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タイトル: 1996年11月から2012年2月までの東海地方における絶対重力観測結果
その他のタイトル: Results of absolute gravity measurements in the Tokai area from November 1996 to February 2012
著者: 田中, 愛幸
張, 新林
付, 広裕
菅野, 貴之
松本, 滋夫
古屋, 正人
孫, 文科
大久保, 修平
著者(別言語): Tanaka, Yoshiyuki
Zhang, Xinlin
Fu, Guangyu
Sugano, Takayuki
Matsumoto, Shigeo
Furuya, Masato
Sun, Wenke
Okubo, Shuhei
キーワード: gravity
crustal movement
subduction zone
geodetic observation
発行日: 2013年
出版者: 東京大学地震研究所
掲載誌情報: 地震研究所彙報. 第87号1/2冊, 2012, pp. 1-6
抄録: Gravity changes observed with FG5 absolute gravimeters during the period 1996-2012 in the Tokai area are reported. There are three observation sites in the area, where gravity changes were measured once or twice a year. In Omaezaki, located at the cusp of the Peninsula, gravity increased 10 microGals over 16 years. In Kikugawa, at the center of the Peninsula, gravity increased 5 microGals from 2008to 2012. In Toyohashi, located to the west of lake Hamana-ko, where the long-term slow slip began in 2000, gravity decreased 6 microGals from 2004 to 2012. The rates of these gravity changes do not agree completely with those inferred from crustal uplift/subsidence observed by GPS, implying the possibility that mass redistributions are occurring underground. Monitoring and modeling those mass redistributions are important to understand inter-seismic crustal activities including slow slips, and to reveal stress accumulation processes in a subduction zone.
URI: http://hdl.handle.net/2261/54885
ISSN: 00408972


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