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1820年,美国华盛顿州面积第一小的艾兰县的卡马诺岛发生山体滑坡,巨大的石块以极快的速度掉进帽子岛附近的海域。掀起的惊涛骇浪有4米高,摧毁了附近哈特岛居民的家园,许多人被洪水淹死。艾兰县的总面积为1340平方公里,其中陆地面积540平方公里,剩下的水域面积占59.7%,为800平方公里。
In 1820, a landslide occurred on Camano Island, the largest area in the state of Washington in the state of Ilan County, where huge stones dropped into the sea near Hatsune Island at an extremely rapid rate. The stormy sea was set at 4 meters high, destroying the homes of nearby Hut residents and many were drowned in floodwaters. The total area of Ayland County is 1,340 square kilometers, of which 540 square kilometers of land area, the remaining area of 59.7% of the water area to 800 square kilometers.