4. Seismology

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  1. Full paper

    Alteration and dehydration of subducting oceanic crust within subduction zones: implications for décollement step-down and plate-boundary seismogenesis

    The alteration and dehydration of predominantly basaltic subducting oceanic crustal material are thought to be important controls on the mechanical and hydrological properties of the seismogenic plate interfac...

    Jun Kameda, Sayako Inoue, Wataru Tanikawa, Asuka Yamaguchi, Yohei Hamada, Yoshitaka Hashimoto and Gaku Kimura

    Earth, Planets and Space 2017 69:52

    Published on: 18 April 2017

  2. Letter

    Local site effects in Kumamoto City revealed by the 2016 Kumamoto earthquake

    To evaluate local site effects in Kumamoto City, we installed six temporary seismic stations along a 6-km north–south survey line in the city immediately after the 2016 Kumamoto earthquake foreshock (Mj 6.4),...

    Seiji Tsuno, Masahiro Korenaga, Kyosuke Okamoto, Hiroaki Yamanaka, Kosuke Chimoto and Takeshi Matsushima

    Earth, Planets and Space 2017 69:37

    Published on: 7 March 2017

  3. Express Letter

    Anelastic properties beneath the Niigata–Kobe Tectonic Zone, Japan

    We estimate the three-dimensional (3D) P-wave attenuation structure beneath the Niigata–Kobe Tectonic Zone (NKTZ), central Japan, using high-quality waveform data from a large number of stations. The obtained ...

    Junichi Nakajima and Toru Matsuzawa

    Earth, Planets and Space 2017 69:33

    Published on: 22 February 2017

  4. Letter

    Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations

    We determined hypocenter distributions and focal mechanisms of earthquakes off the Boso Peninsula, Japan, based on seafloor observations using ocean-bottom seismometers (OBSs). From OBS data, we detected and l...

    Aki Ito, Hiroko Sugioka, Koichiro Obana, Ryota Hino, Daisuke Suetsugu, Kazuo Nakahigashi, Masanao Shinohara, Masaru Nakano and Yojiro Yamamoto

    Earth, Planets and Space 2017 69:30

    Published on: 9 February 2017

  5. Letter

    Assessment of nonlinear site response at ocean bottom seismograph sites based on S-wave horizontal-to-vertical spectral ratios: a study at the Sagami Bay area K-NET sites in Japan

    We analyzed S-wave horizontal-to-vertical (S-H/V) spectral ratios at six ocean bottom seismograph (OBS) sites of K-NET located in the Sagami Bay area of Japan for nonlinear site responses. The degree of nonlin...

    Yadab P. Dhakal, Shin Aoi, Takashi Kunugi, Wataru Suzuki and Takeshi Kimura

    Earth, Planets and Space 2017 69:29

    Published on: 8 February 2017

  6. Full paper

    Dynamics of the Wulong landslide revealed by broadband seismic records

    The catastrophic Wulong landslide occurred at 14:51 (Beijing time, UTC+8) on 5 June 2009, in Wulong Prefecture, Southwest China. This rockslide occurred in a complex topographic environment. Seismic signals ge...

    Zhengyuan Li, Xinghui Huang, Qiang Xu, Dan Yu, Junyi Fan and Xuejun Qiao

    Earth, Planets and Space 2017 69:27

    Published on: 3 February 2017

  7. Letter

    Geomorphic features of surface ruptures associated with the 2016 Kumamoto earthquake in and around the downtown of Kumamoto City, and implications on triggered slip along active faults

    The ~30-km-long surface ruptures associated with the M w 7.0 (M j 7.3) earthquake at 01:25 JST on April 16 in Kumamoto Prefecture appeared along the previously mapp...

    Hideaki Goto, Hiroyuki Tsutsumi, Shinji Toda and Yasuhiro Kumahara

    Earth, Planets and Space 2017 69:26

    Published on: 2 February 2017

  8. Full paper

    Rupture process of the main shock of the 2016 Kumamoto earthquake with special reference to damaging ground motions: waveform inversion with empirical Green’s functions

    In this study, the rupture process of the main shock of the Kumamoto earthquake, particularly the generation of strong ground motions in the frequency range relevant to structural damage, was investigated bas...

    Atsushi Nozu and Yosuke Nagasaka

    Earth, Planets and Space 2017 69:22

    Published on: 31 January 2017

  9. Letter

    Strong motions observed by K-NET and KiK-net during the 2016 Kumamoto earthquake sequence

    The nationwide strong-motion seismograph network of K-NET and KiK-net in Japan successfully recorded the strong ground motions of the 2016 Kumamoto earthquake sequence, which show the several notable character...

    Wataru Suzuki, Shin Aoi, Takashi Kunugi, Hisahiko Kubo, Nobuyuki Morikawa, Hiromitsu Nakamura, Takeshi Kimura and Hiroyuki Fujiwara

    Earth, Planets and Space 2017 69:19

    Published on: 30 January 2017

  10. Letter

    Continuity of subsurface fault structure revealed by gravity anomaly: the eastern boundary fault zone of the Niigata plain, central Japan

    We have investigated gravity anomalies around the Niigata plain, which is a sedimentary basin in central Japan bounded by mountains, to examine the continuity of subsurface fault structures of a large fault zo...

    Shigeki Wada, Akihiro Sawada, Yoshihiro Hiramatsu, Nayuta Matsumoto, Shinsuke Okada, Toshiyuki Tanaka and Ryo Honda

    Earth, Planets and Space 2017 69:15

    Published on: 23 January 2017

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