2026-09-25T14:00:00Z 通常 気象庁本庁 気象庁 2026-09-25T23:00:00+09:00 2026-09-26T00:00:00+09:00 2026-09-26T18:00:00+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 鹿児島県三島村 4630300 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 鹿児島県三島村 4630300 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 2026-09-26T00:00:00+09:00 2026-09-26T03:00:00+09:00 降灰 70 +30.8024+130.3400/+30.8166+130.3600/+30.8120+130.3800/+30.8047+130.4000/+30.8000+130.4032/+30.7800+130.4003/+30.7737+130.4000/+30.7600+130.3993/+30.7400+130.3953/+30.7200+130.3936/+30.7000+130.3884/+30.6800+130.3804/+30.6796+130.3800/+30.6600+130.3671/+30.6400+130.3601/+30.6399+130.3600/+30.6200+130.3400/+30.6000+130.3330/+30.5822+130.3200/+30.5800+130.3190/+30.5600+130.3101/+30.5484+130.3000/+30.5400+130.2978/+30.5200+130.2903/+30.5090+130.2800/+30.5000+130.2787/+30.4800+130.2718/+30.4681+130.2600/+30.4600+130.2598/+30.4400+130.2584/+30.4216+130.2400/+30.4201+130.2200/+30.4207+130.2000/+30.4400+130.1807/+30.4600+130.1803/+30.4800+130.1811/+30.5000+130.1835/+30.5200+130.1877/+30.5400+130.1911/+30.5600+130.1981/+30.5691+130.2000/+30.5800+130.2002/+30.6000+130.2019/+30.6200+130.2050/+30.6400+130.2066/+30.6600+130.2153/+30.6731+130.2200/+30.6800+130.2219/+30.7000+130.2290/+30.7158+130.2400/+30.7200+130.2435/+30.7400+130.2547/+30.7479+130.2600/+30.7600+130.2725/+30.7677+130.2800/+30.7800+130.2965/+30.7823+130.3000/+30.7926+130.3200/+30.8000+130.3368/+30.8024+130.3400/ 北 40 鹿児島県三島村 4630300 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4770+130.2200/+30.4602+130.2400/+30.4600+130.2401/+30.4599+130.2400/+30.4400+130.2388/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2041/+30.4770+130.2200/ 北東 3 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 +30.8123+130.5200/+30.8129+130.5400/+30.8124+130.5600/+30.8000+130.5745/+30.7800+130.5619/+30.7772+130.5600/+30.7600+130.5529/+30.7453+130.5400/+30.7400+130.5349/+30.7261+130.5200/+30.7200+130.5167/+30.7044+130.5000/+30.7000+130.4948/+30.6871+130.4800/+30.6800+130.4718/+30.6722+130.4600/+30.6600+130.4492/+30.6481+130.4400/+30.6418+130.4200/+30.6400+130.4180/+30.6232+130.4000/+30.6200+130.3972/+30.6035+130.3800/+30.6000+130.3773/+30.5816+130.3600/+30.5800+130.3589/+30.5607+130.3400/+30.5600+130.3396/+30.5400+130.3256/+30.5344+130.3200/+30.5200+130.3141/+30.5059+130.3000/+30.5000+130.2983/+30.4815+130.2800/+30.4800+130.2797/+30.4600+130.2676/+30.4524+130.2600/+30.4400+130.2596/+30.4204+130.2400/+30.4200+130.2200/+30.4245+130.2000/+30.4400+130.1845/+30.4600+130.1905/+30.4695+130.2000/+30.4800+130.2002/+30.4999+130.2200/+30.5000+130.2201/+30.5200+130.2232/+30.5376+130.2400/+30.5400+130.2410/+30.5600+130.2532/+30.5670+130.2600/+30.5800+130.2662/+30.5953+130.2800/+30.6000+130.2832/+30.6192+130.3000/+30.6200+130.3006/+30.6400+130.3144/+30.6471+130.3200/+30.6600+130.3305/+30.6695+130.3400/+30.6800+130.3520/+30.6974+130.3600/+30.7000+130.3612/+30.7143+130.3800/+30.7200+130.3927/+30.7273+130.4000/+30.7400+130.4136/+30.7459+130.4200/+30.7573+130.4400/+30.7600+130.4451/+30.7752+130.4600/+30.7800+130.4668/+30.7871+130.4800/+30.7980+130.5000/+30.8000+130.5021/+30.8123+130.5200/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4756+130.2200/+30.4600+130.2389/+30.4400+130.2388/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2048/+30.4756+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 +30.8281+130.6000/+30.8200+130.6075/+30.8000+130.6164/+30.7842+130.6000/+30.7800+130.5921/+30.7600+130.5841/+30.7544+130.5800/+30.7400+130.5681/+30.7320+130.5600/+30.7200+130.5541/+30.7014+130.5400/+30.7000+130.5385/+30.6891+130.5200/+30.6800+130.5125/+30.6679+130.5000/+30.6600+130.4925/+30.6451+130.4800/+30.6400+130.4742/+30.6297+130.4600/+30.6218+130.4400/+30.6200+130.4380/+30.6041+130.4200/+30.6000+130.4156/+30.5853+130.4000/+30.5800+130.3949/+30.5654+130.3800/+30.5600+130.3744/+30.5459+130.3600/+30.5400+130.3542/+30.5259+130.3400/+30.5200+130.3345/+30.5056+130.3200/+30.5000+130.3160/+30.4840+130.3000/+30.4800+130.2975/+30.4625+130.2800/+30.4600+130.2790/+30.4410+130.2600/+30.4400+130.2597/+30.4202+130.2400/+30.4201+130.2200/+30.4293+130.2000/+30.4400+130.1893/+30.4573+130.2000/+30.4600+130.2000/+30.4800+130.2008/+30.4992+130.2200/+30.5000+130.2210/+30.5190+130.2400/+30.5200+130.2411/+30.5392+130.2600/+30.5400+130.2610/+30.5593+130.2800/+30.5600+130.2808/+30.5794+130.3000/+30.5800+130.3007/+30.5999+130.3200/+30.6000+130.3202/+30.6200+130.3397/+30.6203+130.3400/+30.6397+130.3600/+30.6400+130.3605/+30.6584+130.3800/+30.6600+130.3822/+30.6800+130.3878/+30.6891+130.4000/+30.7000+130.4151/+30.7046+130.4200/+30.7181+130.4400/+30.7200+130.4430/+30.7400+130.4563/+30.7437+130.4600/+30.7548+130.4800/+30.7600+130.4892/+30.7730+130.5000/+30.7800+130.5081/+30.7877+130.5200/+30.7979+130.5400/+30.8000+130.5445/+30.8088+130.5600/+30.8155+130.5800/+30.8200+130.5889/+30.8281+130.6000/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4756+130.2200/+30.4697+130.2400/+30.4600+130.2484/+30.4519+130.2400/+30.4400+130.2388/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2044/+30.4756+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 +30.7403+130.6600/+30.7442+130.6800/+30.7511+130.7000/+30.7400+130.7134/+30.7200+130.7111/+30.7000+130.7100/+30.6923+130.7000/+30.6817+130.6800/+30.6800+130.6785/+30.6633+130.6600/+30.6600+130.6549/+30.6486+130.6400/+30.6400+130.6346/+30.6275+130.6200/+30.6200+130.6061/+30.6175+130.6000/+30.6084+130.5800/+30.6000+130.5655/+30.5952+130.5600/+30.5819+130.5400/+30.5800+130.5366/+30.5698+130.5200/+30.5600+130.5066/+30.5560+130.5000/+30.5536+130.4800/+30.5440+130.4600/+30.5400+130.4507/+30.5307+130.4400/+30.5228+130.4200/+30.5200+130.4129/+30.5084+130.4000/+30.5015+130.3800/+30.5000+130.3757/+30.4856+130.3600/+30.4806+130.3400/+30.4800+130.3384/+30.4626+130.3200/+30.4601+130.3000/+30.4600+130.2997/+30.4407+130.2800/+30.4400+130.2735/+30.4265+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/+30.5182+130.2600/+30.5200+130.2660/+30.5338+130.2800/+30.5400+130.2967/+30.5433+130.3000/+30.5585+130.3200/+30.5600+130.3240/+30.5749+130.3400/+30.5800+130.3527/+30.5870+130.3600/+30.5996+130.3800/+30.6000+130.3808/+30.6144+130.4000/+30.6200+130.4197/+30.6202+130.4200/+30.6400+130.4359/+30.6447+130.4400/+30.6542+130.4600/+30.6600+130.4734/+30.6666+130.4800/+30.6775+130.5000/+30.6800+130.5060/+30.6900+130.5200/+30.6977+130.5400/+30.7000+130.5469/+30.7043+130.5600/+30.7110+130.5800/+30.7200+130.5963/+30.7225+130.6000/+30.7304+130.6200/+30.7337+130.6400/+30.7400+130.6593/+30.7403+130.6600/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4751+130.2200/+30.4703+130.2400/+30.4600+130.2507/+30.4400+130.2534/+30.4266+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2049/+30.4751+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 +30.6477+130.6400/+30.6492+130.6600/+30.6510+130.6800/+30.6485+130.7000/+30.6428+130.7200/+30.6400+130.7283/+30.6351+130.7400/+30.6256+130.7600/+30.6200+130.7714/+30.6151+130.7800/+30.6003+130.8000/+30.6000+130.8003/+30.5999+130.8000/+30.5916+130.7800/+30.5852+130.7600/+30.5800+130.7428/+30.5793+130.7400/+30.5755+130.7200/+30.5724+130.7000/+30.5698+130.6800/+30.5647+130.6600/+30.5602+130.6400/+30.5600+130.6394/+30.5529+130.6200/+30.5515+130.6000/+30.5480+130.5800/+30.5437+130.5600/+30.5400+130.5426/+30.5385+130.5400/+30.5290+130.5200/+30.5275+130.5000/+30.5226+130.4800/+30.5200+130.4717/+30.5121+130.4600/+30.5033+130.4400/+30.5001+130.4200/+30.5000+130.4196/+30.4850+130.4000/+30.4807+130.3800/+30.4800+130.3777/+30.4648+130.3600/+30.4611+130.3400/+30.4600+130.3335/+30.4472+130.3200/+30.4409+130.3000/+30.4401+130.2800/+30.4400+130.2797/+30.4206+130.2600/+30.4201+130.2400/+30.4201+130.2200/+30.4400+130.2000/+30.4600+130.2001/+30.4799+130.2200/+30.4800+130.2229/+30.4971+130.2400/+30.4998+130.2600/+30.5000+130.2633/+30.5165+130.2800/+30.5195+130.3000/+30.5200+130.3034/+30.5355+130.3200/+30.5392+130.3400/+30.5400+130.3438/+30.5543+130.3600/+30.5589+130.3800/+30.5600+130.3843/+30.5726+130.4000/+30.5780+130.4200/+30.5800+130.4294/+30.5874+130.4400/+30.5955+130.4600/+30.6000+130.4730/+30.6084+130.4800/+30.6168+130.5000/+30.6200+130.5136/+30.6222+130.5200/+30.6284+130.5400/+30.6325+130.5600/+30.6344+130.5800/+30.6358+130.6000/+30.6398+130.6200/+30.6400+130.6208/+30.6477+130.6400/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4669+130.2200/+30.4723+130.2400/+30.4600+130.2540/+30.4400+130.2531/+30.4269+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2131/+30.4669+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 +30.6254+130.6000/+30.6263+130.6200/+30.6273+130.6400/+30.6280+130.6600/+30.6288+130.6800/+30.6279+130.7000/+30.6258+130.7200/+30.6230+130.7400/+30.6200+130.7554/+30.6190+130.7600/+30.6133+130.7800/+30.6057+130.8000/+30.6000+130.8116/+30.5945+130.8000/+30.5875+130.7800/+30.5824+130.7600/+30.5800+130.7502/+30.5777+130.7400/+30.5738+130.7200/+30.5666+130.7000/+30.5609+130.6800/+30.5600+130.6773/+30.5545+130.6600/+30.5496+130.6400/+30.5426+130.6200/+30.5453+130.6000/+30.5425+130.5800/+30.5400+130.5688/+30.5350+130.5600/+30.5248+130.5400/+30.5200+130.5246/+30.5183+130.5200/+30.5200+130.5170/+30.5227+130.5000/+30.5200+130.4893/+30.5133+130.4800/+30.5052+130.4600/+30.5015+130.4400/+30.5000+130.4343/+30.4890+130.4200/+30.4823+130.4000/+30.4800+130.3807/+30.4794+130.3800/+30.4635+130.3600/+30.4606+130.3400/+30.4600+130.3365/+30.4448+130.3200/+30.4406+130.3000/+30.4400+130.2819/+30.4381+130.2800/+30.4204+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+130.2402/+30.4994+130.2600/+30.4999+130.2800/+30.5000+130.2817/+30.5175+130.3000/+30.5195+130.3200/+30.5200+130.3253/+30.5334+130.3400/+30.5385+130.3600/+30.5400+130.3710/+30.5481+130.3800/+30.5571+130.4000/+30.5600+130.4200/+30.5735+130.4400/+30.5779+130.4600/+30.5800+130.4740/+30.5846+130.4800/+30.5962+130.5000/+30.5989+130.5200/+30.6000+130.5250/+30.6102+130.5400/+30.6163+130.5600/+30.6197+130.5800/+30.6200+130.5813/+30.6254+130.6000/ 北東 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4622+130.2400/+30.4600+130.2432/+30.4400+130.2532/+30.4282+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4597+130.2200/+30.4600+130.2331/+30.4622+130.2400/ 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に降灰が予想されます。 　２６日０時から２６日１８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００時から０３時まで　北　　　　　　　４０ｋｍ　　３ｋｍ　　　　　 　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　　　　　　６０ｋｍ　　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　　　　　 　 　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、三島村 　 　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。