2026-07-30T23:00:00Z 通常 気象庁本庁 気象庁 2026-07-31T08:00:00+09:00 2026-07-31T09:00:00+09:00 2026-08-01T03:00:00+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、３１日０９時から１２時までは火口から南東方向、３１日２１時から２４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 2026-07-31T09:00:00+09:00 2026-07-31T12:00:00+09:00 降灰 70 +30.4785+130.2200/+30.4600+130.2396/+30.4600+130.2400/+30.4597+130.2600/+30.4400+130.2799/+30.4399+130.2800/+30.4383+130.3000/+30.4200+130.3191/+30.4197+130.3200/+30.4170+130.3400/+30.4000+130.3581/+30.3993+130.3600/+30.3942+130.3800/+30.3823+130.4000/+30.3800+130.4025/+30.3709+130.4200/+30.3600+130.4343/+30.3553+130.4400/+30.3523+130.4600/+30.3400+130.4726/+30.3209+130.4800/+30.3200+130.4814/+30.3000+130.4996/+30.2996+130.5000/+30.2800+130.5138/+30.2600+130.5153/+30.2400+130.5122/+30.2200+130.5077/+30.2172+130.5000/+30.2171+130.4800/+30.2200+130.4629/+30.2202+130.4600/+30.2366+130.4400/+30.2400+130.4376/+30.2564+130.4200/+30.2600+130.4162/+30.2711+130.4000/+30.2800+130.3915/+30.2929+130.3800/+30.3000+130.3731/+30.3171+130.3600/+30.3200+130.3569/+30.3265+130.3400/+30.3400+130.3266/+30.3426+130.3200/+30.3600+130.3017/+30.3605+130.3000/+30.3682+130.2800/+30.3800+130.2681/+30.3805+130.2600/+30.4000+130.2401/+30.4000+130.2400/+30.4002+130.2200/+30.4200+130.2002/+30.4390+130.2000/+30.4400+130.1990/+30.4411+130.2000/+30.4600+130.2013/+30.4785+130.2200/ 南東 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4450+130.2400/+30.4400+130.2457/+30.4330+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 2026-07-31T12:00:00+09:00 2026-07-31T15:00:00+09:00 降灰 70 +30.4787+130.2200/+30.4616+130.2400/+30.4600+130.2416/+30.4598+130.2600/+30.4553+130.2800/+30.4400+130.2956/+30.4394+130.3000/+30.4357+130.3200/+30.4200+130.3378/+30.4193+130.3400/+30.4143+130.3600/+30.4007+130.3800/+30.4000+130.3809/+30.3938+130.4000/+30.3800+130.4167/+30.3720+130.4200/+30.3600+130.4287/+30.3400+130.4382/+30.3333+130.4400/+30.3270+130.4600/+30.3200+130.4658/+30.3000+130.4772/+30.2961+130.4800/+30.2811+130.5000/+30.2800+130.5009/+30.2600+130.5078/+30.2400+130.5108/+30.2229+130.5200/+30.2200+130.5230/+30.2000+130.5208/+30.1995+130.5200/+30.1983+130.5000/+30.2000+130.4929/+30.2038+130.4800/+30.2137+130.4600/+30.2200+130.4513/+30.2289+130.4400/+30.2400+130.4323/+30.2468+130.4200/+30.2600+130.4067/+30.2662+130.4000/+30.2800+130.3864/+30.2873+130.3800/+30.3000+130.3678/+30.3109+130.3600/+30.3200+130.3507/+30.3253+130.3400/+30.3400+130.3251/+30.3422+130.3200/+30.3600+130.3010/+30.3603+130.3000/+30.3669+130.2800/+30.3800+130.2669/+30.3806+130.2600/+30.4000+130.2402/+30.4000+130.2400/+30.4003+130.2200/+30.4200+130.2003/+30.4399+130.2000/+30.4400+130.1999/+30.4402+130.2000/+30.4600+130.2011/+30.4787+130.2200/ 南東 40 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4588+130.2200/+30.4455+130.2400/+30.4400+130.2462/+30.4320+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 2026-07-31T15:00:00+09:00 2026-07-31T18:00:00+09:00 降灰 70 +30.4775+130.2200/+30.4600+130.2378/+30.4600+130.2400/+30.4579+130.2600/+30.4400+130.2779/+30.4388+130.2800/+30.4200+130.2990/+30.4190+130.3000/+30.4000+130.3198/+30.3997+130.3200/+30.3877+130.3400/+30.3800+130.3480/+30.3607+130.3600/+30.3600+130.3607/+30.3400+130.3779/+30.3348+130.3800/+30.3200+130.3929/+30.3056+130.4000/+30.3000+130.4052/+30.2800+130.4184/+30.2789+130.4200/+30.2600+130.4375/+30.2548+130.4400/+30.2400+130.4559/+30.2337+130.4600/+30.2200+130.4787/+30.2183+130.4800/+30.2000+130.4980/+30.1985+130.5000/+30.1840+130.5200/+30.1800+130.5284/+30.1737+130.5400/+30.1600+130.5573/+30.1523+130.5600/+30.1400+130.5688/+30.1200+130.5727/+30.1082+130.5600/+30.1118+130.5400/+30.1161+130.5200/+30.1200+130.5143/+30.1282+130.5000/+30.1344+130.4800/+30.1400+130.4662/+30.1426+130.4600/+30.1582+130.4400/+30.1600+130.4378/+30.1756+130.4200/+30.1800+130.4166/+30.1901+130.4000/+30.2000+130.3860/+30.2093+130.3800/+30.2200+130.3745/+30.2400+130.3616/+30.2424+130.3600/+30.2600+130.3449/+30.2636+130.3400/+30.2800+130.3243/+30.2869+130.3200/+30.3000+130.3081/+30.3114+130.3000/+30.3200+130.2919/+30.3400+130.2803/+30.3402+130.2800/+30.3600+130.2608/+30.3606+130.2600/+30.3800+130.2408/+30.3804+130.2400/+30.4000+130.2204/+30.4001+130.2200/+30.4200+130.2001/+30.4300+130.2000/+30.4400+130.1900/+30.4510+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/+30.4420+130.2400/+30.4400+130.2420/+30.4350+130.2400/+30.4204+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 東 2 鹿児島県屋久島町 4650500 2026-07-31T18:00:00+09:00 2026-07-31T21:00:00+09:00 降灰 70 +30.4774+130.2200/+30.4600+130.2376/+30.4600+130.2400/+30.4543+130.2600/+30.4400+130.2743/+30.4362+130.2800/+30.4200+130.2963/+30.4165+130.3000/+30.4000+130.3167/+30.3963+130.3200/+30.3800+130.3367/+30.3749+130.3400/+30.3600+130.3546/+30.3484+130.3600/+30.3400+130.3679/+30.3200+130.3775/+30.3127+130.3800/+30.3000+130.3921/+30.2892+130.4000/+30.2800+130.4092/+30.2730+130.4200/+30.2600+130.4318/+30.2476+130.4400/+30.2400+130.4483/+30.2284+130.4600/+30.2200+130.4745/+30.2147+130.4800/+30.2000+130.4953/+30.1956+130.5000/+30.1815+130.5200/+30.1800+130.5235/+30.1714+130.5400/+30.1600+130.5540/+30.1496+130.5600/+30.1400+130.5705/+30.1200+130.5785/+30.1133+130.5800/+30.1026+130.6000/+30.1000+130.6044/+30.0976+130.6000/+30.0952+130.5800/+30.0935+130.5600/+30.0965+130.5400/+30.1000+130.5200/+30.1079+130.5000/+30.1180+130.4800/+30.1200+130.4775/+30.1279+130.4600/+30.1397+130.4400/+30.1400+130.4395/+30.1519+130.4200/+30.1600+130.4115/+30.1710+130.4000/+30.1800+130.3914/+30.1881+130.3800/+30.2000+130.3680/+30.2200+130.3631/+30.2243+130.3600/+30.2400+130.3462/+30.2504+130.3400/+30.2600+130.3317/+30.2800+130.3205/+30.2808+130.3200/+30.3000+130.3032/+30.3069+130.3000/+30.3200+130.2879/+30.3369+130.2800/+30.3400+130.2769/+30.3600+130.2606/+30.3605+130.2600/+30.3800+130.2407/+30.3803+130.2400/+30.4000+130.2204/+30.4001+130.2200/+30.4200+130.2001/+30.4297+130.2000/+30.4400+130.1897/+30.4513+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/+30.4449+130.2400/+30.4400+130.2449/+30.4295+130.2400/+30.4206+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 東 2 鹿児島県屋久島町 4650500 2026-07-31T21:00:00+09:00 2026-08-01T00:00:00+09:00 降灰 70 +30.4778+130.2200/+30.4600+130.2380/+30.4600+130.2400/+30.4566+130.2600/+30.4400+130.2766/+30.4379+130.2800/+30.4200+130.2979/+30.4182+130.3000/+30.4000+130.3186/+30.3984+130.3200/+30.3800+130.3391/+30.3788+130.3400/+30.3600+130.3591/+30.3581+130.3600/+30.3400+130.3770/+30.3323+130.3800/+30.3200+130.3907/+30.3029+130.4000/+30.3000+130.4028/+30.2800+130.4165/+30.2773+130.4200/+30.2600+130.4354/+30.2501+130.4400/+30.2400+130.4502/+30.2239+130.4600/+30.2200+130.4656/+30.2022+130.4800/+30.2000+130.4818/+30.1800+130.4963/+30.1749+130.5000/+30.1600+130.5185/+30.1541+130.5200/+30.1400+130.5275/+30.1254+130.5400/+30.1200+130.5470/+30.1155+130.5400/+30.1093+130.5200/+30.1157+130.5000/+30.1200+130.4864/+30.1217+130.4800/+30.1308+130.4600/+30.1400+130.4429/+30.1412+130.4400/+30.1559+130.4200/+30.1600+130.4165/+30.1800+130.4027/+30.1819+130.4000/+30.1957+130.3800/+30.2000+130.3757/+30.2200+130.3694/+30.2380+130.3600/+30.2400+130.3583/+30.2600+130.3434/+30.2644+130.3400/+30.2800+130.3256/+30.2910+130.3200/+30.3000+130.3117/+30.3200+130.3004/+30.3206+130.3000/+30.3400+130.2823/+30.3424+130.2800/+30.3600+130.2628/+30.3621+130.2600/+30.3800+130.2422/+30.3807+130.2400/+30.4000+130.2207/+30.4001+130.2200/+30.4200+130.2001/+30.4290+130.2000/+30.4400+130.1889/+30.4523+130.2000/+30.4600+130.2017/+30.4778+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/+30.4409+130.2400/+30.4400+130.2409/+30.4379+130.2400/+30.4204+130.2200/+30.4400+130.2012/+30.4588+130.2200/ 東 2 鹿児島県屋久島町 4650500 2026-08-01T00:00:00+09:00 2026-08-01T03:00:00+09:00 降灰 70 +30.4771+130.2200/+30.4600+130.2375/+30.4600+130.2400/+30.4444+130.2600/+30.4400+130.2644/+30.4314+130.2800/+30.4200+130.2914/+30.4136+130.3000/+30.4000+130.3136/+30.3932+130.3200/+30.3800+130.3336/+30.3730+130.3400/+30.3600+130.3533/+30.3515+130.3600/+30.3400+130.3722/+30.3293+130.3800/+30.3200+130.3942/+30.3179+130.4000/+30.3155+130.4200/+30.3000+130.4344/+30.2800+130.4298/+30.2639+130.4400/+30.2800+130.4482/+30.3000+130.4418/+30.3200+130.4433/+30.3400+130.4531/+30.3465+130.4600/+30.3400+130.4693/+30.3288+130.4800/+30.3200+130.4885/+30.3000+130.4944/+30.2800+130.4994/+30.2600+130.4997/+30.2400+130.4885/+30.2200+130.4946/+30.2057+130.5000/+30.2000+130.5023/+30.1819+130.5200/+30.1800+130.5270/+30.1764+130.5400/+30.1702+130.5600/+30.1600+130.5740/+30.1400+130.5728/+30.1218+130.5600/+30.1219+130.5400/+30.1220+130.5200/+30.1242+130.5000/+30.1255+130.4800/+30.1336+130.4600/+30.1400+130.4486/+30.1445+130.4400/+30.1579+130.4200/+30.1600+130.4171/+30.1691+130.4000/+30.1800+130.3889/+30.1862+130.3800/+30.2000+130.3654/+30.2196+130.3600/+30.2200+130.3599/+30.2400+130.3400/+30.2600+130.3237/+30.2665+130.3200/+30.2800+130.3082/+30.2918+130.3000/+30.3000+130.2926/+30.3200+130.2815/+30.3219+130.2800/+30.3400+130.2632/+30.3465+130.2600/+30.3600+130.2471/+30.3799+130.2400/+30.3800+130.2399/+30.4000+130.2202/+30.4001+130.2200/+30.4200+130.2001/+30.4292+130.2000/+30.4400+130.1892/+30.4518+130.2000/+30.4600+130.2024/+30.4771+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/+30.4478+130.2400/+30.4400+130.2478/+30.4277+130.2400/+30.4206+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、３１日０９時から１２時までは火口から南東方向、３１日２１時から２４時までは火口から南東方向に降灰が予想されます。 　３１日９時から１日３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 　３１日０９時から１２時まで　南東　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　３１日１２時から１５時まで　南東　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　３１日１５時から１８時まで　南東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　３１日１８時から２１時まで　南東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　３１日２１時から２４時まで　南東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　０１日００時から０３時まで　南東　　　　　　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。