地震地磁观测与研究2016，Vol.37Issue(2)：6-14,9.DOI:10.3969/j.issn.1003-3246.2016.02.002
2013年2月20日广西平果4.5级地震震害及地震前兆异常特征分析
Characteristic analysis about earthquake damage and earthquake precursory anomaly of PingguoM4.5 earthquake in Guangxi area on February 20, 2013
摘要
Abstract
Based on the PingguoM4.5 earthquake damage and seismic characteristics of seismic precursor anomaly analysis.The knowledge of damage characteristics, seismic geology, seismic sequence and seismic precursory data of the region are accumulated. The result has certain guiding signiifcance for earthquake prediction, earthquake emergency prediction work. This earthquake, occurred on F2 fracture of North West Zone in western Guangxi strong earthquake active area, belongs to isolated type earthquake sequence. The fault zone is with sinistral thrust characteristics. The earthquake was felt in large range and with wide spread effect. The intensity of the earthquake in epicenter area isVI+, once again relfecting the disaster characteristics of low magnitude, high intensity and serious damage in Guangxi region. Then from the temporal and spatial distribution of earthquakes, parameter of frequency and total fault area, stress drop before and after the earthquake, significant earthquake characteristics and precursory anomalies, the precursory anomaly characteristics of Pingguo earthquake are studied. The results showed that, before the earthquake, precursory anomalies of seismic activity spatial-temporal image, parameter value of seismology, geomagnetism and water level etc are very remarkable. The occurrence of medium and short term anomalies assorted.关键词
地震活动增强/震害/地震前兆/震源机制解Key words
seismic activity enhancement/earthquake damage/earthquake precursor/focal mechanism solutions引用本文复制引用
郭培兰,史水平,阎春恒,龙政强..2013年2月20日广西平果4.5级地震震害及地震前兆异常特征分析[J].地震地磁观测与研究,2016,37(2):6-14,9.基金项目
广西科学研究与技术开发计划项目（桂科攻1298005-2）、广西科学研究与技术开发计划项目（桂科攻1140004-2）及广西科学研究与技术开发计划项目（桂科攻12426001）联合资助 （）
