地震前兆还是降雨干扰?——与“宁强5.7级地震前陕西定点形变的异常现象”作者商榷  

Earthquake precursor or rainfall interference?——Discuss with authors of the paper “Anomaly phenomenon of pointing deformation in Shaanxi Province before Ningqiang MS5.7 earthquake”

作　　者：杨小林 丁晓光 杨锦玲 危自根 YANG Xiaolin;DING Xiaoguang;YANG Jinling;WEI Zigen(Shaanxi Seismic Station,Xi'an 710068,Shaanxi,China;Fujian Seismic Station,Fuzhou 350003,Fujian,China;Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,Hubei,China)

机构地区：[1]陕西地震台,陕西西安710068 [2]福建地震台,福建福州350003 [3]中国科学院精密测量科学与技术创新研究院,湖北武汉430077

出　　处：《地震工程学报》2023年第1期138-144,共7页China Earthquake Engineering Journal

基　　金：中国科学院战略先导B类专项(XDB41000000);大地测量与地球动力学国家重点实验室自主项目(S21L6403)。

摘　　要：在宁强MS5.7地震(2008年5月27日)发生前2天,宝鸡台洞体应变NS和EW分量分别记录到了大幅应变异常,有研究认为该异常是宁强地震的短临前兆^([1])。为客观验证该结论的真伪性,本文采用重复地震检验和统计实证等方法,对该异常进行了较系统的归因分析,结果表明降雨干扰才是主因。Approximately two days prior to the Ningqiang MS5.7 earthquake(May 27, 2008), a large amount of cave strain anomalies were recorded in the NS and EW components at Baoji station. A previous study showed that these phenomena were short-imminent earthquake precursors of the Ningqiang MS5.7 earthquake[1]. By means of repeated earthquake tests and empirical statistics, the attribution of these anomalies was analyzed systematically to objectively verify the authenticity of this conclusion. Results showed that rainfall interference was the main cause of the remarkable strain anomalies.

关 键 词：宁强MS5.7地震 定点形变 地震前兆 降雨 宝鸡台 洞体应变 

分 类 号：P315.725[天文地球—地震学]