Vertical crustal movement on the seafloor detected with differential pressure monitoring

Takayuki Tamaki, Ryota Hino, Hiromi Fujimoto, Tomoaki Yamada, Toshihiko Kanazawa, Hideyuki Murakami

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We have developed ocean bottom pressure meters (OBPs) with quartz pressure sensors. Afrer several times of seafloor observation with two OBPs, we have confirmed that the drift rate of each pressure sensor is constant, and that differential pressure monitoring fairly well cancels not only tidal variations hut effects of intermediate-term ocean dynamics. We applied this method to an earthquake swarm event 2000 near Miyake Island, Japan. The result indicated subsidence of the seafloor in the center of the swarm by 6 cmJl5days relatively to the surrounding area. The estimation agrees with observed results at tidal stations as well as the source mechanism of the earthquakes.

Original languageEnglish
Title of host publicationUT 2002 - Proceedings of the 2002 International Symposium on Underwater Technology
PublisherSociety for Underwater Technology
Pages317-319
Number of pages3
Volume2002-January
ISBN (Electronic)0780373979
DOIs
Publication statusPublished - 2002
EventInternational Symposium on Underwater Technology, UT 2002 - Tokyo, Japan
Duration: 2002 Apr 162002 Apr 19

Other

OtherInternational Symposium on Underwater Technology, UT 2002
CountryJapan
CityTokyo
Period02/4/1602/4/19

ASJC Scopus subject areas

  • Ocean Engineering

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