网站名称：USArray
网址：http://www.usarray.org
网页标题：USArray
关键词：USArray,earthscope,experiment,nsf,iris,obser--tory,sei--ology,sei--ologicaldata,earthquake,earthquakes
简介：USArray, which is part of the EarthScope experiment, is a 15-year program to place a dense network of permanent and portable sei**ographs across the continental United States.
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