2026-08-23T23:00:00Z 通常 気象庁本庁 気象庁 2026-08-24T08:00:00+09:00 2026-08-24T09:00:00+09:00 2026-08-25T03:00:00+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、２４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 2026-08-24T09:00:00+09:00 2026-08-24T12:00:00+09:00 降灰 70 +30.4841+129.7600/+30.4902+129.7800/+30.4935+129.8000/+30.4958+129.8200/+30.4955+129.8400/+30.4958+129.8600/+30.4965+129.8800/+30.4971+129.9000/+30.4940+129.9200/+30.4930+129.9400/+30.4911+129.9600/+30.4894+129.9800/+30.4822+130.0000/+30.4800+130.0045/+30.4787+130.0200/+30.4781+130.0400/+30.4781+130.0600/+30.4780+130.0800/+30.4779+130.1000/+30.4783+130.1200/+30.4787+130.1400/+30.4790+130.1600/+30.4795+130.1800/+30.4798+130.2000/+30.4793+130.2200/+30.4600+130.2393/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2197/+30.4005+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4000+130.1574/+30.3845+130.1400/+30.3821+130.1200/+30.3810+130.1000/+30.3800+130.0837/+30.3776+130.0800/+30.3711+130.0600/+30.3699+130.0400/+30.3683+130.0200/+30.3682+130.0000/+30.3684+129.9800/+30.3646+129.9600/+30.3699+129.9400/+30.3693+129.9200/+30.3698+129.9000/+30.3722+129.8800/+30.3757+129.8600/+30.3800+129.8485/+30.3868+129.8400/+30.4000+129.8244/+30.4079+129.8200/+30.4200+129.8133/+30.4400+129.8091/+30.4536+129.8000/+30.4600+129.7871/+30.4640+129.7800/+30.4755+129.7600/+30.4800+129.7508/+30.4841+129.7600/ 西 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4575+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4225+130.2000/+30.4400+130.1809/+30.4575+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 +30.4750+130.1800/+30.4795+130.2000/+30.4789+130.2200/+30.4600+130.2389/+30.4400+130.2398/+30.4201+130.2200/+30.4200+130.2194/+30.4007+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4000+130.1427/+30.3974+130.1400/+30.3838+130.1200/+30.3817+130.1000/+30.3811+130.0800/+30.3806+130.0600/+30.3800+130.0456/+30.3768+130.0400/+30.3745+130.0200/+30.3691+130.0000/+30.3679+129.9800/+30.3655+129.9600/+30.3645+129.9400/+30.3636+129.9200/+30.3611+129.9000/+30.3603+129.8800/+30.3600+129.8738/+30.3572+129.8600/+30.3575+129.8400/+30.3550+129.8200/+30.3458+129.8000/+30.3452+129.7800/+30.3446+129.7600/+30.3444+129.7400/+30.3443+129.7200/+30.3505+129.7000/+30.3554+129.6800/+30.3600+129.6642/+30.3646+129.6600/+30.3800+129.6481/+30.3944+129.6400/+30.4000+129.6372/+30.4008+129.6400/+30.4061+129.6600/+30.4111+129.6800/+30.4148+129.7000/+30.4200+129.7191/+30.4202+129.7200/+30.4247+129.7400/+30.4280+129.7600/+30.4325+129.7800/+30.4356+129.8000/+30.4392+129.8200/+30.4400+129.8244/+30.4433+129.8400/+30.4460+129.8600/+30.4506+129.8800/+30.4530+129.9000/+30.4487+129.9200/+30.4451+129.9400/+30.4523+129.9600/+30.4524+129.9800/+30.4539+130.0000/+30.4555+130.0200/+30.4567+130.0400/+30.4574+130.0600/+30.4584+130.0800/+30.4591+130.1000/+30.4596+130.1200/+30.4598+130.1400/+30.4599+130.1600/+30.4600+130.1641/+30.4750+130.1800/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4655+130.2000/+30.4600+130.2055/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4219+130.2000/+30.4384+130.1800/+30.4400+130.1779/+30.4414+130.1800/+30.4600+130.1945/+30.4655+130.2000/ 西 4 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 +30.4709+130.1600/+30.4784+130.1800/+30.4797+130.2000/+30.4791+130.2200/+30.4600+130.2391/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2187/+30.4013+130.2000/+30.4002+130.1800/+30.4002+130.1600/+30.4001+130.1400/+30.4000+130.1311/+30.3897+130.1200/+30.3829+130.1000/+30.3817+130.0800/+30.3812+130.0600/+30.3807+130.0400/+30.3801+130.0200/+30.3800+130.0172/+30.3723+130.0000/+30.3677+129.9800/+30.3664+129.9600/+30.3650+129.9400/+30.3640+129.9200/+30.3611+129.9000/+30.3605+129.8800/+30.3600+129.8627/+30.3597+129.8600/+30.3579+129.8400/+30.3559+129.8200/+30.3506+129.8000/+30.3553+129.7800/+30.3600+129.7645/+30.3610+129.7600/+30.3611+129.7400/+30.3611+129.7200/+30.3647+129.7000/+30.3693+129.6800/+30.3753+129.6600/+30.3800+129.6432/+30.3810+129.6400/+30.3855+129.6200/+30.3905+129.6000/+30.3992+129.5800/+30.4000+129.5783/+30.4009+129.5800/+30.4091+129.6000/+30.4133+129.6200/+30.4168+129.6400/+30.4200+129.6535/+30.4214+129.6600/+30.4264+129.6800/+30.4315+129.7000/+30.4344+129.7200/+30.4359+129.7400/+30.4372+129.7600/+30.4400+129.7709/+30.4435+129.7800/+30.4496+129.8000/+30.4493+129.8200/+30.4515+129.8400/+30.4532+129.8600/+30.4553+129.8800/+30.4572+129.9000/+30.4532+129.9200/+30.4532+129.9400/+30.4547+129.9600/+30.4564+129.9800/+30.4570+130.0000/+30.4577+130.0200/+30.4585+130.0400/+30.4590+130.0600/+30.4594+130.0800/+30.4597+130.1000/+30.4599+130.1200/+30.4600+130.1400/+30.4600+130.1419/+30.4709+130.1600/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4648+130.2000/+30.4600+130.2048/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1803/+30.4600+130.1951/+30.4648+130.2000/ 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 +30.4609+129.5600/+30.4639+129.5800/+30.4664+129.6000/+30.4683+129.6200/+30.4696+129.6400/+30.4725+129.6600/+30.4759+129.6800/+30.4734+129.7000/+30.4733+129.7200/+30.4730+129.7400/+30.4728+129.7600/+30.4728+129.7800/+30.4727+129.8000/+30.4712+129.8200/+30.4717+129.8400/+30.4721+129.8600/+30.4722+129.8800/+30.4729+129.9000/+30.4680+129.9200/+30.4667+129.9400/+30.4638+129.9600/+30.4647+129.9800/+30.4641+130.0000/+30.4641+130.0200/+30.4650+130.0400/+30.4638+130.0600/+30.4664+130.0800/+30.4692+130.1000/+30.4710+130.1200/+30.4746+130.1400/+30.4771+130.1600/+30.4790+130.1800/+30.4797+130.2000/+30.4791+130.2200/+30.4600+130.2391/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2179/+30.4021+130.2000/+30.4003+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4001+130.1200/+30.4000+130.1177/+30.3871+130.1000/+30.3837+130.0800/+30.3825+130.0600/+30.3819+130.0400/+30.3812+130.0200/+30.3806+130.0000/+30.3802+129.9800/+30.3800+129.9726/+30.3779+129.9600/+30.3758+129.9400/+30.3790+129.9200/+30.3687+129.9000/+30.3691+129.8800/+30.3699+129.8600/+30.3709+129.8400/+30.3720+129.8200/+30.3712+129.8000/+30.3748+129.7800/+30.3800+129.7601/+30.3800+129.7600/+30.3827+129.7400/+30.3862+129.7200/+30.3866+129.7000/+30.3922+129.6800/+30.4000+129.6626/+30.4023+129.6600/+30.4159+129.6400/+30.4200+129.6305/+30.4243+129.6200/+30.4318+129.6000/+30.4352+129.5800/+30.4387+129.5600/+30.4400+129.5556/+30.4600+129.5557/+30.4609+129.5600/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4675+130.2000/+30.4600+130.2075/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4218+130.2000/+30.4398+130.1800/+30.4400+130.1798/+30.4402+130.1800/+30.4600+130.1924/+30.4675+130.2000/ 西 4 鹿児島県屋久島町 4650500 2026-08-24T21:00:00+09:00 2026-08-25T00:00:00+09:00 降灰 70 +30.4770+130.1800/+30.4795+130.2000/+30.4787+130.2200/+30.4600+130.2387/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2195/+30.4006+130.2000/+30.4001+130.1800/+30.4001+130.1600/+30.4000+130.1532/+30.3871+130.1400/+30.3815+130.1200/+30.3807+130.1000/+30.3800+130.0866/+30.3742+130.0800/+30.3650+130.0600/+30.3633+130.0400/+30.3616+130.0200/+30.3600+130.0036/+30.3578+130.0000/+30.3512+129.9800/+30.3476+129.9600/+30.3428+129.9400/+30.3400+129.9283/+30.3348+129.9200/+30.3360+129.9000/+30.3363+129.8800/+30.3355+129.8600/+30.3352+129.8400/+30.3348+129.8200/+30.3318+129.8000/+30.3325+129.7800/+30.3334+129.7600/+30.3344+129.7400/+30.3355+129.7200/+30.3384+129.7000/+30.3400+129.6891/+30.3421+129.6800/+30.3471+129.6600/+30.3531+129.6400/+30.3600+129.6222/+30.3625+129.6200/+30.3800+129.6078/+30.3966+129.6000/+30.4000+129.5986/+30.4005+129.6000/+30.4071+129.6200/+30.4122+129.6400/+30.4155+129.6600/+30.4177+129.6800/+30.4199+129.7000/+30.4200+129.7007/+30.4233+129.7200/+30.4269+129.7400/+30.4299+129.7600/+30.4322+129.7800/+30.4353+129.8000/+30.4362+129.8200/+30.4376+129.8400/+30.4392+129.8600/+30.4400+129.8639/+30.4446+129.8800/+30.4480+129.9000/+30.4400+129.9120/+30.4384+129.9200/+30.4394+129.9400/+30.4400+129.9585/+30.4403+129.9600/+30.4434+129.9800/+30.4495+130.0000/+30.4534+130.0200/+30.4557+130.0400/+30.4571+130.0600/+30.4585+130.0800/+30.4592+130.1000/+30.4596+130.1200/+30.4598+130.1400/+30.4599+130.1600/+30.4600+130.1622/+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 +30.4421+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4376+130.1800/+30.4400+130.1770/+30.4421+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-25T00:00:00+09:00 2026-08-25T03:00:00+09:00 降灰 70 +30.4774+130.1800/+30.4795+130.2000/+30.4783+130.2200/+30.4600+130.2382/+30.4400+130.2398/+30.4201+130.2200/+30.4200+130.2196/+30.4005+130.2000/+30.4001+130.1800/+30.4001+130.1600/+30.4000+130.1567/+30.3840+130.1400/+30.3812+130.1200/+30.3806+130.1000/+30.3800+130.0905/+30.3709+130.0800/+30.3646+130.0600/+30.3625+130.0400/+30.3606+130.0200/+30.3600+130.0149/+30.3513+130.0000/+30.3481+129.9800/+30.3446+129.9600/+30.3427+129.9400/+30.3400+129.9299/+30.3330+129.9200/+30.3323+129.9000/+30.3308+129.8800/+30.3287+129.8600/+30.3298+129.8400/+30.3308+129.8200/+30.3293+129.8000/+30.3293+129.7800/+30.3294+129.7600/+30.3317+129.7400/+30.3348+129.7200/+30.3354+129.7000/+30.3391+129.6800/+30.3400+129.6757/+30.3455+129.6600/+30.3510+129.6400/+30.3544+129.6200/+30.3584+129.6000/+30.3600+129.5967/+30.3800+129.5811/+30.3816+129.5800/+30.4000+129.5685/+30.4038+129.5800/+30.4093+129.6000/+30.4122+129.6200/+30.4147+129.6400/+30.4177+129.6600/+30.4200+129.6729/+30.4212+129.6800/+30.4227+129.7000/+30.4240+129.7200/+30.4265+129.7400/+30.4285+129.7600/+30.4304+129.7800/+30.4325+129.8000/+30.4356+129.8200/+30.4389+129.8400/+30.4400+129.8490/+30.4421+129.8600/+30.4445+129.8800/+30.4470+129.9000/+30.4400+129.9106/+30.4380+129.9200/+30.4390+129.9400/+30.4400+129.9600/+30.4400+129.9614/+30.4424+129.9800/+30.4505+130.0000/+30.4533+130.0200/+30.4551+130.0400/+30.4572+130.0600/+30.4582+130.0800/+30.4591+130.1000/+30.4596+130.1200/+30.4598+130.1400/+30.4600+130.1600/+30.4600+130.1616/+30.4774+130.1800/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4442+130.1800/+30.4585+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4215+130.2000/+30.4351+130.1800/+30.4400+130.1737/+30.4442+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、２４日０９時から１２時までは火口から西方向、２４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。 　２４日９時から２５日３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０９時から１２時まで　西　　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　２４日１２時から１５時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　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　　４ｋｍ　　　　　 　２４日２１時から２４時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２５日００時から０３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。