Earthquake induced dynamics at the ionosphere in presence of magnetic storm

Minakshi Devi, A. K. Barbara, Ko Ichiro Oyama, Chia Hung Chen

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The modifications induced in the dynamics of the ionosphere by the major Japan earthquake (EQ) of March 11, 2011 (epicenter at 38.322° N, 142.369° E, M = 8.9) in presence of a magnetic storm are examined by mapping latitudinal variations of F-layer ionization density (NmF2) from 22 stations covering the epicenter zone. The changes forced into the Total Electron Content (TEC) by the major EQ in the magnetic storm ambiance are also examined from the GPS data collected at Guwahati (26° 10′ N, 91° 45' E), situated in the major fault system of East Asia. The contributions of pre-seismic electric field as well as of magnetic storm time electric field in the observed density variations are brought into the ambit of discussion. The influence of lower atmosphere in shaping TEC features during the study case is highlighted. The effects of solar activity on density variations during such complex ambiances are also addressed.

Original languageEnglish
Pages (from-to)609-618
Number of pages10
JournalAdvances in Space Research
Volume53
Issue number4
DOIs
Publication statusPublished - 2014 Feb 15

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

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