+30.4793+130.2200/+30.4600+130.2393/+30.4400+130.2397/+30.4203+130.2200/+30.4201+130.2000/+30.4200+130.1800/+30.4200+130.1612/+30.4190+130.1600/+30.4107+130.1400/+30.4113+130.1200/+30.4111+130.1000/+30.4126+130.0800/+30.4139+130.0600/+30.4168+130.0400/+30.4175+130.0200/+30.4191+130.0000/+30.4200+129.9977/+30.4217+129.9800/+30.4219+129.9600/+30.4225+129.9400/+30.4261+129.9200/+30.4251+129.9000/+30.4280+129.8800/+30.4335+129.8600/+30.4362+129.8400/+30.4400+129.8211/+30.4402+129.8200/+30.4444+129.8000/+30.4486+129.7800/+30.4543+129.7600/+30.4595+129.7400/+30.4600+129.7383/+30.4658+129.7200/+30.4734+129.7000/+30.4781+129.6800/+30.4800+129.6757/+30.4886+129.6600/+30.4991+129.6400/+30.5000+129.6373/+30.5087+129.6200/+30.5183+129.6000/+30.5200+129.5964/+30.5281+129.5800/+30.5381+129.5600/+30.5400+129.5561/+30.5600+129.5479/+30.5660+129.5600/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4687+130.1800/+30.4775+130.2000/+30.4600+130.2175/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4316+130.1800/+30.4400+130.1678/+30.4600+130.1663/+30.4687+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-26T00:00:00+09:00 2026-08-26T03:00:00+09:00 降灰 70 +30.6405+129.6000/+30.6400+129.6012/+30.6310+129.6200/+30.6282+129.6400/+30.6272+129.6600/+30.6269+129.6800/+30.6268+129.7000/+30.6253+129.7200/+30.6222+129.7400/+30.6200+129.7505/+30.6186+129.7600/+30.6131+129.7800/+30.6054+129.8000/+30.6000+129.8093/+30.5970+129.8200/+30.5929+129.8400/+30.5883+129.8600/+30.5836+129.8800/+30.5800+129.8910/+30.5781+129.9000/+30.5739+129.9200/+30.5600+129.9355/+30.5585+129.9400/+30.5562+129.9600/+30.5519+129.9800/+30.5400+129.9991/+30.5398+130.0000/+30.5374+130.0200/+30.5351+130.0400/+30.5253+130.0600/+30.5200+130.0660/+30.5190+130.0800/+30.5176+130.1000/+30.5103+130.1200/+30.5000+130.1312/+30.4996+130.1400/+30.4992+130.1600/+30.4980+130.1800/+30.4830+130.2000/+30.4800+130.2030/+30.4796+130.2200/+30.4600+130.2396/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2000/+30.4201+130.1800/+30.4202+130.1600/+30.4205+130.1400/+30.4213+130.1200/+30.4231+130.1000/+30.4268+130.0800/+30.4332+130.0600/+30.4400+130.0501/+30.4413+130.0400/+30.4432+130.0200/+30.4465+130.0000/+30.4482+129.9800/+30.4515+129.9600/+30.4599+129.9400/+30.4600+129.9399/+30.4658+129.9200/+30.4643+129.9000/+30.4703+129.8800/+30.4800+129.8611/+30.4804+129.8600/+30.4867+129.8400/+30.4931+129.8200/+30.4966+129.8000/+30.5000+129.7879/+30.5027+129.7800/+30.5124+129.7600/+30.5200+129.7476/+30.5234+129.7400/+30.5331+129.7200/+30.5344+129.7000/+30.5400+129.6866/+30.5442+129.6800/+30.5579+129.6600/+30.5600+129.6565/+30.5699+129.6400/+30.5789+129.6200/+30.5800+129.6177/+30.5880+129.6000/+30.5981+129.5800/+30.6000+129.5766/+30.6200+129.5784/+30.6272+129.5800/+30.6400+129.5935/+30.6405+129.6000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4731+130.1800/+30.4781+130.2000/+30.4600+130.2181/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4213+130.2000/+30.4400+130.1806/+30.4501+130.1800/+30.4600+130.1708/+30.4731+130.1800/ 北西 4 鹿児島県屋久島町 4650500 2026-08-26T03:00:00+09:00 2026-08-26T06:00:00+09:00 降灰 70 +30.6622+129.6000/+30.6613+129.6200/+30.6606+129.6400/+30.6600+129.6448/+30.6571+129.6600/+30.6520+129.6800/+30.6485+129.7000/+30.6417+129.7200/+30.6400+129.7256/+30.6375+129.7400/+30.6320+129.7600/+30.6284+129.7800/+30.6253+129.8000/+30.6217+129.8200/+30.6200+129.8281/+30.6171+129.8400/+30.6002+129.8600/+30.6000+129.8603/+30.5961+129.8800/+30.5927+129.9000/+30.5878+129.9200/+30.5822+129.9400/+30.5800+129.9422/+30.5707+129.9600/+30.5600+129.9761/+30.5592+129.9800/+30.5558+130.0000/+30.5499+130.0200/+30.5400+130.0325/+30.5390+130.0400/+30.5365+130.0600/+30.5288+130.0800/+30.5200+130.0893/+30.5191+130.1000/+30.5177+130.1200/+30.5021+130.1400/+30.5000+130.1422/+30.4996+130.1600/+30.4990+130.1800/+30.4916+130.2000/+30.4800+130.2116/+30.4797+130.2200/+30.4600+130.2397/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2000/+30.4201+130.1800/+30.4204+130.1600/+30.4214+130.1400/+30.4253+130.1200/+30.4400+130.1006/+30.4401+130.1000/+30.4414+130.0800/+30.4434+130.0600/+30.4473+130.0400/+30.4550+130.0200/+30.4600+130.0121/+30.4620+130.0000/+30.4647+129.9800/+30.4715+129.9600/+30.4800+129.9428/+30.4808+129.9400/+30.4846+129.9200/+30.4856+129.9000/+30.4912+129.8800/+30.5000+129.8620/+30.5011+129.8600/+30.5074+129.8400/+30.5146+129.8200/+30.5200+129.8052/+30.5215+129.8000/+30.5275+129.7800/+30.5355+129.7600/+30.5400+129.7468/+30.5428+129.7400/+30.5540+129.7200/+30.5600+129.7070/+30.5631+129.7000/+30.5704+129.6800/+30.5792+129.6600/+30.5800+129.6581/+30.5889+129.6400/+30.6000+129.6205/+30.6012+129.6200/+30.6200+129.6067/+30.6250+129.6000/+30.6382+129.5800/+30.6400+129.5771/+30.6484+129.5800/+30.6600+129.5873/+30.6622+129.6000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4776+130.1800/+30.4780+130.2000/+30.4600+130.2180/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4400+130.1809/+30.4524+130.1800/+30.4600+130.1724/+30.4776+130.1800/ 北西 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、２５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。 　２５日１２時から２６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 　２５日１２時から１５時まで　西　　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　２５日１５時から１８時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　２５日１８時から２１時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　２５日２１時から２４時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２６日００時から０３時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２６日０３時から０６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。