2026-09-20T11:00:00Z 通常 気象庁本庁 気象庁 2026-09-20T20:00:00+09:00 2026-09-20T21:00:00+09:00 2026-09-21T15:00:00+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、２０日２１時から２４時までは火口から南方向、２１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 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 2026-09-20T21:00:00+09:00 2026-09-21T00:00:00+09:00 降灰 70 +30.8197+130.3000/+30.8194+130.3200/+30.8000+130.3394/+30.7800+130.3399/+30.7600+130.3400/+30.7591+130.3400/+30.7400+130.3588/+30.7200+130.3597/+30.7000+130.3599/+30.6963+130.3600/+30.6800+130.3748/+30.6600+130.3787/+30.6400+130.3798/+30.6382+130.3800/+30.6200+130.3955/+30.6000+130.3988/+30.5913+130.4000/+30.5800+130.4081/+30.5600+130.4158/+30.5536+130.4200/+30.5400+130.4344/+30.5200+130.4396/+30.5184+130.4400/+30.5000+130.4491/+30.4800+130.4551/+30.4731+130.4600/+30.4600+130.4779/+30.4571+130.4800/+30.4400+130.4969/+30.4359+130.5000/+30.4200+130.5106/+30.4026+130.5200/+30.4000+130.5227/+30.3955+130.5200/+30.3800+130.5139/+30.3675+130.5000/+30.3600+130.4939/+30.3400+130.4806/+30.3391+130.4800/+30.3222+130.4600/+30.3200+130.4450/+30.3193+130.4400/+30.3200+130.4367/+30.3243+130.4200/+30.3323+130.4000/+30.3400+130.3924/+30.3600+130.3801/+30.3602+130.3800/+30.3800+130.3736/+30.4000+130.3700/+30.4200+130.3682/+30.4400+130.3684/+30.4600+130.3639/+30.4730+130.3600/+30.4800+130.3569/+30.5000+130.3470/+30.5200+130.3431/+30.5400+130.3434/+30.5600+130.3407/+30.5655+130.3400/+30.5800+130.3296/+30.6000+130.3226/+30.6200+130.3209/+30.6346+130.3200/+30.6400+130.3153/+30.6600+130.3027/+30.6800+130.3006/+30.7000+130.3002/+30.7107+130.3000/+30.7200+130.2908/+30.7400+130.2804/+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/+30.7919+130.3200/+30.7800+130.3319/+30.7616+130.3200/+30.7603+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 2 鹿児島県三島村 4630300 2026-09-21T00:00:00+09:00 2026-09-21T03:00:00+09:00 降灰 70 +30.8195+130.3000/+30.8191+130.3200/+30.8000+130.3391/+30.7800+130.3399/+30.7768+130.3400/+30.7600+130.3568/+30.7400+130.3597/+30.7200+130.3599/+30.7185+130.3600/+30.7000+130.3779/+30.6800+130.3794/+30.6711+130.3800/+30.6600+130.3909/+30.6400+130.3982/+30.6210+130.4000/+30.6200+130.4009/+30.6000+130.4164/+30.5800+130.4197/+30.5790+130.4200/+30.5600+130.4352/+30.5522+130.4400/+30.5400+130.4523/+30.5200+130.4587/+30.5164+130.4600/+30.5000+130.4763/+30.4941+130.4800/+30.4800+130.4887/+30.4718+130.5000/+30.4600+130.5142/+30.4449+130.5200/+30.4400+130.5250/+30.4301+130.5400/+30.4200+130.5499/+30.4069+130.5600/+30.4000+130.5702/+30.3800+130.5614/+30.3774+130.5600/+30.3600+130.5523/+30.3460+130.5400/+30.3400+130.5336/+30.3307+130.5200/+30.3221+130.5000/+30.3200+130.4930/+30.3166+130.4800/+30.3123+130.4600/+30.3139+130.4400/+30.3200+130.4279/+30.3261+130.4200/+30.3400+130.4094/+30.3592+130.4000/+30.3600+130.3995/+30.3800+130.3907/+30.4000+130.3851/+30.4200+130.3818/+30.4400+130.3849/+30.4600+130.3804/+30.4608+130.3800/+30.4800+130.3703/+30.5000+130.3620/+30.5038+130.3600/+30.5200+130.3503/+30.5400+130.3516/+30.5600+130.3443/+30.5800+130.3412/+30.5868+130.3400/+30.6000+130.3296/+30.6200+130.3227/+30.6400+130.3208/+30.6501+130.3200/+30.6600+130.3112/+30.6800+130.3017/+30.7000+130.3004/+30.7200+130.3001/+30.7207+130.3000/+30.7400+130.2811/+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/+30.7953+130.3200/+30.7800+130.3353/+30.7600+130.3245/+30.7537+130.3200/+30.7600+130.3026/+30.7601+130.3000/+30.7800+130.2812/+30.8000+130.2812/+30.8188+130.3000/ 南 4 鹿児島県三島村 4630300 2026-09-21T03:00:00+09:00 2026-09-21T06:00:00+09:00 降灰 70 +30.8194+130.3000/+30.8190+130.3200/+30.8000+130.3390/+30.7800+130.3399/+30.7764+130.3400/+30.7600+130.3564/+30.7400+130.3597/+30.7200+130.3599/+30.7178+130.3600/+30.7000+130.3773/+30.6800+130.3794/+30.6659+130.3800/+30.6600+130.3858/+30.6400+130.3977/+30.6200+130.3995/+30.6171+130.4000/+30.6000+130.4147/+30.5800+130.4185/+30.5740+130.4200/+30.5600+130.4324/+30.5498+130.4400/+30.5400+130.4497/+30.5200+130.4550/+30.5000+130.4594/+30.4982+130.4600/+30.4800+130.4751/+30.4754+130.4800/+30.4616+130.5000/+30.4600+130.5018/+30.4400+130.5116/+30.4200+130.5177/+30.4112+130.5200/+30.4000+130.5295/+30.3800+130.5371/+30.3600+130.5390/+30.3400+130.5330/+30.3283+130.5200/+30.3200+130.5060/+30.3173+130.5000/+30.3073+130.4800/+30.3023+130.4600/+30.3023+130.4400/+30.3075+130.4200/+30.3187+130.4000/+30.3200+130.3983/+30.3400+130.3821/+30.3461+130.3800/+30.3600+130.3774/+30.3800+130.3754/+30.4000+130.3737/+30.4200+130.3723/+30.4400+130.3764/+30.4600+130.3709/+30.4800+130.3652/+30.4943+130.3600/+30.5000+130.3568/+30.5200+130.3476/+30.5400+130.3501/+30.5600+130.3433/+30.5800+130.3408/+30.5860+130.3400/+30.6000+130.3306/+30.6200+130.3228/+30.6400+130.3206/+30.6484+130.3200/+30.6600+130.3106/+30.6800+130.3018/+30.7000+130.3004/+30.7200+130.3001/+30.7207+130.3000/+30.7400+130.2814/+30.7600+130.2801/+30.7800+130.2801/+30.8000+130.2806/+30.8194+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 +30.7988+130.3000/+30.7961+130.3200/+30.7800+130.3361/+30.7600+130.3261/+30.7515+130.3200/+30.7551+130.3000/+30.7600+130.2951/+30.7800+130.2812/+30.7988+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/+30.7779+130.3400/+30.7600+130.3579/+30.7400+130.3598/+30.7200+130.3600/+30.7195+130.3600/+30.7000+130.3783/+30.6800+130.3795/+30.6742+130.3800/+30.6600+130.3935/+30.6400+130.3986/+30.6280+130.4000/+30.6200+130.4073/+30.6000+130.4166/+30.5806+130.4200/+30.5800+130.4206/+30.5600+130.4351/+30.5523+130.4400/+30.5400+130.4520/+30.5200+130.4562/+30.5058+130.4600/+30.5000+130.4651/+30.4800+130.4774/+30.4762+130.4800/+30.4600+130.4978/+30.4570+130.5000/+30.4400+130.5083/+30.4200+130.5084/+30.4000+130.5085/+30.3825+130.5000/+30.3800+130.4984/+30.3600+130.4891/+30.3422+130.4800/+30.3400+130.4785/+30.3200+130.4619/+30.3186+130.4600/+30.3102+130.4400/+30.3053+130.4200/+30.3003+130.4000/+30.3177+130.3800/+30.3200+130.3785/+30.3400+130.3697/+30.3600+130.3697/+30.3800+130.3693/+30.4000+130.3688/+30.4200+130.3686/+30.4400+130.3714/+30.4600+130.3678/+30.4800+130.3631/+30.4878+130.3600/+30.5000+130.3533/+30.5200+130.3468/+30.5400+130.3485/+30.5600+130.3432/+30.5800+130.3410/+30.5851+130.3400/+30.6000+130.3282/+30.6200+130.3224/+30.6400+130.3206/+30.6463+130.3200/+30.6600+130.3088/+30.6800+130.3017/+30.7000+130.3004/+30.7200+130.3000/+30.7204+130.3000/+30.7400+130.2813/+30.7600+130.2801/+30.7800+130.2801/+30.8000+130.2805/+30.8195+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/+30.7962+130.3200/+30.7800+130.3362/+30.7600+130.3241/+30.7542+130.3200/+30.7557+130.3000/+30.7600+130.2957/+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 +30.8194+130.3000/+30.8192+130.3200/+30.8000+130.3392/+30.7800+130.3400/+30.7798+130.3400/+30.7600+130.3597/+30.7400+130.3600/+30.7398+130.3600/+30.7200+130.3791/+30.7030+130.3800/+30.7000+130.3830/+30.6800+130.3986/+30.6669+130.4000/+30.6600+130.4068/+30.6400+130.4183/+30.6316+130.4200/+30.6200+130.4309/+30.6000+130.4387/+30.5957+130.4400/+30.5800+130.4538/+30.5600+130.4595/+30.5590+130.4600/+30.5532+130.4800/+30.5400+130.4877/+30.5200+130.4988/+30.5181+130.5000/+30.5000+130.5131/+30.4874+130.5200/+30.4800+130.5307/+30.4757+130.5400/+30.4600+130.5550/+30.4473+130.5600/+30.4400+130.5677/+30.4320+130.5800/+30.4200+130.5924/+30.4045+130.6000/+30.4000+130.6045/+30.3860+130.6000/+30.3800+130.5992/+30.3600+130.5959/+30.3400+130.5877/+30.3306+130.5800/+30.3200+130.5664/+30.3166+130.5600/+30.3098+130.5400/+30.3051+130.5200/+30.3009+130.5000/+30.3061+130.4800/+30.3161+130.4600/+30.3200+130.4549/+30.3383+130.4400/+30.3400+130.4389/+30.3567+130.4400/+30.3600+130.4401/+30.3605+130.4400/+30.3800+130.4332/+30.4000+130.4283/+30.4200+130.4220/+30.4287+130.4200/+30.4400+130.4178/+30.4600+130.4157/+30.4800+130.4079/+30.5000+130.4012/+30.5026+130.4000/+30.5200+130.3826/+30.5400+130.3837/+30.5527+130.3800/+30.5600+130.3744/+30.5800+130.3636/+30.5970+130.3600/+30.6000+130.3575/+30.6200+130.3437/+30.6400+130.3404/+30.6419+130.3400/+30.6600+130.3241/+30.6800+130.3206/+30.6854+130.3200/+30.7000+130.3059/+30.7200+130.3004/+30.7400+130.3000/+30.7402+130.3000/+30.7600+130.2803/+30.7800+130.2801/+30.8000+130.2806/+30.8194+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/+30.7966+130.3200/+30.7800+130.3366/+30.7600+130.3259/+30.7532+130.3200/+30.7600+130.3151/+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 2026-09-21T12:00:00+09:00 2026-09-21T15:00:00+09:00 降灰 70 +30.8195+130.3000/+30.8194+130.3200/+30.8000+130.3394/+30.7980+130.3400/+30.7800+130.3580/+30.7600+130.3599/+30.7595+130.3600/+30.7400+130.3794/+30.7354+130.3800/+30.7200+130.3954/+30.7000+130.3999/+30.6996+130.4000/+30.6800+130.4189/+30.6772+130.4200/+30.6600+130.4368/+30.6535+130.4400/+30.6400+130.4535/+30.6289+130.4600/+30.6200+130.4688/+30.6012+130.4800/+30.6000+130.4812/+30.5932+130.5000/+30.5800+130.5155/+30.5715+130.5200/+30.5600+130.5342/+30.5537+130.5400/+30.5400+130.5503/+30.5311+130.5600/+30.5200+130.5773/+30.5172+130.5800/+30.5000+130.5975/+30.4972+130.6000/+30.4800+130.6197/+30.4798+130.6200/+30.4642+130.6400/+30.4600+130.6492/+30.4495+130.6600/+30.4400+130.6682/+30.4249+130.6800/+30.4200+130.6834/+30.4000+130.6953/+30.3800+130.6974/+30.3720+130.7000/+30.3600+130.7050/+30.3430+130.7000/+30.3526+130.6800/+30.3544+130.6600/+30.3572+130.6400/+30.3600+130.6278/+30.3612+130.6200/+30.3638+130.6000/+30.3652+130.5800/+30.3701+130.5600/+30.3800+130.5513/+30.4000+130.5468/+30.4056+130.5400/+30.4200+130.5266/+30.4379+130.5200/+30.4400+130.5189/+30.4506+130.5000/+30.4600+130.4908/+30.4800+130.4814/+30.4810+130.4800/+30.5000+130.4620/+30.5018+130.4600/+30.5176+130.4400/+30.5200+130.4379/+30.5400+130.4248/+30.5600+130.4220/+30.5623+130.4200/+30.5800+130.4039/+30.5866+130.4000/+30.6000+130.3874/+30.6190+130.3800/+30.6200+130.3790/+30.6400+130.3618/+30.6459+130.3600/+30.6600+130.3466/+30.6800+130.3404/+30.6809+130.3400/+30.7000+130.3214/+30.7106+130.3200/+30.7200+130.3106/+30.7400+130.3002/+30.7410+130.3000/+30.7600+130.2810/+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/+30.7970+130.3200/+30.7800+130.3370/+30.7600+130.3226/+30.7573+130.3200/+30.7600+130.3180/+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 　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、２０日２１時から２４時までは火口から南方向、２１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。 　２０日２１時から２１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 　２０日２１時から２４時まで　南　　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２１日００時から０３時まで　南　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日０３時から０６時まで　南　　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日０６時から０９時まで　南　　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　２１日０９時から１２時まで　南東　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２１日１２時から１５時まで　南東　　　　　　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：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。