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| Presentation | 2021-08-27 13:30 Observation of gravity flow with acoustic sensors on deep seafloor -- Characteristic signal and peculiar signal -- Ryoichi Iwase (JAMSTEC)  US2021-27 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | On the deep seafloor off Tokachi in Hokkaido and Hatsushima Island in Sagami Bay, turbidity currents and mudflows generated by earthquakes which are collectively called gravity flows have been observed by the submarine cabled observatories of Japan Agency for Marine-Earth Science and Technology (JAMSTEC). The acoustic sensor detects the gravitational flow as a change in the flow velocity by the Acoustic Doppler Current Profiler (ADCP). On the other hand, regarding the turbidity current associated with the 2003 Tokachi-oki earthquake, a peculiar signal was also detected by the hydrophone. However, the origin is not well understood. It was examined during the ongoing rescue work of long-term observation data. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Gravity flow / Acoustic Doppler Current Profiler (ADCP) / Submarine cabled observatory / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 163, US2021-27, pp. 1-2, Aug. 2021. | |
| Paper # | US2021-27 | |
| Date of Issue | 2021-08-20 (US) | |
| ISSN | Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2021-27 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2021-08-27 - 2021-08-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Underwater acoustics, Ultrasonics, etc. |
| Paper Information | |
| Registration To | US |
| Conference Code | 2021-08-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Observation of gravity flow with acoustic sensors on deep seafloor |
| Sub Title (in English) | Characteristic signal and peculiar signal |
| Keyword(1) | Gravity flow |
| Keyword(2) | Acoustic Doppler Current Profiler (ADCP) |
| Keyword(3) | Submarine cabled observatory |
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| 1st Author's Name | Ryoichi Iwase |
| 1st Author's Affiliation | JAMSTEC (JAMSTEC) |
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| Speaker | Author-1 |
| Date Time | 2021-08-27 13:30:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2021-27 |
| Volume (vol) | vol.121 |
| Number (no) | no.163 |
| Page | pp.1-2 |
| #Pages | 2 |
| Date of Issue | 2021-08-20 (US) |
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