Recognization of Repeating Earthquakes and Its Application in Network Location Evaluationin in Guangdong Province
MA Xiaojing
LYU Zuoyong
Abstract：According to the complete magnitude analysis,the paper selects 3 969 earthquakes with magnitude larger than 0 from Jan 2010 to Oct 2013 in Guangdong Province and does the waveform cross-correlated analysis.Two events with correlation coefficient larger than 0.8 in no less than 3 stations' vertical waveforms are regarded as a repeat event pair,and 1 612 repeating events are recognized,being 41％ of the whole events.According to the research result that the distance of a repeat pair is about a quarter of the dominant wavelength,seismic phase picking error and location accuracy is quantitatively evaluated.It is observed that 80％ of the phase picking errors are within 0.3 sec,70％ within 0.2 sec and 40％ within 0.1 sec.The location error is smaller in the inland area than coast area,which is related to the dense and even distribution of seismic stations.
Keywords：Repeating earthquakeWaveform correlationPhase picking errorPositioning evaluationSeismic network
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 22-28 )