2026-09-25T23:00:00Z 通常 気象庁本庁 気象庁 2026-09-26T08:00:00+09:00 2026-09-26T09:00:00+09:00 2026-09-27T03:00:00+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、２６日０９時から１２時までは火口から北東方向、２６日２１時から２４時までは火口から北東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 2026-09-26T09:00:00+09:00 2026-09-26T12:00:00+09:00 降灰 70 +30.7207+130.6200/+30.7254+130.6400/+30.7254+130.6600/+30.7255+130.6800/+30.7259+130.7000/+30.7200+130.7117/+30.7135+130.7200/+30.7000+130.7302/+30.6932+130.7200/+30.6826+130.7000/+30.6800+130.6931/+30.6747+130.6800/+30.6600+130.6613/+30.6594+130.6600/+30.6532+130.6400/+30.6432+130.6200/+30.6400+130.6138/+30.6326+130.6000/+30.6265+130.5800/+30.6200+130.5635/+30.6184+130.5600/+30.6101+130.5400/+30.6050+130.5200/+30.6000+130.5027/+30.5975+130.5000/+30.5877+130.4800/+30.5819+130.4600/+30.5800+130.4552/+30.5692+130.4400/+30.5622+130.4200/+30.5600+130.4160/+30.5456+130.4000/+30.5400+130.3842/+30.5360+130.3800/+30.5217+130.3600/+30.5200+130.3576/+30.5031+130.3400/+30.5000+130.3344/+30.4859+130.3200/+30.4800+130.3041/+30.4759+130.3000/+30.4603+130.2800/+30.4600+130.2798/+30.4403+130.2600/+30.4400+130.2598/+30.4202+130.2400/+30.4201+130.2200/+30.4346+130.2000/+30.4400+130.1946/+30.4483+130.2000/+30.4600+130.2000/+30.4800+130.2017/+30.4983+130.2200/+30.5000+130.2223/+30.5178+130.2400/+30.5200+130.2430/+30.5377+130.2600/+30.5400+130.2632/+30.5570+130.2800/+30.5600+130.2844/+30.5762+130.3000/+30.5800+130.3058/+30.5926+130.3200/+30.6000+130.3400/+30.6000+130.3401/+30.6151+130.3600/+30.6200+130.3719/+30.6271+130.3800/+30.6398+130.4000/+30.6400+130.4005/+30.6527+130.4200/+30.6600+130.4360/+30.6634+130.4400/+30.6767+130.4600/+30.6800+130.4653/+30.6895+130.4800/+30.6957+130.5000/+30.7000+130.5094/+30.7060+130.5200/+30.7093+130.5400/+30.7126+130.5600/+30.7153+130.5800/+30.7191+130.6000/+30.7200+130.6138/+30.7207+130.6200/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4746+130.2200/+30.4727+130.2400/+30.4600+130.2528/+30.4400+130.2496/+30.4304+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2054/+30.4746+130.2200/ 北東 3 鹿児島県屋久島町 4650500 2026-09-26T12:00:00+09:00 2026-09-26T15:00:00+09:00 降灰 70 +30.6830+130.5800/+30.6894+130.6000/+30.6934+130.6200/+30.6973+130.6400/+30.6985+130.6600/+30.6959+130.6800/+30.6920+130.7000/+30.6858+130.7200/+30.6800+130.7310/+30.6724+130.7400/+30.6600+130.7462/+30.6559+130.7400/+30.6458+130.7200/+30.6400+130.7091/+30.6382+130.7000/+30.6292+130.6800/+30.6200+130.6635/+30.6184+130.6600/+30.6109+130.6400/+30.6031+130.6200/+30.6000+130.6123/+30.5955+130.6000/+30.5918+130.5800/+30.5839+130.5600/+30.5800+130.5509/+30.5745+130.5400/+30.5660+130.5200/+30.5600+130.5106/+30.5540+130.5000/+30.5529+130.4800/+30.5460+130.4600/+30.5400+130.4415/+30.5387+130.4400/+30.5244+130.4200/+30.5200+130.4025/+30.5178+130.4000/+30.5032+130.3800/+30.5000+130.3700/+30.4906+130.3600/+30.4814+130.3400/+30.4800+130.3358/+30.4648+130.3200/+30.4604+130.3000/+30.4600+130.2993/+30.4410+130.2800/+30.4400+130.2714/+30.4286+130.2600/+30.4201+130.2400/+30.4201+130.2200/+30.4400+130.2000/+30.4600+130.2000/+30.4800+130.2200/+30.4800+130.2202/+30.4997+130.2400/+30.5000+130.2420/+30.5180+130.2600/+30.5200+130.2692/+30.5307+130.2800/+30.5397+130.3000/+30.5400+130.3011/+30.5578+130.3200/+30.5600+130.3258/+30.5731+130.3400/+30.5800+130.3578/+30.5822+130.3600/+30.5966+130.3800/+30.6000+130.3906/+30.6084+130.4000/+30.6185+130.4200/+30.6200+130.4239/+30.6363+130.4400/+30.6400+130.4497/+30.6446+130.4600/+30.6528+130.4800/+30.6583+130.5000/+30.6600+130.5067/+30.6675+130.5200/+30.6732+130.5400/+30.6771+130.5600/+30.6800+130.5722/+30.6830+130.5800/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4752+130.2200/+30.4737+130.2400/+30.4600+130.2547/+30.4400+130.2534/+30.4266+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2048/+30.4752+130.2200/ 北東 3 鹿児島県屋久島町 4650500 2026-09-26T15:00:00+09:00 2026-09-26T18:00:00+09:00 降灰 70 +30.6419+130.6800/+30.6400+130.6886/+30.6366+130.7000/+30.6334+130.7200/+30.6288+130.7400/+30.6211+130.7600/+30.6200+130.7623/+30.6098+130.7800/+30.6000+130.7930/+30.5953+130.7800/+30.5894+130.7600/+30.5843+130.7400/+30.5800+130.7205/+30.5799+130.7200/+30.5772+130.7000/+30.5753+130.6800/+30.5723+130.6600/+30.5694+130.6400/+30.5600+130.6208/+30.5594+130.6200/+30.5522+130.6000/+30.5476+130.5800/+30.5439+130.5600/+30.5400+130.5444/+30.5371+130.5400/+30.5260+130.5200/+30.5258+130.5000/+30.5209+130.4800/+30.5200+130.4758/+30.5116+130.4600/+30.5045+130.4400/+30.5003+130.4200/+30.5000+130.4188/+30.4867+130.4000/+30.4815+130.3800/+30.4800+130.3733/+30.4682+130.3600/+30.4615+130.3400/+30.4600+130.3254/+30.4550+130.3200/+30.4413+130.3000/+30.4402+130.2800/+30.4400+130.2794/+30.4207+130.2600/+30.4200+130.2400/+30.4200+130.2200/+30.4400+130.2000/+30.4600+130.2001/+30.4799+130.2200/+30.4800+130.2261/+30.4939+130.2400/+30.4997+130.2600/+30.5000+130.2691/+30.5109+130.2800/+30.5191+130.3000/+30.5200+130.3111/+30.5288+130.3200/+30.5383+130.3400/+30.5400+130.3535/+30.5461+130.3600/+30.5572+130.3800/+30.5600+130.3958/+30.5638+130.4000/+30.5746+130.4200/+30.5788+130.4400/+30.5800+130.4468/+30.5885+130.4600/+30.5965+130.4800/+30.6000+130.4964/+30.6026+130.5000/+30.6136+130.5200/+30.6190+130.5400/+30.6200+130.5458/+30.6239+130.5600/+30.6282+130.5800/+30.6320+130.6000/+30.6326+130.6200/+30.6336+130.6400/+30.6369+130.6600/+30.6400+130.6729/+30.6419+130.6800/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4695+130.2200/+30.4706+130.2400/+30.4600+130.2524/+30.4400+130.2540/+30.4260+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2105/+30.4695+130.2200/ 北東 3 鹿児島県屋久島町 4650500 2026-09-26T18:00:00+09:00 2026-09-26T21:00:00+09:00 降灰 70 +30.6060+130.5800/+30.6136+130.6000/+30.6143+130.6200/+30.6151+130.6400/+30.6149+130.6600/+30.6147+130.6800/+30.6132+130.7000/+30.6076+130.7200/+30.6011+130.7400/+30.6000+130.7433/+30.5958+130.7400/+30.5800+130.7253/+30.5600+130.7289/+30.5549+130.7200/+30.5520+130.7000/+30.5495+130.6800/+30.5446+130.6600/+30.5409+130.6400/+30.5400+130.6363/+30.5362+130.6200/+30.5349+130.6000/+30.5282+130.5800/+30.5220+130.5600/+30.5200+130.5511/+30.5165+130.5400/+30.5126+130.5200/+30.5157+130.5000/+30.5051+130.4800/+30.5018+130.4600/+30.5000+130.4524/+30.4913+130.4400/+30.4844+130.4200/+30.4808+130.4000/+30.4800+130.3961/+30.4671+130.3800/+30.4616+130.3600/+30.4600+130.3425/+30.4577+130.3400/+30.4422+130.3200/+30.4404+130.3000/+30.4400+130.2917/+30.4284+130.2800/+30.4203+130.2600/+30.4200+130.2400/+30.4200+130.2200/+30.4400+130.2000/+30.4600+130.2001/+30.4799+130.2200/+30.4800+130.2400/+30.4800+130.2411/+30.4987+130.2600/+30.4997+130.2800/+30.5000+130.2861/+30.5135+130.3000/+30.5188+130.3200/+30.5200+130.3369/+30.5229+130.3400/+30.5368+130.3600/+30.5396+130.3800/+30.5400+130.3823/+30.5539+130.4000/+30.5582+130.4200/+30.5600+130.4327/+30.5646+130.4400/+30.5741+130.4600/+30.5775+130.4800/+30.5800+130.4860/+30.5916+130.5000/+30.5943+130.5200/+30.5967+130.5400/+30.5995+130.5600/+30.6000+130.5630/+30.6060+130.5800/ 東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4606+130.2400/+30.4600+130.2408/+30.4400+130.2505/+30.4304+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4588+130.2200/+30.4600+130.2394/+30.4606+130.2400/ 東 3 鹿児島県屋久島町 4650500 2026-09-26T21:00:00+09:00 2026-09-27T00:00:00+09:00 降灰 70 +30.6032+130.5200/+30.6106+130.5400/+30.6141+130.5600/+30.6152+130.5800/+30.6174+130.6000/+30.6148+130.6200/+30.6111+130.6400/+30.6093+130.6600/+30.6068+130.6800/+30.6000+130.6928/+30.5885+130.6800/+30.5833+130.6600/+30.5800+130.6461/+30.5786+130.6400/+30.5600+130.6205/+30.5597+130.6200/+30.5536+130.6000/+30.5491+130.5800/+30.5414+130.5600/+30.5400+130.5569/+30.5300+130.5400/+30.5230+130.5200/+30.5233+130.5000/+30.5200+130.4850/+30.5173+130.4800/+30.5066+130.4600/+30.5016+130.4400/+30.5000+130.4323/+30.4928+130.4200/+30.4841+130.4000/+30.4803+130.3800/+30.4800+130.3790/+30.4650+130.3600/+30.4611+130.3400/+30.4600+130.3331/+30.4481+130.3200/+30.4411+130.3000/+30.4401+130.2800/+30.4400+130.2796/+30.4207+130.2600/+30.4200+130.2400/+30.4200+130.2200/+30.4335+130.2000/+30.4400+130.1935/+30.4488+130.2000/+30.4600+130.2000/+30.4799+130.2200/+30.4800+130.2249/+30.4951+130.2400/+30.4997+130.2600/+30.5000+130.2664/+30.5134+130.2800/+30.5192+130.3000/+30.5200+130.3067/+30.5320+130.3200/+30.5384+130.3400/+30.5400+130.3477/+30.5509+130.3600/+30.5576+130.3800/+30.5600+130.3922/+30.5657+130.4000/+30.5748+130.4200/+30.5777+130.4400/+30.5800+130.4552/+30.5828+130.4600/+30.5947+130.4800/+30.5982+130.5000/+30.6000+130.5128/+30.6032+130.5200/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4596+130.2200/+30.4509+130.2400/+30.4400+130.2452/+30.4348+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4596+130.2200/ 東 2 鹿児島県屋久島町 4650500 2026-09-27T00:00:00+09:00 2026-09-27T03:00:00+09:00 降灰 70 +30.6228+130.4600/+30.6287+130.4800/+30.6322+130.5000/+30.6347+130.5200/+30.6373+130.5400/+30.6373+130.5600/+30.6330+130.5800/+30.6200+130.5971/+30.6113+130.6000/+30.6000+130.6055/+30.5976+130.6000/+30.5846+130.5800/+30.5800+130.5708/+30.5746+130.5600/+30.5648+130.5400/+30.5600+130.5307/+30.5559+130.5200/+30.5485+130.5000/+30.5425+130.4800/+30.5400+130.4688/+30.5365+130.4600/+30.5267+130.4400/+30.5210+130.4200/+30.5200+130.4173/+30.5072+130.4000/+30.5009+130.3800/+30.5000+130.3782/+30.4846+130.3600/+30.4800+130.3407/+30.4794+130.3400/+30.4624+130.3200/+30.4600+130.3092/+30.4512+130.3000/+30.4408+130.2800/+30.4400+130.2763/+30.4238+130.2600/+30.4201+130.2400/+30.4200+130.2200/+30.4268+130.2000/+30.4400+130.1868/+30.4584+130.2000/+30.4600+130.2000/+30.4800+130.2200/+30.4800+130.2204/+30.4995+130.2400/+30.5000+130.2443/+30.5157+130.2600/+30.5200+130.2800/+30.5200+130.2802/+30.5380+130.3000/+30.5400+130.3074/+30.5516+130.3200/+30.5593+130.3400/+30.5600+130.3423/+30.5748+130.3600/+30.5793+130.3800/+30.5800+130.3818/+30.5946+130.4000/+30.5986+130.4200/+30.6000+130.4261/+30.6084+130.4400/+30.6200+130.4573/+30.6228+130.4600/ 北東 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4705+130.2200/+30.4606+130.2400/+30.4600+130.2406/+30.4400+130.2435/+30.4365+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2095/+30.4705+130.2200/ 北東 3 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、２６日０９時から１２時までは火口から北東方向、２６日２１時から２４時までは火口から北東方向に降灰が予想されます。 　２６日９時から２７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 　２６日０９時から１２時まで　北東　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２６日１２時から１５時まで　北東　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２６日１５時から１８時まで　北東　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２６日１８時から２１時まで　東　　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　２６日２１時から２４時まで　北東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２７日００時から０３時まで　北東　　　　　　４０ｋｍ　　３ｋｍ　　　　　 　 　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。