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.
出处
《地震工程学报》
CSCD
北大核心
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)
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
the eastern Kunlun fault
Kunlun Mountain M s8. 1 earthquake
infrared radiation
image processing
earthquake anomaly
