唐山地区波速比变化特征研究  

Change Characteristics of Wave Velocity Ratio in Tangshan Area

作　　者：王亚茹[1] 宋昭[1] 刘晓丹[1] 郭蕾[1] 王妍[1] 王时 宫猛[1] 王想[1] WANG Yaru;SONG Zhao;LIU Xiaodan;GUO Lei;WANG Yan;WANG Shi;GONG Meng;WANG Xiang(Hebei Earthquake Agency,262 Huaizhong Road,Shijiazhuang 050021,China)

机构地区：[1]河北省地震局

出　　处：《大地测量与地球动力学》2019年第7期686-690,共5页Journal of Geodesy and Geodynamics

基　　金：河北省地震科技星火计划(DZ20190416005,DZ20170508026,DZ20170109002);中国地震局地震科技星火计划(XH18008Y,XH17007)~~

摘　　要：选取唐山地区2008~2018年震相数据,利用单台多震和达法和多台多震和达法分别计算波速比,结合研究区内的地震活动对波速比的变化特征进行研究。结果显示,多台多震和达法得到的波速比结果较为稳定,而单台多震和达法得到的结果变化幅度大,显示更多细节;唐山地区ML≥4.5地震发生前单台波速比存在不同程度的异常,异常台站的方位与地震具有一定的对应性。We select the seismic phase reports of Tangshan region by Hebei digital seismic network from 2008 to 2018 and calculate the wave velocity ratio by multi station-multi earthquake method and single station-multi earthquake method.We then analyze the characteristics of wave velocity ratio change combined with seismic activity.The results show that using the velocity ratio by multi station-multi earthquake method is more stable,but the results by the single station-multi earthquake method show more detail,and low value anomaly appears in varying degrees before M L≥4.5 earthquakes in the Tangshan region.The locations of abnormal stations correspond to earthquakes,to some extent.

关 键 词：唐山 地震 波速比 台站 

分 类 号：P315[天文地球—地震学]