2026-08-17T11:00:00Z 通常 気象庁本庁 気象庁 2026-08-17T20:00:00+09:00 2026-08-17T21:00:00+09:00 2026-08-18T15:00:00+09:00 105 発表 1 降灰予報 1.1_0 　現在、雌阿寒岳は噴火警戒レベル２（火口周辺規制）です。雌阿寒岳で噴火が発生した場合には、１７日２１時から２４時までは火口から北東方向、１８日０９時から１２時までは火口から北東方向に降灰が予想されます。 降灰予報（定時） 06 雌阿寒岳 105 降灰 70 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道小清水町 0154700 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 降灰予報（定時） 06 雌阿寒岳 105 +4323.18+14400.52+1499/ 降灰 70 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道小清水町 0154700 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-17T21:00:00+09:00 2026-08-18T00:00:00+09:00 降灰 70 +43.6092+144.1800/+43.6000+144.1979/+43.5994+144.2000/+43.5944+144.2200/+43.5800+144.2348/+43.5600+144.2325/+43.5400+144.2346/+43.5251+144.2200/+43.5200+144.2163/+43.5026+144.2000/+43.5000+144.1979/+43.4855+144.1800/+43.4800+144.1736/+43.4682+144.1600/+43.4604+144.1400/+43.4600+144.1393/+43.4433+144.1200/+43.4400+144.1151/+43.4255+144.1000/+43.4200+144.0937/+43.4065+144.0800/+43.4000+144.0692/+43.3908+144.0600/+43.3800+144.0568/+43.3632+144.0400/+43.3601+144.0200/+43.3601+144.0000/+43.3800+143.9801/+43.4000+143.9801/+43.4199+144.0000/+43.4200+144.0001/+43.4400+144.0050/+43.4556+144.0200/+43.4600+144.0220/+43.4799+144.0400/+43.4800+144.0400/+43.5000+144.0456/+43.5174+144.0600/+43.5200+144.0623/+43.5400+144.0799/+43.5401+144.0800/+43.5583+144.1000/+43.5600+144.1033/+43.5751+144.1200/+43.5800+144.1312/+43.5880+144.1400/+43.5994+144.1600/+43.6000+144.1628/+43.6092+144.1800/ 北東 30 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4169+144.0000/+43.4166+144.0200/+43.4000+144.0367/+43.3800+144.0388/+43.3612+144.0200/+43.3612+144.0000/+43.3800+143.9812/+43.4000+143.9831/+43.4169+144.0000/ 北 2 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-18T00:00:00+09:00 2026-08-18T03:00:00+09:00 降灰 70 +43.6803+144.1800/+43.6800+144.1840/+43.6787+144.2000/+43.6600+144.2136/+43.6400+144.2175/+43.6200+144.2173/+43.6000+144.2049/+43.5858+144.2000/+43.5800+144.1991/+43.5600+144.1876/+43.5440+144.1800/+43.5400+144.1794/+43.5200+144.1673/+43.5119+144.1600/+43.5000+144.1523/+43.4892+144.1400/+43.4800+144.1317/+43.4686+144.1200/+43.4600+144.1123/+43.4480+144.1000/+43.4400+144.0961/+43.4240+144.0800/+43.4200+144.0785/+43.4015+144.0600/+43.4000+144.0599/+43.3801+144.0400/+43.3800+144.0399/+43.3601+144.0200/+43.3601+144.0000/+43.3800+143.9801/+43.4000+143.9801/+43.4200+144.0000/+43.4400+144.0011/+43.4593+144.0200/+43.4600+144.0203/+43.4800+144.0258/+43.4968+144.0400/+43.5000+144.0408/+43.5200+144.0476/+43.5383+144.0600/+43.5400+144.0607/+43.5600+144.0732/+43.5702+144.0800/+43.5800+144.0850/+43.5989+144.1000/+43.6000+144.1012/+43.6200+144.1079/+43.6364+144.1200/+43.6400+144.1241/+43.6586+144.1400/+43.6600+144.1420/+43.6737+144.1600/+43.6800+144.1793/+43.6803+144.1800/ 北東 40 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道足寄町 0164700 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4173+144.0000/+43.4177+144.0200/+43.4000+144.0376/+43.3800+144.0388/+43.3612+144.0200/+43.3612+144.0000/+43.3800+143.9812/+43.4000+143.9827/+43.4173+144.0000/ 北 2 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-18T03:00:00+09:00 2026-08-18T06:00:00+09:00 降灰 70 +43.7467+144.2400/+43.7400+144.2502/+43.7318+144.2600/+43.7200+144.2710/+43.7000+144.2777/+43.6915+144.2800/+43.6800+144.2835/+43.6689+144.2800/+43.6600+144.2785/+43.6400+144.2732/+43.6200+144.2616/+43.6183+144.2600/+43.6000+144.2513/+43.5891+144.2400/+43.5800+144.2313/+43.5692+144.2200/+43.5600+144.2127/+43.5454+144.2000/+43.5400+144.1960/+43.5257+144.1800/+43.5200+144.1760/+43.5042+144.1600/+43.5000+144.1570/+43.4834+144.1400/+43.4800+144.1369/+43.4633+144.1200/+43.4600+144.1172/+43.4429+144.1000/+43.4400+144.0986/+43.4215+144.0800/+43.4200+144.0794/+43.4006+144.0600/+43.4000+144.0599/+43.3801+144.0400/+43.3800+144.0399/+43.3601+144.0200/+43.3603+144.0000/+43.3800+143.9803/+43.4000+143.9802/+43.4198+144.0000/+43.4200+144.0000/+43.4400+144.0021/+43.4579+144.0200/+43.4600+144.0209/+43.4795+144.0400/+43.4800+144.0404/+43.5000+144.0487/+43.5117+144.0600/+43.5200+144.0638/+43.5372+144.0800/+43.5400+144.0826/+43.5593+144.1000/+43.5600+144.1007/+43.5800+144.1188/+43.5818+144.1200/+43.6000+144.1264/+43.6170+144.1400/+43.6200+144.1419/+43.6400+144.1456/+43.6600+144.1568/+43.6656+144.1600/+43.6800+144.1702/+43.6988+144.1800/+43.7000+144.1808/+43.7200+144.1971/+43.7237+144.2000/+43.7358+144.2200/+43.7400+144.2274/+43.7467+144.2400/ 北東 40 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4172+144.0000/+43.4194+144.0200/+43.4000+144.0395/+43.3800+144.0388/+43.3612+144.0200/+43.3612+144.0000/+43.3800+143.9812/+43.4000+143.9828/+43.4172+144.0000/ 北 2 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-18T06:00:00+09:00 2026-08-18T09:00:00+09:00 降灰 70 +43.8251+144.2600/+43.8201+144.2800/+43.8200+144.2802/+43.8000+144.2937/+43.7800+144.2932/+43.7600+144.2911/+43.7400+144.2820/+43.7364+144.2800/+43.7200+144.2762/+43.7000+144.2702/+43.6883+144.2600/+43.6800+144.2559/+43.6600+144.2510/+43.6400+144.2434/+43.6343+144.2400/+43.6200+144.2339/+43.6061+144.2200/+43.6000+144.2135/+43.5865+144.2000/+43.5800+144.1970/+43.5600+144.1835/+43.5560+144.1800/+43.5400+144.1726/+43.5271+144.1600/+43.5200+144.1552/+43.5047+144.1400/+43.5000+144.1380/+43.4818+144.1200/+43.4800+144.1189/+43.4609+144.1000/+43.4600+144.0997/+43.4400+144.0881/+43.4318+144.0800/+43.4200+144.0777/+43.4023+144.0600/+43.4000+144.0598/+43.3802+144.0400/+43.3800+144.0398/+43.3602+144.0200/+43.3606+144.0000/+43.3800+143.9806/+43.4000+143.9803/+43.4200+144.0000/+43.4400+144.0004/+43.4597+144.0200/+43.4600+144.0202/+43.4800+144.0229/+43.4976+144.0400/+43.5000+144.0409/+43.5200+144.0522/+43.5285+144.0600/+43.5400+144.0635/+43.5586+144.0800/+43.5600+144.0810/+43.5800+144.0884/+43.5944+144.1000/+43.6000+144.1024/+43.6200+144.1102/+43.6329+144.1200/+43.6400+144.1236/+43.6600+144.1290/+43.6711+144.1400/+43.6800+144.1443/+43.7000+144.1497/+43.7200+144.1592/+43.7217+144.1600/+43.7400+144.1699/+43.7543+144.1800/+43.7600+144.1858/+43.7774+144.2000/+43.7800+144.2034/+43.7951+144.2200/+43.8000+144.2245/+43.8169+144.2400/+43.8200+144.2503/+43.8251+144.2600/ 北東 50 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4198+144.0200/+43.4000+144.0398/+43.3800+144.0388/+43.3612+144.0200/+43.3612+144.0000/+43.3800+143.9812/+43.3988+144.0000/+43.4000+144.0012/+43.4198+144.0200/ 東 2 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-18T09:00:00+09:00 2026-08-18T12:00:00+09:00 降灰 70 +43.8245+144.3000/+43.8200+144.3057/+43.8000+144.3133/+43.7800+144.3178/+43.7650+144.3200/+43.7600+144.3206/+43.7588+144.3200/+43.7400+144.3142/+43.7200+144.3103/+43.7000+144.3037/+43.6905+144.3000/+43.6800+144.2955/+43.6600+144.2801/+43.6599+144.2800/+43.6400+144.2674/+43.6329+144.2600/+43.6200+144.2550/+43.6000+144.2459/+43.5944+144.2400/+43.5825+144.2200/+43.5800+144.2183/+43.5600+144.2018/+43.5579+144.2000/+43.5400+144.1867/+43.5341+144.1800/+43.5200+144.1699/+43.5102+144.1600/+43.5000+144.1513/+43.4889+144.1400/+43.4800+144.1326/+43.4676+144.1200/+43.4600+144.1140/+43.4460+144.1000/+43.4400+144.0974/+43.4226+144.0800/+43.4200+144.0792/+43.4007+144.0600/+43.4000+144.0599/+43.3800+144.0448/+43.3752+144.0400/+43.3602+144.0200/+43.3608+144.0000/+43.3800+143.9808/+43.4000+143.9804/+43.4198+144.0000/+43.4200+144.0000/+43.4400+144.0008/+43.4593+144.0200/+43.4600+144.0203/+43.4800+144.0243/+43.4962+144.0400/+43.5000+144.0416/+43.5200+144.0570/+43.5233+144.0600/+43.5400+144.0671/+43.5537+144.0800/+43.5600+144.0846/+43.5800+144.0969/+43.5842+144.1000/+43.6000+144.1105/+43.6111+144.1200/+43.6200+144.1267/+43.6400+144.1361/+43.6449+144.1400/+43.6600+144.1481/+43.6763+144.1600/+43.6800+144.1631/+43.7000+144.1725/+43.7110+144.1800/+43.7200+144.1866/+43.7400+144.1978/+43.7423+144.2000/+43.7600+144.2131/+43.7711+144.2200/+43.7800+144.2272/+43.7916+144.2400/+43.8000+144.2579/+43.8019+144.2600/+43.8094+144.2800/+43.8200+144.2956/+43.8245+144.3000/ 北東 50 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4197+144.0200/+43.4068+144.0400/+43.4000+144.0421/+43.3979+144.0400/+43.3800+144.0388/+43.3612+144.0200/+43.3800+144.0012/+43.4000+144.0012/+43.4197+144.0200/ 北東 3 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 2026-08-18T12:00:00+09:00 2026-08-18T15:00:00+09:00 降灰 70 +43.7677+144.3200/+43.7738+144.3400/+43.7720+144.3600/+43.7600+144.3681/+43.7400+144.3704/+43.7200+144.3681/+43.7113+144.3600/+43.7000+144.3535/+43.6800+144.3457/+43.6705+144.3400/+43.6601+144.3200/+43.6600+144.3199/+43.6400+144.3038/+43.6358+144.3000/+43.6200+144.2854/+43.6116+144.2800/+43.6000+144.2720/+43.5923+144.2600/+43.5800+144.2495/+43.5699+144.2400/+43.5600+144.2288/+43.5520+144.2200/+43.5400+144.2067/+43.5323+144.2000/+43.5200+144.1889/+43.5120+144.1800/+43.5004+144.1600/+43.5000+144.1596/+43.4807+144.1400/+43.4800+144.1392/+43.4610+144.1200/+43.4600+144.1190/+43.4412+144.1000/+43.4400+144.0993/+43.4208+144.0800/+43.4200+144.0797/+43.4004+144.0600/+43.4000+144.0599/+43.3800+144.0499/+43.3701+144.0400/+43.3602+144.0200/+43.3605+144.0000/+43.3800+143.9805/+43.4000+143.9803/+43.4197+144.0000/+43.4200+144.0001/+43.4400+144.0023/+43.4578+144.0200/+43.4600+144.0209/+43.4795+144.0400/+43.4800+144.0404/+43.5000+144.0512/+43.5091+144.0600/+43.5200+144.0661/+43.5344+144.0800/+43.5400+144.0853/+43.5562+144.1000/+43.5600+144.1037/+43.5770+144.1200/+43.5800+144.1230/+43.6000+144.1388/+43.6015+144.1400/+43.6200+144.1594/+43.6223+144.1600/+43.6400+144.1636/+43.6569+144.1800/+43.6600+144.1837/+43.6731+144.2000/+43.6800+144.2070/+43.7000+144.2195/+43.7007+144.2200/+43.7199+144.2400/+43.7200+144.2402/+43.7396+144.2600/+43.7400+144.2606/+43.7504+144.2800/+43.7564+144.3000/+43.7600+144.3098/+43.7677+144.3200/ 北東 50 北海道釧路市 0120600 北海道美幌町 0154300 北海道津別町 0154400 北海道小清水町 0154700 北海道大空町 0156400 北海道足寄町 0164700 北海道弟子屈町 0166500 北海道白糠町 0166800 小さな噴石の落下 75 1 +43.4194+144.0200/+43.4000+144.0399/+43.3800+144.0388/+43.3612+144.0200/+43.3632+144.0000/+43.3800+143.9832/+43.3968+144.0000/+43.4000+144.0012/+43.4194+144.0200/ 東 2 北海道釧路市 0120600 北海道足寄町 0164700 北海道白糠町 0166800 　現在、雌阿寒岳は噴火警戒レベル２（火口周辺規制）です。雌阿寒岳で噴火が発生した場合には、１７日２１時から２４時までは火口から北東方向、１８日０９時から１２時までは火口から北東方向に降灰が予想されます。 　１７日２１時から１８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 　１７日２１時から２４時まで　北東　　　　　　３０ｋｍ　　２ｋｍ　　　　　 　１８日００時から０３時まで　北東　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　１８日０３時から０６時まで　北東　　　　　　４０ｋｍ　　２ｋｍ　　　　　 　１８日０６時から０９時まで　北東　　　　　　５０ｋｍ　　２ｋｍ　　　　　 　１８日０９時から１２時まで　北東　　　　　　５０ｋｍ　　３ｋｍ　　　　　 　１８日１２時から１５時まで　北東　　　　　　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。 　北海道　：釧路市、足寄町、美幌町、津別町、弟子屈町、白糠町、大空町、小清水町 　 　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。