1995年7月25日那坡4.3级地震概述

Summary of Napo M_S 4.3 earthquake on July 25,1995 in Guangxi

1995年7月25日广西那坡发生了4.3级地震,通过对那坡地区的地震地质、地震前兆、地震序列等资料分析,认为此次地震发生在北东向德隆-下华断裂带上,地震等烈度线长轴为北东向,宏观震中在那坡县规弄山中,震源机制解结果表明节面Ⅰ是本次地震的主破裂面,走向北东,与德隆-下华断裂一致。由于震中附近观测台站较少,震前没有发现前兆异常,测震学资料在很大程度上又受到北部湾6.1、6.2级地震序列的影响,无法分辩异常,据震后调查震前有少量宏观异常现象出现。

Based on the analysis of information on seismic geology,earthquake precursor and seismic sequence of the area,we found that Napo MS 4.3 earquake on July 25,1995 occurred at Delong-Xiahua fault in NE direction. The macroscopical epicenter was in Guinong mountain in Napo county. The mechanism solution shows that the nodal planeⅠis the main rupture plane of this earthquake. Its direction is NE, alike Delong-Xiahua fault. We did not find precursor anomalies before the earthquake occurred because there were few seismic observatories near the epicenter, and could not distinguish abnormity because the information was affected by Beibu Gulf MS 6.1?6.2 earthquakes,but found some macroscopical abnormity after the event occurred.