2026-08-17T17:00:00Z 通常 気象庁本庁 気象庁 2026-08-18T02:00:00+09:00 2026-08-18T03:00:00+09:00 2026-08-18T21:00:00+09:00 207 発表 1 降灰予報 1.1_0 　現在、岩手山は噴火警戒レベル２（火口周辺規制）です。岩手山で噴火が発生した場合には、１８日０９時から１２時までは火口から北方向に降灰が予想されます。 降灰予報（定時） 06 岩手山 207 降灰 70 岩手県二戸市 0321300 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 岩手県一戸町 0352400 小さな噴石の落下 75 岩手県八幡平市 0321400 岩手県雫石町 0330100 降灰予報（定時） 06 岩手山 207 +3951.15+14100.07+2038/ 降灰 70 岩手県二戸市 0321300 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 岩手県一戸町 0352400 小さな噴石の落下 75 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T03:00:00+09:00 2026-08-18T06:00:00+09:00 降灰 70 +40.1018+141.1800/+40.1028+141.2000/+40.1000+141.2070/+40.0935+141.2200/+40.0800+141.2362/+40.0600+141.2284/+40.0529+141.2200/+40.0400+141.2096/+40.0338+141.2000/+40.0200+141.1842/+40.0167+141.1800/+40.0101+141.1600/+40.0000+141.1482/+39.9927+141.1400/+39.9800+141.1297/+39.9689+141.1200/+39.9600+141.1131/+39.9463+141.1000/+39.9400+141.0980/+39.9200+141.0837/+39.9157+141.0800/+39.9000+141.0737/+39.8845+141.0600/+39.8800+141.0585/+39.8623+141.0400/+39.8600+141.0385/+39.8417+141.0200/+39.8400+141.0188/+39.8212+141.0000/+39.8201+140.9800/+39.8204+140.9600/+39.8400+140.9404/+39.8600+140.9402/+39.8800+140.9573/+39.8827+140.9600/+39.9000+140.9627/+39.9174+140.9800/+39.9200+140.9820/+39.9400+140.9931/+39.9475+141.0000/+39.9600+141.0033/+39.9800+141.0084/+40.0000+141.0170/+40.0052+141.0200/+40.0200+141.0263/+40.0395+141.0400/+40.0400+141.0406/+40.0600+141.0592/+40.0610+141.0600/+40.0698+141.0800/+40.0800+141.0893/+40.0864+141.1000/+40.0936+141.1200/+40.0957+141.1400/+40.0996+141.1600/+40.1000+141.1643/+40.1018+141.1800/ 北東 30 岩手県二戸市 0321300 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 岩手県一戸町 0352400 小さな噴石の落下 75 1 +39.8790+140.9800/+39.8600+140.9991/+39.8400+140.9990/+39.8213+140.9800/+39.8400+140.9612/+39.8600+140.9612/+39.8790+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T06:00:00+09:00 2026-08-18T09:00:00+09:00 降灰 70 +40.0641+141.1000/+40.0600+141.1138/+40.0588+141.1200/+40.0569+141.1400/+40.0593+141.1600/+40.0486+141.1800/+40.0400+141.1852/+40.0332+141.1800/+40.0200+141.1608/+40.0196+141.1600/+40.0000+141.1458/+39.9909+141.1400/+39.9800+141.1349/+39.9600+141.1233/+39.9571+141.1200/+39.9401+141.1000/+39.9400+141.1000/+39.9200+141.0936/+39.9026+141.0800/+39.9000+141.0788/+39.8800+141.0686/+39.8715+141.0600/+39.8605+141.0400/+39.8600+141.0397/+39.8411+141.0200/+39.8400+141.0189/+39.8212+141.0000/+39.8200+140.9800/+39.8202+140.9600/+39.8400+140.9402/+39.8600+140.9401/+39.8800+140.9530/+39.8870+140.9600/+39.9000+140.9656/+39.9155+140.9800/+39.9200+140.9824/+39.9400+140.9905/+39.9529+141.0000/+39.9600+141.0024/+39.9800+141.0046/+40.0000+141.0188/+40.0021+141.0200/+40.0200+141.0307/+40.0276+141.0400/+40.0369+141.0600/+40.0400+141.0648/+40.0524+141.0800/+40.0600+141.0950/+40.0641+141.1000/ 北東 30 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 小さな噴石の落下 75 1 +39.8789+140.9800/+39.8600+140.9991/+39.8400+140.9990/+39.8214+140.9800/+39.8400+140.9614/+39.8600+140.9612/+39.8789+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T09:00:00+09:00 2026-08-18T12:00:00+09:00 降灰 70 +40.0631+141.0000/+40.0600+141.0063/+40.0574+141.0200/+40.0594+141.0400/+40.0475+141.0600/+40.0400+141.0658/+40.0200+141.0734/+40.0000+141.0757/+39.9800+141.0756/+39.9600+141.0695/+39.9440+141.0600/+39.9400+141.0593/+39.9200+141.0563/+39.9000+141.0439/+39.8956+141.0400/+39.8800+141.0381/+39.8616+141.0200/+39.8600+141.0198/+39.8401+141.0000/+39.8400+141.0000/+39.8201+140.9800/+39.8202+140.9600/+39.8400+140.9402/+39.8600+140.9400/+39.8800+140.9408/+39.9000+140.9569/+39.9069+140.9600/+39.9200+140.9604/+39.9400+140.9610/+39.9600+140.9609/+39.9800+140.9617/+40.0000+140.9619/+40.0200+140.9625/+40.0400+140.9717/+40.0528+140.9800/+40.0600+140.9944/+40.0631+141.0000/ 北 20 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 小さな噴石の落下 75 1 +39.8789+140.9800/+39.8600+140.9990/+39.8400+140.9985/+39.8215+140.9800/+39.8400+140.9615/+39.8600+140.9612/+39.8789+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T12:00:00+09:00 2026-08-18T15:00:00+09:00 降灰 70 +40.0624+141.1000/+40.0652+141.1200/+40.0600+141.1244/+40.0400+141.1238/+40.0200+141.1305/+40.0000+141.1201/+39.9999+141.1200/+39.9800+141.1097/+39.9671+141.1000/+39.9600+141.0969/+39.9400+141.0870/+39.9295+141.0800/+39.9200+141.0776/+39.9000+141.0659/+39.8932+141.0600/+39.8800+141.0574/+39.8625+141.0400/+39.8600+141.0385/+39.8421+141.0200/+39.8400+141.0183/+39.8217+141.0000/+39.8200+140.9800/+39.8202+140.9600/+39.8400+140.9402/+39.8600+140.9401/+39.8800+140.9479/+39.8922+140.9600/+39.9000+140.9624/+39.9200+140.9768/+39.9268+140.9800/+39.9400+140.9807/+39.9600+140.9823/+39.9800+140.9818/+40.0000+140.9862/+40.0200+140.9859/+40.0400+140.9928/+40.0491+141.0000/+40.0515+141.0200/+40.0580+141.0400/+40.0538+141.0600/+40.0541+141.0800/+40.0600+141.0945/+40.0624+141.1000/ 北東 30 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 小さな噴石の落下 75 1 +39.8789+140.9800/+39.8600+140.9990/+39.8400+140.9988/+39.8212+140.9800/+39.8400+140.9612/+39.8600+140.9612/+39.8789+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T15:00:00+09:00 2026-08-18T18:00:00+09:00 降灰 70 +40.0628+141.1000/+40.0600+141.1104/+40.0585+141.1200/+40.0570+141.1400/+40.0469+141.1600/+40.0424+141.1800/+40.0400+141.1825/+40.0378+141.1800/+40.0302+141.1600/+40.0200+141.1566/+40.0014+141.1400/+40.0000+141.1387/+39.9800+141.1285/+39.9715+141.1200/+39.9600+141.1136/+39.9443+141.1000/+39.9400+141.0985/+39.9200+141.0855/+39.9142+141.0800/+39.9000+141.0739/+39.8824+141.0600/+39.8800+141.0595/+39.8609+141.0400/+39.8600+141.0394/+39.8412+141.0200/+39.8400+141.0191/+39.8209+141.0000/+39.8200+140.9800/+39.8203+140.9600/+39.8400+140.9403/+39.8600+140.9401/+39.8799+140.9600/+39.8800+140.9601/+39.9000+140.9757/+39.9047+140.9800/+39.9200+140.9831/+39.9400+140.9883/+39.9600+140.9995/+39.9618+141.0000/+39.9800+141.0015/+40.0000+141.0065/+40.0163+141.0200/+40.0200+141.0252/+40.0399+141.0400/+40.0400+141.0402/+40.0475+141.0600/+40.0521+141.0800/+40.0600+141.0969/+40.0628+141.1000/ 北東 30 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 岩手県岩手町 0330300 小さな噴石の落下 75 1 +39.8789+140.9800/+39.8600+140.9991/+39.8400+140.9988/+39.8212+140.9800/+39.8400+140.9612/+39.8600+140.9612/+39.8789+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 2026-08-18T18:00:00+09:00 2026-08-18T21:00:00+09:00 降灰 70 +40.1633+141.0200/+40.1700+141.0400/+40.1671+141.0600/+40.1600+141.0666/+40.1400+141.0741/+40.1200+141.0710/+40.1000+141.0644/+40.0800+141.0721/+40.0600+141.0795/+40.0400+141.0783/+40.0200+141.0789/+40.0000+141.0754/+39.9800+141.0732/+39.9600+141.0671/+39.9510+141.0600/+39.9400+141.0578/+39.9200+141.0521/+39.9059+141.0400/+39.9000+141.0392/+39.8800+141.0344/+39.8656+141.0200/+39.8600+141.0196/+39.8401+141.0000/+39.8400+141.0000/+39.8201+140.9800/+39.8202+140.9600/+39.8400+140.9402/+39.8600+140.9401/+39.8800+140.9408/+39.8995+140.9600/+39.9000+140.9601/+39.9200+140.9613/+39.9400+140.9654/+39.9595+140.9800/+39.9600+140.9801/+39.9800+140.9807/+40.0000+140.9812/+40.0200+140.9800/+40.0400+140.9815/+40.0600+140.9809/+40.0800+140.9806/+40.1000+140.9829/+40.1200+140.9876/+40.1400+140.9948/+40.1462+141.0000/+40.1600+141.0154/+40.1633+141.0200/ 北 40 岩手県二戸市 0321300 岩手県八幡平市 0321400 岩手県滝沢市 0321600 岩手県雫石町 0330100 小さな噴石の落下 75 1 +39.8790+140.9800/+39.8600+140.9990/+39.8400+140.9933/+39.8267+140.9800/+39.8400+140.9667/+39.8600+140.9612/+39.8790+140.9800/ 東 1 岩手県八幡平市 0321400 岩手県雫石町 0330100 　現在、岩手山は噴火警戒レベル２（火口周辺規制）です。岩手山で噴火が発生した場合には、１８日０９時から１２時までは火口から北方向に降灰が予想されます。 　１８日３時から１８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 　１８日０３時から０６時まで　北東　　　　　　３０ｋｍ　　１ｋｍ　　　　　 　１８日０６時から０９時まで　北東　　　　　　３０ｋｍ　　１ｋｍ　　　　　 　１８日０９時から１２時まで　北　　　　　　　２０ｋｍ　　１ｋｍ　　　　　 　１８日１２時から１５時まで　北東　　　　　　３０ｋｍ　　１ｋｍ　　　　　 　１８日１５時から１８時まで　北東　　　　　　３０ｋｍ　　１ｋｍ　　　　　 　１８日１８時から２１時まで　北　　　　　　　４０ｋｍ　　１ｋｍ　　　　　 　 　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。 　岩手県　：八幡平市、二戸市、滝沢市、雫石町、岩手町、一戸町 　 　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。