2026-09-01T23:00:00Z 通常 気象庁本庁 気象庁 2026-09-02T08:00:00+09:00 2026-09-02T09:00:00+09:00 2026-09-03T03:00:00+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、２日０９時から１２時までは火口から西方向、２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 2026-09-02T09:00:00+09:00 2026-09-02T12:00:00+09:00 降灰 70 +30.5352+129.7200/+30.5354+129.7400/+30.5356+129.7600/+30.5378+129.7800/+30.5396+129.8000/+30.5366+129.8200/+30.5355+129.8400/+30.5335+129.8600/+30.5331+129.8800/+30.5326+129.9000/+30.5274+129.9200/+30.5200+129.9316/+30.5184+129.9400/+30.5179+129.9600/+30.5164+129.9800/+30.5139+130.0000/+30.5110+130.0200/+30.5007+130.0400/+30.5000+130.0411/+30.4987+130.0600/+30.4974+130.0800/+30.4964+130.1000/+30.4932+130.1200/+30.4800+130.1363/+30.4799+130.1400/+30.4798+130.1600/+30.4799+130.1800/+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+130.1850/+30.4153+130.1800/+30.4090+130.1600/+30.4091+130.1400/+30.4156+130.1200/+30.4200+130.1108/+30.4203+130.1000/+30.4208+130.0800/+30.4229+130.0600/+30.4268+130.0400/+30.4344+130.0200/+30.4400+130.0040/+30.4403+130.0000/+30.4427+129.9800/+30.4442+129.9600/+30.4481+129.9400/+30.4553+129.9200/+30.4533+129.9000/+30.4592+129.8800/+30.4600+129.8773/+30.4641+129.8600/+30.4691+129.8400/+30.4741+129.8200/+30.4778+129.8000/+30.4800+129.7935/+30.4865+129.7800/+30.4952+129.7600/+30.4999+129.7400/+30.5000+129.7395/+30.5037+129.7200/+30.5200+129.7080/+30.5352+129.7200/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4236+130.2000/+30.4400+130.1824/+30.4584+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-02T12:00:00+09:00 2026-09-02T15:00:00+09:00 降灰 70 +30.5028+129.6800/+30.5018+129.7000/+30.5020+129.7200/+30.5016+129.7400/+30.5014+129.7600/+30.5014+129.7800/+30.5013+129.8000/+30.5000+129.8127/+30.4995+129.8200/+30.5000+129.8249/+30.5021+129.8400/+30.5055+129.8600/+30.5066+129.8800/+30.5059+129.9000/+30.5000+129.9062/+30.4938+129.9200/+30.4923+129.9400/+30.4913+129.9600/+30.4873+129.9800/+30.4825+130.0000/+30.4800+130.0071/+30.4796+130.0200/+30.4793+130.0400/+30.4792+130.0600/+30.4792+130.0800/+30.4791+130.1000/+30.4793+130.1200/+30.4794+130.1400/+30.4796+130.1600/+30.4798+130.1800/+30.4799+130.2000/+30.4796+130.2200/+30.4600+130.2396/+30.4400+130.2399/+30.4201+130.2200/+30.4200+130.2000/+30.4200+130.1975/+30.4037+130.1800/+30.4020+130.1600/+30.4019+130.1400/+30.4026+130.1200/+30.4032+130.1000/+30.4042+130.0800/+30.4050+130.0600/+30.4056+130.0400/+30.4074+130.0200/+30.4086+130.0000/+30.4121+129.9800/+30.4166+129.9600/+30.4175+129.9400/+30.4200+129.9323/+30.4211+129.9200/+30.4206+129.9000/+30.4218+129.8800/+30.4232+129.8600/+30.4250+129.8400/+30.4274+129.8200/+30.4267+129.8000/+30.4328+129.7800/+30.4400+129.7614/+30.4408+129.7600/+30.4460+129.7400/+30.4511+129.7200/+30.4562+129.7000/+30.4600+129.6931/+30.4800+129.6817/+30.4889+129.6800/+30.5000+129.6691/+30.5028+129.6800/ 西 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4585+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4229+130.2000/+30.4400+130.1807/+30.4585+130.2000/ 南西 2 鹿児島県屋久島町 4650500 2026-09-02T15:00:00+09:00 2026-09-02T18:00:00+09:00 降灰 70 +30.4614+129.7400/+30.4628+129.7600/+30.4642+129.7800/+30.4654+129.8000/+30.4600+129.8164/+30.4591+129.8200/+30.4600+129.8304/+30.4613+129.8400/+30.4645+129.8600/+30.4667+129.8800/+30.4688+129.9000/+30.4600+129.9103/+30.4577+129.9200/+30.4579+129.9400/+30.4587+129.9600/+30.4590+129.9800/+30.4593+130.0000/+30.4595+130.0200/+30.4597+130.0400/+30.4599+130.0600/+30.4600+130.0800/+30.4600+130.0828/+30.4649+130.1000/+30.4705+130.1200/+30.4743+130.1400/+30.4776+130.1600/+30.4794+130.1800/+30.4797+130.2000/+30.4788+130.2200/+30.4600+130.2388/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2050/+30.4150+130.2000/+30.4011+130.1800/+30.4005+130.1600/+30.4005+130.1400/+30.4005+130.1200/+30.4005+130.1000/+30.4004+130.0800/+30.4002+130.0600/+30.4000+130.0517/+30.3938+130.0400/+30.3886+130.0200/+30.3872+130.0000/+30.3845+129.9800/+30.3844+129.9600/+30.3832+129.9400/+30.3839+129.9200/+30.3800+129.9087/+30.3729+129.9000/+30.3724+129.8800/+30.3730+129.8600/+30.3734+129.8400/+30.3740+129.8200/+30.3708+129.8000/+30.3716+129.7800/+30.3726+129.7600/+30.3727+129.7400/+30.3727+129.7200/+30.3706+129.7000/+30.3729+129.6800/+30.3757+129.6600/+30.3784+129.6400/+30.3800+129.6268/+30.3809+129.6200/+30.3841+129.6000/+30.3868+129.5800/+30.3898+129.5600/+30.3940+129.5400/+30.4000+129.5205/+30.4109+129.5400/+30.4180+129.5600/+30.4200+129.5689/+30.4222+129.5800/+30.4256+129.6000/+30.4322+129.6200/+30.4379+129.6400/+30.4400+129.6467/+30.4440+129.6600/+30.4501+129.6800/+30.4567+129.7000/+30.4598+129.7200/+30.4600+129.7221/+30.4614+129.7400/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4456+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4214+130.2000/+30.4344+130.1800/+30.4400+130.1718/+30.4456+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-02T18:00:00+09:00 2026-09-02T21:00:00+09:00 降灰 70 +30.4626+130.1600/+30.4777+130.1800/+30.4794+130.2000/+30.4782+130.2200/+30.4600+130.2382/+30.4400+130.2398/+30.4202+130.2200/+30.4200+130.2177/+30.4023+130.2000/+30.4003+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4002+130.1200/+30.4002+130.1000/+30.4000+130.0915/+30.3902+130.0800/+30.3838+130.0600/+30.3822+130.0400/+30.3816+130.0200/+30.3812+130.0000/+30.3805+129.9800/+30.3800+129.9712/+30.3740+129.9600/+30.3699+129.9400/+30.3677+129.9200/+30.3627+129.9000/+30.3619+129.8800/+30.3606+129.8600/+30.3600+129.8465/+30.3584+129.8400/+30.3560+129.8200/+30.3461+129.8000/+30.3460+129.7800/+30.3460+129.7600/+30.3449+129.7400/+30.3439+129.7200/+30.3441+129.7000/+30.3451+129.6800/+30.3464+129.6600/+30.3481+129.6400/+30.3501+129.6200/+30.3526+129.6000/+30.3546+129.5800/+30.3570+129.5600/+30.3600+129.5424/+30.3608+129.5400/+30.3695+129.5200/+30.3799+129.5000/+30.3800+129.4999/+30.3926+129.4800/+30.4000+129.4660/+30.4027+129.4800/+30.4060+129.5000/+30.4094+129.5200/+30.4123+129.5400/+30.4147+129.5600/+30.4167+129.5800/+30.4185+129.6000/+30.4200+129.6090/+30.4217+129.6200/+30.4245+129.6400/+30.4279+129.6600/+30.4315+129.6800/+30.4304+129.7000/+30.4325+129.7200/+30.4342+129.7400/+30.4356+129.7600/+30.4375+129.7800/+30.4400+129.7930/+30.4442+129.8000/+30.4449+129.8200/+30.4479+129.8400/+30.4510+129.8600/+30.4537+129.8800/+30.4552+129.9000/+30.4400+129.9190/+30.4398+129.9200/+30.4400+129.9244/+30.4461+129.9400/+30.4529+129.9600/+30.4536+129.9800/+30.4553+130.0000/+30.4572+130.0200/+30.4582+130.0400/+30.4589+130.0600/+30.4595+130.0800/+30.4597+130.1000/+30.4599+130.1200/+30.4600+130.1400/+30.4600+130.1553/+30.4626+130.1600/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4495+130.1800/+30.4588+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4305+130.1800/+30.4400+130.1664/+30.4495+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-02T21:00:00+09:00 2026-09-03T00:00:00+09:00 降灰 70 +30.4712+130.1400/+30.4744+130.1600/+30.4780+130.1800/+30.4793+130.2000/+30.4779+130.2200/+30.4600+130.2379/+30.4400+130.2397/+30.4203+130.2200/+30.4200+130.2171/+30.4029+130.2000/+30.4003+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4002+130.1200/+30.4001+130.1000/+30.4000+130.0970/+30.3874+130.0800/+30.3834+130.0600/+30.3821+130.0400/+30.3816+130.0200/+30.3812+130.0000/+30.3806+129.9800/+30.3801+129.9600/+30.3800+129.9581/+30.3730+129.9400/+30.3695+129.9200/+30.3631+129.9000/+30.3625+129.8800/+30.3617+129.8600/+30.3605+129.8400/+30.3600+129.8229/+30.3595+129.8200/+30.3480+129.8000/+30.3456+129.7800/+30.3435+129.7600/+30.3442+129.7400/+30.3449+129.7200/+30.3453+129.7000/+30.3471+129.6800/+30.3493+129.6600/+30.3509+129.6400/+30.3516+129.6200/+30.3525+129.6000/+30.3532+129.5800/+30.3539+129.5600/+30.3551+129.5400/+30.3569+129.5200/+30.3594+129.5000/+30.3600+129.4945/+30.3665+129.4800/+30.3800+129.4667/+30.3960+129.4600/+30.4000+129.4590/+30.4003+129.4600/+30.4057+129.4800/+30.4103+129.5000/+30.4168+129.5200/+30.4200+129.5320/+30.4219+129.5400/+30.4244+129.5600/+30.4250+129.5800/+30.4255+129.6000/+30.4296+129.6200/+30.4328+129.6400/+30.4359+129.6600/+30.4386+129.6800/+30.4379+129.7000/+30.4400+129.7180/+30.4406+129.7200/+30.4436+129.7400/+30.4462+129.7600/+30.4482+129.7800/+30.4516+129.8000/+30.4510+129.8200/+30.4532+129.8400/+30.4547+129.8600/+30.4568+129.8800/+30.4580+129.9000/+30.4516+129.9200/+30.4521+129.9400/+30.4542+129.9600/+30.4559+129.9800/+30.4570+130.0000/+30.4579+130.0200/+30.4589+130.0400/+30.4594+130.0600/+30.4596+130.0800/+30.4598+130.1000/+30.4599+130.1200/+30.4600+130.1288/+30.4712+130.1400/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4685+130.1800/+30.4700+130.2000/+30.4600+130.2100/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4291+130.1800/+30.4400+130.1627/+30.4600+130.1714/+30.4685+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-09-03T00:00:00+09:00 2026-09-03T03:00:00+09:00 降灰 70 +30.4621+129.6800/+30.4618+129.7000/+30.4627+129.7200/+30.4635+129.7400/+30.4642+129.7600/+30.4659+129.7800/+30.4671+129.8000/+30.4662+129.8200/+30.4678+129.8400/+30.4688+129.8600/+30.4705+129.8800/+30.4716+129.9000/+30.4670+129.9200/+30.4663+129.9400/+30.4655+129.9600/+30.4643+129.9800/+30.4645+130.0000/+30.4654+130.0200/+30.4667+130.0400/+30.4641+130.0600/+30.4689+130.0800/+30.4696+130.1000/+30.4710+130.1200/+30.4749+130.1400/+30.4777+130.1600/+30.4792+130.1800/+30.4795+130.2000/+30.4777+130.2200/+30.4600+130.2377/+30.4400+130.2396/+30.4204+130.2200/+30.4200+130.2170/+30.4030+130.2000/+30.4004+130.1800/+30.4002+130.1600/+30.4002+130.1400/+30.4002+130.1200/+30.4000+130.1068/+30.3937+130.1000/+30.3838+130.0800/+30.3821+130.0600/+30.3815+130.0400/+30.3811+130.0200/+30.3804+130.0000/+30.3800+129.9925/+30.3729+129.9800/+30.3685+129.9600/+30.3658+129.9400/+30.3649+129.9200/+30.3615+129.9000/+30.3607+129.8800/+30.3600+129.8645/+30.3589+129.8600/+30.3536+129.8400/+30.3508+129.8200/+30.3450+129.8000/+30.3463+129.7800/+30.3477+129.7600/+30.3475+129.7400/+30.3472+129.7200/+30.3464+129.7000/+30.3498+129.6800/+30.3539+129.6600/+30.3588+129.6400/+30.3600+129.6353/+30.3646+129.6200/+30.3733+129.6000/+30.3800+129.5840/+30.3818+129.5800/+30.3926+129.5600/+30.4000+129.5432/+30.4136+129.5600/+30.4200+129.5664/+30.4313+129.5800/+30.4400+129.5930/+30.4426+129.6000/+30.4496+129.6200/+30.4548+129.6400/+30.4589+129.6600/+30.4600+129.6660/+30.4621+129.6800/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4690+130.1800/+30.4750+130.2000/+30.4600+130.2150/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4212+130.2000/+30.4278+130.1800/+30.4400+130.1623/+30.4600+130.1641/+30.4690+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、２日０９時から１２時までは火口から西方向、２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。 　２日９時から３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 　０２日０９時から１２時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０２日１２時から１５時まで　西　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０２日１５時から１８時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０２日１８時から２１時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０２日２１時から２４時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０３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。