2024-03-29T13:26:57Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00032414
2022-12-19T05:37:52Z
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Geodetic Measurements with GPS in the Southern Area of the Matsumoto Basin, Central Japan (1992-2012)
松本盆地南部のGPS地殻変動観測(1992-2012)
角野, 由夫
72520
青木, 知世
72521
寺谷, 尚子
72522
梅村, 宗太郎
72523
片山, 泰三
72524
五十嵐, 麻咲美
72525
関口, 玲奈
72526
菊地, 悠一郎
72527
鈴木, 友里
72528
上本, 季更
72529
小林, 雅裕
72530
村上, 英貴
72531
澤崎, 絵理子
72532
土田, 恭子
72533
南谷, 太一
72534
西口, 知久
72535
51.1
GPS
crustal movement
southern area of Matsumoto basin
Since 1992, geodetic measurements with GPS have been taken in the southern area of the Matsumoto basin, Nagano Prefecture, central Japan. The Matsumoto basin is located on the Itoigawa-Shizuoka Tectonic Line, which has recently been regarded as a plate boundary between the Eurasian plate and the North American plate. The GPS network of Shinshu University, established along the Itoigawa-Shizuoka Tectonic Line, consists of four observation stations: Shinshu University, Muroyama, Nakayama, and Matsumoto City Hall. The observed data were analyzed using broadcast ephemeris and default meteorological values with the double-difference technique. From the present GPS measurements, it was found that, during the period from 1992 to 2010, the distance between Muroyama and Shinshu University̶about 12km in the east-west direction̶contracted 4 cm (4 ppm). Subsequently, during the three years from 2010 to 2012, the temporal change of the baseline length between Muroyama and Shinshu University showed an extension of 4 cm (4 ppm). In particular, the steep change of the baseline length between them showed an extension of 1.5 cm following the massive Tohoku Earthquake, with a magnitude of 9.0 on March 11, 2011. The distance between Nakayama and Shinshu University̶about 6 km in the north-south direction̶extended 1 cm (2 ppm) during the period from 1992 to 2010. Subsequently, in 2011, it contracted 1.5 cm following the Naganoken Chubu Earthquakes, with magnitudes of 5.4 and 5.1, on June 30, 2011, which struck Matsumoto city. Crustal deformation in the southern area of the Matsumoto basin, Nagano Prefecture during the last twenty years, 1992-2012, is reported and discussed in the present study.
departmental bulletin paper
東京大学地震研究所
2013
application/pdf
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
1-2
87
7
17
AN00162258
00408972
https://repository.dl.itc.u-tokyo.ac.jp/record/32414/files/IHO87102.pdf
jpn