A Study of the Electric Field before the Wenchuan 8.0 Earthquake of 2008 Using both Space-Based and Ground-Based Observational Data

详细信息   

• 责任者：An Zhanghui (Lanzhou Base ; Institute of Earthquake Prediction ; China Earthquake Administration ; Lanzhou 730000 ; China) ; Du Xuebin
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(11)
• 关键词：地震预测 ; earthquake prediction ; 汶川地震2008 ; Wenchuan earthquake 2008
• 页码：p.2876-2884
• 图表：3 illus., 45 refs.
• 分类号：0500
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The authors studied the changes of the electric field before the Wenchuan earthquake 2008 using both space-based and ground-based observational data and the method of marginal spectrum. The  result reveals that the marginal spectrum of the electric field in the ionosphere had a remarkable increase from the 27th April, 2008 to the time when the Wenchuan earthquake happened. For the evolution of marginal spectrum of the electric field from the ground-based data, the marginal spectrum of Songshan station of Sino-French cooperation began to enhance. Such a phenomenon appeared at Chengdu, Longnan and Tianshui stations. It seems that the enhancement of marginal spectra of both the ground and space electric fields happened at a roughly same time.