Study Of The Methods And Adaptability For Locating Deep Source Earthquake In Northeastern China

Heilongjiang province is in the northeastern part of the Eurasian plate arc area,it affected by the subduction of the Pacific plate,in the northeast of China,sometimes300-600 km deep source earthquake occured in the area.The seismic energy released is larger,It is called magnitude of earthquake.The range of sense is wide.These deep earthquakes is in the monitoring range of seismograph network in Heilongjiang Province,how to carry out the location of deep source earthquakes,It has become an urgent problem to determination the parameters of deep source earthquakes rapidly and accurately,How to select the optimal method to the localization of deep source earthquakes.The results of this study can help to study the geodynamic characteristics of Northeast China to some extent,it can provide some help for earthquake prevention and disaster reduction work in Northeast china.After the transformation project of the tenth five-year plan,It is mainly used for earthquake location program MSDP interactive software in JOPENS system with the commonly used software positioning method in the routine monitoring.There are methods,That is adaptive method,HYP2000,Hypo SAT,LOCSAT etc in the software,the epicentral distance is less than 1000 KM to deep earthquakes for the simple type adaptive method,HYP2000 method the depth calculation is not accurate for these methods,so positioning method to LOCSAT and Hypo SAT is more suitable for deep earthquakes in the region.the two positioning methods currently in use,which is more suitable for the Heilongjiang seismic network recorded deep seismic processing,it can effectively improve the quality and speed of positioning and seismic network of deep earthquakes measured in Heilongjiang province.This paper selects seismic waveform data of the area from Muling(in Heilongjiang province)to Wangqing(in Jilin province)which extent of the study area is between latitudes 41°N-46°N and longitudes 128° E-131°E.The time interval is from January 2008 to December 2016.LOCSAT and Hypo SAT methods are used to locate these earthquake in Heilongjiang province seismic network.The results arecompared the catalog of Chinese seismic network.This paper analyze the result for the differences,give suitable location method for the recorded of deep source earthquakes in northeastern China areaThe results show that the Hypo SAT method is more accurate than the LOCSAT positioning method in the Northeast deep seismic records of the seismological network of Heilongjiang province.