ion: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" class=MsoNormal>Ionospheric Disturbances Associated with Strong Earthquakes—Results from Langmuir Probe Onboard Demeter Satellite
详细信息
- 责任者：Ze-Ren-Zhi-Ma (Institute of Earthquake Science ; China Earthquake Administration ; Beijing 100036 ; China) ; Zhang Xuemin
- 刊名：Seismology and Geology
- 出版年：2010
- 卷期：32(3)
- 关键词：地震前兆 ; precursor ; 电离层 ; ionosphere
- 页码：p.424-433
- 图表：6 illus., 18 refs.
- 分类号：0500
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
Using Ne (electron density) and Te (electron temperature) data of Langmuir Probe onboard DEMETER (Detection of Electro-magnetic Emissions Transmitted from Earthquake Regions) satellite, the paper studies the variations of electron density and electron temperature associated with strong earthquakes. The work principle, data format of Langmuir Probe onboard DEMETER is briefly introduced.The authors mainly studied the 2006 MW 7.9 Tonga earthquake and the MW 7.1 Taiwan earthquake in this paper. To further investigate the features of the preearthquake ionospheric anomalies, the result on the MW 7.1 Taiwan earthquake shows that Ne changed randomly, while Te kept at a relatively high level, but dropped gradually before the quake. Currently the authors have no evidence to conclude that these changes are the results from the seismic activity, but based on data reprocessing, the authors can exclude the disturbances induced by solar activity and magnetic field at certain degree. If these changes of Ne/Te really resulted from earthquake, the authors may prudently conclude that ionospheric disturbance associated with seismic activity may possibly occur in a short time impending an earthquake with a short duration.