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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
第69号 >
2004年12月26日 Sumatra-Andaman 地震の理論歪地震波形の計算と観測波形の比較
| Title: | 2004年12月26日 Sumatra-Andaman 地震の理論歪地震波形の計算と観測波形の比較 |
| Other Titles: | Calculation of Theoretical Strain Seismogram by Normal Mode Theory and Comparison with Observed Data from the Sumatra-Andaman Earthquake of December 26, 2004 |
| Authors: | 池上, 裕1 Browse this author | | 岡本, 大志2 Browse this author | | 中西, 一郎3 Browse this author | | 小久保, 一哉4 Browse this author |
| Authors(alt): | IKEGAMI, Yutaka1 | | OKAMOTO, Taishi2 | | NAKANISHI, Ichiro3 | | KOKUBO, Kazuya4 |
| Issue Date: | 15-Mar-2006 |
| Publisher: | 北海道大学大学院理学研究科地球惑星科学専攻（地球物理学） |
| Journal Title: | 北海道大学地球物理学研究報告 |
| Journal Title(alt): | Geophysical bulletin of Hokkaido University |
| Volume: | 69 |
| Start Page: | 221 |
| End Page: | 231 |
| Abstract: | The great Sumatra-Andaman earthquake of December 26, 2004 is studied by using extensometer (strain-meter) as very-broard-band seismograph. We analyze the strain seismograms obtained by 100 m extensometers installed at Matsushiro Seismological Observatory. Japan Meteorological Agency. We compare the observed strain seismograms with thouse calculated by normal mode theory and obtain fairly good agreement between the observed and calculated seismograms for a five-sourcse model with a moment magnitude of 9.3 and a source duration of about 600 sec. We find a peculiar strain change right after the passage of Rayleigh wave in the NS component of the strain seismograms. This strain change cannot be explained by the summation of normal modes and double-couple type sources. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/21511 |
| Appears in Collections: | 北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第69号
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