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1、.EarthquakeAn earthquake is the result of a sudden release of energy in the Earths crust that creates seismic waves（地震波）. Earthquakes are recorded with a seismometer（地震检波器）, also known as a seismograph（地震仪）. The moment magnitude of an earthquake is conventionally reported, or the related and mostly
2、obsolete Richter magnitude(里氏量级）, with magnitude 3 or lower earthquakes being mostly imperceptible 感觉不到的 and magnitude 7 causing serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale（麦加利震级, 麦氏震级）.At the Earths surface, earthquakes manifest themselves by a s
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