Detection of ruptures of Andaman fault segments in the 2004 great Sumatra earthquake with coseismic ionospheric disturbances

Heki, Kosuke; Otsuka, Yuichi; Choosakul, Nithiwatthn; Hemmakorn, Narong; Komolmis, Tharadol; Maruyama, Takashi

doi:10.1029/2005jb004202

Public

Detection of ruptures of Andaman fault segments in the 2004 great Sumatra earthquake with coseismic ionospheric disturbances

Published in Journal of Geophysical Research Atmospheres • Sep 1, 2006

Authors:

Kosuke Heki

Yuichi Otsuka

Nithiwatthn Choosakul

Abstract

Near‐field coseismic perturbations of ionospheric total electron content (TEC), caused by direct acoustic waves from focal regions, can be observed with Global Positioning System (GPS). They appear 10–15 min after the earthquake with typical periods of ∼4–5 min and propagate as fast as ∼1 km/s towar...

Subject

Geology

TEC

Ionosphere

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