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4. Seismology

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  1. Content type: Full paper

    The effects of the short-wavelength heterogeneity of the crustal structure on predicted ground motion at periods of 1 s and longer were investigated by conducting three-dimensional finite-difference simulation...

    Authors: Asako Iwaki, Takahiro Maeda, Nobuyuki Morikawa, Shunsuke Takemura and Hiroyuki Fujiwara

    Citation: Earth, Planets and Space 2018 70:156

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  2. Content type: Express Letter

    We conducted high-resolution reflection analysis of data from 168 seismic stations with an average spacing of about 5 km, in northern Kinki district, southwestern Japan. Reflection analysis has previously been...

    Authors: Shinya Katoh, Yoshihisa Iio, Hiroshi Katao, Masayo Sawada, Kazuhide Tomisaka, Tsutomu Miura and Itaru Yoneda

    Citation: Earth, Planets and Space 2018 70:149

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  3. Content type: Express Letter

    We discovered a secular change in the travel time of direct S-waves over a 10-year observation period by means of continuous operation of an artificial and stable seismic source, called Accurately Controlled R...

    Authors: Shuhei Tsuji, Koshun Yamaoka, Ryoya Ikuta, Takahiro Kunitomo, Toshiki Watanabe, Yasuhiro Yoshida and Akio Katsumata

    Citation: Earth, Planets and Space 2018 70:146

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  4. Content type: Full paper

    In contrast to surface observation of complex earthquake faults, simple fault-plane models are frequently sufficient to fit geophysical data of seismic wave or crustal deformation. However, earthquake occurren...

    Authors: Yuta Mitsui

    Citation: Earth, Planets and Space 2018 70:136

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  5. Content type: Full paper

    Seismic refraction and multi-channel seismic reflection surveys were conducted on the northeastern Hawaiian Arch to examine the effect of hotspot volcanism on the seismic structure of the crust and uppermost m...

    Authors: Akane Ohira, Shuichi Kodaira, Gregory F. Moore, Mikiya Yamashita, Toshiya Fujiwara, Yuka Kaiho, Seiichi Miura and Gou Fujie

    Citation: Earth, Planets and Space 2018 70:121

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  6. Content type: Full paper

    In order to investigate the seismic velocity structure in the region of concentrated severe damage during the 2016 Kumamoto earthquake sequence, we conducted continuous seismic observations in the central area...

    Authors: Takumi Hayashida, Masumi Yamada, Masayuki Yamada, Koji Hada, Jim Mori, Yoshinori Fujino, Hiromu Sakaue, Sosuke Fukatsu, Eiko Nishihara, Toru Ouchi and Akio Fujii

    Citation: Earth, Planets and Space 2018 70:116

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  7. Content type: Frontier letter

    The uppermost structures of incoming oceanic plates have been investigated by seismic exploration surveys, primarily based on two-dimensional profiles. However, their regional-scale lateral variations and shea...

    Authors: Takashi Tonegawa, Koichiro Obana, Gou Fujie and Shuichi Kodaira

    Citation: Earth, Planets and Space 2018 70:106

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  8. Content type: Full paper

    The data provided by ten DONET deep-sea observatories, that on March 11, 2011, registered the Great East Japan Earthquake and tsunami, were used for investigation of the relationship between variations of the ...

    Authors: Mikhail Nosov, Viacheslav Karpov, Sergey Kolesov, Kirill Sementsov, Hiroyuki Matsumoto and Yoshiyuki Kaneda

    Citation: Earth, Planets and Space 2018 70:100

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  9. Content type: Express Letter

    Seismic wave propagation from shallow subduction-zone earthquakes can be strongly affected by 3D heterogeneous structures, such as oceanic water and sedimentary layers with irregular thicknesses. Synthetic wav...

    Authors: Taro Okamoto, Hiroshi Takenaka and Takeshi Nakamura

    Citation: Earth, Planets and Space 2018 70:98

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  10. Content type: Full paper

    Because the maximum temperature reached in the slip zone is significant information for understanding slip behaviors during an earthquake, the maturity of carbonaceous material (CM) is widely used as a proxy f...

    Authors: Shunya Kaneki and Tetsuro Hirono

    Citation: Earth, Planets and Space 2018 70:92

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  11. Content type: Full paper

    Tectonic and volcanic structures of the northern Ryukyu arc are investigated on the basis of multichannel seismic (MCS) reflection data. The study area forms an active volcanic front in parallel to the non-vol...

    Authors: Ryuta Arai, Shuichi Kodaira, Tsutomu Takahashi, Seiichi Miura and Yoshiyuki Kaneda

    Citation: Earth, Planets and Space 2018 70:61

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  12. Content type: Full paper

    Spatial and temporal variations in inland crustal stress prior to the 2011 Mw 9.0 Tohoku earthquake are investigated using focal mechanism solutions for shallow seismicity in Iwaki City, Japan. The multiple in...

    Authors: Makoto Otsubo, Ayumu Miyakawa and Kazutoshi Imanishi

    Citation: Earth, Planets and Space 2018 70:51

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  13. Content type: Full paper

    The southeast offshore Mie earthquake occurred on April 1, 2016 near the rupture area of the 1944 Tonankai earthquake, where seismicity around the interface of the Philippine Sea plate had been very low until ...

    Authors: Shunsuke Takemura, Takeshi Kimura, Tatsuhiko Saito, Hisahiko Kubo and Katsuhiko Shiomi

    Citation: Earth, Planets and Space 2018 70:50

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  14. Content type: Full paper

    Understanding variations of slip distance along major thrust systems at convergent margins is an important issue for evaluation of near-trench slip and the potential generation of large tsunamis. We derived qu...

    Authors: Hideki Mukoyoshi, Shunya Kaneki and Tetsuro Hirono

    Citation: Earth, Planets and Space 2018 70:36

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  15. Content type: Full paper

    Seismic attenuation properties were tested as indicators of lateral variation in geological structures and detection of faults within poorly reflective oceanic crust, on a seismic survey line along the Nankai ...

    Authors: Tetsuro Tsuru, Jin-Oh Park, Tetsuo No, Yukari Kido and Kazuo Nakahigashi

    Citation: Earth, Planets and Space 2018 70:31

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  16. Content type: Full paper

    We examined the spatial relationship between seismicity and upper crustal structure in the Wakayama region, northwestern Kii Peninsula, Japan, by investigating microearthquake focal mechanisms and the local st...

    Authors: Sumire Maeda, Toru Matsuzawa, Shinji Toda, Keisuke Yoshida and Hiroshi Katao

    Citation: Earth, Planets and Space 2018 70:21

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  17. Content type: Express Letter

    A continuous water injection test was conducted to halt the reduction in steam production in the Okuaizu Geothermal Field, Japan. Understanding the factors triggering microseismicity associated with water inje...

    Authors: Kyosuke Okamoto, Li Yi, Hiroshi Asanuma, Takashi Okabe, Yasuyuki Abe and Masatoshi Tsuzuki

    Citation: Earth, Planets and Space 2018 70:15

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  18. Content type: Full paper

    We have been discussing the validity of using the horizontal-to-vertical spectral ratios (HVRs) as a substitute for S-wave amplifications after Nakamura first proposed the idea in 1989. So far a formula for HV...

    Authors: Hiroshi Kawase, Yuta Mori and Fumiaki Nagashima

    Citation: Earth, Planets and Space 2018 70:1

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  19. Content type: Full paper

    This paper reviews seismic activity in and around the Kumamoto region before and after the April 16, 2016, Kumamoto earthquake of M7.3 using statistical models such as stationary, two-stage, and non-stationary...

    Authors: Takao Kumazawa, Yosihiko Ogata and Hiroshi Tsuruoka

    Citation: Earth, Planets and Space 2017 69:169

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  20. Content type: Full paper

    The Gravity Recovery and Climate Experiment (GRACE) has monitored global gravity changes since 2002. Gravity changes are considered to represent hydrological water mass movements around the surface of the glob...

    Authors: Yuta Mitsui and Kyohei Yamada

    Citation: Earth, Planets and Space 2017 69:166

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  21. Content type: Express Letter

    The 1906 Colombia–Ecuador earthquake induced both strong seismic motions and a tsunami, the most destructive earthquake in the history of the Colombia–Ecuador subduction zone. The tsunami propagated across the...

    Authors: Yusuke Yamanaka, Yuichiro Tanioka and Takahiro Shiina

    Citation: Earth, Planets and Space 2017 69:163

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  22. Content type: Full paper

    Under the diffuse field approximation, the full-wave (FW) microtremor H/V spectral ratio (H/V) is modeled as the square root of the ratio of the sum of imaginary parts of the Green’s function of the horizontal co...

    Authors: Hao Wu, Kazuaki Masaki, Kojiro Irikura and Francisco José Sánchez-Sesma

    Citation: Earth, Planets and Space 2017 69:162

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  23. Content type: Technical report

    We present a non-stationary epidemic-type aftershock sequence (ETAS) model in which the usual assumption of stationary background rate is relaxed. Such a model could be used for modeling seismic sequences affe...

    Authors: Sasi Kattamanchi, Ram Krishna Tiwari and Durbha Sai Ramesh

    Citation: Earth, Planets and Space 2017 69:157

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  24. Content type: Full paper

    To understand the fault zone fluid flow-like structure, namely the ductile deformation structure, often observed in the geological field (e.g., Ramsay and Huber The techniques of modern structure geology, vol....

    Authors: H. Tanaka, Y. Shiomi and K.-F. Ma

    Citation: Earth, Planets and Space 2017 69:151

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  25. Content type: Full paper

    Using 3-D dynamic rupture simulations, we investigated the 2016 Mw7.1 Kumamoto, Japan, earthquake to elucidate why and how the rupture of the main shock propagated successfully, assuming a complicated fault geome...

    Authors: Yumi Urata, Keisuke Yoshida, Eiichi Fukuyama and Hisahiko Kubo

    Citation: Earth, Planets and Space 2017 69:150

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  26. Content type: Full paper

    Using data from high-density seismic observation networks installed in the western Nagano Prefecture region in Japan, we precisely determined focal mechanisms and estimated the high-resolution stress field at ...

    Authors: Yoshihisa Iio, Itaru Yoneda, Masayo Sawada, Tsutomu Miura, Hiroshi Katao, Yoichiro Takada, Kentaro Omura and Shigeki Horiuchi

    Citation: Earth, Planets and Space 2017 69:144

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    The Correction to this article has been published in Earth, Planets and Space 2018 70:20

  27. Content type: Full paper

    The 1703 Genroku Kanto earthquake and the resulting tsunami caused catastrophic damage in the Kanto region of Japan. Previous modeling of the 1703 earthquake applied inversion analyses of the observed terrestr...

    Authors: Hideaki Yanagisawa and Kazuhisa Goto

    Citation: Earth, Planets and Space 2017 69:136

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  28. Content type: Full paper

    The aim of this paper is to investigate the ability of various site-condition proxies (SCPs) to reduce ground-motion aleatory variability and evaluate how SCPs capture nonlinearity site effects. The SCPs used ...

    Authors: Boumédiène Derras, Pierre-Yves Bard and Fabrice Cotton

    Citation: Earth, Planets and Space 2017 69:133

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  29. Content type: Full paper

    In Taiwan, the Nantou area is a seismically active region where several moderate events have occurred, causing some disasters during the past century. Here, we applied the strong ground motion simulation with...

    Authors: Yi-Ying Wen, Shen-Yu Chao, Yin-Tung Yen and Strong Wen

    Citation: Earth, Planets and Space 2017 69:132

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  30. Content type: Express Letter

    The source rupture process of the 2016 central Tottori, Japan, earthquake (M JMA 6.6) was estimated from strong motion waveforms using a multiple-time-window kinematic waveform inversion. ...

    Authors: Hisahiko Kubo, Wataru Suzuki, Shin Aoi and Haruko Sekiguchi

    Citation: Earth, Planets and Space 2017 69:127

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  31. Content type: Full paper

    Although rotational seismology has progressed in recent decades, the links between rotational ground motion and site soil conditions are poorly documented. New experiments were performed on Kefalonia Island (G...

    Authors: Sarah Sbaa, Fabrice Hollender, Vincent Perron, Afifa Imtiaz, Pierre-Yves Bard, Armand Mariscal, Alain Cochard and Alain Dujardin

    Citation: Earth, Planets and Space 2017 69:124

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  32. Content type: Express Letter

    We estimated the location and magnitude of earthquakes constituting the 1858 earthquake swarm in the central Ryukyu Islands using the felt earthquakes recorded by Father Louis Furet who lived in Naha, Okinawa ...

    Authors: Takuma Oda and Mamoru Nakamura

    Citation: Earth, Planets and Space 2017 69:121

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  33. Content type: Express Letter

    We determined the three-dimensional structure of the crust and upper mantle off the Boso Peninsula, Japan, by analyzing seismograms recorded by ocean-bottom seismometers and land stations between 2011 and 2013...

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

    Citation: Earth, Planets and Space 2017 69:118

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