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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Dependence of waveform of near-field coseismic ionospheric disturbances on focal mechanisms
| Title: | Dependence of waveform of near-field coseismic ionospheric disturbances on focal mechanisms |
| Authors: | Astafyeva, Elvira Browse this author | | Heki, Kosuke Browse this author →KAKEN DB |
| Keywords: | Coseismic ionosphere disturbances | | TEC | | GPS | | earthquakes | | focal mechanism |
| Issue Date: | 1-Jul-2009 |
| Publisher: | Terra Scientific Publishing Company |
| Journal Title: | Earth, Planets and Space |
| Volume: | 61 |
| Issue: | 7 |
| Start Page: | 939 |
| End Page: | 943 |
| Abstract: | 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. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/49524 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 日置 幸介
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