乌兰浩特地震台典型地震事件震相特征分析

Analysis of seismic characteristics of Wulanhot seismic event

选取乌兰浩特地震台记录到的典型天然地震事件及爆破事件,根据断裂带分布及波形记录特征,分析地震及爆破事件的震相特征.结果表明,研究区域近震波形Pn、Pg、Sn、Sg震相及Sm面波较清晰,Pg、Sg波走时差一般不大于23 s,与中国地震台网中心发布的MS震级间的偏差一般小于0.6级;远震P、S、pP、sP震相可较清晰识别,Pm、L面波记录较明显,P、S波走时差一般不小于25 s,震级偏差一般小于0.4级,且通过震相特征及实地考察发现,爆破多为霍林郭勒区域爆破事件.

According to the typical natural seismic events and blasting events recorded by the Wulanhot Seismic Station,the seismic characteristics are summarized through analysis.The results show that the near seismic waveforms Pn,Pg,Sn,Sg and Sm surface waves in the study area are relatively clear.The travel time difference of Pg and Sg waves is generally less than 22 seconds,and the magnitude deviation from that issued by China Earthquake Administration is generally less than 0.6.Far earthquakes P,S,pP and sP are clearly identified,Pm and L surface wave records are obvious,P and S wave travel time difference is generally less than 25 seconds,magnitude deviation is generally less than 0.4 and blasting events are mostly Huolinguole regional blasting events through seismic phase characteristics and field investigation.This study provides effective reference data for the analysis of seismic events and blasting events at stations.which provides an effective reference material for the seismic events and blasting events analysis of the station.