2026-08-23T17:00:00Z 通常 気象庁本庁 気象庁 2026-08-24T02:00:00+09:00 2026-08-24T03:00:00+09:00 2026-08-24T21:00:00+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、２４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 2026-08-24T03:00:00+09:00 2026-08-24T06:00:00+09:00 降灰 70 +30.4819+129.7800/+30.4885+129.8000/+30.4852+129.8200/+30.4848+129.8400/+30.4860+129.8600/+30.4863+129.8800/+30.4849+129.9000/+30.4800+129.9081/+30.4783+129.9200/+30.4777+129.9400/+30.4773+129.9600/+30.4764+129.9800/+30.4767+130.0000/+30.4770+130.0200/+30.4768+130.0400/+30.4771+130.0600/+30.4772+130.0800/+30.4774+130.1000/+30.4779+130.1200/+30.4784+130.1400/+30.4790+130.1600/+30.4796+130.1800/+30.4799+130.2000/+30.4796+130.2200/+30.4600+130.2396/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2143/+30.4057+130.2000/+30.4011+130.1800/+30.4008+130.1600/+30.4009+130.1400/+30.4010+130.1200/+30.4010+130.1000/+30.4007+130.0800/+30.4005+130.0600/+30.4002+130.0400/+30.4002+130.0200/+30.4000+130.0168/+30.3924+130.0000/+30.3936+129.9800/+30.3918+129.9600/+30.3908+129.9400/+30.3923+129.9200/+30.3890+129.9000/+30.3917+129.8800/+30.3959+129.8600/+30.3992+129.8400/+30.4000+129.8351/+30.4021+129.8200/+30.4064+129.8000/+30.4126+129.7800/+30.4200+129.7654/+30.4239+129.7600/+30.4360+129.7400/+30.4400+129.7348/+30.4470+129.7400/+30.4600+129.7526/+30.4657+129.7600/+30.4800+129.7756/+30.4819+129.7800/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4571+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4229+130.2000/+30.4400+130.1815/+30.4571+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-24T06:00:00+09:00 2026-08-24T09:00:00+09:00 降灰 70 +30.4707+130.1600/+30.4778+130.1800/+30.4796+130.2000/+30.4793+130.2200/+30.4600+130.2393/+30.4400+130.2399/+30.4200+130.2222/+30.4178+130.2200/+30.4003+130.2000/+30.4001+130.1800/+30.4000+130.1681/+30.3920+130.1600/+30.3824+130.1400/+30.3810+130.1200/+30.3800+130.1029/+30.3775+130.1000/+30.3672+130.0800/+30.3648+130.0600/+30.3626+130.0400/+30.3603+130.0200/+30.3601+130.0000/+30.3600+129.9989/+30.3512+129.9800/+30.3489+129.9600/+30.3504+129.9400/+30.3434+129.9200/+30.3435+129.9000/+30.3445+129.8800/+30.3459+129.8600/+30.3473+129.8400/+30.3484+129.8200/+30.3468+129.8000/+30.3510+129.7800/+30.3567+129.7600/+30.3600+129.7484/+30.3640+129.7400/+30.3771+129.7200/+30.3800+129.7166/+30.3913+129.7000/+30.4000+129.6867/+30.4059+129.7000/+30.4116+129.7200/+30.4183+129.7400/+30.4200+129.7467/+30.4228+129.7600/+30.4256+129.7800/+30.4282+129.8000/+30.4327+129.8200/+30.4351+129.8400/+30.4365+129.8600/+30.4395+129.8800/+30.4400+129.8824/+30.4449+129.9000/+30.4405+129.9200/+30.4448+129.9400/+30.4472+129.9600/+30.4483+129.9800/+30.4524+130.0000/+30.4559+130.0200/+30.4570+130.0400/+30.4584+130.0600/+30.4590+130.0800/+30.4596+130.1000/+30.4599+130.1200/+30.4600+130.1400/+30.4600+130.1410/+30.4707+130.1600/ 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/+30.4218+130.2000/+30.4400+130.1805/+30.4580+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-24T09:00:00+09:00 2026-08-24T12:00:00+09:00 降灰 70 +30.4841+129.7000/+30.4868+129.7200/+30.4862+129.7400/+30.4856+129.7600/+30.4815+129.7800/+30.4800+129.7868/+30.4764+129.8000/+30.4764+129.8200/+30.4763+129.8400/+30.4762+129.8600/+30.4774+129.8800/+30.4773+129.9000/+30.4742+129.9200/+30.4752+129.9400/+30.4741+129.9600/+30.4729+129.9800/+30.4737+130.0000/+30.4732+130.0200/+30.4729+130.0400/+30.4724+130.0600/+30.4718+130.0800/+30.4719+130.1000/+30.4732+130.1200/+30.4746+130.1400/+30.4773+130.1600/+30.4792+130.1800/+30.4797+130.2000/+30.4792+130.2200/+30.4600+130.2392/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2192/+30.4009+130.2000/+30.4002+130.1800/+30.4002+130.1600/+30.4000+130.1510/+30.3898+130.1400/+30.3835+130.1200/+30.3819+130.1000/+30.3810+130.0800/+30.3806+130.0600/+30.3800+130.0418/+30.3795+130.0400/+30.3706+130.0200/+30.3708+130.0000/+30.3715+129.9800/+30.3734+129.9600/+30.3740+129.9400/+30.3800+129.9206/+30.3801+129.9200/+30.3800+129.9195/+30.3733+129.9000/+30.3754+129.8800/+30.3800+129.8600/+30.3881+129.8400/+30.3951+129.8200/+30.3993+129.8000/+30.4000+129.7987/+30.4089+129.7800/+30.4165+129.7600/+30.4200+129.7497/+30.4238+129.7400/+30.4336+129.7200/+30.4400+129.7025/+30.4457+129.7000/+30.4600+129.6938/+30.4800+129.6945/+30.4841+129.7000/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4579+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1803/+30.4579+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-24T12:00:00+09:00 2026-08-24T15:00:00+09:00 降灰 70 +30.4621+129.7800/+30.4644+129.8000/+30.4640+129.8200/+30.4653+129.8400/+30.4661+129.8600/+30.4673+129.8800/+30.4690+129.9000/+30.4600+129.9123/+30.4584+129.9200/+30.4581+129.9400/+30.4581+129.9600/+30.4581+129.9800/+30.4583+130.0000/+30.4586+130.0200/+30.4587+130.0400/+30.4589+130.0600/+30.4593+130.0800/+30.4596+130.1000/+30.4598+130.1200/+30.4599+130.1400/+30.4600+130.1600/+30.4600+130.1611/+30.4773+130.1800/+30.4796+130.2000/+30.4791+130.2200/+30.4600+130.2391/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2191/+30.4010+130.2000/+30.4002+130.1800/+30.4002+130.1600/+30.4001+130.1400/+30.4000+130.1296/+30.3916+130.1200/+30.3851+130.1000/+30.3835+130.0800/+30.3830+130.0600/+30.3827+130.0400/+30.3831+130.0200/+30.3832+130.0000/+30.3827+129.9800/+30.3838+129.9600/+30.3837+129.9400/+30.3836+129.9200/+30.3800+129.9028/+30.3786+129.9000/+30.3800+129.8812/+30.3801+129.8800/+30.3803+129.8600/+30.3818+129.8400/+30.3833+129.8200/+30.3816+129.8000/+30.3858+129.7800/+30.3918+129.7600/+30.3910+129.7400/+30.3902+129.7200/+30.3902+129.7000/+30.3942+129.6800/+30.3989+129.6600/+30.4000+129.6563/+30.4124+129.6600/+30.4200+129.6630/+30.4400+129.6731/+30.4422+129.6800/+30.4538+129.7000/+30.4555+129.7200/+30.4573+129.7400/+30.4588+129.7600/+30.4600+129.7662/+30.4621+129.7800/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4574+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4227+130.2000/+30.4400+130.1806/+30.4574+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-24T15:00:00+09:00 2026-08-24T18:00:00+09:00 降灰 70 +30.4631+129.6400/+30.4690+129.6600/+30.4728+129.6800/+30.4795+129.7000/+30.4782+129.7200/+30.4779+129.7400/+30.4778+129.7600/+30.4766+129.7800/+30.4758+129.8000/+30.4746+129.8200/+30.4741+129.8400/+30.4737+129.8600/+30.4731+129.8800/+30.4733+129.9000/+30.4670+129.9200/+30.4668+129.9400/+30.4668+129.9600/+30.4640+129.9800/+30.4620+130.0000/+30.4636+130.0200/+30.4649+130.0400/+30.4650+130.0600/+30.4616+130.0800/+30.4639+130.1000/+30.4669+130.1200/+30.4708+130.1400/+30.4755+130.1600/+30.4789+130.1800/+30.4797+130.2000/+30.4793+130.2200/+30.4600+130.2393/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2183/+30.4017+130.2000/+30.4003+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4001+130.1200/+30.4000+130.1128/+30.3901+130.1000/+30.3851+130.0800/+30.3837+130.0600/+30.3835+130.0400/+30.3836+130.0200/+30.3835+130.0000/+30.3838+129.9800/+30.3845+129.9600/+30.3843+129.9400/+30.3849+129.9200/+30.3821+129.9000/+30.3847+129.8800/+30.3868+129.8600/+30.3892+129.8400/+30.3923+129.8200/+30.3980+129.8000/+30.4000+129.7947/+30.4026+129.7800/+30.4068+129.7600/+30.4105+129.7400/+30.4152+129.7200/+30.4200+129.7006/+30.4202+129.7000/+30.4299+129.6800/+30.4351+129.6600/+30.4400+129.6427/+30.4455+129.6400/+30.4600+129.6322/+30.4631+129.6400/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4593+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1806/+30.4593+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-08-24T18:00:00+09:00 2026-08-24T21:00:00+09:00 降灰 70 +30.4610+129.7800/+30.4629+129.8000/+30.4600+129.8062/+30.4556+129.8200/+30.4560+129.8400/+30.4572+129.8600/+30.4580+129.8800/+30.4590+129.9000/+30.4543+129.9200/+30.4546+129.9400/+30.4562+129.9600/+30.4568+129.9800/+30.4573+130.0000/+30.4580+130.0200/+30.4587+130.0400/+30.4591+130.0600/+30.4595+130.0800/+30.4597+130.1000/+30.4599+130.1200/+30.4600+130.1400/+30.4600+130.1436/+30.4702+130.1600/+30.4782+130.1800/+30.4797+130.2000/+30.4790+130.2200/+30.4600+130.2390/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2158/+30.4042+130.2000/+30.4004+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4002+130.1200/+30.4001+130.1000/+30.4000+130.0942/+30.3890+130.0800/+30.3843+130.0600/+30.3829+130.0400/+30.3822+130.0200/+30.3817+130.0000/+30.3815+129.9800/+30.3811+129.9600/+30.3804+129.9400/+30.3800+129.9234/+30.3793+129.9200/+30.3667+129.9000/+30.3669+129.8800/+30.3676+129.8600/+30.3682+129.8400/+30.3685+129.8200/+30.3670+129.8000/+30.3688+129.7800/+30.3714+129.7600/+30.3729+129.7400/+30.3749+129.7200/+30.3749+129.7000/+30.3781+129.6800/+30.3800+129.6697/+30.3820+129.6600/+30.3868+129.6400/+30.3933+129.6200/+30.4000+129.6044/+30.4200+129.6136/+30.4288+129.6200/+30.4400+129.6327/+30.4424+129.6400/+30.4471+129.6600/+30.4500+129.6800/+30.4549+129.7000/+30.4548+129.7200/+30.4568+129.7400/+30.4586+129.7600/+30.4600+129.7708/+30.4610+129.7800/ 西 60 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/+30.4218+130.2000/+30.4400+130.1800/+30.4582+130.2000/ 南西 2 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、２４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。 　２４日３時から２４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 　２４日０３時から０６時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２４日０６時から０９時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２４日０９時から１２時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２４日１２時から１５時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２４日１５時から１８時まで　西　　　　　　　６０ｋｍ　　２ｋｍ　　　　　 　２４日１８時から２１時まで　西　　　　　　　６０ｋｍ　　２ｋｍ　　　　　 　 　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。