{"id":219,"date":"2014-01-06T18:53:52","date_gmt":"2014-01-06T09:53:52","guid":{"rendered":"http:\/\/www.eri.u-tokyo.ac.jp\/_html\/en\/?p=219"},"modified":"2016-04-14T16:50:35","modified_gmt":"2016-04-14T07:50:35","slug":"new-compact-ocean-bottom-cabled-seismometer-system-deployed-in-the-japan-sea","status":"publish","type":"post","link":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/research\/219\/","title":{"rendered":"New compact ocean bottom cabled seismometer system deployed in the Japan Sea"},"content":{"rendered":"

\u00a0 New compact ocean bottom cabled seismometer system deployed in the Japan Sea<\/strong><\/p>\n

Masanao Shinohara,\u00a0Toshihiko Kanazawa,\u00a0Tomoaki Yamada,\u00a0Yuya Machida,\u00a0Takashi Shinbo,Shin\u2019ichi Sakai<\/p>\n

Marine Geophys. Res., doi:10.1007\/s11001-013-9197-1, 2013<\/p>\n

\u00a0\u00a0http:\/\/link.springer.com\/article\/10.1007%2Fs11001-013-9197-1<\/a><\/p>\n

 <\/p>\n

Abstract<\/strong><\/p>\n

\n

The Japanese islands are positioned near the subduction zones, and large earthquakes have repeatedly occurred in marine areas around Japan. However, the number of permanent earthquake observatories in the oceans is quite limited. It is important for understanding generation of large earthquakes to observe seismic activities on the seafloor just above these seismogenic zones. An ocean bottom cabled seismometer (OBCS) is the best solution because data can be collected in real-time. We have developed a new compact OBCS system. A developed system is controlled by a microprocessor, and signals from accelerometers are 24-bit digitized. Clock is delivered from the global positioning system receiver on a landing station using a simple dedicated line. Data collected at each cabled seismometer (CS) are transmitted using standard Internet Protocol to landing stations. The network configuration of the system adopts two dual methods. We installed the first practical OBCS system in the Japan Sea, where large earthquakes occurred in past. The first OBCS system has a total length of 25\u00a0km and 4 stations with 5\u00a0km interval. Installation was carried out in August 2010. The CSs and single armored optical submarine cable were buried 1\u00a0m below the seafloor to avoid a conflict with fishing activity. The data are stored on a landing station and sent to Earthquake Research Institute, University of Tokyo by using the Internet. After the installation, data are being collected continuously. According to burial of the CSs, seismic ambient noises are smaller than those observed on seafloor.<\/p>\n<\/div>\n

\"\u56f3\uff11\u4eca\u56de\u65b0\u898f\u306b\u958b\u767a\u3057\u305fOBCS\u306e\u5185\u90e8\u30e6\u30cb\u30c3\u30c8\"<\/a>\u00a0\"\u56f3\uff12\u3000\u65e5\u672c\u6d77\u306b\u8a2d\u7f6e\u3057\u305fOBCS\u5730\u9707\u8a08\u90e8\u306e\u5916\u89b3\"<\/a><\/p>\n

\"\u56f3\uff13\u3000\u8a2d\u7f6e\u3057\u305fOBCS\u306e\u4f4d\u7f6e\"<\/a>\"\u56f3\uff14\u30002011\u5e743\u670811\u65e524\u6642\u9593\u306e\u9023\u7d9a\u8a18\u9332\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0 New compact ocean bottom cabled seismometer system deployed in the Japan Sea Masanao Shinohara,\u00a0Toshihiko Ka … Continue reading “New compact ocean bottom cabled seismometer system deployed in the Japan Sea”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-219","post","type-post","status-publish","format-standard","hentry","category-research"],"_links":{"self":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/219"}],"collection":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/comments?post=219"}],"version-history":[{"count":1,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/219\/revisions"}],"predecessor-version":[{"id":220,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/posts\/219\/revisions\/220"}],"wp:attachment":[{"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/media?parent=219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/categories?post=219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eri.u-tokyo.ac.jp\/en\/wp-json\/wp\/v2\/tags?post=219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}