2026-07-31T17:00:00Z 通常 気象庁本庁 気象庁 2026-08-01T02:00:00+09:00 2026-08-01T03:00:00+09:00 2026-08-01T21:00:00+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、１日０９時から１２時までは火口から南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 2026-08-01T03:00:00+09:00 2026-08-01T06:00:00+09:00 降灰 70 +30.4777+130.2200/+30.4600+130.2384/+30.4600+130.2400/+30.4596+130.2600/+30.4400+130.2796/+30.4398+130.2800/+30.4368+130.3000/+30.4200+130.3170/+30.4191+130.3200/+30.4092+130.3400/+30.4000+130.3498/+30.3963+130.3600/+30.3800+130.3767/+30.3768+130.3800/+30.3600+130.3988/+30.3585+130.4000/+30.3400+130.4183/+30.3387+130.4200/+30.3200+130.4369/+30.3000+130.4396/+30.2950+130.4400/+30.3000+130.4536/+30.3031+130.4600/+30.3000+130.4630/+30.2871+130.4800/+30.2800+130.4891/+30.2605+130.5000/+30.2600+130.5002/+30.2400+130.5067/+30.2200+130.5148/+30.2046+130.5200/+30.2000+130.5296/+30.1921+130.5400/+30.1865+130.5600/+30.1801+130.5800/+30.1800+130.5803/+30.1727+130.6000/+30.1605+130.6200/+30.1600+130.6208/+30.1400+130.6203/+30.1398+130.6200/+30.1314+130.6000/+30.1326+130.5800/+30.1352+130.5600/+30.1400+130.5454/+30.1419+130.5400/+30.1497+130.5200/+30.1600+130.5067/+30.1658+130.5000/+30.1800+130.4844/+30.1813+130.4800/+30.1863+130.4600/+30.1997+130.4400/+30.2000+130.4396/+30.2147+130.4200/+30.2200+130.4138/+30.2400+130.4043/+30.2449+130.4000/+30.2600+130.3861/+30.2679+130.3800/+30.2800+130.3688/+30.2923+130.3600/+30.3000+130.3524/+30.3117+130.3400/+30.3200+130.3318/+30.3308+130.3200/+30.3400+130.3109/+30.3459+130.3000/+30.3600+130.2858/+30.3617+130.2800/+30.3800+130.2614/+30.3802+130.2600/+30.3867+130.2400/+30.4000+130.2267/+30.4002+130.2200/+30.4200+130.2002/+30.4400+130.2000/+30.4600+130.2021/+30.4777+130.2200/ 南東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4474+130.2400/+30.4400+130.2478/+30.4291+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 2026-08-01T06:00:00+09:00 2026-08-01T09:00:00+09:00 降灰 70 +30.4775+130.2200/+30.4600+130.2376/+30.4600+130.2400/+30.4533+130.2600/+30.4400+130.2733/+30.4358+130.2800/+30.4200+130.2959/+30.4168+130.3000/+30.4000+130.3169/+30.3970+130.3200/+30.3800+130.3375/+30.3771+130.3400/+30.3600+130.3571/+30.3557+130.3600/+30.3400+130.3753/+30.3272+130.3800/+30.3200+130.3869/+30.3053+130.4000/+30.3000+130.4053/+30.2812+130.4200/+30.2800+130.4212/+30.2600+130.4386/+30.2571+130.4400/+30.2400+130.4580/+30.2371+130.4600/+30.2272+130.4800/+30.2200+130.4892/+30.2075+130.5000/+30.2000+130.5080/+30.1896+130.5200/+30.1800+130.5383/+30.1789+130.5400/+30.1600+130.5596/+30.1591+130.5600/+30.1400+130.5766/+30.1200+130.5778/+30.1015+130.5600/+30.1024+130.5400/+30.1047+130.5200/+30.1200+130.5007/+30.1205+130.5000/+30.1307+130.4800/+30.1400+130.4622/+30.1415+130.4600/+30.1600+130.4423/+30.1617+130.4400/+30.1800+130.4219/+30.1809+130.4200/+30.1973+130.4000/+30.2000+130.3963/+30.2200+130.3840/+30.2249+130.3800/+30.2400+130.3651/+30.2472+130.3600/+30.2600+130.3485/+30.2720+130.3400/+30.2800+130.3324/+30.3000+130.3209/+30.3009+130.3200/+30.3200+130.3017/+30.3220+130.3000/+30.3400+130.2823/+30.3418+130.2800/+30.3600+130.2620/+30.3613+130.2600/+30.3800+130.2413/+30.3805+130.2400/+30.4000+130.2205/+30.4001+130.2200/+30.4200+130.2001/+30.4285+130.2000/+30.4400+130.1885/+30.4526+130.2000/+30.4600+130.2020/+30.4775+130.2200/ 南東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4400+130.2400/+30.4206+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 南東 1 鹿児島県屋久島町 4650500 2026-08-01T09:00:00+09:00 2026-08-01T12:00:00+09:00 降灰 70 +30.4777+130.2200/+30.4600+130.2378/+30.4599+130.2400/+30.4400+130.2599/+30.4398+130.2600/+30.4200+130.2798/+30.4194+130.2800/+30.4000+130.2995/+30.3989+130.3000/+30.3800+130.3188/+30.3777+130.3200/+30.3600+130.3377/+30.3558+130.3400/+30.3400+130.3553/+30.3259+130.3600/+30.3200+130.3655/+30.3000+130.3788/+30.2960+130.3800/+30.2800+130.3974/+30.2783+130.4000/+30.2695+130.4200/+30.2600+130.4295/+30.2457+130.4400/+30.2400+130.4466/+30.2238+130.4600/+30.2200+130.4657/+30.2065+130.4800/+30.2000+130.4870/+30.1872+130.5000/+30.1800+130.5100/+30.1728+130.5200/+30.1641+130.5400/+30.1600+130.5477/+30.1400+130.5427/+30.1358+130.5400/+30.1266+130.5200/+30.1280+130.5000/+30.1285+130.4800/+30.1334+130.4600/+30.1397+130.4400/+30.1400+130.4395/+30.1494+130.4200/+30.1600+130.4056/+30.1629+130.4000/+30.1800+130.3816/+30.1811+130.3800/+30.1960+130.3600/+30.2000+130.3569/+30.2200+130.3474/+30.2275+130.3400/+30.2400+130.3287/+30.2514+130.3200/+30.2600+130.3125/+30.2800+130.3024/+30.2839+130.3000/+30.3000+130.2863/+30.3113+130.2800/+30.3200+130.2719/+30.3400+130.2614/+30.3424+130.2600/+30.3600+130.2432/+30.3670+130.2400/+30.3800+130.2271/+30.4000+130.2200/+30.4200+130.2001/+30.4250+130.2000/+30.4400+130.1850/+30.4564+130.2000/+30.4600+130.2016/+30.4777+130.2200/ 南東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4400+130.2399/+30.4204+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 南東 1 鹿児島県屋久島町 4650500 2026-08-01T12:00:00+09:00 2026-08-01T15:00:00+09:00 降灰 70 +30.4774+130.2200/+30.4600+130.2375/+30.4600+130.2400/+30.4495+130.2600/+30.4400+130.2695/+30.4320+130.2800/+30.4200+130.2920/+30.4105+130.3000/+30.4000+130.3105/+30.3864+130.3200/+30.3800+130.3264/+30.3600+130.3397/+30.3595+130.3400/+30.3400+130.3583/+30.3341+130.3600/+30.3200+130.3726/+30.3000+130.3787/+30.2952+130.3800/+30.2800+130.3948/+30.2758+130.4000/+30.2600+130.4162/+30.2534+130.4200/+30.2400+130.4378/+30.2384+130.4400/+30.2200+130.4574/+30.2156+130.4600/+30.2000+130.4778/+30.1978+130.4800/+30.1800+130.4976/+30.1776+130.5000/+30.1621+130.5200/+30.1600+130.5227/+30.1400+130.5367/+30.1358+130.5400/+30.1200+130.5536/+30.1000+130.5491/+30.0945+130.5400/+30.0865+130.5200/+30.0929+130.5000/+30.0965+130.4800/+30.1000+130.4744/+30.1113+130.4600/+30.1200+130.4518/+30.1261+130.4400/+30.1400+130.4224/+30.1421+130.4200/+30.1600+130.4043/+30.1647+130.4000/+30.1800+130.3864/+30.1848+130.3800/+30.2000+130.3641/+30.2200+130.3606/+30.2207+130.3600/+30.2400+130.3408/+30.2411+130.3400/+30.2600+130.3255/+30.2683+130.3200/+30.2800+130.3096/+30.3000+130.3001/+30.3002+130.3000/+30.3200+130.2827/+30.3248+130.2800/+30.3400+130.2655/+30.3548+130.2600/+30.3600+130.2549/+30.3800+130.2403/+30.3802+130.2400/+30.4000+130.2203/+30.4001+130.2200/+30.4200+130.2001/+30.4263+130.2000/+30.4400+130.1864/+30.4547+130.2000/+30.4600+130.2021/+30.4774+130.2200/ 南東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4400+130.2397/+30.4202+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 南東 1 鹿児島県屋久島町 4650500 2026-08-01T15:00:00+09:00 2026-08-01T18:00:00+09:00 降灰 70 +30.4751+130.2200/+30.4600+130.2351/+30.4599+130.2400/+30.4400+130.2599/+30.4397+130.2600/+30.4200+130.2797/+30.4190+130.2800/+30.4000+130.2989/+30.3958+130.3000/+30.3800+130.3157/+30.3649+130.3200/+30.3600+130.3248/+30.3400+130.3383/+30.3346+130.3400/+30.3200+130.3529/+30.3000+130.3588/+30.2942+130.3600/+30.2800+130.3704/+30.2600+130.3797/+30.2592+130.3800/+30.2400+130.3943/+30.2321+130.4000/+30.2200+130.4170/+30.2153+130.4200/+30.2000+130.4311/+30.1848+130.4400/+30.1800+130.4435/+30.1600+130.4576/+30.1554+130.4600/+30.1400+130.4698/+30.1200+130.4775/+30.1113+130.4800/+30.1000+130.4870/+30.0800+130.4999/+30.0680+130.5000/+30.0600+130.5001/+30.0400+130.5017/+30.0369+130.5000/+30.0399+130.4800/+30.0400+130.4786/+30.0411+130.4600/+30.0493+130.4400/+30.0600+130.4274/+30.0681+130.4200/+30.0800+130.4113/+30.0890+130.4000/+30.1000+130.3872/+30.1128+130.3800/+30.1200+130.3767/+30.1349+130.3600/+30.1400+130.3555/+30.1600+130.3435/+30.1675+130.3400/+30.1800+130.3317/+30.2000+130.3250/+30.2092+130.3200/+30.2200+130.3112/+30.2400+130.3029/+30.2464+130.3000/+30.2600+130.2891/+30.2800+130.2805/+30.2811+130.2800/+30.3000+130.2665/+30.3200+130.2612/+30.3242+130.2600/+30.3400+130.2466/+30.3600+130.2406/+30.3613+130.2400/+30.3800+130.2221/+30.3878+130.2200/+30.4000+130.2078/+30.4200+130.2000/+30.4238+130.2000/+30.4400+130.1846/+30.4560+130.2000/+30.4600+130.2042/+30.4751+130.2200/ 南東 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4400+130.2396/+30.4200+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 南東 1 鹿児島県屋久島町 4650500 2026-08-01T18:00:00+09:00 2026-08-01T21:00:00+09:00 降灰 70 +30.4734+130.2200/+30.4600+130.2334/+30.4599+130.2400/+30.4400+130.2598/+30.4350+130.2600/+30.4200+130.2750/+30.4000+130.2797/+30.3968+130.2800/+30.3800+130.2961/+30.3600+130.2993/+30.3547+130.3000/+30.3400+130.3130/+30.3200+130.3182/+30.3072+130.3200/+30.3000+130.3255/+30.2800+130.3355/+30.2646+130.3400/+30.2600+130.3437/+30.2400+130.3531/+30.2200+130.3580/+30.2151+130.3600/+30.2000+130.3745/+30.1855+130.3800/+30.1800+130.3830/+30.1600+130.3899/+30.1400+130.3959/+30.1296+130.4000/+30.1200+130.4074/+30.1000+130.4144/+30.0829+130.4200/+30.0800+130.4209/+30.0600+130.4251/+30.0400+130.4336/+30.0200+130.4209/+30.0177+130.4200/+30.0019+130.4000/+30.0200+130.3819/+30.0214+130.3800/+30.0398+130.3600/+30.0400+130.3598/+30.0600+130.3437/+30.0655+130.3400/+30.0800+130.3313/+30.0916+130.3200/+30.1000+130.3132/+30.1200+130.3029/+30.1239+130.3000/+30.1400+130.2895/+30.1600+130.2807/+30.1623+130.2800/+30.1800+130.2736/+30.2000+130.2665/+30.2200+130.2633/+30.2277+130.2600/+30.2400+130.2515/+30.2600+130.2459/+30.2800+130.2419/+30.2902+130.2400/+30.3000+130.2335/+30.3200+130.2253/+30.3400+130.2218/+30.3600+130.2204/+30.3634+130.2200/+30.3800+130.2049/+30.4000+130.2003/+30.4200+130.2000/+30.4210+130.2000/+30.4400+130.1819/+30.4586+130.2000/+30.4600+130.2055/+30.4734+130.2200/ 南 50 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4400+130.2391/+30.4201+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 南東 1 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、１日０９時から１２時までは火口から南東方向に降灰が予想されます。 　１日３時から１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 　０１日０３時から０６時まで　南東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０１日０６時から０９時まで　南東　　　　　　５０ｋｍ　　１ｋｍ　　　　　 　０１日０９時から１２時まで　南東　　　　　　５０ｋｍ　　１ｋｍ　　　　　 　０１日１２時から１５時まで　南東　　　　　　５０ｋｍ　　１ｋｍ　　　　　 　０１日１５時から１８時まで　南東　　　　　　５０ｋｍ　　１ｋｍ　　　　　 　０１日１８時から２１時まで　南　　　　　　　５０ｋｍ　　１ｋｍ　　　　　 　 　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。