Dependence of waveform of near-field coseismic ionospheric disturbances on focal mechanisms

Astafyeva, Elvira; Heki, Kosuke

Earth, Planets and Space, 2009, 61(7), 939-943

Permalink : https://hdl.handle.net/2115/49524

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アクセス権	open access
URI	https://hdl.handle.net/2115/49524
タイトル	Dependence of waveform of near-field coseismic ionospheric disturbances on focal mechanisms
著者	著者名 Astafyeva, Elvira
著者	e-Rad_Researcher 30280564 著者名 Heki, Kosuke
言語	英語
キーワード	Coseismic ionosphere disturbances
	TEC
	GPS
	earthquakes
	focal mechanism
発行日	2009-07-01
出版者	Terra Scientific Publishing Company
収録物名	Earth, Planets and Space
巻(号)	61(7)
ページ	939-943
抄録	Using Total Electron Content (TEC) measurements with Global Positioning System we studied ionospheric responses to three large earthquakes that occurred in the Kuril Arc on 04 October 1994, 15 November 2006, and 13 January 2007. These earthquakes have different focal mechanisms, i.e. high-angle reverse, low-angle reverse, and normal faulting, respectively. TEC responses to the 2006 and 2007 events initiated with positive and negative changes, respectively. On the other hand, the initial TEC changes in the 1994 earthquake showed both positive and negative polarities depending on the azimuth around the focal area. Such a variety may reflect differences in coseismic vertical crustal displacements, which are dominated by uplift and subsidence in the 2006 and 2007 events, respectively, but included both in the 1994 event.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
PISSN	1343-8832
NCID	AA11211921