永登地震前后P波出射角和方位角的异常变化研究  

STUDY ON THE ANOMALY VARIATION OF P-WAVE EMERGENT ANGLE AND AZIMUTH BEFORE AND AFTER YONGDENG EARTHQUAKE

作　　者：尹志文[1] 许健生[1] 李发科[1] 

机构地区：[1]中国地震局兰州地震研究所观象台

出　　处：《高原地震》1998年第4期68-72,共5页Plateau Earthquake Research

摘　　要：给出了中国数字地震台网（ＣＤＳＮ）兰州台数字化地震记录在１９９５年７月２２日永登５．８级地震前后Ｐ波出射角与方位角的异常变化：主震前数月出射角出现明显上升异常变化，方位角出现明显下降异常变化。探讨了利用出射角和方位角异常进行大地震预报的可能途径和方法。The authors have analyzed the anomaly variation of P-wave emergent angle and azimuth before and after Yongdeng 5.8 earthquake on Jul.22,1995 recorded by China Digital Seismic Net(CDSN).Results show that emergent angle obviously risen variation in several months before the mainshock,and azimuth obviously dropped.The authors have discussed the probably method of strong earthquake prediction by using the emergent and azimuth anomaly.

关 键 词：P波 出射角 方位角 地震前兆 

分 类 号：P315.01[天文地球—地震学]