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4. Seismology

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  1. 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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  2. 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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  3. 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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  4. 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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  5. 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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  6. 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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  7. 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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  8. 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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  9. 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

  10. 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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  11. 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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  12. 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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  13. 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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  14. 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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  15. 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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  16. 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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