自己浮上型海底地震計の浮上姿勢の改善による調査の効率化

野 徹雄; 佐藤 壮; 佃 薫; 寺田 育正; 前川 拓也; 森 誠一; 芹澤 皇子; 西條 暁里; 坂本 衣里; 三浦 誠一; 小平 秀一

doi:10.14928/amstec.24.2_1

Original Paper

Increasing the Efficiency of Crustal Structure Surveys Based on Improving the Floating Posture of Pop-Up Ocean Bottom Seismographs

Tetsuo No, Takeshi Sato, Kaoru Tsukuda, Ikumasa Terada, Takuya Maekawa, Seiichi Mori, Kimiko Serizawa, Toshinori Saijo, Eri Sakamoto, Seiichi Miura, Shuichi Kodaira

Author information

Tetsuo No
Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Takeshi Sato
Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Kaoru Tsukuda
Marine science department, Nippon Marine Enterprises, Ltd
Ikumasa Terada
Marine science department, Nippon Marine Enterprises, Ltd
Takuya Maekawa
Marine science department, Nippon Marine Enterprises, Ltd
Seiichi Mori
Marine science department, Nippon Marine Enterprises, Ltd
Kimiko Serizawa
Marine science department, Nippon Marine Enterprises, Ltd
Toshinori Saijo
Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Marine science department, Nippon Marine Enterprises, Ltd
Eri Sakamoto
Marine science department, Nippon Marine Enterprises, Ltd
Seiichi Miura
Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Shuichi Kodaira
Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Keywords: Ocean bottom seismograph, Floating speed, Counterweight, Floating posture, Seismic survey

JOURNAL FREE ACCESS

2018 Volume 24 Issue 2 Pages 1-8

DOI https://doi.org/10.14928/amstec.24.2_1

Details

Abstract

To conduct efficient seismic surveys using the pop-up ocean bottom seismographs (OBSs), we attempted attaching a metal rod (counterweight) to the OBS. As a result, the floating speed and the floating posture of the OBS improved during the OBS recovery. Since this attachment of counterweight also improved the floating posture on the sea surface, this was also effective for efficiency of the recovery operation of the OBS from the sea surface to on deck. When conducting a seismic survey using many OBSs, this method proves to be inexpensive, works very effectively, and may avoid the influence of individual differences with respect to the center of gravity and balance of each OBS.

Corresponding author

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