2026-09-04T20:00:00Z 通常 気象庁本庁 気象庁 2026-09-05T05:00:00+09:00 2026-09-05T06:00:00+09:00 2026-09-06T00:00:00+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、５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 2026-09-05T06:00:00+09:00 2026-09-05T09:00:00+09:00 降灰 70 +30.6425+129.8000/+30.6418+129.8200/+30.6414+129.8400/+30.6400+129.8433/+30.6350+129.8400/+30.6362+129.8200/+30.6370+129.8000/+30.6400+129.7973/+30.6425+129.8000/ +30.6265+129.8600/+30.6206+129.8800/+30.6200+129.8816/+30.6160+129.9000/+30.6146+129.9200/+30.6075+129.9400/+30.6000+129.9534/+30.5970+129.9600/+30.5905+129.9800/+30.5800+129.9955/+30.5760+130.0000/+30.5663+130.0200/+30.5600+130.0292/+30.5560+130.0400/+30.5508+130.0600/+30.5400+130.0739/+30.5370+130.0800/+30.5302+130.1000/+30.5200+130.1126/+30.5178+130.1200/+30.5107+130.1400/+30.5000+130.1516/+30.4989+130.1600/+30.4937+130.1800/+30.4800+130.1938/+30.4799+130.2000/+30.4797+130.2200/+30.4600+130.2397/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2000/+30.4200+130.1915/+30.4106+130.1800/+30.4105+130.1600/+30.4144+130.1400/+30.4200+130.1282/+30.4203+130.1200/+30.4214+130.1000/+30.4240+130.0800/+30.4292+130.0600/+30.4381+130.0400/+30.4400+130.0335/+30.4407+130.0200/+30.4422+130.0000/+30.4441+129.9800/+30.4502+129.9600/+30.4531+129.9400/+30.4541+129.9200/+30.4576+129.9000/+30.4600+129.8919/+30.4625+129.8800/+30.4651+129.8600/+30.4708+129.8400/+30.4777+129.8200/+30.4800+129.8124/+30.4843+129.8000/+30.4890+129.7800/+30.4958+129.7600/+30.5000+129.7480/+30.5029+129.7400/+30.5108+129.7200/+30.5200+129.7065/+30.5295+129.7000/+30.5400+129.6853/+30.5593+129.6800/+30.5600+129.6798/+30.5602+129.6800/+30.5727+129.7000/+30.5800+129.7157/+30.5812+129.7200/+30.5834+129.7400/+30.5849+129.7600/+30.5876+129.7800/+30.5895+129.8000/+30.5919+129.8200/+30.5914+129.8400/+30.5924+129.8600/+30.6000+129.8704/+30.6130+129.8600/+30.6200+129.8510/+30.6265+129.8600/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4652+130.1800/+30.4763+130.2000/+30.4600+130.2163/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4217+130.2000/+30.4361+130.1800/+30.4400+130.1751/+30.4600+130.1718/+30.4652+130.1800/ 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 +30.5047+129.5600/+30.5078+129.5800/+30.5101+129.6000/+30.5094+129.6200/+30.5087+129.6400/+30.5082+129.6600/+30.5078+129.6800/+30.5067+129.7000/+30.5050+129.7200/+30.5049+129.7400/+30.5049+129.7600/+30.5052+129.7800/+30.5056+129.8000/+30.5000+129.8172/+30.4993+129.8200/+30.4982+129.8400/+30.4965+129.8600/+30.4945+129.8800/+30.4918+129.9000/+30.4800+129.9187/+30.4798+129.9200/+30.4781+129.9400/+30.4777+129.9600/+30.4780+129.9800/+30.4778+130.0000/+30.4778+130.0200/+30.4781+130.0400/+30.4785+130.0600/+30.4787+130.0800/+30.4792+130.1000/+30.4798+130.1200/+30.4793+130.1400/+30.4789+130.1600/+30.4795+130.1800/+30.4798+130.2000/+30.4795+130.2200/+30.4600+130.2395/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2165/+30.4035+130.2000/+30.4005+130.1800/+30.4003+130.1600/+30.4004+130.1400/+30.4004+130.1200/+30.4004+130.1000/+30.4003+130.0800/+30.4002+130.0600/+30.4001+130.0400/+30.4001+130.0200/+30.4000+130.0111/+30.3985+130.0000/+30.3967+129.9800/+30.3995+129.9600/+30.4000+129.9586/+30.4016+129.9400/+30.4047+129.9200/+30.4000+129.9020/+30.3986+129.9000/+30.4000+129.8934/+30.4020+129.8800/+30.4054+129.8600/+30.4081+129.8400/+30.4122+129.8200/+30.4115+129.8000/+30.4147+129.7800/+30.4195+129.7600/+30.4200+129.7573/+30.4242+129.7400/+30.4315+129.7200/+30.4398+129.7000/+30.4400+129.6991/+30.4478+129.6800/+30.4600+129.6638/+30.4662+129.6600/+30.4794+129.6400/+30.4800+129.6377/+30.4837+129.6200/+30.4864+129.6000/+30.4911+129.5800/+30.4956+129.5600/+30.5000+129.5461/+30.5047+129.5600/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4709+130.2000/+30.4600+130.2109/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4221+130.2000/+30.4400+130.1801/+30.4600+130.1870/+30.4709+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 +30.5022+129.9400/+30.5047+129.9600/+30.5014+129.9800/+30.5035+130.0000/+30.5000+130.0130/+30.4984+130.0200/+30.4945+130.0400/+30.4938+130.0600/+30.4908+130.0800/+30.4883+130.1000/+30.4800+130.1184/+30.4796+130.1200/+30.4763+130.1400/+30.4756+130.1600/+30.4780+130.1800/+30.4795+130.2000/+30.4784+130.2200/+30.4600+130.2384/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2191/+30.4009+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4000+130.1412/+30.3988+130.1400/+30.3824+130.1200/+30.3810+130.1000/+30.3806+130.0800/+30.3800+130.0600/+30.3800+130.0599/+30.3667+130.0400/+30.3637+130.0200/+30.3625+130.0000/+30.3615+129.9800/+30.3600+129.9676/+30.3549+129.9600/+30.3498+129.9400/+30.3408+129.9200/+30.3406+129.9000/+30.3400+129.8882/+30.3392+129.8800/+30.3361+129.8600/+30.3351+129.8400/+30.3349+129.8200/+30.3319+129.8000/+30.3328+129.7800/+30.3338+129.7600/+30.3336+129.7400/+30.3335+129.7200/+30.3276+129.7000/+30.3304+129.6800/+30.3339+129.6600/+30.3365+129.6400/+30.3377+129.6200/+30.3388+129.6000/+30.3400+129.5909/+30.3437+129.5800/+30.3518+129.5600/+30.3594+129.5400/+30.3600+129.5378/+30.3610+129.5400/+30.3757+129.5600/+30.3800+129.5644/+30.3955+129.5800/+30.4000+129.5844/+30.4033+129.6000/+30.4072+129.6200/+30.4104+129.6400/+30.4143+129.6600/+30.4184+129.6800/+30.4183+129.7000/+30.4200+129.7160/+30.4204+129.7200/+30.4237+129.7400/+30.4262+129.7600/+30.4294+129.7800/+30.4330+129.8000/+30.4338+129.8200/+30.4365+129.8400/+30.4387+129.8600/+30.4400+129.8679/+30.4430+129.8800/+30.4470+129.9000/+30.4400+129.9082/+30.4369+129.9200/+30.4379+129.9400/+30.4393+129.9600/+30.4400+129.9753/+30.4423+129.9800/+30.4490+130.0000/+30.4538+130.0200/+30.4587+130.0400/+30.4600+130.0440/+30.4622+130.0400/+30.4645+130.0200/+30.4672+130.0000/+30.4800+129.9804/+30.4845+129.9800/+30.4901+129.9600/+30.4970+129.9400/+30.5000+129.9344/+30.5022+129.9400/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4489+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4213+130.2000/+30.4304+130.1800/+30.4400+130.1664/+30.4489+130.1800/ 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 +30.4746+130.0200/+30.4799+130.0400/+30.4790+130.0600/+30.4765+130.0800/+30.4757+130.1000/+30.4742+130.1200/+30.4746+130.1400/+30.4739+130.1600/+30.4770+130.1800/+30.4791+130.2000/+30.4776+130.2200/+30.4600+130.2376/+30.4400+130.2397/+30.4202+130.2200/+30.4200+130.2193/+30.4008+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4000+130.1477/+30.3923+130.1400/+30.3816+130.1200/+30.3807+130.1000/+30.3803+130.0800/+30.3800+130.0757/+30.3672+130.0600/+30.3628+130.0400/+30.3613+130.0200/+30.3600+130.0027/+30.3580+130.0000/+30.3501+129.9800/+30.3444+129.9600/+30.3424+129.9400/+30.3400+129.9336/+30.3276+129.9200/+30.3259+129.9000/+30.3242+129.8800/+30.3224+129.8600/+30.3212+129.8400/+30.3202+129.8200/+30.3200+129.8177/+30.3144+129.8000/+30.3113+129.7800/+30.3086+129.7600/+30.3092+129.7400/+30.3112+129.7200/+30.3102+129.7000/+30.3111+129.6800/+30.3122+129.6600/+30.3132+129.6400/+30.3145+129.6200/+30.3162+129.6000/+30.3189+129.5800/+30.3200+129.5731/+30.3223+129.5600/+30.3251+129.5400/+30.3271+129.5200/+30.3294+129.5000/+30.3361+129.4800/+30.3400+129.4702/+30.3525+129.4800/+30.3600+129.4862/+30.3629+129.5000/+30.3656+129.5200/+30.3683+129.5400/+30.3718+129.5600/+30.3757+129.5800/+30.3792+129.6000/+30.3800+129.6033/+30.3840+129.6200/+30.3882+129.6400/+30.3924+129.6600/+30.3972+129.6800/+30.3984+129.7000/+30.4000+129.7079/+30.4030+129.7200/+30.4104+129.7400/+30.4153+129.7600/+30.4188+129.7800/+30.4200+129.7887/+30.4215+129.8000/+30.4200+129.8021/+30.4150+129.8200/+30.4168+129.8400/+30.4183+129.8600/+30.4200+129.8787/+30.4207+129.8800/+30.4325+129.9000/+30.4290+129.9200/+30.4321+129.9400/+30.4354+129.9600/+30.4375+129.9800/+30.4387+130.0000/+30.4395+130.0200/+30.4400+130.0400/+30.4400+130.0403/+30.4407+130.0400/+30.4503+130.0200/+30.4600+130.0083/+30.4746+130.0200/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4508+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4281+130.1800/+30.4400+130.1630/+30.4508+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 +30.4669+129.9400/+30.4720+129.9600/+30.4724+129.9800/+30.4736+130.0000/+30.4727+130.0200/+30.4739+130.0400/+30.4729+130.0600/+30.4717+130.0800/+30.4731+130.1000/+30.4699+130.1200/+30.4700+130.1400/+30.4696+130.1600/+30.4769+130.1800/+30.4790+130.2000/+30.4772+130.2200/+30.4600+130.2372/+30.4400+130.2397/+30.4203+130.2200/+30.4200+130.2187/+30.4013+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4001+130.1400/+30.4000+130.1322/+30.3882+130.1200/+30.3819+130.1000/+30.3810+130.0800/+30.3805+130.0600/+30.3800+130.0478/+30.3735+130.0400/+30.3656+130.0200/+30.3630+130.0000/+30.3616+129.9800/+30.3603+129.9600/+30.3600+129.9576/+30.3507+129.9400/+30.3400+129.9224/+30.3376+129.9200/+30.3349+129.9000/+30.3326+129.8800/+30.3304+129.8600/+30.3287+129.8400/+30.3275+129.8200/+30.3248+129.8000/+30.3247+129.7800/+30.3245+129.7600/+30.3244+129.7400/+30.3243+129.7200/+30.3200+129.7071/+30.3168+129.7000/+30.3167+129.6800/+30.3165+129.6600/+30.3174+129.6400/+30.3197+129.6200/+30.3200+129.6180/+30.3226+129.6000/+30.3253+129.5800/+30.3286+129.5600/+30.3307+129.5400/+30.3309+129.5200/+30.3311+129.5000/+30.3315+129.4800/+30.3319+129.4600/+30.3349+129.4400/+30.3400+129.4230/+30.3470+129.4200/+30.3600+129.4143/+30.3627+129.4200/+30.3706+129.4400/+30.3744+129.4600/+30.3757+129.4800/+30.3770+129.5000/+30.3790+129.5200/+30.3800+129.5306/+30.3809+129.5400/+30.3855+129.5600/+30.3917+129.5800/+30.3968+129.6000/+30.4000+129.6060/+30.4059+129.6200/+30.4123+129.6400/+30.4170+129.6600/+30.4200+129.6759/+30.4207+129.6800/+30.4200+129.6871/+30.4191+129.7000/+30.4200+129.7138/+30.4204+129.7200/+30.4222+129.7400/+30.4237+129.7600/+30.4273+129.7800/+30.4307+129.8000/+30.4204+129.8200/+30.4295+129.8400/+30.4356+129.8600/+30.4400+129.8772/+30.4411+129.8800/+30.4476+129.9000/+30.4400+129.9061/+30.4347+129.9200/+30.4372+129.9400/+30.4381+129.9600/+30.4391+129.9800/+30.4399+130.0000/+30.4400+130.0028/+30.4421+130.0000/+30.4491+129.9800/+30.4519+129.9600/+30.4561+129.9400/+30.4600+129.9335/+30.4669+129.9400/ 西 80 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4522+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+130.1613/+30.4522+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-05T21:00:00+09:00 2026-09-06T00:00:00+09:00 降灰 70 +30.4605+129.9600/+30.4680+129.9800/+30.4735+130.0000/+30.4745+130.0200/+30.4736+130.0400/+30.4738+130.0600/+30.4730+130.0800/+30.4728+130.1000/+30.4729+130.1200/+30.4731+130.1400/+30.4730+130.1600/+30.4773+130.1800/+30.4791+130.2000/+30.4780+130.2200/+30.4600+130.2380/+30.4400+130.2397/+30.4203+130.2200/+30.4200+130.2187/+30.4013+130.2000/+30.4002+130.1800/+30.4001+130.1600/+30.4001+130.1400/+30.4000+130.1286/+30.3916+130.1200/+30.3823+130.1000/+30.3811+130.0800/+30.3807+130.0600/+30.3802+130.0400/+30.3800+130.0355/+30.3692+130.0200/+30.3639+130.0000/+30.3624+129.9800/+30.3612+129.9600/+30.3600+129.9461/+30.3563+129.9400/+30.3405+129.9200/+30.3400+129.9163/+30.3377+129.9000/+30.3353+129.8800/+30.3331+129.8600/+30.3311+129.8400/+30.3294+129.8200/+30.3261+129.8000/+30.3256+129.7800/+30.3250+129.7600/+30.3241+129.7400/+30.3231+129.7200/+30.3200+129.7100/+30.3157+129.7000/+30.3169+129.6800/+30.3184+129.6600/+30.3200+129.6413/+30.3201+129.6400/+30.3221+129.6200/+30.3245+129.6000/+30.3270+129.5800/+30.3301+129.5600/+30.3319+129.5400/+30.3318+129.5200/+30.3318+129.5000/+30.3346+129.4800/+30.3380+129.4600/+30.3400+129.4450/+30.3600+129.4521/+30.3611+129.4600/+30.3651+129.4800/+30.3689+129.5000/+30.3705+129.5200/+30.3723+129.5400/+30.3765+129.5600/+30.3800+129.5723/+30.3821+129.5800/+30.3870+129.6000/+30.3966+129.6200/+30.4000+129.6268/+30.4055+129.6400/+30.4125+129.6600/+30.4179+129.6800/+30.4165+129.7000/+30.4197+129.7200/+30.4200+129.7215/+30.4227+129.7400/+30.4250+129.7600/+30.4276+129.7800/+30.4305+129.8000/+30.4200+129.8178/+30.4194+129.8200/+30.4200+129.8261/+30.4261+129.8400/+30.4330+129.8600/+30.4400+129.8790/+30.4405+129.8800/+30.4476+129.9000/+30.4400+129.9071/+30.4356+129.9200/+30.4377+129.9400/+30.4385+129.9600/+30.4394+129.9800/+30.4400+129.9909/+30.4493+129.9800/+30.4595+129.9600/+30.4600+129.9563/+30.4605+129.9600/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4522+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4272+130.1800/+30.4400+130.1622/+30.4522+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、５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。 　５日６時から５日２４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０６時から０９時まで　西　　　　　　　５０ｋｍ　　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　　　　　　　７０ｋｍ　　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　　　　　　　８０ｋｍ　　４ｋｍ　　　　　 　０５日２１時から２４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。