2026-09-20T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-21T02:00:00+09:00 2026-09-21T03:00:00+09:00 2026-09-21T21:00:00+09:00 508 発表 1 降灰予報 1.1_0 　現在、薩摩硫黄島は噴火警戒レベル２（火口周辺規制）です。薩摩硫黄島で噴火が発生した場合には、２１日０９時から１２時までは火口から南方向に降灰が予想されます。 降灰予報（定時） 06 薩摩硫黄島 508 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 鹿児島県三島村 4630300 降灰予報（定時） 06 薩摩硫黄島 508 +3047.58+13018.32+704/ 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 鹿児島県三島村 4630300 2026-09-21T03:00:00+09:00 2026-09-21T06:00:00+09:00 降灰 70 +30.8197+130.3000/+30.8193+130.3200/+30.8000+130.3393/+30.7800+130.3399/+30.7600+130.3400/+30.7598+130.3400/+30.7400+130.3593/+30.7200+130.3598/+30.7001+130.3600/+30.7000+130.3601/+30.6800+130.3780/+30.6600+130.3794/+30.6529+130.3800/+30.6400+130.3920/+30.6200+130.3985/+30.6074+130.4000/+30.6000+130.4066/+30.5800+130.4167/+30.5626+130.4200/+30.5600+130.4221/+30.5458+130.4400/+30.5400+130.4462/+30.5200+130.4545/+30.5020+130.4600/+30.5000+130.4625/+30.4830+130.4800/+30.4800+130.4826/+30.4699+130.5000/+30.4600+130.5139/+30.4512+130.5200/+30.4400+130.5338/+30.4313+130.5400/+30.4200+130.5489/+30.4029+130.5600/+30.4000+130.5630/+30.3978+130.5600/+30.3821+130.5400/+30.3800+130.5366/+30.3709+130.5200/+30.3637+130.5000/+30.3600+130.4899/+30.3551+130.4800/+30.3478+130.4600/+30.3483+130.4400/+30.3600+130.4220/+30.3611+130.4200/+30.3800+130.4032/+30.3886+130.4000/+30.4000+130.3932/+30.4200+130.3827/+30.4400+130.3835/+30.4519+130.3800/+30.4600+130.3764/+30.4800+130.3675/+30.4987+130.3600/+30.5000+130.3592/+30.5200+130.3481/+30.5400+130.3515/+30.5600+130.3442/+30.5800+130.3411/+30.5875+130.3400/+30.6000+130.3295/+30.6200+130.3224/+30.6400+130.3206/+30.6474+130.3200/+30.6600+130.3085/+30.6800+130.3012/+30.7000+130.3003/+30.7200+130.3000/+30.7203+130.3000/+30.7400+130.2807/+30.7600+130.2801/+30.7800+130.2801/+30.8000+130.2803/+30.8197+130.3000/ 南 50 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 +30.8188+130.3000/+30.8000+130.3188/+30.7914+130.3200/+30.7800+130.3314/+30.7600+130.3229/+30.7561+130.3200/+30.7598+130.3000/+30.7600+130.2998/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 4 鹿児島県三島村 4630300 2026-09-21T06:00:00+09:00 2026-09-21T09:00:00+09:00 降灰 70 +30.8195+130.3000/+30.8191+130.3200/+30.8000+130.3391/+30.7800+130.3399/+30.7600+130.3400/+30.7584+130.3400/+30.7400+130.3580/+30.7200+130.3595/+30.7000+130.3597/+30.6873+130.3600/+30.6800+130.3669/+30.6600+130.3772/+30.6400+130.3788/+30.6200+130.3799/+30.6187+130.3800/+30.6000+130.3931/+30.5800+130.3966/+30.5600+130.3984/+30.5437+130.4000/+30.5400+130.4061/+30.5280+130.4200/+30.5200+130.4234/+30.5000+130.4284/+30.4800+130.4317/+30.4600+130.4357/+30.4400+130.4400/+30.4399+130.4400/+30.4200+130.4499/+30.4000+130.4568/+30.3800+130.4562/+30.3600+130.4537/+30.3400+130.4469/+30.3300+130.4400/+30.3200+130.4338/+30.3064+130.4200/+30.3000+130.4091/+30.2800+130.4025/+30.2729+130.4000/+30.2800+130.3955/+30.3000+130.3834/+30.3011+130.3800/+30.3134+130.3600/+30.3200+130.3545/+30.3400+130.3442/+30.3536+130.3400/+30.3600+130.3388/+30.3800+130.3360/+30.4000+130.3339/+30.4200+130.3324/+30.4340+130.3400/+30.4400+130.3418/+30.4594+130.3400/+30.4600+130.3398/+30.4800+130.3318/+30.5000+130.3239/+30.5124+130.3200/+30.5200+130.3170/+30.5232+130.3200/+30.5400+130.3241/+30.5600+130.3217/+30.5800+130.3205/+30.5874+130.3200/+30.6000+130.3127/+30.6200+130.3054/+30.6400+130.3021/+30.6600+130.3008/+30.6800+130.3003/+30.6952+130.3000/+30.7000+130.2958/+30.7200+130.2820/+30.7400+130.2803/+30.7600+130.2801/+30.7800+130.2801/+30.8000+130.2805/+30.8195+130.3000/ 南 60 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 +30.8188+130.3000/+30.8000+130.3188/+30.7928+130.3200/+30.7800+130.3327/+30.7600+130.3233/+30.7552+130.3200/+30.7561+130.3000/+30.7600+130.2971/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 4 鹿児島県三島村 4630300 2026-09-21T09:00:00+09:00 2026-09-21T12:00:00+09:00 降灰 70 +30.8195+130.3000/+30.8193+130.3200/+30.8000+130.3393/+30.7800+130.3400/+30.7796+130.3400/+30.7600+130.3595/+30.7400+130.3599/+30.7388+130.3600/+30.7200+130.3783/+30.7000+130.3798/+30.6981+130.3800/+30.6800+130.3968/+30.6600+130.3996/+30.6577+130.4000/+30.6400+130.4158/+30.6200+130.4196/+30.6186+130.4200/+30.6000+130.4358/+30.5845+130.4400/+30.5800+130.4440/+30.5600+130.4560/+30.5520+130.4600/+30.5400+130.4761/+30.5333+130.4800/+30.5200+130.4889/+30.5010+130.5000/+30.5000+130.5008/+30.4800+130.5156/+30.4746+130.5200/+30.4613+130.5400/+30.4600+130.5412/+30.4400+130.5530/+30.4200+130.5576/+30.4140+130.5600/+30.4000+130.5728/+30.3822+130.5600/+30.3800+130.5588/+30.3600+130.5434/+30.3561+130.5400/+30.3400+130.5260/+30.3338+130.5200/+30.3206+130.5000/+30.3200+130.4987/+30.3127+130.4800/+30.3071+130.4600/+30.3084+130.4400/+30.3200+130.4216/+30.3215+130.4200/+30.3400+130.4079/+30.3600+130.4003/+30.3800+130.4000/+30.3836+130.4000/+30.4000+130.3996/+30.4200+130.3981/+30.4400+130.3976/+30.4600+130.3931/+30.4800+130.3853/+30.4895+130.3800/+30.5000+130.3736/+30.5200+130.3633/+30.5400+130.3629/+30.5502+130.3600/+30.5600+130.3547/+30.5800+130.3452/+30.6000+130.3408/+30.6044+130.3400/+30.6200+130.3306/+30.6400+130.3236/+30.6600+130.3205/+30.6644+130.3200/+30.6800+130.3086/+30.7000+130.3014/+30.7200+130.3002/+30.7247+130.3000/+30.7400+130.2852/+30.7600+130.2802/+30.7800+130.2801/+30.8000+130.2805/+30.8195+130.3000/ 南 60 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 +30.8188+130.3000/+30.8000+130.3188/+30.7965+130.3200/+30.7800+130.3365/+30.7600+130.3240/+30.7554+130.3200/+30.7600+130.3077/+30.7602+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 4 鹿児島県三島村 4630300 2026-09-21T12:00:00+09:00 2026-09-21T15:00:00+09:00 降灰 70 +30.8195+130.3000/+30.8194+130.3200/+30.8000+130.3394/+30.7973+130.3400/+30.7800+130.3573/+30.7600+130.3599/+30.7591+130.3600/+30.7400+130.3791/+30.7298+130.3800/+30.7200+130.3898/+30.7000+130.3995/+30.6977+130.4000/+30.6800+130.4174/+30.6710+130.4200/+30.6600+130.4309/+30.6400+130.4395/+30.6388+130.4400/+30.6200+130.4575/+30.6153+130.4600/+30.6000+130.4751/+30.5897+130.4800/+30.5812+130.5000/+30.5800+130.5013/+30.5600+130.5157/+30.5500+130.5200/+30.5400+130.5299/+30.5317+130.5400/+30.5200+130.5523/+30.5097+130.5600/+30.5000+130.5737/+30.4940+130.5800/+30.4800+130.5895/+30.4720+130.6000/+30.4600+130.6198/+30.4598+130.6200/+30.4400+130.6365/+30.4324+130.6400/+30.4200+130.6495/+30.4046+130.6600/+30.4000+130.6637/+30.3855+130.6600/+30.3800+130.6583/+30.3600+130.6424/+30.3587+130.6400/+30.3532+130.6200/+30.3502+130.6000/+30.3442+130.5800/+30.3400+130.5669/+30.3372+130.5600/+30.3353+130.5400/+30.3400+130.5203/+30.3401+130.5200/+30.3536+130.5000/+30.3600+130.4974/+30.3800+130.4988/+30.4000+130.4968/+30.4200+130.4881/+30.4400+130.4837/+30.4452+130.4800/+30.4600+130.4690/+30.4800+130.4608/+30.4809+130.4600/+30.4995+130.4400/+30.5000+130.4396/+30.5200+130.4225/+30.5239+130.4200/+30.5400+130.4105/+30.5600+130.4053/+30.5750+130.4000/+30.5800+130.3957/+30.6000+130.3825/+30.6058+130.3800/+30.6200+130.3668/+30.6400+130.3605/+30.6414+130.3600/+30.6600+130.3428/+30.6800+130.3400/+30.6801+130.3400/+30.7000+130.3209/+30.7064+130.3200/+30.7200+130.3064/+30.7400+130.3002/+30.7409+130.3000/+30.7600+130.2809/+30.7800+130.2801/+30.8000+130.2805/+30.8195+130.3000/ 南東 60 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 +30.8188+130.3000/+30.8000+130.3188/+30.7972+130.3200/+30.7800+130.3372/+30.7600+130.3203/+30.7597+130.3200/+30.7600+130.3198/+30.7612+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 4 鹿児島県三島村 4630300 2026-09-21T15:00:00+09:00 2026-09-21T18:00:00+09:00 降灰 70 +30.8196+130.3000/+30.8195+130.3200/+30.8000+130.3395/+30.7974+130.3400/+30.7800+130.3574/+30.7600+130.3599/+30.7590+130.3600/+30.7400+130.3789/+30.7316+130.3800/+30.7200+130.3916/+30.7000+130.3995/+30.6982+130.4000/+30.6800+130.4175/+30.6729+130.4200/+30.6600+130.4326/+30.6427+130.4400/+30.6400+130.4426/+30.6200+130.4583/+30.6160+130.4600/+30.6000+130.4742/+30.5912+130.4800/+30.5800+130.4984/+30.5783+130.5000/+30.5600+130.5137/+30.5504+130.5200/+30.5400+130.5300/+30.5257+130.5400/+30.5200+130.5455/+30.5000+130.5568/+30.4936+130.5600/+30.4800+130.5718/+30.4707+130.5800/+30.4600+130.5906/+30.4514+130.6000/+30.4400+130.6136/+30.4200+130.6040/+30.4000+130.6074/+30.3960+130.6000/+30.3839+130.5800/+30.3800+130.5710/+30.3760+130.5600/+30.3682+130.5400/+30.3600+130.5220/+30.3588+130.5200/+30.3479+130.5000/+30.3450+130.4800/+30.3404+130.4600/+30.3476+130.4400/+30.3600+130.4317/+30.3800+130.4325/+30.4000+130.4332/+30.4200+130.4339/+30.4400+130.4346/+30.4600+130.4300/+30.4800+130.4233/+30.4842+130.4200/+30.5000+130.4102/+30.5174+130.4000/+30.5200+130.3974/+30.5400+130.3888/+30.5600+130.3813/+30.5640+130.3800/+30.5800+130.3701/+30.6000+130.3609/+30.6022+130.3600/+30.6200+130.3474/+30.6400+130.3417/+30.6476+130.3400/+30.6600+130.3296/+30.6800+130.3217/+30.6967+130.3200/+30.7000+130.3169/+30.7200+130.3013/+30.7400+130.3001/+30.7405+130.3000/+30.7600+130.2806/+30.7800+130.2801/+30.8000+130.2804/+30.8196+130.3000/ 南東 50 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 +30.8188+130.3000/+30.8000+130.3188/+30.7968+130.3200/+30.7800+130.3368/+30.7606+130.3200/+30.7604+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 2 鹿児島県三島村 4630300 2026-09-21T18:00:00+09:00 2026-09-21T21:00:00+09:00 降灰 70 +30.8197+130.3000/+30.8195+130.3200/+30.8000+130.3395/+30.7800+130.3400/+30.7796+130.3400/+30.7600+130.3593/+30.7400+130.3599/+30.7389+130.3600/+30.7200+130.3779/+30.7000+130.3797/+30.6984+130.3800/+30.6800+130.3964/+30.6600+130.3999/+30.6594+130.4000/+30.6400+130.4151/+30.6200+130.4199/+30.6198+130.4200/+30.6000+130.4349/+30.5800+130.4400/+30.5799+130.4400/+30.5600+130.4550/+30.5477+130.4600/+30.5400+130.4669/+30.5200+130.4760/+30.5104+130.4800/+30.5000+130.4856/+30.4800+130.4950/+30.4621+130.5000/+30.4600+130.5007/+30.4400+130.5052/+30.4276+130.5000/+30.4200+130.4960/+30.4000+130.4802/+30.3998+130.4800/+30.3800+130.4687/+30.3676+130.4600/+30.3600+130.4514/+30.3519+130.4400/+30.3451+130.4200/+30.3400+130.4043/+30.3377+130.4000/+30.3400+130.3976/+30.3589+130.3800/+30.3600+130.3795/+30.3800+130.3752/+30.4000+130.3722/+30.4200+130.3718/+30.4400+130.3730/+30.4600+130.3716/+30.4800+130.3687/+30.4949+130.3600/+30.5000+130.3575/+30.5200+130.3488/+30.5400+130.3465/+30.5600+130.3405/+30.5617+130.3400/+30.5800+130.3297/+30.6000+130.3245/+30.6200+130.3202/+30.6210+130.3200/+30.6400+130.3100/+30.6600+130.3031/+30.6800+130.3008/+30.6918+130.3000/+30.7000+130.2946/+30.7200+130.2837/+30.7400+130.2806/+30.7600+130.2801/+30.7800+130.2800/+30.8000+130.2803/+30.8197+130.3000/ 南 50 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 +30.8188+130.3000/+30.8000+130.3188/+30.7924+130.3200/+30.7800+130.3324/+30.7633+130.3200/+30.7605+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 2 鹿児島県三島村 4630300 　現在、薩摩硫黄島は噴火警戒レベル２（火口周辺規制）です。薩摩硫黄島で噴火が発生した場合には、２１日０９時から１２時までは火口から南方向に降灰が予想されます。 　２１日３時から２１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 　２１日０３時から０６時まで　南　　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　２１日０６時から０９時まで　南　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日０９時から１２時まで　南　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日１２時から１５時まで　南東　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日１５時から１８時まで　南東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２１日１８時から２１時まで　南　　　　　　　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：三島村、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。