2026-09-25T20:00:00Z 通常 気象庁本庁 気象庁 2026-09-26T05:00:00+09:00 2026-09-26T06:00:00+09:00 2026-09-27T00:00:00+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 2026-09-26T06:00:00+09:00 2026-09-26T09:00:00+09:00 降灰 70 +30.8106+130.5200/+30.8085+130.5400/+30.8035+130.5600/+30.8000+130.5632/+30.7808+130.5600/+30.7800+130.5599/+30.7600+130.5531/+30.7400+130.5415/+30.7370+130.5400/+30.7200+130.5323/+30.7048+130.5200/+30.7000+130.5173/+30.6800+130.5047/+30.6741+130.5000/+30.6600+130.4909/+30.6490+130.4800/+30.6400+130.4706/+30.6309+130.4600/+30.6200+130.4489/+30.6146+130.4400/+30.6000+130.4203/+30.5998+130.4200/+30.5827+130.4000/+30.5800+130.3969/+30.5646+130.3800/+30.5600+130.3749/+30.5460+130.3600/+30.5400+130.3530/+30.5274+130.3400/+30.5200+130.3328/+30.5075+130.3200/+30.5000+130.3131/+30.4872+130.3000/+30.4800+130.2947/+30.4653+130.2800/+30.4600+130.2779/+30.4421+130.2600/+30.4400+130.2597/+30.4203+130.2400/+30.4200+130.2200/+30.4259+130.2000/+30.4400+130.1859/+30.4600+130.1949/+30.4651+130.2000/+30.4800+130.2005/+30.4995+130.2200/+30.5000+130.2205/+30.5199+130.2400/+30.5200+130.2401/+30.5400+130.2474/+30.5529+130.2600/+30.5600+130.2637/+30.5771+130.2800/+30.5800+130.2826/+30.5986+130.3000/+30.6000+130.3013/+30.6200+130.3195/+30.6205+130.3200/+30.6398+130.3400/+30.6400+130.3402/+30.6600+130.3533/+30.6676+130.3600/+30.6800+130.3686/+30.6972+130.3800/+30.7000+130.3833/+30.7136+130.4000/+30.7200+130.4100/+30.7319+130.4200/+30.7400+130.4309/+30.7477+130.4400/+30.7600+130.4583/+30.7620+130.4600/+30.7800+130.4780/+30.7817+130.4800/+30.7950+130.5000/+30.8000+130.5047/+30.8106+130.5200/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4755+130.2200/+30.4718+130.2400/+30.4600+130.2515/+30.4400+130.2472/+30.4328+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2047/+30.4755+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 +30.7423+130.6800/+30.7481+130.7000/+30.7434+130.7200/+30.7400+130.7299/+30.7200+130.7349/+30.7000+130.7364/+30.6899+130.7200/+30.6810+130.7000/+30.6800+130.6970/+30.6746+130.6800/+30.6641+130.6600/+30.6600+130.6452/+30.6587+130.6400/+30.6488+130.6200/+30.6421+130.6000/+30.6400+130.5961/+30.6317+130.5800/+30.6228+130.5600/+30.6200+130.5548/+30.6126+130.5400/+30.6064+130.5200/+30.6000+130.5083/+30.5908+130.5000/+30.5851+130.4800/+30.5800+130.4642/+30.5763+130.4600/+30.5632+130.4400/+30.5600+130.4340/+30.5482+130.4200/+30.5400+130.4025/+30.5376+130.4000/+30.5227+130.3800/+30.5200+130.3755/+30.5054+130.3600/+30.5000+130.3458/+30.4942+130.3400/+30.4810+130.3200/+30.4800+130.3186/+30.4618+130.3000/+30.4600+130.2954/+30.4446+130.2800/+30.4401+130.2600/+30.4400+130.2599/+30.4201+130.2400/+30.4201+130.2200/+30.4400+130.2000/+30.4600+130.2000/+30.4800+130.2097/+30.4903+130.2200/+30.5000+130.2400/+30.5000+130.2401/+30.5198+130.2600/+30.5200+130.2606/+30.5392+130.2800/+30.5400+130.2818/+30.5578+130.3000/+30.5600+130.3047/+30.5739+130.3200/+30.5800+130.3341/+30.5855+130.3400/+30.5989+130.3600/+30.6000+130.3628/+30.6149+130.3800/+30.6200+130.3889/+30.6294+130.4000/+30.6387+130.4200/+30.6400+130.4217/+30.6572+130.4400/+30.6600+130.4499/+30.6683+130.4600/+30.6800+130.4776/+30.6815+130.4800/+30.6907+130.5000/+30.7000+130.5153/+30.7033+130.5200/+30.7099+130.5400/+30.7147+130.5600/+30.7200+130.5771/+30.7224+130.5800/+30.7340+130.6000/+30.7353+130.6200/+30.7362+130.6400/+30.7383+130.6600/+30.7400+130.6697/+30.7423+130.6800/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4737+130.2200/+30.4717+130.2400/+30.4600+130.2522/+30.4400+130.2532/+30.4268+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2063/+30.4737+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 +30.6803+130.6600/+30.6800+130.6623/+30.6766+130.6800/+30.6736+130.7000/+30.6720+130.7200/+30.6694+130.7400/+30.6622+130.7600/+30.6600+130.7635/+30.6561+130.7600/+30.6400+130.7453/+30.6385+130.7400/+30.6339+130.7200/+30.6297+130.7000/+30.6200+130.6862/+30.6170+130.6800/+30.6077+130.6600/+30.6000+130.6425/+30.5989+130.6400/+30.5900+130.6200/+30.5865+130.6000/+30.5800+130.5800/+30.5720+130.5600/+30.5624+130.5400/+30.5600+130.5356/+30.5533+130.5200/+30.5491+130.5000/+30.5449+130.4800/+30.5400+130.4620/+30.5387+130.4600/+30.5264+130.4400/+30.5207+130.4200/+30.5200+130.4186/+30.5048+130.4000/+30.5002+130.3800/+30.5000+130.3796/+30.4835+130.3600/+30.4800+130.3409/+30.4791+130.3400/+30.4617+130.3200/+30.4600+130.3072/+30.4528+130.3000/+30.4406+130.2800/+30.4400+130.2765/+30.4235+130.2600/+30.4201+130.2400/+30.4201+130.2200/+30.4400+130.2000/+30.4600+130.2000/+30.4800+130.2200/+30.4800+130.2203/+30.4996+130.2400/+30.5000+130.2427/+30.5173+130.2600/+30.5200+130.2741/+30.5259+130.2800/+30.5390+130.3000/+30.5400+130.3029/+30.5563+130.3200/+30.5600+130.3308/+30.5688+130.3400/+30.5781+130.3600/+30.5800+130.3650/+30.5933+130.3800/+30.6000+130.3984/+30.6014+130.4000/+30.6132+130.4200/+30.6192+130.4400/+30.6200+130.4422/+30.6362+130.4600/+30.6400+130.4712/+30.6444+130.4800/+30.6495+130.5000/+30.6528+130.5200/+30.6570+130.5400/+30.6600+130.5476/+30.6663+130.5600/+30.6693+130.5800/+30.6726+130.6000/+30.6750+130.6200/+30.6789+130.6400/+30.6800+130.6557/+30.6803+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/+30.4736+130.2400/+30.4600+130.2548/+30.4400+130.2516/+30.4284+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 +30.6431+130.6600/+30.6476+130.6800/+30.6435+130.7000/+30.6406+130.7200/+30.6400+130.7236/+30.6350+130.7400/+30.6212+130.7600/+30.6200+130.7611/+30.6000+130.7767/+30.5926+130.7600/+30.5858+130.7400/+30.5804+130.7200/+30.5800+130.7180/+30.5771+130.7000/+30.5738+130.6800/+30.5689+130.6600/+30.5652+130.6400/+30.5600+130.6254/+30.5572+130.6200/+30.5521+130.6000/+30.5473+130.5800/+30.5441+130.5600/+30.5401+130.5400/+30.5400+130.5397/+30.5276+130.5200/+30.5255+130.5000/+30.5215+130.4800/+30.5200+130.4722/+30.5133+130.4600/+30.5052+130.4400/+30.5006+130.4200/+30.5000+130.4176/+30.4865+130.4000/+30.4814+130.3800/+30.4800+130.3719/+30.4694+130.3600/+30.4615+130.3400/+30.4600+130.3239/+30.4563+130.3200/+30.4411+130.3000/+30.4401+130.2800/+30.4400+130.2795/+30.4206+130.2600/+30.4200+130.2400/+30.4200+130.2200/+30.4400+130.2000/+30.4600+130.2001/+30.4799+130.2200/+30.4800+130.2268/+30.4932+130.2400/+30.4997+130.2600/+30.5000+130.2688/+30.5111+130.2800/+30.5190+130.3000/+30.5200+130.3122/+30.5274+130.3200/+30.5378+130.3400/+30.5400+130.3599/+30.5401+130.3600/+30.5562+130.3800/+30.5598+130.4000/+30.5600+130.4015/+30.5731+130.4200/+30.5784+130.4400/+30.5800+130.4522/+30.5841+130.4600/+30.5962+130.4800/+30.6000+130.4946/+30.6041+130.5000/+30.6143+130.5200/+30.6191+130.5400/+30.6200+130.5449/+30.6245+130.5600/+30.6293+130.5800/+30.6335+130.6000/+30.6355+130.6200/+30.6388+130.6400/+30.6400+130.6464/+30.6431+130.6600/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4696+130.2400/+30.4600+130.2516/+30.4400+130.2527/+30.4273+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4599+130.2200/+30.4600+130.2209/+30.4696+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 +30.6262+130.6000/+30.6252+130.6200/+30.6236+130.6400/+30.6220+130.6600/+30.6200+130.6781/+30.6198+130.6800/+30.6134+130.7000/+30.6028+130.7200/+30.6000+130.7249/+30.5976+130.7200/+30.5854+130.7000/+30.5800+130.6820/+30.5795+130.6800/+30.5722+130.6600/+30.5641+130.6400/+30.5600+130.6364/+30.5486+130.6200/+30.5468+130.6000/+30.5430+130.5800/+30.5400+130.5720/+30.5324+130.5600/+30.5243+130.5400/+30.5200+130.5232/+30.5190+130.5200/+30.5200+130.5165/+30.5214+130.5000/+30.5200+130.4957/+30.5098+130.4800/+30.5052+130.4600/+30.5015+130.4400/+30.5000+130.4348/+30.4880+130.4200/+30.4821+130.4000/+30.4800+130.3869/+30.4741+130.3800/+30.4627+130.3600/+30.4605+130.3400/+30.4600+130.3375/+30.4439+130.3200/+30.4405+130.3000/+30.4400+130.2821/+30.4379+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+130.2406/+30.4992+130.2600/+30.4998+130.2800/+30.5000+130.2836/+30.5159+130.3000/+30.5193+130.3200/+30.5200+130.3283/+30.5310+130.3400/+30.5381+130.3600/+30.5400+130.3755/+30.5441+130.3800/+30.5566+130.4000/+30.5600+130.4198/+30.5601+130.4200/+30.5742+130.4400/+30.5782+130.4600/+30.5800+130.4692/+30.5882+130.4800/+30.5963+130.5000/+30.5983+130.5200/+30.6000+130.5275/+30.6087+130.5400/+30.6157+130.5600/+30.6197+130.5800/+30.6200+130.5812/+30.6262+130.6000/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4628+130.2200/+30.4600+130.2349/+30.4588+130.2400/+30.4400+130.2500/+30.4309+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2172/+30.4628+130.2200/ 東 2 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 +30.6018+130.5600/+30.6063+130.5800/+30.6142+130.6000/+30.6154+130.6200/+30.6165+130.6400/+30.6130+130.6600/+30.6082+130.6800/+30.6079+130.7000/+30.6015+130.7200/+30.6000+130.7265/+30.5973+130.7200/+30.5800+130.7039/+30.5746+130.7000/+30.5632+130.6800/+30.5600+130.6786/+30.5516+130.6600/+30.5453+130.6400/+30.5400+130.6200/+30.5400+130.6195/+30.5387+130.6000/+30.5314+130.5800/+30.5241+130.5600/+30.5200+130.5444/+30.5184+130.5400/+30.5131+130.5200/+30.5129+130.5000/+30.5061+130.4800/+30.5023+130.4600/+30.5000+130.4487/+30.4938+130.4400/+30.4840+130.4200/+30.4809+130.4000/+30.4800+130.3959/+30.4675+130.3800/+30.4618+130.3600/+30.4601+130.3400/+30.4600+130.3397/+30.4428+130.3200/+30.4405+130.3000/+30.4400+130.2880/+30.4321+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/+30.4993+130.2600/+30.4999+130.2800/+30.5000+130.2816/+30.5169+130.3000/+30.5194+130.3200/+30.5200+130.3258/+30.5320+130.3400/+30.5381+130.3600/+30.5400+130.3726/+30.5463+130.3800/+30.5559+130.4000/+30.5592+130.4200/+30.5600+130.4239/+30.5704+130.4400/+30.5763+130.4600/+30.5798+130.4800/+30.5800+130.4806/+30.5935+130.5000/+30.5960+130.5200/+30.5983+130.5400/+30.6000+130.5549/+30.6018+130.5600/ 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/+30.4520+130.2400/+30.4400+130.2451/+30.4349+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 　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時までは火口から東方向に降灰が予想されます。 　２６日６時から２６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 　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　北東　　　　　　６０ｋｍ　　３ｋｍ　　　　　 　２６日１８時から２１時まで　北東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２６日２１時から２４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。