空间科学学报2011，Vol.31Issue(3)：318-322,5.
强地震活动事件期间热层大气密度异常变化的探测结果
Abnormal Variation of Thermosphere Atmospheric Density During the Period of Big Earthquake
曾宏 1朱光武 2秦国泰 1陈华姣 1李永平1
作者信息
- 1. 中国科学院空间科学与应用研究中心,北京100190
- 2. 中国科学院研究生院,北京100049
- 折叠
摘要
Abstract
Earthquake is the natural disaster that human beings are most concerned about, while the influence of earthquake on the density of the thermosphere is not clear.Recently, it was occurred a class of 8.0 big earthquake on May 12, 2008 in Wenchuan City, Sichuan province in China.Later,a series of big earthquake events with the class 7.0～7.6 happened in the east of Honshu in Japan on June 14, Okhotsk on July 5 and the east seacoast of Honshu on July 19.During the course of earthquake events, an atmospheric density detector on board of the solar synchronous satellite at the orbital altitude of 630 km worked all the time and got a large quantity of in-situ measurement data.According to the data, it was discovered that the abnormal atmospheric density decrease over the center region of the earthquake source on the earthquake day.During the period about 1～3 days before the strong earthquake, the decrease of upper atmospheric density has been existed and reached the valley on the earthquake day with the decreasing ratio ranging from 0.40 to 0.65.Furthermore,the range of the decrease located at the latitude of ±3°～ ±9° from the earthquake center before the earthquake, but it expanded to about ±8° ～ ±20° from the earthquake center on the earthquake day.关键词
热层大气密度/强地震Key words
Thermosphere atmospheric density/ Powerful earthquake分类
天文与地球科学引用本文复制引用
曾宏,朱光武,秦国泰,陈华姣,李永平..强地震活动事件期间热层大气密度异常变化的探测结果[J].空间科学学报,2011,31(3):318-322,5.
