Weak interplate coupling beneath the subduction zone off Fukushima, NE Japan, inferred from GPS/acoustic seafloor geodetic observation
We have been carrying out GPS/acoustic seafloor geodetic observations at several reference points situated along the Japan Trench, a major plate boundary of subduction. A time series of horizontal coordinates of one of the seafloor reference points, located off Fukushima, obtained from seven campaig...
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| Veröffentlicht in: | Earth, planets, and space planets, and space, 2008-01, Vol.60 (6), p.e9-e12 |
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| container_title | Earth, planets, and space |
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| creator | Matsumoto, Yoshihiro Ishikawa, Tadashi Fujita, Masayuki Sato, Mariko Saito, Hiroaki Mochizuki, Masashi Yabuki, Tetsuichiro Asada, Akira |
| description | We have been carrying out GPS/acoustic seafloor geodetic observations at several reference points situated along the Japan Trench, a major plate boundary of subduction. A time series of horizontal coordinates of one of the seafloor reference points, located off Fukushima, obtained from seven campaign observations for the period 2002-2008, exhibits a linear trend with a scattering root mean square of about 3 cm. A linear fit to the time series gives an intraplate crustal movement velocity of 3.1 cm per year in a westerly direction, which is significantly smaller than that at the other seafloor reference point 120 km away along the trench axis. This result implies weak interplate coupling in this region. |
| doi_str_mv | 10.1186/BF03353114 |
| format | Article |
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| source | SpringerLink Journals; Springer Nature OA Free Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Cosmochemistry. Extraterrestrial geology E-Letter Earth and Environmental Science Earth Sciences Earth, ocean, space Exact sciences and technology Geology Geophysics/Geodesy |
| title | Weak interplate coupling beneath the subduction zone off Fukushima, NE Japan, inferred from GPS/acoustic seafloor geodetic observation |
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