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Paricutín 火山卫星地图 (世界奇迹指南)

http://en.wikipedia.org/wiki/Paricutin_Volcano Paricutín is a volcano in the Mexican state of Michoacán, close to the village of the same name. It appears on many versions of the Seven Natural Wonders of the World list, although none of these lists are by any means authoritative. Prior to 1943, this volcano did not exist. During the first several weeks of that year a number of strange thunderings were heard by the inhabitants in and around the small village of Paricutín, in spite of clear weather. These turned out to be caused by tremors occurring deep beneath the village. Seismic activity intensified until 20 February, when local farmer Dioniso Pulido witnessed the opening of a volcanic fissure in the middle of his cornfield. According to some accounts, villagers attempted to close the fissures by filling them with rocks and soil before small explosions and violent tremors began to shake the area. The residents of the nearby villages fled as pyroclastic activity began that day, and within 24 hours of the initial fissure the volcano had already built into a 50 meter high cone. Within a week this height had doubled.