Application and Test of ECRS Earthquake Anomaly Analysis Method in Beijing Area
LI Hong
DENG Zhihui
XUNG Chenqi
ZHU Hongbin
YUE Xiaoyuan
WU Minjie
Abstract：ECRS (earthquake corresponding relevancy spectrum)method is one of concerned recognition methods of seismic anomalies in recent years. This paper analyzes the single and multi-parameter sliding extreme average relevancy spectrum of Beijing area by using ECRS method. The effectiveness of this method is evaluated preliminarily through the example analysis, extrapolation and comparing with the actual occurrence of earthquake. The results show that for the target earthquake with M≥4, when the inspection period is 12 months, single-parameter corresponding relevancy spectrum such as of b value, lack of earthquake has a certain ability to recognize seismic precursory anomaly of Beijing area; multi -parameter earthquake corresponding relevancy spectrum can identify earthquakes comprehensive precursory anomalies better in Beijing area comparing with single-parameter. The anomalies corresponding proportion and earthquake corresponding proportion are 7/8 and 9/11 respectively with the high abnormal reliability; taking high probability of 0.5 times the standard deviation of the mean value as the anomaly threshold, it can identify earthquake precursory comprehensive anomaly better, but will be affected in a certain extent by human factors.
Keywords：ECRS methodPrecursory anomalyb valueLack of earthquakeBeijing area
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：9( 1-9 )