2016年新西兰凯库拉M_(W)7.8地震前空间大气扰动  

Space Atmospheric Disturbances before the 2016 Kaikoura M_(W)7.8 Earthquake in New Zealand

作　　者：虞良斌 高飞[1] 屈小川 安家春[2] 綦子民 YU Liangbin;GAO Fei;QU Xiaochuan;AN Jiachun;QI Zimin(College of Civil Engineering,Hefei University of Technology,193 Tunxi Road,Hefei 230009,China;Chinese Antarctic Center of Surveying and Mapping,Wuhan University,129 Luoyu Road,Wuhan 430079,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥市230009 [2]武汉大学中国南极测绘研究中心,武汉市430079

出　　处：《大地测量与地球动力学》2022年第10期1089-1094,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(42171141);武汉大学地球空间环境与大地测量教育部重点实验室开放基金(20-01-10)。

摘　　要：采用欧洲中尺度天气预报中心(ECMWF)的ERA5温度数据和GPS观测数据,提取2016-11-13新西兰凯库拉M_(W)7.8地震前的温度异常和电离层VTEC异常,探讨震前空间大气扰动的时空变化特征。结果表明,2016-11-08、09震中以北分别出现温度异常和VTEC异常。温度异常具有增温-增温加强-增温衰减-增温高峰-快速衰减的变化特征,这与岩石形变-破裂释放热的过程基本一致;随着高度上升,增温面积及幅度逐渐减小,符合地震热异常在自下而上的抬升过程中逐渐消退的趋势。Using GPS data and ERA5 temperature data from the European Centre for Mesoscale Weather Forecasts(ECMWF),we extract the temperature anomalies and ionospheric VTEC anomalies before the November 13,2016 Kaikoura,New Zealand M_(W)7.8 earthquake.We then discuss the spatio-temporal characteristics of atmospheric disturbances before the earthquake.The results show that there were temperature anomalies and ionospheric VTEC anomalies north of the epicenter on November 8 and 9,2016,respectively.The temperature anomalies have the characteristics of temperature-strengthening,temperature-attenuation,temperature-peak,temperature-rapid decay,which are basically consistent with the heat release process of rock deformation-fracture.With increasing height,the area and amplitude of temperature increase gradually decrease,consistently with the trend of seismic thermal anomalies gradually subsiding in the process of bottom-up uplift.

关 键 词：新西兰M_(W)7.8地震 电离层异常 四分位距法 温度异常 天体引潮力 

分 类 号：P315[天文地球—地震学]