| Ionospheric perturbations before Pu’er earthquake observed on DEMETER |
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| 引用本文： | 朱荣,杨冬梅,荆凤,杨俊英,欧阳新艳.Ionospheric perturbations before Pu’er earthquake observed on DEMETER[J].地震学报(英文版),2008,21(1):77-81. |
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| 作者姓名： | 朱荣 杨冬梅 荆凤 杨俊英 欧阳新艳 |
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| 作者单位： | Institute;Geophysics;China;Earthquake;Administration;Science;Laboratory;Space;Weather;Center;Applied;Research;Chinese;Academy;Sciences;Beijing;100081;100036;100080; |
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| 基金项目： | Special Project for Earthquake Monitoring of China Earthquake Administration. |
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| 摘 要： | A destructive shock with magnitude of 6.3 occurred on 2 June 2007 at 21h34min56s UT in Pu’er region (23.0°N, 101.1°E), Yunnan Province, China. The data from DEMETER satellite during the period from 23 May to 2 June, i.e., ten days before the earthquake and one day just on the day of earthquake occurrence, were analyzed. Among the 284 orbits of DEMETER during the period, 29 orbits with the trace passing through the region within 1 888 km from the epicenter were selected to be studied. Seven anomalous events were found on the dataset of the seven orbits among the 29 ones. There existed synchronous perturbations on the variations of the spectrogram of the electric field and the variations of the density and temperature of the ions and electron, in contrast with the variations of its surround- ing area. And five events appeared in the space within 1 888 km from the epicenter while the other two were out of the studied area. Electrostatic turbulences were also recorded with the synchronous perturbations with that in the electron density and ions density in plasma in the region near the epicenter in the five events, which seems to sug- gest that there be some physical relation between these events and the preparation processes of Pu’er earthquake.
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| 关 键 词： | DEMETER Pu’er earthquake ionospheric perturbations |
| 收稿时间： | 13 July 2007 |
| 修稿时间： | 3 December 2007 |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
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