Статья

Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements

J. Y. LiuCenter for Space and Remote Sensing Research, National Central University, TaiwanYu-Jung ChuoDepartment of Information Management, Ling-Tung College, TaiwanS. ShanInstitute of Space Science, National Central University, TaiwanY. B. TsaiInstitute of Geophysics, National Central University, TaiwanY. I. ChenInstitute of Statistics, National Central University, TaiwanС. А. ПулинецInstitute of Geophysics, National Autonomous University of Mexico, MexicoShui YuInstitute of Earth Sciences, Academia Sinica, Taiwan

2004en

ABI

Аннотация

Abstract. In this paper we examine pre-earthquake ionospheric anomalies by the total electron content (TEC) derived from a ground-based receiver of the Global Positioning System (GPS). A 15-day running median of the TEC and the associated inter-quartile range (IQR) are utilized as a reference for identifying abnormal signals during all of the 20M≥6.0 earthquakes in the Taiwan area from September 1999 to December 2002. Results show that the pre-earthquake ionospheric anomalies appear during 18:00–22:00LT (LT=UT+8h) within 5 days prior to 16 of the 20M≥6.0 earthquakes. This success rate of 80% (=16/20%) suggests that the GPS TEC is useful to register pre-earthquake ionospheric anomalies appearing before large earthquakes. Key words. Ionosphere (ionospheric disturbances; ionosphere-atmosphere interactions)

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Идентификаторы

DOI: 10.5194/angeo-22-1585-2004

Цитирования и источники

Цитирований: 5Использованных источников: 0

Показатели — AkademScholar