2026-09-04T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-05T02:00:00+09:00 2026-09-05T03:00:00+09:00 2026-09-05T21:00:00+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 2026-09-05T03:00:00+09:00 2026-09-05T06:00:00+09:00 降灰 70 +30.6815+129.8400/+30.6800+129.8423/+30.6677+129.8400/+30.6800+129.8214/+30.6815+129.8400/ +30.6624+129.8600/+30.6628+129.8800/+30.6600+129.8855/+30.6550+129.9000/+30.6481+129.9200/+30.6400+129.9355/+30.6367+129.9400/+30.6268+129.9600/+30.6200+129.9725/+30.6172+129.9800/+30.6000+129.9931/+30.5965+130.0000/+30.5835+130.0200/+30.5800+130.0238/+30.5755+130.0400/+30.5600+130.0577/+30.5588+130.0600/+30.5529+130.0800/+30.5400+130.0940/+30.5375+130.1000/+30.5275+130.1200/+30.5200+130.1277/+30.5168+130.1400/+30.5000+130.1588/+30.4997+130.1600/+30.4965+130.1800/+30.4800+130.1969/+30.4799+130.2000/+30.4795+130.2200/+30.4600+130.2395/+30.4400+130.2398/+30.4202+130.2200/+30.4201+130.2000/+30.4200+130.1800/+30.4200+130.1769/+30.4090+130.1600/+30.4064+130.1400/+30.4086+130.1200/+30.4121+130.1000/+30.4140+130.0800/+30.4173+130.0600/+30.4200+130.0497/+30.4204+130.0400/+30.4213+130.0200/+30.4225+130.0000/+30.4244+129.9800/+30.4265+129.9600/+30.4291+129.9400/+30.4323+129.9200/+30.4320+129.9000/+30.4372+129.8800/+30.4400+129.8686/+30.4421+129.8600/+30.4464+129.8400/+30.4513+129.8200/+30.4547+129.8000/+30.4591+129.7800/+30.4600+129.7763/+30.4647+129.7600/+30.4718+129.7400/+30.4800+129.7245/+30.4836+129.7200/+30.4931+129.7000/+30.5000+129.6809/+30.5010+129.6800/+30.5200+129.6617/+30.5215+129.6600/+30.5327+129.6400/+30.5382+129.6200/+30.5400+129.6127/+30.5490+129.6200/+30.5600+129.6382/+30.5601+129.6400/+30.5628+129.6600/+30.5659+129.6800/+30.5681+129.7000/+30.5767+129.7200/+30.5777+129.7400/+30.5786+129.7600/+30.5773+129.7800/+30.5762+129.8000/+30.5748+129.8200/+30.5683+129.8400/+30.5669+129.8600/+30.5644+129.8800/+30.5640+129.9000/+30.5800+129.9182/+30.5920+129.9000/+30.6000+129.8928/+30.6092+129.8800/+30.6200+129.8671/+30.6282+129.8600/+30.6400+129.8438/+30.6600+129.8476/+30.6624+129.8600/ +30.5693+129.9400/+30.5613+129.9600/+30.5600+129.9634/+30.5433+129.9800/+30.5400+129.9864/+30.5395+129.9800/+30.5400+129.9600/+30.5520+129.9400/+30.5600+129.9229/+30.5693+129.9400/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4652+130.1800/+30.4773+130.2000/+30.4600+130.2173/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4349+130.1800/+30.4400+130.1718/+30.4600+130.1718/+30.4652+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 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+30.6026+129.6400/+30.6014+129.6600/+30.6000+129.6650/+30.5888+129.6600/+30.5917+129.6400/+30.6000+129.6231/+30.6026+129.6400/ +30.5719+129.9400/+30.5625+129.9600/+30.5600+129.9637/+30.5551+129.9600/+30.5542+129.9400/+30.5600+129.9256/+30.5719+129.9400/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4608+130.1800/+30.4771+130.2000/+30.4600+130.2171/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1809/+30.4582+130.1800/+30.4600+130.1788/+30.4608+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 +30.5003+129.5800/+30.5034+129.6000/+30.5054+129.6200/+30.5072+129.6400/+30.5083+129.6600/+30.5089+129.6800/+30.5104+129.7000/+30.5067+129.7200/+30.5059+129.7400/+30.5051+129.7600/+30.5067+129.7800/+30.5079+129.8000/+30.5057+129.8200/+30.5056+129.8400/+30.5050+129.8600/+30.5052+129.8800/+30.5053+129.9000/+30.5000+129.9059/+30.4951+129.9200/+30.4943+129.9400/+30.4929+129.9600/+30.4919+129.9800/+30.4909+130.0000/+30.4862+130.0200/+30.4800+130.0308/+30.4796+130.0400/+30.4796+130.0600/+30.4795+130.0800/+30.4797+130.1000/+30.4800+130.1132/+30.4835+130.1200/+30.4800+130.1389/+30.4800+130.1400/+30.4798+130.1600/+30.4798+130.1800/+30.4799+130.2000/+30.4795+130.2200/+30.4600+130.2395/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2000/+30.4200+130.1992/+30.4024+130.1800/+30.4012+130.1600/+30.4012+130.1400/+30.4016+130.1200/+30.4021+130.1000/+30.4025+130.0800/+30.4034+130.0600/+30.4046+130.0400/+30.4075+130.0200/+30.4081+130.0000/+30.4088+129.9800/+30.4129+129.9600/+30.4147+129.9400/+30.4177+129.9200/+30.4129+129.9000/+30.4185+129.8800/+30.4200+129.8740/+30.4210+129.8600/+30.4225+129.8400/+30.4238+129.8200/+30.4200+129.8061/+30.4170+129.8000/+30.4200+129.7817/+30.4203+129.7800/+30.4250+129.7600/+30.4270+129.7400/+30.4294+129.7200/+30.4339+129.7000/+30.4343+129.6800/+30.4387+129.6600/+30.4400+129.6541/+30.4472+129.6400/+30.4570+129.6200/+30.4600+129.6141/+30.4800+129.6023/+30.4825+129.6000/+30.4989+129.5800/+30.5000+129.5782/+30.5003+129.5800/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4724+130.2000/+30.4600+130.2124/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1802/+30.4600+130.1825/+30.4724+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 +30.4921+130.0200/+30.4883+130.0400/+30.4958+130.0600/+30.4929+130.0800/+30.4906+130.1000/+30.4891+130.1200/+30.4800+130.1351/+30.4790+130.1400/+30.4783+130.1600/+30.4791+130.1800/+30.4797+130.2000/+30.4789+130.2200/+30.4600+130.2389/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2188/+30.4012+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4000+130.1400/+30.4000+130.1397/+30.3836+130.1200/+30.3817+130.1000/+30.3810+130.0800/+30.3800+130.0600/+30.3800+130.0596/+30.3696+130.0400/+30.3660+130.0200/+30.3645+130.0000/+30.3634+129.9800/+30.3620+129.9600/+30.3602+129.9400/+30.3607+129.9200/+30.3600+129.9150/+30.3517+129.9000/+30.3510+129.8800/+30.3513+129.8600/+30.3504+129.8400/+30.3509+129.8200/+30.3498+129.8000/+30.3548+129.7800/+30.3600+129.7643/+30.3612+129.7600/+30.3634+129.7400/+30.3656+129.7200/+30.3703+129.7000/+30.3757+129.6800/+30.3800+129.6673/+30.3830+129.6600/+30.3903+129.6400/+30.3957+129.6200/+30.4000+129.6057/+30.4101+129.6200/+30.4200+129.6384/+30.4207+129.6400/+30.4335+129.6600/+30.4400+129.6698/+30.4441+129.6800/+30.4521+129.7000/+30.4569+129.7200/+30.4574+129.7400/+30.4579+129.7600/+30.4596+129.7800/+30.4600+129.7856/+30.4610+129.8000/+30.4606+129.8200/+30.4632+129.8400/+30.4661+129.8600/+30.4665+129.8800/+30.4669+129.9000/+30.4600+129.9186/+30.4597+129.9200/+30.4589+129.9400/+30.4600+129.9541/+30.4615+129.9600/+30.4621+129.9800/+30.4662+130.0000/+30.4800+130.0177/+30.4921+130.0200/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4678+130.2000/+30.4600+130.2078/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4217+130.2000/+30.4352+130.1800/+30.4400+130.1733/+30.4522+130.1800/+30.4600+130.1842/+30.4678+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 +30.4828+130.0400/+30.4800+130.0522/+30.4749+130.0400/+30.4800+130.0315/+30.4828+130.0400/ +30.4664+130.0800/+30.4600+130.0932/+30.4599+130.1000/+30.4600+130.1200/+30.4600+130.1400/+30.4600+130.1402/+30.4686+130.1600/+30.4778+130.1800/+30.4795+130.2000/+30.4782+130.2200/+30.4600+130.2382/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2188/+30.4013+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4001+130.1400/+30.4000+130.1357/+30.3858+130.1200/+30.3819+130.1000/+30.3811+130.0800/+30.3805+130.0600/+30.3800+130.0502/+30.3726+130.0400/+30.3666+130.0200/+30.3639+130.0000/+30.3627+129.9800/+30.3611+129.9600/+30.3606+129.9400/+30.3600+129.9339/+30.3497+129.9200/+30.3448+129.9000/+30.3432+129.8800/+30.3414+129.8600/+30.3412+129.8400/+30.3411+129.8200/+30.3400+129.8149/+30.3359+129.8000/+30.3362+129.7800/+30.3366+129.7600/+30.3384+129.7400/+30.3400+129.7260/+30.3408+129.7200/+30.3429+129.7000/+30.3459+129.6800/+30.3495+129.6600/+30.3516+129.6400/+30.3513+129.6200/+30.3510+129.6000/+30.3555+129.5800/+30.3600+129.5624/+30.3608+129.5600/+30.3674+129.5400/+30.3735+129.5200/+30.3794+129.5000/+30.3800+129.4987/+30.3881+129.4800/+30.3969+129.4600/+30.4000+129.4525/+30.4023+129.4600/+30.4077+129.4800/+30.4119+129.5000/+30.4142+129.5200/+30.4161+129.5400/+30.4184+129.5600/+30.4200+129.5719/+30.4210+129.5800/+30.4232+129.6000/+30.4243+129.6200/+30.4254+129.6400/+30.4273+129.6600/+30.4299+129.6800/+30.4285+129.7000/+30.4298+129.7200/+30.4318+129.7400/+30.4335+129.7600/+30.4347+129.7800/+30.4379+129.8000/+30.4387+129.8200/+30.4400+129.8367/+30.4405+129.8400/+30.4440+129.8600/+30.4471+129.8800/+30.4502+129.9000/+30.4400+129.9123/+30.4384+129.9200/+30.4388+129.9400/+30.4394+129.9600/+30.4400+129.9773/+30.4409+129.9800/+30.4492+130.0000/+30.4547+130.0200/+30.4582+130.0400/+30.4593+130.0600/+30.4600+130.0717/+30.4664+130.0800/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4479+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4213+130.2000/+30.4315+130.1800/+30.4400+130.1678/+30.4479+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-05T18:00:00+09:00 2026-09-05T21:00:00+09:00 降灰 70 +30.4601+129.7400/+30.4617+129.7600/+30.4628+129.7800/+30.4638+129.8000/+30.4600+129.8068/+30.4556+129.8200/+30.4563+129.8400/+30.4572+129.8600/+30.4583+129.8800/+30.4594+129.9000/+30.4547+129.9200/+30.4556+129.9400/+30.4568+129.9600/+30.4574+129.9800/+30.4580+130.0000/+30.4585+130.0200/+30.4591+130.0400/+30.4596+130.0600/+30.4597+130.0800/+30.4598+130.1000/+30.4599+130.1200/+30.4600+130.1400/+30.4600+130.1401/+30.4726+130.1600/+30.4787+130.1800/+30.4795+130.2000/+30.4781+130.2200/+30.4600+130.2381/+30.4400+130.2397/+30.4203+130.2200/+30.4200+130.2159/+30.4041+130.2000/+30.4004+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4002+130.1200/+30.4001+130.1000/+30.4000+130.0932/+30.3898+130.0800/+30.3847+130.0600/+30.3832+130.0400/+30.3824+130.0200/+30.3817+130.0000/+30.3812+129.9800/+30.3808+129.9600/+30.3803+129.9400/+30.3800+129.9288/+30.3783+129.9200/+30.3659+129.9000/+30.3660+129.8800/+30.3663+129.8600/+30.3662+129.8400/+30.3660+129.8200/+30.3642+129.8000/+30.3648+129.7800/+30.3655+129.7600/+30.3655+129.7400/+30.3655+129.7200/+30.3626+129.7000/+30.3647+129.6800/+30.3674+129.6600/+30.3701+129.6400/+30.3727+129.6200/+30.3760+129.6000/+30.3785+129.5800/+30.3800+129.5698/+30.3815+129.5600/+30.3849+129.5400/+30.3890+129.5200/+30.3941+129.5000/+30.3965+129.4800/+30.3991+129.4600/+30.4000+129.4506/+30.4055+129.4600/+30.4135+129.4800/+30.4169+129.5000/+30.4200+129.5056/+30.4258+129.5200/+30.4310+129.5400/+30.4345+129.5600/+30.4372+129.5800/+30.4392+129.6000/+30.4400+129.6030/+30.4442+129.6200/+30.4482+129.6400/+30.4517+129.6600/+30.4546+129.6800/+30.4574+129.7000/+30.4581+129.7200/+30.4600+129.7392/+30.4601+129.7400/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4493+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4308+130.1800/+30.4400+130.1661/+30.4493+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３時から５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 　０５日０３時から０６時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日０６時から０９時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０５日０９時から１２時まで　西　　　　　　　６０ｋｍ　　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　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０５日１８時から２１時まで　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。