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4. Seismology

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  1. Content type: Full paper

    The consideration of soil nonlinearity is important for the accurate estimation of the site response. To evaluate the soil nonlinearity during the 2008 Ms8.0 Wenchuan Earthquake, 33 strong-motion records obtai...

    Authors: Yefei Ren, Ruizhi Wen, Xinxin Yao and Kun Ji

    Citation: Earth, Planets and Space 2017 69:116

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  2. Content type: Full paper

    Inter-station cross-correlation functions estimated using continuous ambient noise or microtremor records were used to extract the seismic wave propagation characteristics of the Osaka sedimentary basin, Japan...

    Authors: Kimiyuki Asano, Tomotaka Iwata, Haruko Sekiguchi, Kazuhiro Somei, Ken Miyakoshi, Shin Aoi and Takashi Kunugi

    Citation: Earth, Planets and Space 2017 69:108

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  3. Content type: Express Letter

    On October 21, 2016, an earthquake with Japan Meteorological Agency (JMA) magnitude 6.6 hit the central part of Tottori Prefecture, Japan. This paper demonstrates two notable effects of the surface geology on ...

    Authors: Takao Kagawa, Tatsuya Noguchi, Shohei Yoshida and Shinji Yamamoto

    Citation: Earth, Planets and Space 2017 69:106

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  4. Content type: Technical report

    We have developed an open-source software package, Open-source Seismic Wave Propagation Code (OpenSWPC), for parallel numerical simulations of seismic wave propagation in 3D and 2D (P-SV and SH) viscoelastic m...

    Authors: Takuto Maeda, Shunsuke Takemura and Takashi Furumura

    Citation: Earth, Planets and Space 2017 69:102

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  5. Content type: Full paper

    The Himalayan collision zone experiences many seismic activities with large earthquakes occurring at certain time intervals. The damming of the proto-Bagmati River as a result of rapid mountain-building proces...

    Authors: Subeg M. Bijukchhen, Nobuo Takai, Michiko Shigefuji, Masayoshi Ichiyanagi, Tsutomu Sasatani and Yokito Sugimura

    Citation: Earth, Planets and Space 2017 69:97

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  6. Content type: Full paper

    Most modern seismic codes account for site effects using an amplification factor (AF) that modifies the rock acceleration response spectra in relation to a “site condition proxy,” i.e., a parameter related to ...

    Authors: Ahmed Boudghene Stambouli, Djawad Zendagui, Pierre-Yves Bard and Boumédiène Derras

    Citation: Earth, Planets and Space 2017 69:99

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  7. Content type: Full paper

    As observational evidence of 3-D microtremor horizontal-to-vertical spectral ratios (MHVRs), previous studies have shown that a significant directional dependency is observed in and around Uji campus, Kyoto Un...

    Authors: Shinichi Matsushima, Hiroyuki Kosaka and Hiroshi Kawase

    Citation: Earth, Planets and Space 2017 69:96

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  8. Content type: Letter

    Seismic activity occurred off western Kyushu, Japan, at the northern end of the Okinawa Trough on May 6, 2016 (14:11 JST), 22 days after the onset of the 2016 Kumamoto earthquake sequence. The area is adjacent...

    Authors: Taro Okamoto, Hiroshi Takenaka, Takeshi Nakamura and Tatsuhiko Hara

    Citation: Earth, Planets and Space 2017 69:88

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  9. Content type: Full paper

    The Ryukyu (Nansei-Shoto) island arc-trench system, southwest of Japan, is formed by the subduction of the Philippine Sea (PHS) plate. Among the subduction zones surrounding the Japan Islands, the Ryukyu arc-t...

    Authors: Azusa Nishizawa, Kentaro Kaneda, Mitsuhiro Oikawa, Daishi Horiuchi, Yukari Fujioka and Chiaki Okada

    Citation: Earth, Planets and Space 2017 69:86

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  10. Content type: Full paper

    We carried out statistical evaluations of two probability density functions for the microboudin palaeopiezometer using the Akaike information criterion (AIC) and the cross-validation (CV) technique. In terms o...

    Authors: Tarojiro Matsumura, Tatsu Kuwatani and Toshiaki Masuda

    Citation: Earth, Planets and Space 2017 69:83

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  11. Content type: Express Letter

    We have analyzed the spatial variation in coda Q in the northeastern part of a high strain rate zone, the Niigata–Kobe Tectonic Zone (NKTZ), to investigate the cause of the high strain rate by correlating coda Q ...

    Authors: Masanobu Dojo and Yoshihiro Hiramatsu

    Citation: Earth, Planets and Space 2017 69:76

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  12. Content type: Letter

    We present the results of relocating 17,544 hypocenters determined from data recorded during the 2016 Kumamoto Earthquake sequence, during the interval between April 14, 2016, and August 31, 2016. For this, w...

    Authors: Tomoko Elizabeth Yano and Makoto Matsubara

    Citation: Earth, Planets and Space 2017 69:74

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  13. Content type: Express Letter

    An earthquake of JMA magnitude 6.5 (foreshock) hit Kumamoto Prefecture, Japan, at 21:26 JST on April 14, 2016. Subsequently, an earthquake of JMA magnitude 7.3 (main shock) hit Kumamoto and Oita Prefectures a...

    Authors: Yoshiya Hata, Masayuki Yoshimi, Hiroyuki Goto, Takashi Hosoya, Hitoshi Morikawa and Takao Kagawa

    Citation: Earth, Planets and Space 2017 69:72

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  14. Content type: Full paper

    In order to clarify the origin of aftershocks, we precisely analyze the hypocenters and focal mechanisms of the aftershocks following the 2000 Western Tottori Earthquake, which occurred in the western part of ...

    Authors: Yohei Yukutake and Yoshihisa Iio

    Citation: Earth, Planets and Space 2017 69:68

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  15. Content type: Frontier letter

    A simple and efficient finite-difference scheme is developed to calculate seismic wave propagation in a partial spherical shell model of a three-dimensionally (3-D) heterogeneous global Earth structure for mod...

    Authors: Hiroshi Takenaka, Masanao Komatsu, Genti Toyokuni, Takeshi Nakamura and Taro Okamoto

    Citation: Earth, Planets and Space 2017 69:67

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  16. Content type: Letter

    In this study, we estimated source process of the 2016 Kumamoto earthquake from strong-motion data by using the multiple-time window linear kinematic waveform inversion method to discuss generation of strong m...

    Authors: Kunikazu Yoshida, Ken Miyakoshi, Kazuhiro Somei and Kojiro Irikura

    Citation: Earth, Planets and Space 2017 69:64

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  17. Content type: Full paper

    Post-seismic investigations repeatedly indicate that structures having frequencies close to foundation soil frequencies exhibit significantly heavier damages (Caracas 1967; Mexico 1985; Pujili, Ecuador 1996; L...

    Authors: Christelle Salameh, Pierre-Yves Bard, Bertrand Guillier, Jacques Harb, Cécile Cornou, Jocelyne Gérard and Michelle Almakari

    Citation: Earth, Planets and Space 2017 69:60

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  18. Content type: Full paper

    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...

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

    Citation: Earth, Planets and Space 2017 69:52

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  19. Content type: Letter

    We conducted synthetic experiments to evaluate the effects of shallow-layer reverberation in oceanic regions on P-wave travel times measured by waveform cross-correlation. Time shift due to waveform distortion...

    Authors: Masayuki Obayashi, Yasushi Ishihara and Daisuke Suetsugu

    Citation: Earth, Planets and Space 2017 69:44

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  20. Content type: Letter

    Coda-wave interferometry is a technique to detect small seismic velocity changes using phase changes in similar waveforms from repeating natural or artificial sources. Seismic interferometry is another techniq...

    Authors: Takashi Hirose, Hisashi Nakahara and Takeshi Nishimura

    Citation: Earth, Planets and Space 2017 69:42

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  21. Content type: Letter

    An M 6.8 (Mw 6.5) deep-focus earthquake occurred beneath the Bonin Islands at 21:18 (JST) on June 23, 2015. Observed high-frequency (>1 Hz) seismograms across Japan, which contain several sets of P- and S-wave ar...

    Authors: Shunsuke Takemura, Tatsuhiko Saito and Katsuhiko Shiomi

    Citation: Earth, Planets and Space 2017 69:38

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  22. Content type: Letter

    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),...

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

    Citation: Earth, Planets and Space 2017 69:37

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  23. Content type: Full paper

    This study investigates the missing data problem in the Japan Meteorological Agency catalog of the Kumamoto aftershock sequence, which occurred since April 15, 2016, in Japan. Based on the assumption that ear...

    Authors: Jiancang Zhuang, Yosihiko Ogata and Ting Wang

    Citation: Earth, Planets and Space 2017 69:36

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  24. Content type: Letter

    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...

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

    Citation: Earth, Planets and Space 2017 69:30

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  25. Content type: Letter

    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...

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

    Citation: Earth, Planets and Space 2017 69:29

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  26. Content type: Full paper

    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...

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

    Citation: Earth, Planets and Space 2017 69:27

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  27. Content type: Letter

    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...

    Authors: Hideaki Goto, Hiroyuki Tsutsumi, Shinji Toda and Yasuhiro Kumahara

    Citation: Earth, Planets and Space 2017 69:26

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  28. Content type: Full paper

    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...

    Authors: Atsushi Nozu and Yosuke Nagasaka

    Citation: Earth, Planets and Space 2017 69:22

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  29. Content type: Letter

    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...

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

    Citation: Earth, Planets and Space 2017 69:19

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  30. Content type: Letter

    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...

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

    Citation: Earth, Planets and Space 2017 69:15

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  31. Content type: Full paper

    The 2016 Kumamoto earthquakes in Kyushu, Japan, started with a magnitude (M) 6.5 quake on April 14 on the Hinagu fault zone (FZ), followed by active seismicity including an M6.4 quake. Eventually, an M7.3 quake o...

    Authors: K. Z. Nanjo and A. Yoshida

    Citation: Earth, Planets and Space 2017 69:13

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