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Shear wave speed structure beneath the South Pacific superswell using broadband data from ocean floor and islands
| Title: | Shear wave speed structure beneath the South Pacific superswell using broadband data from ocean floor and islands |
| Authors: | Isse, Takehi Browse this author | | Suetsugu, Daisuke Browse this author | | Shiobara, Hajime Browse this author | | Sugioka, Hiroko Browse this author | | Yoshizawa, Kazunori Browse this author →KAKEN DB | | Kanazawa, Toshihiko Browse this author | | Fukao, Yoshio Browse this author |
| Issue Date: | Aug-2006 |
| Journal Title: | Geophysical Research Letters |
| Volume: | 33 |
| Issue: | 16 |
| Start Page: | L16303 |
| Publisher DOI: | 10.1029/2006GL026872 |
| Abstract: | [1] We determined three-dimensional shear wave speed structure beneath the South Pacific superswell down to a depth of 200 km by analyzing Rayleigh wave records from broadband ocean bottom seismograph stations and island stations in the Pacific Ocean. The ocean bottom stations were deployed from 2003 to 2005 on the seafloor in the French Polynesian region, which enabled us to study the upper mantle structure beneath the Superswell with unprecedentedly high resolution. We measured the dispersions of fundamental mode Rayleigh waves at periods between 40 and 140 seconds by the two-station method. We found pronounced slow anomalies near the hot spots and in the Lau Basin. The slow anomalies beneath the hot spots have deeper-rooted than those associated with the Lau basin. The slow anomalies near the Society, Macdonald, Marquesas, and Pitcairn hot spots continue down to at least 200 km depth. |
| Rights: | Copyright 2006 American Geophysical Union. |
| Relation: | http://www.agu.org/pubs/authors/pdf/copyright.pdf |
| Type: | article |
| URI: | http://hdl.handle.net/2115/52170 |
| 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: 吉澤 和範
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