2026-08-03T11:00:00Z 通常 気象庁本庁 気象庁 2026-08-03T20:00:00+09:00 2026-08-03T21:00:00+09:00 2026-08-04T15:00:00+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、３日２１時から２４時までは火口から南西方向、４日０９時から１２時までは火口から西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 2026-08-03T21:00:00+09:00 2026-08-04T00:00:00+09:00 降灰 70 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南西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4433+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4209+130.2000/+30.4335+130.1800/+30.4400+130.1755/+30.4433+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T00:00:00+09:00 2026-08-04T03:00:00+09:00 降灰 70 +30.4783+130.2000/+30.4777+130.2200/+30.4600+130.2377/+30.4400+130.2398/+30.4200+130.2200/+30.4200+130.2199/+30.4003+130.2000/+30.4001+130.1800/+30.4000+130.1604/+30.3996+130.1600/+30.3815+130.1400/+30.3805+130.1200/+30.3800+130.1088/+30.3717+130.1000/+30.3628+130.0800/+30.3607+130.0600/+30.3600+130.0516/+30.3515+130.0400/+30.3440+130.0200/+30.3410+130.0000/+30.3400+129.9931/+30.3309+129.9800/+30.3239+129.9600/+30.3204+129.9400/+30.3200+129.9390/+30.3054+129.9200/+30.3028+129.9000/+30.3000+129.8816/+30.2990+129.8800/+30.2887+129.8600/+30.2845+129.8400/+30.2817+129.8200/+30.2800+129.8095/+30.2763+129.8000/+30.2688+129.7800/+30.2635+129.7600/+30.2633+129.7400/+30.2635+129.7200/+30.2615+129.7000/+30.2621+129.6800/+30.2640+129.6600/+30.2800+129.6447/+30.3000+129.6405/+30.3099+129.6600/+30.3182+129.6800/+30.3200+129.6851/+30.3248+129.7000/+30.3365+129.7200/+30.3400+129.7302/+30.3429+129.7400/+30.3478+129.7600/+30.3544+129.7800/+30.3600+129.7994/+30.3604+129.8000/+30.3683+129.8200/+30.3780+129.8400/+30.3800+129.8446/+30.3878+129.8600/+30.3935+129.8800/+30.3984+129.9000/+30.3975+129.9200/+30.4000+129.9309/+30.4044+129.9400/+30.4115+129.9600/+30.4170+129.9800/+30.4195+130.0000/+30.4200+130.0037/+30.4292+130.0200/+30.4360+130.0400/+30.4386+130.0600/+30.4397+130.0800/+30.4400+130.0841/+30.4532+130.1000/+30.4585+130.1200/+30.4596+130.1400/+30.4599+130.1600/+30.4600+130.1800/+30.4600+130.1813/+30.4783+130.2000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4464+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4316+130.1800/+30.4400+130.1709/+30.4464+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T03:00:00+09:00 2026-08-04T06:00:00+09:00 降灰 70 +30.4777+130.2000/+30.4771+130.2200/+30.4600+130.2371/+30.4400+130.2399/+30.4200+130.2333/+30.4067+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1786/+30.3818+130.1600/+30.3805+130.1400/+30.3800+130.1319/+30.3685+130.1200/+30.3618+130.1000/+30.3603+130.0800/+30.3600+130.0784/+30.3456+130.0600/+30.3417+130.0400/+30.3400+130.0329/+30.3301+130.0200/+30.3242+130.0000/+30.3200+129.9825/+30.3182+129.9800/+30.3107+129.9600/+30.3060+129.9400/+30.3028+129.9200/+30.3022+129.9000/+30.3007+129.8800/+30.3000+129.8736/+30.2963+129.8600/+30.2968+129.8400/+30.2900+129.8200/+30.2895+129.8000/+30.2889+129.7800/+30.2882+129.7600/+30.2893+129.7400/+30.2851+129.7200/+30.2869+129.7000/+30.2878+129.6800/+30.2887+129.6600/+30.2910+129.6400/+30.2952+129.6200/+30.3000+129.6021/+30.3112+129.6200/+30.3200+129.6344/+30.3234+129.6400/+30.3380+129.6600/+30.3400+129.6619/+30.3498+129.6800/+30.3600+129.6996/+30.3601+129.7000/+30.3600+129.7053/+30.3597+129.7200/+30.3600+129.7207/+30.3674+129.7400/+30.3731+129.7600/+30.3795+129.7800/+30.3800+129.7818/+30.3839+129.8000/+30.3884+129.8200/+30.3944+129.8400/+30.3992+129.8600/+30.4000+129.8633/+30.4047+129.8800/+30.4085+129.9000/+30.4014+129.9200/+30.4124+129.9400/+30.4163+129.9600/+30.4184+129.9800/+30.4200+129.9939/+30.4235+130.0000/+30.4318+130.0200/+30.4364+130.0400/+30.4386+130.0600/+30.4396+130.0800/+30.4400+130.0853/+30.4515+130.1000/+30.4579+130.1200/+30.4595+130.1400/+30.4599+130.1600/+30.4600+130.1800/+30.4600+130.1819/+30.4777+130.2000/ 西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4442+130.1800/+30.4586+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4210+130.2000/+30.4314+130.1800/+30.4400+130.1735/+30.4442+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T06:00:00+09:00 2026-08-04T09:00:00+09:00 降灰 70 +30.4702+130.2000/+30.4735+130.2200/+30.4600+130.2335/+30.4400+130.2398/+30.4200+130.2369/+30.4031+130.2200/+30.4001+130.2000/+30.4000+130.1933/+30.3867+130.1800/+30.3803+130.1600/+30.3800+130.1475/+30.3725+130.1400/+30.3609+130.1200/+30.3600+130.1049/+30.3552+130.1000/+30.3416+130.0800/+30.3400+130.0662/+30.3339+130.0600/+30.3223+130.0400/+30.3200+130.0271/+30.3133+130.0200/+30.3028+130.0000/+30.3000+129.9864/+30.2948+129.9800/+30.2800+129.9697/+30.2692+129.9600/+30.2634+129.9400/+30.2600+129.9265/+30.2565+129.9200/+30.2471+129.9000/+30.2417+129.8800/+30.2400+129.8755/+30.2225+129.8600/+30.2200+129.8550/+30.2146+129.8400/+30.2097+129.8200/+30.2052+129.8000/+30.2000+129.7800/+30.1855+129.7600/+30.1800+129.7415/+30.1796+129.7400/+30.1758+129.7200/+30.1720+129.7000/+30.1721+129.6800/+30.1722+129.6600/+30.1733+129.6400/+30.1800+129.6200/+30.2000+129.6124/+30.2039+129.6200/+30.2125+129.6400/+30.2200+129.6588/+30.2205+129.6600/+30.2309+129.6800/+30.2400+129.6942/+30.2441+129.7000/+30.2600+129.7124/+30.2662+129.7200/+30.2717+129.7400/+30.2783+129.7600/+30.2800+129.7626/+30.2954+129.7800/+30.3000+129.7896/+30.3035+129.8000/+30.3114+129.8200/+30.3182+129.8400/+30.3200+129.8442/+30.3276+129.8600/+30.3380+129.8800/+30.3400+129.8834/+30.3504+129.9000/+30.3548+129.9200/+30.3569+129.9400/+30.3600+129.9568/+30.3626+129.9600/+30.3766+129.9800/+30.3796+130.0000/+30.3800+130.0014/+30.3956+130.0200/+30.3993+130.0400/+30.4000+130.0441/+30.4137+130.0600/+30.4191+130.0800/+30.4200+130.0956/+30.4237+130.1000/+30.4390+130.1200/+30.4399+130.1400/+30.4400+130.1408/+30.4590+130.1600/+30.4599+130.1800/+30.4600+130.1898/+30.4702+130.2000/ 南西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4473+130.1800/+30.4587+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4205+130.2000/+30.4237+130.1800/+30.4400+130.1727/+30.4473+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T09:00:00+09:00 2026-08-04T12:00:00+09:00 降灰 70 +30.4742+130.2000/+30.4754+130.2200/+30.4600+130.2354/+30.4400+130.2398/+30.4200+130.2322/+30.4078+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1779/+30.3822+130.1600/+30.3803+130.1400/+30.3800+130.1200/+30.3800+130.1196/+30.3619+130.1000/+30.3605+130.0800/+30.3600+130.0731/+30.3480+130.0600/+30.3421+130.0400/+30.3401+130.0200/+30.3400+130.0191/+30.3256+130.0000/+30.3214+129.9800/+30.3200+129.9735/+30.3095+129.9600/+30.3013+129.9400/+30.3000+129.9352/+30.2886+129.9200/+30.2804+129.9000/+30.2800+129.8985/+30.2726+129.8800/+30.2669+129.8600/+30.2600+129.8474/+30.2546+129.8400/+30.2512+129.8200/+30.2483+129.8000/+30.2448+129.7800/+30.2400+129.7606/+30.2394+129.7600/+30.2263+129.7400/+30.2236+129.7200/+30.2210+129.7000/+30.2208+129.6800/+30.2206+129.6600/+30.2201+129.6400/+30.2200+129.6368/+30.2190+129.6200/+30.2169+129.6000/+30.2200+129.5920/+30.2285+129.5800/+30.2400+129.5725/+30.2494+129.5800/+30.2600+129.5880/+30.2648+129.6000/+30.2698+129.6200/+30.2744+129.6400/+30.2800+129.6591/+30.2803+129.6600/+30.2893+129.6800/+30.3000+129.6984/+30.3010+129.7000/+30.3082+129.7200/+30.3144+129.7400/+30.3200+129.7563/+30.3227+129.7600/+30.3379+129.7800/+30.3400+129.7851/+30.3443+129.8000/+30.3459+129.8200/+30.3528+129.8400/+30.3568+129.8600/+30.3600+129.8758/+30.3638+129.8800/+30.3785+129.9000/+30.3749+129.9200/+30.3781+129.9400/+30.3800+129.9511/+30.3883+129.9600/+30.3976+129.9800/+30.3994+130.0000/+30.4000+130.0045/+30.4113+130.0200/+30.4180+130.0400/+30.4197+130.0600/+30.4200+130.0637/+30.4332+130.0800/+30.4390+130.1000/+30.4398+130.1200/+30.4400+130.1242/+30.4553+130.1400/+30.4597+130.1600/+30.4599+130.1800/+30.4600+130.1858/+30.4742+130.2000/ 西 70 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4462+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4288+130.1800/+30.4400+130.1709/+30.4462+130.1800/ 西 4 鹿児島県屋久島町 4650500 2026-08-04T12:00:00+09:00 2026-08-04T15:00:00+09:00 降灰 70 +30.4746+130.2000/+30.4757+130.2200/+30.4600+130.2357/+30.4400+130.2398/+30.4200+130.2327/+30.4073+130.2200/+30.4002+130.2000/+30.4001+130.1800/+30.4000+130.1787/+30.3813+130.1600/+30.3802+130.1400/+30.3800+130.1340/+30.3662+130.1200/+30.3608+130.1000/+30.3600+130.0841/+30.3560+130.0800/+30.3422+130.0600/+30.3401+130.0400/+30.3400+130.0393/+30.3243+130.0200/+30.3204+130.0000/+30.3200+129.9975/+30.3079+129.9800/+30.3016+129.9600/+30.3000+129.9553/+30.2812+129.9400/+30.2800+129.9368/+30.2724+129.9200/+30.2678+129.9000/+30.2633+129.8800/+30.2600+129.8683/+30.2557+129.8600/+30.2481+129.8400/+30.2458+129.8200/+30.2430+129.8000/+30.2400+129.7847/+30.2374+129.7800/+30.2256+129.7600/+30.2220+129.7400/+30.2212+129.7200/+30.2203+129.7000/+30.2200+129.6936/+30.2192+129.6800/+30.2173+129.6600/+30.2170+129.6400/+30.2200+129.6224/+30.2206+129.6200/+30.2334+129.6000/+30.2400+129.5968/+30.2436+129.6000/+30.2600+129.6143/+30.2622+129.6200/+30.2690+129.6400/+30.2744+129.6600/+30.2797+129.6800/+30.2800+129.6810/+30.2852+129.7000/+30.2967+129.7200/+30.3000+129.7236/+30.3061+129.7400/+30.3109+129.7600/+30.3167+129.7800/+30.3200+129.7916/+30.3252+129.8000/+30.3326+129.8200/+30.3388+129.8400/+30.3400+129.8431/+30.3475+129.8600/+30.3543+129.8800/+30.3583+129.9000/+30.3587+129.9200/+30.3600+129.9257/+30.3702+129.9400/+30.3771+129.9600/+30.3796+129.9800/+30.3800+129.9818/+30.3951+130.0000/+30.3989+130.0200/+30.4000+130.0303/+30.4086+130.0400/+30.4184+130.0600/+30.4197+130.0800/+30.4200+130.0821/+30.4370+130.1000/+30.4396+130.1200/+30.4400+130.1313/+30.4487+130.1400/+30.4597+130.1600/+30.4599+130.1800/+30.4600+130.1854/+30.4746+130.2000/ 南西 60 鹿児島県屋久島町 4650500 小さな噴石の落下 75 1 +30.4407+130.1800/+30.4584+130.2000/+30.4588+130.2200/+30.4400+130.2388/+30.4212+130.2200/+30.4216+130.2000/+30.4383+130.1800/+30.4400+130.1790/+30.4407+130.1800/ 西 4 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、３日２１時から２４時までは火口から南西方向、４日０９時から１２時までは火口から西方向に降灰が予想されます。 　３日２１時から４日１５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 　０３日２１時から２４時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０４日００時から０３時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０４日０３時から０６時まで　西　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０４日０６時から０９時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　０４日０９時から１２時まで　西　　　　　　　７０ｋｍ　　４ｋｍ　　　　　 　０４日１２時から１５時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　 　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。