１９９８年１１月９日日本气象通讯社发布了关于北海道岛上阿坎火山可能喷发的警告。因为在札幌以西２２５ｋｍ的阿坎湖岸上阿坎城的树和屋顶上出现了火山灰。就在那个早晨,地震仪记录到长达４分钟的一系列地下冲击。次日,飞机完成了环绕阿坎山峰（海拔１４９９ｍ）的飞行:在火 On November 9, 1998, Japan’s Meteorological Agency issued a warning about the possible eruption of Akan Volcano on the island of Hokkaido. Because volcanic ash appeared on the trees and roofs of the city of Acan at 225km west of Sapporo. Just that morning, the seismograph recorded a series of underground shocks lasting up to four minutes. The next day, the plane completed a flight around the mountain peak of Akan (1499m above sea level): on fire