earthquakes
An earthquake is a shaking of the ground caused by movement of the Earth's crust.
the San Francisco earthquake of 1906.
1906年的旧金山地震。
Two powerful earthquakes struck western Japan yesterday.
昨天日本西部发生了两场强震。
Bhuj was hit by an earthquake measuring 7.9 on the Richter scale.
普杰发生了一场里氏7.9级的地震。