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4. Seismology

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  1. By applying conventional cross-track InSAR and multiple-aperture InSAR (MAI) techniques with ALOS-2 SAR data to foreshocks of the 2016 Kumamoto earthquake, ground displacement fields in range (line-of-sight) a...

    Authors: Tomokazu Kobayashi

    Citation: Earth, Planets and Space 2017 69:7

    Content type: Letter

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  2. We resolve the density structure of a possible magma reservoir beneath Aso, an active volcano on Kyushu Island, Japan, by inverting gravity data. In the context of the resolved structure, we discuss the relati...

    Authors: Ayumu Miyakawa, Tatsuya Sumita, Yasukuni Okubo, Ryo Okuwaki, Makoto Otsubo, Shimpei Uesawa and Yuji Yagi

    Citation: Earth, Planets and Space 2016 68:208

    Content type: Letter

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  3. Shallow S-wave velocity V S profiles were estimated for 26 temporary strong motion observation sites surrounding the epicenters of a sequence of the 2016 Kumamoto earthquake. The microtrem...

    Authors: Kosuke Chimoto, Hiroaki Yamanaka, Seiji Tsuno, Hiroe Miyake and Nobuyuki Yamada

    Citation: Earth, Planets and Space 2016 68:206

    Content type: Letter

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  4. High-amplitude seismic waves from the Mw 7.0 Kumamoto earthquake of April 16, 2016, triggered another large earthquake 80 km to the NE roughly 30 s later. The source was located at shallow depths beneath the Y...

    Authors: Masatoshi Miyazawa

    Citation: Earth, Planets and Space 2016 68:205

    Content type: Letter

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  5. At the 2016 Kumamoto earthquake, surface ruptures were observed not only along the Futagawa fault, where main ruptures occurred, but also along the Hinagu fault. To estimate the slip distribution on these faul...

    Authors: Yukitoshi Fukahata and Manabu Hashimoto

    Citation: Earth, Planets and Space 2016 68:204

    Content type: Full paper

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  6. The 2016 Kumamoto earthquake (Kumamoto earthquake sequence) is an extremely high-seismicity event that has been occurring across Kumamoto and Oita Prefectures in Japan since April 14, 2016 (JST). The earthquak...

    Authors: Yuki Kodera, Jun Saitou, Naoki Hayashimoto, Shimpei Adachi, Masahiko Morimoto, Yuji Nishimae and Mitsuyuki Hoshiba

    Citation: Earth, Planets and Space 2016 68:202

    Content type: Full paper

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  7. An earthquake of JMA magnitude 6.5 (first event) hit Kumamoto Prefecture, Japan, at 21:26 JST, April 14, 2016. Subsequently, an earthquake of JMA magnitude 7.3 (second event) hit Kumamoto and Oita Prefectures...

    Authors: Yoshiya Hata, Masaaki Yabe, Akira Kasai, Hiroshi Matsuzaki, Yoshikazu Takahashi and Mitsuyoshi Akiyama

    Citation: Earth, Planets and Space 2016 68:199

    Content type: Letter

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  8. We conduct waveform inversion to infer the three-dimensional (3-D) S-velocity structure in the lowermost 400 km of the mantle (the D′′ region) beneath the Northern Pacific region. Our dataset consists of about...

    Authors: Yuki Suzuki, Kenji Kawai, Robert J. Geller, Anselme F. E. Borgeaud and Kensuke Konishi

    Citation: Earth, Planets and Space 2016 68:198

    Content type: Frontier letter

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  9. We have conducted observation of earthquake ground motion due to aftershocks of the 2016 Kumamoto earthquake at 26 temporary stations in damaged areas of Kumamoto city, Mashiki town, Nishihara village and Mina...

    Authors: Hiroaki Yamanaka, Kosuke Chimoto, Hiroe Miyake, Seiji Tsuno and Nobuyuki Yamada

    Citation: Earth, Planets and Space 2016 68:197

    Content type: Letter

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  10. A rupture model with varying rupture front expansion velocity for the March 11, 2011, Tohoku-Oki earthquake was obtained by the joint inversion of high-rate Global Positioning System (GPS) data and ocean botto...

    Authors: Zhen Wang, Teruyuki Kato, Xin Zhou and Jun’ichi Fukuda

    Citation: Earth, Planets and Space 2016 68:193

    Content type: Full paper

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  11. The 2016 Kumamoto earthquake sequence started with a M J (Japan Meteorological Agency magnitude) 6.5 event on April 14, and culminated in a M J 7.3 event on April 1...

    Authors: Yoshiki Shirahama, Masayuki Yoshimi, Yasuo Awata, Tadashi Maruyama, Takashi Azuma, Yukari Miyashita, Hiroshi Mori, Kazutoshi Imanishi, Naoto Takeda, Tadafumi Ochi, Makoto Otsubo, Daisuke Asahina and Ayumu Miyakawa

    Citation: Earth, Planets and Space 2016 68:191

    Content type: Letter

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  12. We estimate high-frequency (4–20 Hz) energy release due to the 2016 Kumamoto, Japan, earthquake sequence, within a time period from April 14 to 26 through envelope inversion analysis applied to the Hi-net cont...

    Authors: Kaoru Sawazaki, Hisashi Nakahara and Katsuhiko Shiomi

    Citation: Earth, Planets and Space 2016 68:183

    Content type: Full paper

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  13. An ENE-trending ~30-km-long surface rupture emerged during the Mw = 7.0 16 April 2016 Kumamoto earthquake along the previously mapped Futagawa and northern Hinagu faults. This included a previously unknown 5-k...

    Authors: Shinji Toda, Heitaro Kaneda, Shinsuke Okada, Daisuke Ishimura and Zoë K. Mildon

    Citation: Earth, Planets and Space 2016 68:188

    Content type: Frontier letter

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  14. We report precursory seismic patterns prior to the 2016 Kumamoto earthquakes, as measured by four different methods based on changes in seismicity that can be used for earthquake forecasting: the b-value method, ...

    Authors: Kazuyoshi Z. Nanjo, Jun Izutsu, Yoshiaki Orihara, Nobuhiro Furuse, Shoho Togo, Hidetoshi Nitta, Tomohiro Okada, Rika Tanaka, Masashi Kamogawa and Toshiyasu Nagao

    Citation: Earth, Planets and Space 2016 68:187

    Content type: Full paper

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  15. The 2016 Kumamoto–Oita earthquake sequence involving three large events (M w ≥ 6) in the central Kyushu Island, southwest Japan, activated seismicities in two volcanic areas with unusual a...

    Authors: Takahiko Uchide, Haruo Horikawa, Misato Nakai, Reiken Matsushita, Norio Shigematsu, Ryosuke Ando and Kazutoshi Imanishi

    Citation: Earth, Planets and Space 2016 68:180

    Content type: Letter

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  16. The 2016 Kumamoto earthquake sequence was a rare event worldwide in that the surface ruptures associated with the largest foreshock (Mj 6.5) of 21:26 (JST), 14 April ruptured again during the mainshock (Mj 7.3...

    Authors: Nobuhiko Sugito, Hideaki Goto, Yasuhiro Kumahara, Hiroyuki Tsutsumi, Takashi Nakata, Kyoko Kagohara, Nobuhisa Matsuta and Haruka Yoshida

    Citation: Earth, Planets and Space 2016 68:170

    Content type: Letter

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  17. We analyze Bouguer anomalies in/around the focal region of the 2016 Kumamoto earthquake to examine features, such as continuity, segmentation and faulting type, of the active fault zones related to the earthqu...

    Authors: Nayuta Matsumoto, Hiramatsu Yoshihiro and Akihiro Sawada

    Citation: Earth, Planets and Space 2016 68:167

    Content type: Letter

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    The Erratum to this article has been published in Earth, Planets and Space 2017 69:47

  18. Frequency-dependent model of the apparent radiation pattern has been extensively incorporated into engineering and scientific applications for high-frequency seismic waves, but distance-dependent properties ha...

    Authors: Shunsuke Takemura, Manabu Kobayashi and Kazuo Yoshimoto

    Citation: Earth, Planets and Space 2016 68:166

    Content type: Letter

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  19. The MJMA7.3 Kumamoto earthquake occurred on April 16, 2016, in the western part of Kyushu, at a depth of 12 km, on an active strike-slip fault. Here, we report on a relatively widespread activation of small remot...

    Authors: Bogdan Enescu, Kengo Shimojo, Anca Opris and Yuji Yagi

    Citation: Earth, Planets and Space 2016 68:165

    Content type: Full paper

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  20. Time-lapse monitoring of seismic velocity at volcanic areas can provide unique insight into the property of hydrothermal and magmatic fluids and their temporal variability. We established a quasi real-time vel...

    Authors: Taka’aki Taira and Florent Brenguier

    Citation: Earth, Planets and Space 2016 68:162

    Content type: Frontier letter

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  21. The detailed source rupture process of the M 7.3 event (April 16, 2016, 01:25, JST) of the 2016 Kumamoto, Japan, earthquakes was derived from strong-motion waveforms using multiple-time-window linear waveform inv...

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

    Citation: Earth, Planets and Space 2016 68:161

    Content type: Letter

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  22. We constructed and analyzed the ground surface displacement associated with the 2016 Kumamoto earthquake sequence using satellite radar interferometry images of the Advanced Land Observing Satellite 2. The ra...

    Authors: Satoshi Fujiwara, Hiroshi Yarai, Tomokazu Kobayashi, Yu Morishita, Takayuki Nakano, Basara Miyahara, Hiroyuki Nakai, Yuji Miura, Haruka Ueshiba, Yasuaki Kakiage and Hiroshi Une

    Citation: Earth, Planets and Space 2016 68:160

    Content type: Full Paper

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  23. In this study, the original seismograms of the 1935-Erdek–Marmara Island and 1963-Çınarcık Earthquakes, recorded at local and regional distances, were vectorized. The epicentral locations have been calculated ...

    Authors: Nilay Başarır Baştürk, Nurcan Meral Özel and Marco Caciagli

    Citation: Earth, Planets and Space 2016 68:158

    Content type: Full paper

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  24. We estimated the dip distribution of Oita–Kumamoto Tectonic Line located in central Kyushu, Japan, by using the dip of the maximum eigenvector of the gravity gradient tensor. A series of earthquakes in Kumamo...

    Authors: Shigekazu Kusumoto

    Citation: Earth, Planets and Space 2016 68:153

    Content type: Letter

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  25. Systematic difference between first-motion and waveform-inversion solutions for shallow offshore earthquakes was examined by using the seismograms of the 2016 Off Mie (Mw 5.8) earthquake occurred at a depth of 14...

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

    Citation: Earth, Planets and Space 2016 68:149

    Content type: Letter

    Published on:

  26. The 2016 Kumamoto earthquake sequence started with an MJMA 6.5 foreshock occurring along the northern part of the Hinagu fault, central Kyushu, Japan, and the MJMA 7.3 mainshock occurred just 28 h after the fores...

    Authors: Kimiyuki Asano and Tomotaka Iwata

    Citation: Earth, Planets and Space 2016 68:147

    Content type: Frontier letter

    Published on:

  27. The main motivation for this study was the impending occurrence of a catastrophic earthquake along the Prince Island Fault (PIF) in the Marmara Sea and the disaster risk around the Marmara region, especially i...

    Authors: Aydin Mert, Yasin M. Fahjan, Lawrence J. Hutchings and Ali Pınar

    Citation: Earth, Planets and Space 2016 68:146

    Content type: Full paper

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  28. Turkey is highly prone to earthquakes because of active fault zones in the region. The Marmara region located at the western extension of the North Anatolian Fault Zone (NAFZ) is one of the most tectonically a...

    Authors: Betul Aytore, Ahmet Cevdet Yalciner, Andrey Zaytsev, Zeynep Ceren Cankaya and Mehmet Lütfi Suzen

    Citation: Earth, Planets and Space 2016 68:139

    Content type: Frontier letter

    Published on:

  29. Istanbul is a mega city with various coastal utilities located on the northern coast of the Sea of Marmara. At Yenikapı, there are critical vulnerable coastal utilities, structures, and active metropolitan lif...

    Authors: Zeynep Ceren Cankaya, Mehmet Lutfi Suzen, Ahmet Cevdet Yalciner, Cagil Kolat, Andrey Zaytsev and Betul Aytore

    Citation: Earth, Planets and Space 2016 68:133

    Content type: Full paper

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  30. We investigated the crustal structure beneath the Marmara region and the surrounding area in the western part of the North Anatolian fault zone. These areas have high seismicity and are of critical significanc...

    Authors: Gulten Polat, Nurcan Meral Özel and Ivan Koulakov

    Citation: Earth, Planets and Space 2016 68:132

    Content type: Full paper

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  31. The interferometric SAR coherence-change technique with coherence filter and polarization (HH and HV) has been used to detect the parts of buildings damaged by the 2015 Gorkha Earthquake. A survey of the build...

    Authors: Manabu Watanabe, Rajesh Bahadur Thapa, Tsuneo Ohsumi, Hiroyuki Fujiwara, Chinatsu Yonezawa, Naoya Tomii and Sinichi Suzuki

    Citation: Earth, Planets and Space 2016 68:131

    Content type: Full paper

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  32. We developed a real-time tsunami forecast method using only pressure data collected from the bottom of the ocean via a dense offshore observation network. The key feature of the method is rapid matching betwee...

    Authors: Naotaka Yamamoto, Shin Aoi, Kenji Hirata, Wataru Suzuki, Takashi Kunugi and Hiromitsu Nakamura

    Citation: Earth, Planets and Space 2016 68:128

    Content type: Full paper

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  33. We constructed the rupture process model for the 2016 Kumamoto, Japan, earthquake from broadband teleseismic body waveforms (P-waves) by using a novel waveform inversion method that takes into account the unce...

    Authors: Yuji Yagi, Ryo Okuwaki, Bogdan Enescu, Amato Kasahara, Ayumu Miyakawa and Makoto Otsubo

    Citation: Earth, Planets and Space 2016 68:118

    Content type: Frontier letter

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  34. We performed a damage survey of buildings and carried out microtremor observations in the source region of the 2015 Gorkha earthquake. Our survey area spans the Kathmandu valley and areas to the east and north...

    Authors: Masumi Yamada, Takumi Hayashida, Jim Mori and Walter D. Mooney

    Citation: Earth, Planets and Space 2016 68:117

    Content type: Letter

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  35. Recent advances in computing have brought a new and challenging way to tackle the earthquake hazard and disaster problems: integration of the seismic actions in the form of numerical models. For this purpose,...

    Authors: Abdurrahman Sahin, Rafet Sisman, Aysegul Askan and Muneo Hori

    Citation: Earth, Planets and Space 2016 68:115

    Content type: Full paper

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  36. Surface wave analysis generally neglects amplitude information, instead using phase information to delineate near-surface S-wave velocity structures. To effectively characterize subsurface heterogeneities from...

    Authors: Tatsunori Ikeda and Takeshi Tsuji

    Citation: Earth, Planets and Space 2016 68:111

    Content type: Full Paper

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  37. Distinct reflected waves (S × S) are observed in the northern Kinki district, southwestern Japan. We conducted a high-resolution reflection analysis by using data from 128 seismic stations with an average spac...

    Authors: Sho Aoki, Yoshihisa Iio, Hiroshi Katao, Tsutomu Miura, Itaru Yoneda and Masayo Sawada

    Citation: Earth, Planets and Space 2016 68:107

    Content type: Letter

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  38. In this study, a method for simulating the ground motion of megathrust earthquakes at periods of approximately 2 s and longer was validated by using the characterized source model combined with multi-scale spa...

    Authors: Asako Iwaki, Takahiro Maeda, Nobuyuki Morikawa, Shin Aoi and Hiroyuki Fujiwara

    Citation: Earth, Planets and Space 2016 68:95

    Content type: Full paper

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