昆仑山口西8.1级地震红外异常的新认识  

The New Understanding of Thermal Infrared Anomalies before and after the Kunlun Mountain M_S8.1 Earthquake,2001

作　　者：郭卫英 巩浩波 董蕾 贺曼秋 曹坤剑 

机构地区：[1]重庆市地震局,重庆401147

出　　处：《地震工程学报》2016年第A01期16-21,共6页China Earthquake Engineering Journal

基　　金：中国地震科技星火计划项目(XH14043)

摘　　要：对东昆仑断裂卫星红外影像的地貌特征进行地学理解的基础上,对2001年昆仑山口西8.1级地震前后的红外图像进行了进一步分析;利用红外图像差值剖面线分析法,将地震前后的遥感图像进行灰度值差分处理、红外亮温变化检测,然后对断裂带的不同段落进行红外亮温值剖面线分析。结果发现:(1)震前10天左右在东昆仑断裂带的西段区域出现明显的增温异常,震前7天出现奇特的异常云,这可能是深部上涌的气体导致的蒸发致冷效应,应是一种地球内部热动力作用引起的地球排气现象;(2)图像差值剖面线分析结果显示震前2天红外增温异常集中在两个区域:一是主震震中所在的布喀达坂峰附近;二是在宏观震中附近的库赛湖地区。与前人的研究结果相比,本文发现的异常其时、空特征更突出,可能有一定的临震指示意义。To identify the infrared anomalies that occurred before and after the 2001 Kunlun Mountain M s8. earthquake, infrared images were studied. To detect the changes in infraredbrightness temperature, differential treatment was performed on the image gray values, along with profile analysis of the infrared image differences. The results show： （1 ） there was a clear warming anomaly about ten days before the earthquake in the western part of the east Kunlun fault zone, and a strange “ abnormal cloud” phenomenon occurred seven days before the earthquake ;（2） two days before the earthquake, the infrared anomalies were concentrated in the area near Mount Buka Daban, where the mainshock epicenter was located, and in the Kusai Lake area near the macro-epicenter. The spatial-temporal characteristics of the anomalies indicated here are more obvious than in previous studies, and are helpful for imminent earthquake prediction.

关 键 词：东昆仑断裂 昆仑山口西8.1级地震 红外辐射 图像处理 地震异常 

分 类 号：P351.72[天文地球—空间物理学]