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teleseism
A teleseism is a tremor caused by an earthquake that is very far away. According to the USGS, the term ''teleseismic'' refers to earthquakes that occur more than 1000 km from the measurement site. Often teleseismic events can be picked up only by seismometers that are in low background noise locations; whereas, in general, a tremor of a magnitude 5.3 earthquake can be seen anywhere in the world with modern seismic instruments. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「teleseism」の詳細全文を読む
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