WWSSNWorld-Wide Standardized Seismograph Network
WWSSNWorld Wide Standard Seismic Network
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References in periodicals archive ?
Earthquake catalog prepared by National Earthquake Information Centre (NEIC) of e US Geological Survey was found very reliable and complete for magnitude Mgreater than4.0 from 1964 onward , when the World Wide Seismic Station Network (WWSSN) of (USGS) became operational.