2026-09-25T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-26T02:00:00+09:00 2026-09-26T03:00:00+09:00 2026-09-26T21:00:00+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 2026-09-26T03:00:00+09:00 2026-09-26T06:00:00+09:00 降灰 70 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北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4763+130.2200/+30.4600+130.2383/+30.4400+130.2388/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2044/+30.4763+130.2200/ 北 2 鹿児島県屋久島町 4650500 2026-09-26T06:00:00+09:00 2026-09-26T09:00:00+09:00 降灰 70 +30.8101+130.5200/+30.8116+130.5400/+30.8134+130.5600/+30.8053+130.5800/+30.8000+130.5864/+30.7893+130.5800/+30.7800+130.5771/+30.7600+130.5733/+30.7452+130.5600/+30.7400+130.5573/+30.7200+130.5476/+30.7108+130.5400/+30.7000+130.5292/+30.6933+130.5200/+30.6800+130.5091/+30.6689+130.5000/+30.6600+130.4921/+30.6500+130.4800/+30.6400+130.4669/+30.6348+130.4600/+30.6200+130.4474/+30.6156+130.4400/+30.6034+130.4200/+30.6000+130.4166/+30.5843+130.4000/+30.5800+130.3960/+30.5650+130.3800/+30.5600+130.3748/+30.5464+130.3600/+30.5400+130.3547/+30.5258+130.3400/+30.5200+130.3346/+30.5058+130.3200/+30.5000+130.3155/+30.4846+130.3000/+30.4800+130.2973/+30.4627+130.2800/+30.4600+130.2788/+30.4412+130.2600/+30.4400+130.2597/+30.4203+130.2400/+30.4201+130.2200/+30.4308+130.2000/+30.4400+130.1908/+30.4553+130.2000/+30.4600+130.2000/+30.4800+130.2005/+30.4995+130.2200/+30.5000+130.2205/+30.5197+130.2400/+30.5200+130.2403/+30.5400+130.2510/+30.5491+130.2600/+30.5600+130.2656/+30.5747+130.2800/+30.5800+130.2840/+30.5968+130.3000/+30.6000+130.3025/+30.6182+130.3200/+30.6200+130.3219/+30.6400+130.3372/+30.6430+130.3400/+30.6600+130.3528/+30.6686+130.3600/+30.6800+130.3664/+30.7000+130.3789/+30.7012+130.3800/+30.7167+130.4000/+30.7200+130.4051/+30.7383+130.4200/+30.7400+130.4224/+30.7530+130.4400/+30.7600+130.4502/+30.7720+130.4600/+30.7800+130.4691/+30.7871+130.4800/+30.7962+130.5000/+30.8000+130.5055/+30.8101+130.5200/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4766+130.2200/+30.4724+130.2400/+30.4600+130.2512/+30.4496+130.2400/+30.4400+130.2388/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2034/+30.4766+130.2200/ 北東 3 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 +30.7238+130.6400/+30.7267+130.6600/+30.7274+130.6800/+30.7291+130.7000/+30.7200+130.7181/+30.7176+130.7200/+30.7000+130.7265/+30.6956+130.7200/+30.6843+130.7000/+30.6800+130.6921/+30.6725+130.6800/+30.6600+130.6680/+30.6549+130.6600/+30.6434+130.6400/+30.6400+130.6359/+30.6280+130.6200/+30.6200+130.6029/+30.6189+130.6000/+30.6112+130.5800/+30.6000+130.5659/+30.5939+130.5600/+30.5809+130.5400/+30.5800+130.5382/+30.5695+130.5200/+30.5600+130.5079/+30.5549+130.5000/+30.5519+130.4800/+30.5434+130.4600/+30.5400+130.4532/+30.5298+130.4400/+30.5222+130.4200/+30.5200+130.4152/+30.5066+130.4000/+30.5007+130.3800/+30.5000+130.3786/+30.4835+130.3600/+30.4800+130.3406/+30.4794+130.3400/+30.4616+130.3200/+30.4600+130.3087/+30.4513+130.3000/+30.4405+130.2800/+30.4400+130.2766/+30.4234+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+130.2417/+30.5183+130.2600/+30.5200+130.2671/+30.5329+130.2800/+30.5399+130.3000/+30.5400+130.3002/+30.5582+130.3200/+30.5600+130.3241/+30.5753+130.3400/+30.5800+130.3540/+30.5858+130.3600/+30.5992+130.3800/+30.6000+130.3822/+30.6138+130.4000/+30.6200+130.4141/+30.6249+130.4200/+30.6400+130.4359/+30.6445+130.4400/+30.6526+130.4600/+30.6585+130.4800/+30.6600+130.4839/+30.6702+130.5000/+30.6784+130.5200/+30.6800+130.5291/+30.6843+130.5400/+30.6926+130.5600/+30.7000+130.5783/+30.7006+130.5800/+30.7075+130.6000/+30.7139+130.6200/+30.7200+130.6328/+30.7238+130.6400/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4743+130.2200/+30.4721+130.2400/+30.4600+130.2525/+30.4400+130.2507/+30.4293+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2057/+30.4743+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 +30.6601+130.6600/+30.6629+130.6800/+30.6639+130.7000/+30.6623+130.7200/+30.6604+130.7400/+30.6600+130.7452/+30.6571+130.7600/+30.6533+130.7800/+30.6482+130.8000/+30.6400+130.8128/+30.6291+130.8000/+30.6200+130.7871/+30.6135+130.7800/+30.6000+130.7688/+30.5979+130.7600/+30.5920+130.7400/+30.5861+130.7200/+30.5834+130.7000/+30.5800+130.6823/+30.5796+130.6800/+30.5755+130.6600/+30.5723+130.6400/+30.5687+130.6200/+30.5641+130.6000/+30.5600+130.5862/+30.5581+130.5800/+30.5499+130.5600/+30.5454+130.5400/+30.5419+130.5200/+30.5400+130.5077/+30.5374+130.5000/+30.5266+130.4800/+30.5213+130.4600/+30.5200+130.4559/+30.5090+130.4400/+30.5026+130.4200/+30.5000+130.4098/+30.4918+130.4000/+30.4829+130.3800/+30.4800+130.3638/+30.4764+130.3600/+30.4625+130.3400/+30.4602+130.3200/+30.4600+130.3195/+30.4418+130.3000/+30.4402+130.2800/+30.4400+130.2791/+30.4210+130.2600/+30.4201+130.2400/+30.4201+130.2200/+30.4400+130.2000/+30.4600+130.2001/+30.4799+130.2200/+30.4800+130.2213/+30.4987+130.2400/+30.4999+130.2600/+30.5000+130.2609/+30.5187+130.2800/+30.5200+130.2923/+30.5276+130.3000/+30.5386+130.3200/+30.5400+130.3268/+30.5526+130.3400/+30.5584+130.3600/+30.5600+130.3667/+30.5719+130.3800/+30.5781+130.4000/+30.5800+130.4075/+30.5902+130.4200/+30.5974+130.4400/+30.6000+130.4515/+30.6104+130.4600/+30.6200+130.4774/+30.6211+130.4800/+30.6273+130.5000/+30.6319+130.5200/+30.6380+130.5400/+30.6400+130.5492/+30.6450+130.5600/+30.6487+130.5800/+30.6539+130.6000/+30.6565+130.6200/+30.6591+130.6400/+30.6600+130.6584/+30.6601+130.6600/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4740+130.2200/+30.4723+130.2400/+30.4600+130.2544/+30.4400+130.2534/+30.4266+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2060/+30.4740+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 +30.6231+130.6000/+30.6247+130.6200/+30.6262+130.6400/+30.6280+130.6600/+30.6303+130.6800/+30.6317+130.7000/+30.6288+130.7200/+30.6245+130.7400/+30.6200+130.7592/+30.6198+130.7600/+30.6150+130.7800/+30.6084+130.8000/+30.6000+130.8155/+30.5936+130.8000/+30.5875+130.7800/+30.5824+130.7600/+30.5800+130.7522/+30.5767+130.7400/+30.5702+130.7200/+30.5652+130.7000/+30.5628+130.6800/+30.5600+130.6745/+30.5517+130.6600/+30.5446+130.6400/+30.5400+130.6277/+30.5377+130.6200/+30.5400+130.6141/+30.5426+130.6000/+30.5400+130.5835/+30.5384+130.5800/+30.5260+130.5600/+30.5201+130.5400/+30.5200+130.5394/+30.5142+130.5200/+30.5200+130.5083/+30.5209+130.5000/+30.5200+130.4943/+30.5115+130.4800/+30.5031+130.4600/+30.5001+130.4400/+30.5000+130.4394/+30.4856+130.4200/+30.4817+130.4000/+30.4800+130.3889/+30.4719+130.3800/+30.4622+130.3600/+30.4604+130.3400/+30.4600+130.3374/+30.4437+130.3200/+30.4405+130.3000/+30.4400+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+130.2404/+30.4993+130.2600/+30.4998+130.2800/+30.5000+130.2834/+30.5160+130.3000/+30.5192+130.3200/+30.5200+130.3303/+30.5293+130.3400/+30.5377+130.3600/+30.5397+130.3800/+30.5400+130.3822/+30.5539+130.4000/+30.5584+130.4200/+30.5600+130.4302/+30.5670+130.4400/+30.5749+130.4600/+30.5786+130.4800/+30.5800+130.4832/+30.5941+130.5000/+30.5963+130.5200/+30.5986+130.5400/+30.6000+130.5489/+30.6063+130.5600/+30.6137+130.5800/+30.6200+130.5936/+30.6231+130.6000/ 東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4658+130.2400/+30.4600+130.2475/+30.4400+130.2531/+30.4269+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4593+130.2200/+30.4600+130.2321/+30.4658+130.2400/ 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 +30.5807+130.5000/+30.5867+130.5200/+30.5896+130.5400/+30.5910+130.5600/+30.5914+130.5800/+30.5920+130.6000/+30.5928+130.6200/+30.5951+130.6400/+30.5940+130.6600/+30.5925+130.6800/+30.5921+130.7000/+30.5800+130.7175/+30.5786+130.7200/+30.5611+130.7400/+30.5600+130.7412/+30.5589+130.7400/+30.5420+130.7200/+30.5400+130.7089/+30.5386+130.7000/+30.5362+130.6800/+30.5298+130.6600/+30.5236+130.6400/+30.5200+130.6264/+30.5185+130.6200/+30.5138+130.6000/+30.5092+130.5800/+30.5060+130.5600/+30.5012+130.5400/+30.5030+130.5200/+30.5000+130.5024/+30.4990+130.5000/+30.4921+130.4800/+30.4845+130.4600/+30.4810+130.4400/+30.4800+130.4348/+30.4708+130.4200/+30.4638+130.4000/+30.4609+130.3800/+30.4600+130.3738/+30.4497+130.3600/+30.4429+130.3400/+30.4408+130.3200/+30.4401+130.3000/+30.4400+130.2992/+30.4222+130.2800/+30.4202+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+130.2418/+30.4981+130.2600/+30.4996+130.2800/+30.5000+130.2929/+30.5069+130.3000/+30.5180+130.3200/+30.5195+130.3400/+30.5200+130.3444/+30.5331+130.3600/+30.5379+130.3800/+30.5400+130.3971/+30.5422+130.4000/+30.5544+130.4200/+30.5580+130.4400/+30.5600+130.4510/+30.5656+130.4600/+30.5709+130.4800/+30.5800+130.4991/+30.5807+130.5000/ 東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4524+130.2400/+30.4400+130.2492/+30.4322+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 東 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、２６日０９時から１２時までは火口から北東方向に降灰が予想されます。 　２６日３時から２６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 　２６日０３時から０６時まで　北東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２６日０６時から０９時まで　北東　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　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　東　　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２６日１８時から２１時まで　東　　　　　　　５０ｋｍ　　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。