文安地震前华北区域长波辐射场的异常特征分析

地震 ›› 2007, Vol. 27 ›› Issue (3): 83-88.

文安地震前华北区域长波辐射场的异常特征分析

康春丽¹, 王亚丽¹, 刘德富²

1.中国地震台网中心, 北京 100036;
2.中国地震局地震预测研究所, 北京 100036

收稿日期:2006-12-29 修回日期:2007-04-23 出版日期:2007-07-31 发布日期:2021-10-29
作者简介:康春丽(1964-), 女, 陕西大荔人, 副研究员, 主要从事卫星遥感热红外技术在地震预测中的应用及预报等研究。
基金资助:
北京市科技攻关项目(H030630090190); 地震科学联合基金项目(106039)

Research on anomalous characteristics of outgoing- longwave-radiation (OLR) of Northern China before Wen′an M_S5.1 earthquake

KANG Chun-li¹, WANG Yali¹, LIU De-fu²

1. China Earthquake Network Center, Beijing 100036;
2. Institute of Earthquake Science, CEA, Beijing 100036, China

Received:2006-12-29 Revised:2007-04-23 Online:2007-07-31 Published:2021-10-29

摘要/Abstract

摘要： 利用NOAA/IR极轨卫星所获取并发布的热红外长波辐射(OLR)月平均网格数据信息(空间分辨率为2.5°×2.5°), 采用涡度处理方法, 在对华北地区OLR多年背景场分布特征分析的基础上, 详细研究了2006年7月4日河北文安5.1级地震前华北地区OLR的短期异常演化特征。结果显示, 华北地区OLR正常背景场变化较为平稳, 但在文安地震之前这种平稳均一的分布格局发生了变化, 主要表现为在地震发生之前2个月, 在震中附近出现了OLR的显著增强异常现象。结合以往开展的大量的震例分析结果, 显示出这种震前的异常演化特征具有广泛的普适性。这一认识的取得对于开展华北地区地震短临预报应用研究具有一定的现实意义。

关键词: 长波辐射, 异常信息, 前兆特征, 文安5.1级地震

Abstract: An earthquake with M_S5.1 occurred in Wen'an County, Hebei Province in north China, on July 4, 2006. Based on monthly average Grid data with spatial resolution of 2.5°×2.5°, getting from observations of NOAA/IR polar orbit satellite in recent years, this paper analyzed the anomalous characteristics and its evolvement in time series on ambient field of OLR in north China by using Eddy covariance means before the earthquake. The research result is as follows: The change of normal ambient field is stable, the OLR value is changed with a notably anomaly two months earlier before the earthquake, and the phenomena usually happened around the epicenter. Combining previous earthquake case study by using the similar method, the characteristics of OLR anomaly before earthquake takes the catholicity. The result must have great practical significance in the short-term earthquake prediction in Northern China.

Key words: Wen′an M_S5.1 earthquake, Outgoing-Longwave-Radiation, Extraction of the anomalous information, Seismic precursor characteristics

中图分类号:

P315.7

康春丽, 王亚丽, 刘德富. 文安地震前华北区域长波辐射场的异常特征分析[J]. 地震, 2007, 27(3): 83-88.

KANG Chun-li, WANG Yali, LIU De-fu. Research on anomalous characteristics of outgoing- longwave-radiation (OLR) of Northern China before Wen′an M_S5.1 earthquake[J]. EARTHQUAKE, 2007, 27(3): 83-88.

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