| 2011年3月24日缅甸地震期间电离层TEC异常分析 |
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| 引用本文： | 黄林峰,黄江,曹静,刘作莲,邓柏昌,徐杰.2011年3月24日缅甸地震期间电离层TEC异常分析[J].华南地震,2012,32(1):11-18. |
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| 作者姓名： | 黄林峰 黄江 曹静 刘作莲 邓柏昌 徐杰 |
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| 作者单位： | 1. 华南理工大学理学院,广东广州,510640
2. 广州气象卫星地面站,广东广州,510640 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 基于IGS提供的2011年3月全球TEC数据,利用滑动时窗进行异常识别的方法,分析电离层赤道异常区TEC在缅甸地震期间的异常情况。结果表明：在震前10 d内,地震上空电离层TEC出现了明显的异常扰动,电离层异常北驼峰在16日至18日期间出现了明显的较大区域负异常现象,且在18日时北驼峰明显向磁赤道漂移,负异常在19日时基本消失;而在地震发生的当天和震后一天出现了小范围的正异常,随后正异常消失。在地震期间地磁活动水平总体都相当平静,且太阳处于一个相对较稳定的中低活动水平,电离层出现的异常很可能与此次缅甸地震有关。
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| 关 键 词： | IGS-TEC 地震 电离层异常 |
Variation Analysis of Ionospheric TEC Anomaly during Burma Earthquake Occurred on March 24, 2011 |
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| HUANG Linfeng
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HUANG Jiang
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CAO Jing
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LIU Zuolian
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DENG Baichang
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XU Jie.Variation Analysis of Ionospheric TEC Anomaly during Burma Earthquake Occurred on March 24, 2011[J].South China Journal of Seismology,2012,32(1):11-18. |
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| Authors: | HUANG Linfeng HUANG Jiang CAO Jing LIU Zuolian DENG Baichang XU Jie |
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| Institution: | 1.South China University of Technology,College of science,Guangzhou 510640,China; 2.Guangzhou Meteorological Satellite Ground Stations,Guangzhou 510640,China) |
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| Abstract: | This paper analysis the ionospheric anomalies observed during the strong earthquake(M=7.2) which occurred in Burma(20.8°N,99.8°W) during March 2011.As a result,we found that the anomalous TEC disturbances over the zone of Burma earthquake,which took place ten days before the events: at the beginning,the TEC of equatorial ionization anomaly(EIA) north crest was decreasing during March 16-18,and the North crest moved toward equator at March 18,and the anomalous of the TEC disappeared completely step by step.The geomagnetic situations were rather quiet on the days during the earthquakes,and solar activity was in a relatively stable middle-low level.We can conclude that the observed anomalous of the ionospheric TEC was likely associated with the imminent earthquake. |
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| Keywords: | IGS-TEC earthquake ionospheric anomalies |
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