Temporal and spatial precursors in ionospheric total electron content of the 16 October 1999 Mw7.1 Hector Mine earthquake

Y. C. Su, J. Y. Liu, S. P. Chen, H. F. Tsai, M. Q. Chen

研究成果: 雜誌貢獻期刊論文同行評審

21 引文 斯高帕斯(Scopus)

摘要

In this paper, temporal and spatial analyses are employed to detect seismo-ionospheric precursors (SIPs) in the ionospheric total electron content (TEC) during the 16 October 1999 Mw7.1 Hector Mine earthquake. To discriminate anomalies caused by global effects, such as solar radiations, magnetic storms, etc., and local effects, such as earthquake, we cross-examine the GPS TECs and their gradients in the eastward and northward directions at epicenter/centers of the Hector Mine area and the other two reference areas at similar magnetic latitudes in Europe and Japan. Temporal variations of the northward TEC gradient suggest SIPs most likely appearing on days 6-5 before the earthquake. A global search by using the TEC of the global ionosphere map shows that the TEC increase and decrease anomalies continuously and specifically appear around the epicenter on day 5 before the earthquake. Key Points Temporal and spatial seismo-ionospheric precursors Lithosphere weather of GPS total electron content Long lasting or duration of earthquake precursors

原文???core.languages.en_GB???
頁(從 - 到)6511-6517
頁數7
期刊Journal of Geophysical Research: Space Physics
118
發行號10
DOIs
出版狀態已出版 - 10月 2013

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