2026-09-26T05:00:00Z 通常 気象庁本庁 気象庁 2026-09-26T14:00:00+09:00 2026-09-26T15:00:00+09:00 2026-09-27T09:00:00+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 2026-09-26T15:00:00+09:00 2026-09-26T18:00:00+09:00 降灰 70 +30.6013+130.5800/+30.6104+130.6000/+30.6130+130.6200/+30.6153+130.6400/+30.6138+130.6600/+30.6119+130.6800/+30.6111+130.7000/+30.6080+130.7200/+30.6069+130.7400/+30.6042+130.7600/+30.6000+130.7765/+30.5910+130.7600/+30.5834+130.7400/+30.5800+130.7293/+30.5631+130.7200/+30.5600+130.7196/+30.5518+130.7000/+30.5460+130.6800/+30.5400+130.6601/+30.5400+130.6600/+30.5360+130.6400/+30.5315+130.6200/+30.5285+130.6000/+30.5219+130.5800/+30.5200+130.5740/+30.5144+130.5600/+30.5084+130.5400/+30.5078+130.5200/+30.5052+130.5000/+30.5012+130.4800/+30.5000+130.4745/+30.4917+130.4600/+30.4864+130.4400/+30.4814+130.4200/+30.4800+130.4136/+30.4699+130.4000/+30.4629+130.3800/+30.4606+130.3600/+30.4600+130.3563/+30.4461+130.3400/+30.4412+130.3200/+30.4403+130.3000/+30.4400+130.2971/+30.4233+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+130.2401/+30.4991+130.2600/+30.4998+130.2800/+30.5000+130.2828/+30.5158+130.3000/+30.5190+130.3200/+30.5200+130.3290/+30.5297+130.3400/+30.5372+130.3600/+30.5400+130.3798/+30.5402+130.3800/+30.5526+130.4000/+30.5569+130.4200/+30.5600+130.4396/+30.5603+130.4400/+30.5707+130.4600/+30.5758+130.4800/+30.5800+130.4898/+30.5889+130.5000/+30.5926+130.5200/+30.5945+130.5400/+30.5968+130.5600/+30.6000+130.5778/+30.6013+130.5800/ 東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4746+130.2200/+30.4741+130.2400/+30.4600+130.2553/+30.4400+130.2547/+30.4258+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 2026-09-26T18:00:00+09:00 2026-09-26T21:00:00+09:00 降灰 70 +30.6099+130.6000/+30.6119+130.6200/+30.6139+130.6400/+30.6133+130.6600/+30.6126+130.6800/+30.6135+130.7000/+30.6099+130.7200/+30.6063+130.7400/+30.6023+130.7600/+30.6000+130.7730/+30.5963+130.7600/+30.5877+130.7400/+30.5800+130.7274/+30.5600+130.7264/+30.5554+130.7200/+30.5507+130.7000/+30.5470+130.6800/+30.5421+130.6600/+30.5400+130.6491/+30.5385+130.6400/+30.5326+130.6200/+30.5280+130.6000/+30.5229+130.5800/+30.5200+130.5614/+30.5197+130.5600/+30.5137+130.5400/+30.5107+130.5200/+30.5100+130.5000/+30.5039+130.4800/+30.5010+130.4600/+30.5000+130.4552/+30.4895+130.4400/+30.4834+130.4200/+30.4805+130.4000/+30.4800+130.3979/+30.4653+130.3800/+30.4613+130.3600/+30.4600+130.3472/+30.4536+130.3400/+30.4419+130.3200/+30.4404+130.3000/+30.4400+130.2936/+30.4266+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+130.2413/+30.4985+130.2600/+30.4997+130.2800/+30.5000+130.2895/+30.5103+130.3000/+30.5184+130.3200/+30.5199+130.3400/+30.5200+130.3408/+30.5359+130.3600/+30.5388+130.3800/+30.5400+130.3870/+30.5509+130.4000/+30.5565+130.4200/+30.5600+130.4375/+30.5621+130.4400/+30.5734+130.4600/+30.5763+130.4800/+30.5800+130.4897/+30.5887+130.5000/+30.5919+130.5200/+30.5942+130.5400/+30.5966+130.5600/+30.5993+130.5800/+30.6000+130.5832/+30.6099+130.6000/ 東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4675+130.2400/+30.4600+130.2490/+30.4400+130.2540/+30.4268+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4590+130.2200/+30.4600+130.2317/+30.4675+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 +30.6442+130.5400/+30.6511+130.5600/+30.6536+130.5800/+30.6567+130.6000/+30.6553+130.6200/+30.6538+130.6400/+30.6509+130.6600/+30.6474+130.6800/+30.6400+130.6874/+30.6294+130.6800/+30.6200+130.6626/+30.6184+130.6600/+30.6044+130.6400/+30.6000+130.6363/+30.5923+130.6200/+30.5873+130.6000/+30.5804+130.5800/+30.5800+130.5787/+30.5732+130.5600/+30.5655+130.5400/+30.5600+130.5279/+30.5571+130.5200/+30.5488+130.5000/+30.5442+130.4800/+30.5400+130.4650/+30.5371+130.4600/+30.5272+130.4400/+30.5200+130.4206/+30.5195+130.4200/+30.5042+130.4000/+30.5000+130.3800/+30.5000+130.3799/+30.4837+130.3600/+30.4800+130.3471/+30.4737+130.3400/+30.4619+130.3200/+30.4600+130.3127/+30.4479+130.3000/+30.4406+130.2800/+30.4400+130.2771/+30.4230+130.2600/+30.4201+130.2400/+30.4200+130.2200/+30.4300+130.2000/+30.4400+130.1900/+30.4541+130.2000/+30.4600+130.2000/+30.4800+130.2200/+30.4800+130.2206/+30.4994+130.2400/+30.5000+130.2462/+30.5138+130.2600/+30.5196+130.2800/+30.5200+130.2816/+30.5378+130.3000/+30.5400+130.3098/+30.5496+130.3200/+30.5589+130.3400/+30.5600+130.3447/+30.5726+130.3600/+30.5790+130.3800/+30.5800+130.3836/+30.5925+130.4000/+30.5983+130.4200/+30.6000+130.4248/+30.6102+130.4400/+30.6200+130.4575/+30.6223+130.4600/+30.6299+130.4800/+30.6347+130.5000/+30.6393+130.5200/+30.6400+130.5232/+30.6442+130.5400/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4627+130.2200/+30.4600+130.2337/+30.4568+130.2400/+30.4400+130.2455/+30.4345+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2173/+30.4627+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 +30.6831+130.5800/+30.6865+130.6000/+30.6864+130.6200/+30.6863+130.6400/+30.6800+130.6584/+30.6600+130.6463/+30.6442+130.6400/+30.6400+130.6387/+30.6309+130.6200/+30.6245+130.6000/+30.6200+130.5845/+30.6190+130.5800/+30.6087+130.5600/+30.6004+130.5400/+30.6000+130.5391/+30.5889+130.5200/+30.5800+130.5048/+30.5771+130.5000/+30.5770+130.4800/+30.5651+130.4600/+30.5600+130.4436/+30.5575+130.4400/+30.5439+130.4200/+30.5400+130.4096/+30.5318+130.4000/+30.5223+130.3800/+30.5200+130.3740/+30.5074+130.3600/+30.5000+130.3400/+30.4814+130.3200/+30.4800+130.3176/+30.4628+130.3000/+30.4600+130.2929/+30.4472+130.2800/+30.4401+130.2600/+30.4400+130.2599/+30.4201+130.2400/+30.4200+130.2200/+30.4269+130.2000/+30.4400+130.1869/+30.4592+130.2000/+30.4600+130.2000/+30.4800+130.2112/+30.4888+130.2200/+30.4999+130.2400/+30.5000+130.2404/+30.5194+130.2600/+30.5200+130.2621/+30.5376+130.2800/+30.5400+130.2875/+30.5523+130.3000/+30.5598+130.3200/+30.5600+130.3206/+30.5777+130.3400/+30.5800+130.3469/+30.5920+130.3600/+30.5998+130.3800/+30.6000+130.3805/+30.6148+130.4000/+30.6200+130.4183/+30.6213+130.4200/+30.6400+130.4383/+30.6417+130.4400/+30.6501+130.4600/+30.6546+130.4800/+30.6591+130.5000/+30.6600+130.5032/+30.6698+130.5200/+30.6750+130.5400/+30.6796+130.5600/+30.6800+130.5627/+30.6831+130.5800/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4733+130.2200/+30.4681+130.2400/+30.4600+130.2480/+30.4447+130.2400/+30.4400+130.2398/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2067/+30.4733+130.2200/ 北東 3 鹿児島県屋久島町 4650500 2026-09-27T03:00:00+09:00 2026-09-27T06:00:00+09:00 降灰 70 +30.6816+130.5400/+30.6905+130.5600/+30.6937+130.5800/+30.6970+130.6000/+30.6974+130.6200/+30.6980+130.6400/+30.6922+130.6600/+30.6800+130.6641/+30.6752+130.6600/+30.6644+130.6400/+30.6600+130.6319/+30.6504+130.6200/+30.6400+130.6119/+30.6324+130.6000/+30.6200+130.5812/+30.6195+130.5800/+30.6107+130.5600/+30.6026+130.5400/+30.6000+130.5348/+30.5896+130.5200/+30.5800+130.5046/+30.5770+130.5000/+30.5729+130.4800/+30.5653+130.4600/+30.5600+130.4410/+30.5594+130.4400/+30.5449+130.4200/+30.5400+130.4028/+30.5378+130.4000/+30.5226+130.3800/+30.5200+130.3737/+30.5075+130.3600/+30.5006+130.3400/+30.5000+130.3392/+30.4819+130.3200/+30.4800+130.3162/+30.4640+130.3000/+30.4600+130.2863/+30.4537+130.2800/+30.4402+130.2600/+30.4400+130.2599/+30.4201+130.2400/+30.4200+130.2200/+30.4262+130.2000/+30.4400+130.1862/+30.4600+130.1994/+30.4606+130.2000/+30.4800+130.2096/+30.4904+130.2200/+30.4999+130.2400/+30.5000+130.2404/+30.5194+130.2600/+30.5200+130.2619/+30.5377+130.2800/+30.5400+130.2877/+30.5522+130.3000/+30.5599+130.3200/+30.5600+130.3203/+30.5780+130.3400/+30.5800+130.3454/+30.5931+130.3600/+30.5995+130.3800/+30.6000+130.3815/+30.6149+130.4000/+30.6200+130.4139/+30.6251+130.4200/+30.6400+130.4370/+30.6427+130.4400/+30.6505+130.4600/+30.6561+130.4800/+30.6600+130.4928/+30.6658+130.5000/+30.6771+130.5200/+30.6800+130.5361/+30.6816+130.5400/ 北東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4747+130.2200/+30.4695+130.2400/+30.4600+130.2495/+30.4501+130.2400/+30.4400+130.2391/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2053/+30.4747+130.2200/ 北東 3 鹿児島県屋久島町 4650500 2026-09-27T06:00:00+09:00 2026-09-27T09:00:00+09:00 降灰 70 +30.6651+130.5400/+30.6690+130.5600/+30.6665+130.5800/+30.6600+130.5952/+30.6535+130.6000/+30.6400+130.6041/+30.6371+130.6000/+30.6209+130.5800/+30.6200+130.5791/+30.6092+130.5600/+30.6000+130.5485/+30.5928+130.5400/+30.5800+130.5203/+30.5798+130.5200/+30.5683+130.5000/+30.5659+130.4800/+30.5602+130.4600/+30.5600+130.4595/+30.5471+130.4400/+30.5410+130.4200/+30.5400+130.4183/+30.5254+130.4000/+30.5200+130.3838/+30.5165+130.3800/+30.5028+130.3600/+30.5000+130.3531/+30.4884+130.3400/+30.4807+130.3200/+30.4800+130.3188/+30.4621+130.3000/+30.4600+130.2947/+30.4454+130.2800/+30.4401+130.2600/+30.4400+130.2599/+30.4201+130.2400/+30.4200+130.2200/+30.4257+130.2000/+30.4400+130.1857/+30.4600+130.1979/+30.4621+130.2000/+30.4800+130.2098/+30.4902+130.2200/+30.4999+130.2400/+30.5000+130.2403/+30.5193+130.2600/+30.5200+130.2623/+30.5368+130.2800/+30.5400+130.2899/+30.5502+130.3000/+30.5593+130.3200/+30.5600+130.3220/+30.5758+130.3400/+30.5800+130.3562/+30.5832+130.3600/+30.5966+130.3800/+30.6000+130.3890/+30.6100+130.4000/+30.6170+130.4200/+30.6200+130.4282/+30.6314+130.4400/+30.6400+130.4587/+30.6406+130.4600/+30.6494+130.4800/+30.6541+130.5000/+30.6588+130.5200/+30.6600+130.5259/+30.6651+130.5400/ 北東 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4730+130.2200/+30.4673+130.2400/+30.4600+130.2475/+30.4400+130.2427/+30.4373+130.2400/+30.4212+130.2200/+30.4400+130.2012/+30.4600+130.2070/+30.4730+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１５時から２７日９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１５時から１８時まで　東　　　　　　　５０ｋｍ　　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　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　２７日０３時から０６時まで　北東　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　２７日０６時から０９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。