2026-09-19T17:00:00Z 通常 気象庁本庁 気象庁 2026-09-20T02:00:00+09:00 2026-09-20T03:00:00+09:00 2026-09-20T21:00:00+09:00 503 発表 1 降灰予報 1.1_0 　現在、阿蘇山は噴火警戒レベル２（火口周辺規制）です。阿蘇山で噴火が発生した場合には、２０日０９時から１２時までは火口から南西方向に降灰が予想されます。 降灰予報（定時） 06 阿蘇山 503 降灰 70 熊本県熊本市 4310000 熊本県八代市 4320200 熊本県宇城市 4321300 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県益城町 4344300 熊本県甲佐町 4344400 熊本県山都町 4344700 熊本県氷川町 4346800 熊本県五木村 4351100 小さな噴石の落下 75 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 降灰予報（定時） 06 阿蘇山 503 +3253.07+13106.23+1592/ 降灰 70 熊本県熊本市 4310000 熊本県八代市 4320200 熊本県宇城市 4321300 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県益城町 4344300 熊本県甲佐町 4344400 熊本県山都町 4344700 熊本県氷川町 4346800 熊本県五木村 4351100 小さな噴石の落下 75 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T03:00:00+09:00 2026-09-20T06:00:00+09:00 降灰 70 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+32.5638+130.7200/+32.5600+130.7210/+32.5593+130.7200/+32.5600+130.7188/+32.5638+130.7200/ 南西 50 熊本県熊本市 4310000 熊本県八代市 4320200 熊本県宇城市 4321300 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県益城町 4344300 熊本県甲佐町 4344400 熊本県山都町 4344700 熊本県氷川町 4346800 小さな噴石の落下 75 1 +32.8824+131.0600/+32.8988+131.0800/+32.8800+131.0988/+32.8604+131.0800/+32.8678+131.0600/+32.8800+131.0576/+32.8824+131.0600/ 西 2 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T06:00:00+09:00 2026-09-20T09:00:00+09:00 降灰 70 +32.9162+131.0800/+32.9000+131.0977/+32.8975+131.1000/+32.8800+131.1159/+32.8641+131.1000/+32.8600+131.0999/+32.8401+131.0800/+32.8400+131.0798/+32.8202+131.0600/+32.8200+131.0595/+32.8005+131.0400/+32.8000+131.0385/+32.7815+131.0200/+32.7800+131.0162/+32.7638+131.0000/+32.7600+130.9894/+32.7505+130.9800/+32.7403+130.9600/+32.7400+130.9596/+32.7208+130.9400/+32.7200+130.9388/+32.7019+130.9200/+32.7000+130.9164/+32.6841+130.9000/+32.6800+130.8944/+32.6600+130.8839/+32.6574+130.8800/+32.6400+130.8645/+32.6332+130.8600/+32.6200+130.8454/+32.6154+130.8400/+32.6000+130.8204/+32.5994+130.8200/+32.5810+130.8000/+32.5800+130.7975/+32.5711+130.7800/+32.5600+130.7665/+32.5531+130.7600/+32.5400+130.7406/+32.5393+130.7400/+32.5287+130.7200/+32.5200+130.7130/+32.5000+130.7056/+32.4943+130.7000/+32.5000+130.6849/+32.5200+130.6879/+32.5400+130.6890/+32.5600+130.6983/+32.5618+130.7000/+32.5800+130.7142/+32.5856+130.7200/+32.6000+130.7300/+32.6144+130.7400/+32.6200+130.7449/+32.6331+130.7600/+32.6400+130.7640/+32.6564+130.7800/+32.6600+130.7831/+32.6800+130.7986/+32.6813+130.8000/+32.6951+130.8200/+32.7000+130.8247/+32.7132+130.8400/+32.7200+130.8482/+32.7314+130.8600/+32.7400+130.8688/+32.7509+130.8800/+32.7600+130.8922/+32.7675+130.9000/+32.7800+130.9195/+32.7805+130.9200/+32.7987+130.9400/+32.8000+130.9414/+32.8180+130.9600/+32.8200+130.9634/+32.8365+130.9800/+32.8400+130.9871/+32.8529+131.0000/+32.8600+131.0200/+32.8799+131.0400/+32.8800+131.0401/+32.8999+131.0600/+32.9000+131.0638/+32.9162+131.0800/ 南西 60 熊本県八代市 4320200 熊本県宇城市 4321300 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県甲佐町 4344400 熊本県山都町 4344700 熊本県氷川町 4346800 小さな噴石の落下 75 1 +32.8879+131.0600/+32.8988+131.0800/+32.8800+131.0988/+32.8600+131.0882/+32.8518+131.0800/+32.8534+131.0600/+32.8600+131.0530/+32.8800+131.0521/+32.8879+131.0600/ 南西 4 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T09:00:00+09:00 2026-09-20T12:00:00+09:00 降灰 70 +32.9173+131.0800/+32.9012+131.1000/+32.9000+131.1012/+32.8800+131.1188/+32.8607+131.1000/+32.8600+131.1000/+32.8400+131.0990/+32.8205+131.0800/+32.8200+131.0797/+32.8000+131.0745/+32.7840+131.0600/+32.7800+131.0567/+32.7625+131.0400/+32.7600+131.0356/+32.7421+131.0200/+32.7400+131.0182/+32.7236+131.0000/+32.7200+130.9948/+32.7051+130.9800/+32.7000+130.9739/+32.6833+130.9600/+32.6800+130.9578/+32.6600+130.9413/+32.6582+130.9400/+32.6400+130.9269/+32.6309+130.9200/+32.6200+130.9105/+32.6097+130.9000/+32.6000+130.8891/+32.5940+130.8800/+32.5819+130.8600/+32.5800+130.8572/+32.5600+130.8400/+32.5400+130.8216/+32.5384+130.8200/+32.5204+130.8000/+32.5200+130.7995/+32.5035+130.7800/+32.5000+130.7740/+32.4876+130.7600/+32.4864+130.7400/+32.5000+130.7282/+32.5200+130.7366/+32.5291+130.7400/+32.5400+130.7426/+32.5600+130.7553/+32.5648+130.7600/+32.5800+130.7737/+32.5880+130.7800/+32.6000+130.7885/+32.6146+130.8000/+32.6200+130.8023/+32.6387+130.8200/+32.6400+130.8208/+32.6600+130.8320/+32.6708+130.8400/+32.6800+130.8462/+32.6901+130.8600/+32.7000+130.8680/+32.7127+130.8800/+32.7200+130.8855/+32.7361+130.9000/+32.7400+130.9024/+32.7570+130.9200/+32.7600+130.9223/+32.7777+130.9400/+32.7800+130.9415/+32.7984+130.9600/+32.8000+130.9612/+32.8184+130.9800/+32.8200+130.9812/+32.8387+131.0000/+32.8400+131.0009/+32.8591+131.0200/+32.8600+131.0205/+32.8795+131.0400/+32.8800+131.0401/+32.8999+131.0600/+32.9000+131.0627/+32.9173+131.0800/ 南西 50 熊本県八代市 4320200 熊本県宇城市 4321300 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県甲佐町 4344400 熊本県山都町 4344700 小さな噴石の落下 75 1 +32.8880+131.0600/+32.8988+131.0800/+32.8800+131.0988/+32.8600+131.0848/+32.8550+131.0800/+32.8517+131.0600/+32.8600+131.0514/+32.8800+131.0520/+32.8880+131.0600/ 南西 4 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T12:00:00+09:00 2026-09-20T15:00:00+09:00 降灰 70 +32.9177+131.0800/+32.9080+131.1000/+32.9000+131.1080/+32.8800+131.1195/+32.8600+131.1095/+32.8505+131.1000/+32.8400+131.0997/+32.8200+131.0949/+32.8043+131.0800/+32.8000+131.0793/+32.7800+131.0739/+32.7641+131.0600/+32.7600+131.0580/+32.7400+131.0434/+32.7356+131.0400/+32.7200+131.0294/+32.7102+131.0200/+32.7000+131.0115/+32.6832+131.0000/+32.6800+130.9978/+32.6600+130.9840/+32.6542+130.9800/+32.6400+130.9714/+32.6213+130.9600/+32.6200+130.9592/+32.6056+130.9400/+32.6000+130.9351/+32.5879+130.9200/+32.5800+130.9029/+32.5719+130.9000/+32.5600+130.8952/+32.5435+130.8800/+32.5400+130.8760/+32.5252+130.8600/+32.5200+130.8547/+32.5003+130.8400/+32.5000+130.8391/+32.4891+130.8200/+32.4800+130.8093/+32.4686+130.8000/+32.4800+130.7924/+32.5000+130.7845/+32.5200+130.7843/+32.5400+130.7939/+32.5500+130.8000/+32.5600+130.8035/+32.5800+130.8123/+32.5966+130.8200/+32.6000+130.8214/+32.6200+130.8350/+32.6259+130.8400/+32.6400+130.8512/+32.6523+130.8600/+32.6600+130.8666/+32.6697+130.8800/+32.6800+130.8956/+32.6845+130.9000/+32.7000+130.9051/+32.7154+130.9200/+32.7200+130.9238/+32.7390+130.9400/+32.7400+130.9404/+32.7600+130.9511/+32.7686+130.9600/+32.7800+130.9667/+32.7932+130.9800/+32.8000+130.9831/+32.8173+131.0000/+32.8200+131.0012/+32.8389+131.0200/+32.8400+131.0203/+32.8600+131.0305/+32.8695+131.0400/+32.8800+131.0402/+32.8998+131.0600/+32.9000+131.0623/+32.9177+131.0800/ 南西 50 熊本県八代市 4320200 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県西原村 4343200 熊本県南阿蘇村 4343300 熊本県御船町 4344100 熊本県甲佐町 4344400 熊本県山都町 4344700 熊本県五木村 4351100 小さな噴石の落下 75 1 +32.8839+131.0600/+32.8988+131.0800/+32.8800+131.0988/+32.8600+131.0857/+32.8536+131.0800/+32.8579+131.0600/+32.8600+131.0584/+32.8800+131.0561/+32.8839+131.0600/ 南西 4 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T15:00:00+09:00 2026-09-20T18:00:00+09:00 降灰 70 +32.9171+131.0800/+32.9059+131.1000/+32.9000+131.1059/+32.8800+131.1195/+32.8600+131.1146/+32.8454+131.1000/+32.8400+131.0999/+32.8200+131.0988/+32.8000+131.0879/+32.7906+131.0800/+32.7800+131.0791/+32.7600+131.0752/+32.7400+131.0607/+32.7389+131.0600/+32.7200+131.0545/+32.7000+131.0456/+32.6848+131.0400/+32.6800+131.0392/+32.6600+131.0350/+32.6400+131.0250/+32.6200+131.0216/+32.6178+131.0200/+32.6000+131.0002/+32.5998+131.0000/+32.5800+130.9822/+32.5761+130.9800/+32.5600+130.9689/+32.5469+130.9600/+32.5400+130.9538/+32.5298+130.9400/+32.5204+130.9200/+32.5223+130.9000/+32.5364+130.8800/+32.5400+130.8789/+32.5600+130.8741/+32.5672+130.8800/+32.5800+130.8830/+32.6000+130.8884/+32.6200+130.8968/+32.6245+130.9000/+32.6400+130.9069/+32.6515+130.9200/+32.6600+130.9296/+32.6730+130.9400/+32.6800+130.9426/+32.7000+130.9508/+32.7120+130.9600/+32.7200+130.9623/+32.7400+130.9682/+32.7542+130.9800/+32.7600+130.9812/+32.7800+130.9873/+32.7933+131.0000/+32.8000+131.0012/+32.8200+131.0170/+32.8230+131.0200/+32.8400+131.0213/+32.8589+131.0400/+32.8600+131.0401/+32.8800+131.0404/+32.8996+131.0600/+32.9000+131.0629/+32.9171+131.0800/ 南 40 熊本県八代市 4320200 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県南阿蘇村 4343300 熊本県山都町 4344700 小さな噴石の落下 75 1 +32.8988+131.0800/+32.8800+131.0988/+32.8600+131.0858/+32.8535+131.0800/+32.8600+131.0651/+32.8800+131.0603/+32.8988+131.0800/ 南 3 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 2026-09-20T18:00:00+09:00 2026-09-20T21:00:00+09:00 降灰 70 +32.9148+131.0800/+32.9000+131.0977/+32.8997+131.1000/+32.8800+131.1192/+32.8600+131.1147/+32.8453+131.1000/+32.8400+131.0999/+32.8200+131.0995/+32.8000+131.0979/+32.7800+131.0930/+32.7600+131.0800/+32.7400+131.0739/+32.7217+131.0600/+32.7200+131.0585/+32.7000+131.0530/+32.6834+131.0400/+32.6800+131.0384/+32.6600+131.0218/+32.6582+131.0200/+32.6400+131.0069/+32.6272+131.0000/+32.6200+130.9973/+32.6014+130.9800/+32.6000+130.9785/+32.5873+130.9600/+32.5807+130.9400/+32.5800+130.9388/+32.5600+130.9263/+32.5513+130.9200/+32.5400+130.9092/+32.5305+130.9000/+32.5200+130.8867/+32.5095+130.8800/+32.5000+130.8687/+32.4896+130.8600/+32.4800+130.8469/+32.4726+130.8400/+32.4800+130.8335/+32.5000+130.8202/+32.5037+130.8200/+32.5200+130.8195/+32.5217+130.8200/+32.5400+130.8253/+32.5600+130.8302/+32.5720+130.8400/+32.5800+130.8433/+32.6000+130.8554/+32.6057+130.8600/+32.6200+130.8713/+32.6263+130.8800/+32.6400+130.8881/+32.6585+130.9000/+32.6600+130.9035/+32.6674+130.9200/+32.6800+130.9259/+32.6960+130.9400/+32.7000+130.9418/+32.7200+130.9508/+32.7296+130.9600/+32.7400+130.9631/+32.7600+130.9737/+32.7665+130.9800/+32.7800+130.9832/+32.7978+131.0000/+32.8000+131.0005/+32.8200+131.0100/+32.8300+131.0200/+32.8400+131.0210/+32.8591+131.0400/+32.8600+131.0401/+32.8800+131.0403/+32.8996+131.0600/+32.9000+131.0652/+32.9148+131.0800/ 南西 50 熊本県八代市 4320200 熊本県阿蘇市 4321400 熊本県美里町 4334800 熊本県高森町 4342800 熊本県南阿蘇村 4343300 熊本県山都町 4344700 熊本県五木村 4351100 小さな噴石の落下 75 1 +32.8808+131.0600/+32.8988+131.0800/+32.8800+131.0988/+32.8600+131.0888/+32.8498+131.0800/+32.8595+131.0600/+32.8600+131.0597/+32.8800+131.0592/+32.8808+131.0600/ 南西 4 熊本県阿蘇市 4321400 熊本県南阿蘇村 4343300 　現在、阿蘇山は噴火警戒レベル２（火口周辺規制）です。阿蘇山で噴火が発生した場合には、２０日０９時から１２時までは火口から南西方向に降灰が予想されます。 　２０日３時から２０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 　２０日０３時から０６時まで　南西　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　２０日０６時から０９時まで　南西　　　　　　６０ｋｍ　　４ｋｍ　　　　　 　２０日０９時から１２時まで　南西　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　２０日１２時から１５時まで　南西　　　　　　５０ｋｍ　　４ｋｍ　　　　　 　２０日１５時から１８時まで　南　　　　　　　４０ｋｍ　　３ｋｍ　　　　　 　２０日１８時から２１時まで　南西　　　　　　５０ｋｍ　　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。 　熊本県　：熊本市、八代市、宇城市、阿蘇市、美里町、高森町、西原村、南阿蘇村、御船町、益城町、 　　　　　甲佐町、山都町、氷川町、五木村 　 　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。