Seismo-ionospheric anomalies in total electron content of the GIM and electron density of DEMETER before the 27 February 2010 M8.8 Chile earthquake

Yi Ying Ho, Hau Kun Jhuang, Yung Chih Su, Jann Yenq Liu

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37 Scopus citations

Abstract

In this paper we examine the pre-earthquake ionospheric anomalies by the total electron content (TEC) extracted from GIM (global ionospheric map) and the electron density (Ne) observed by the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite during the 2010 M8.8 Chile earthquake. Temporal variations show the nighttime TEC and Ne simultaneously increase 9-19 days before the earthquake. A cross-comparison of data recorded during the period of 1 February to 3 March in 2006-2010 confirms the above temporal anomalies specifically appear in 2010. The spatial analyses show that the anomalies tend to appear over the epicenter.

Original languageEnglish
Pages (from-to)2309-2315
Number of pages7
JournalAdvances in Space Research
Volume51
Issue number12
DOIs
StatePublished - 15 Jun 2013

Keywords

  • DEMETER
  • Earthquake
  • GIM
  • Seismo-ionospheric anomaly
  • TEC

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