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4. Seismology

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  1. The geometries (i.e., dip angles) of active faults from the surface to the seismogenic zone are the most important factors used to evaluate earthquake ground motion, which is crucial for seismic hazard assessm...

    Authors: Hayami Nishiwaki, Takamoto Okudaira, Kazuhiko Ishii and Muneki Mitamura

    Citation: Earth, Planets and Space 2021 73:86

    Content type: Full paper

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  2. Late Quaternary tectonic deformation of coastal areas is usually examined based on the height distribution of paleo-shorelines observed on marine terraces. However, it is difficult to examine deformation along...

    Authors: Hideaki Goto

    Citation: Earth, Planets and Space 2021 73:75

    Content type: Express Letter

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  3. Tsunami hazard in the Eastern Mediterranean Basin (EMB) has attracted attention following three tsunamis in this basin since 2017 namely the July 2017 and October 2020 Turkey/Greece and the May 2020 offshore C...

    Authors: Mohammad Heidarzadeh and Aditya Riadi Gusman

    Citation: Earth, Planets and Space 2021 73:74

    Content type: Full paper

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  4. A tsunami earthquake is an earthquake event that generates abnormally high tsunami waves considering the amplitude of the seismic waves. These abnormally high waves relative to the seismic wave amplitude are r...

    Authors: Akio Katsumata, Masayuki Tanaka and Takahito Nishimiya

    Citation: Earth, Planets and Space 2021 73:72

    Content type: Full paper

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  5. Distributed acoustic sensing (DAS) is a new method that measures the strain change along a fiber-optic cable and has emerged as a promising geophysical application across a wide range of research and monitorin...

    Authors: Satoshi Ide, Eiichiro Araki and Hiroyuki Matsumoto

    Citation: Earth, Planets and Space 2021 73:63

    Content type: Express Letter

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  6. Slip phenomena on plate interfaces reflect the heterogeneous physical properties of the slip plane and, thus, exhibit a wide variety of slip velocities and rupture propagation behaviors. Recent findings on slo...

    Authors: Keita Nakamoto, Yoshihiro Hiramatsu, Takahiko Uchide and Kazutoshi Imanishi

    Citation: Earth, Planets and Space 2021 73:59

    Content type: Full paper

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  7. The Mw7.0 2016 Kumamoto earthquake occurred on the previously mapped Futagawa–Hinagu fault causing significant strong ground motions. A ~ 30-km-long dextral surface rupture appeared on the major fault zone and...

    Authors: Daisuke Ishimura, Hiroyuki Tsutsumi, Shinji Toda, Yo Fukushima, Yasuhiro Kumahara, Naoya Takahashi, Toshihiko Ichihara and Keita Takada

    Citation: Earth, Planets and Space 2021 73:39

    Content type: Full paper

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  8. The Seafloor Observation Network for Earthquakes and Tsunamis along the Japan Trench (S-net) is presently the world’s largest network of ocean bottom pressure sensors for real-time tsunami monitoring. This pap...

    Authors: Iyan E. Mulia and Kenji Satake

    Citation: Earth, Planets and Space 2021 73:36

    Content type: Full paper

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    The Correction to this article has been published in Earth, Planets and Space 2021 73:69

  9. Distinct later phases of waves with rich high-frequency (> 8 Hz) components were observed for intraslab earthquakes that occurred at intermediate depths, particularly at depths exceeding 100 km, in the northea...

    Authors: Takahiro Shiina, Kei Katsumata, Kiyoshi Yomogida and Aitaro Kato

    Citation: Earth, Planets and Space 2021 73:33

    Content type: Full paper

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  10. Although seismic amplitudes can be used to estimate event locations for volcanic tremors and other seismic events with unclear phase arrival times, the precision of such estimates is strongly affected by site ...

    Authors: Masashi Ogiso and Kiyoshi Yomogida

    Citation: Earth, Planets and Space 2021 73:29

    Content type: Full paper

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  11. Laboratory experiments with seismic measurements have the potential to be highly useful for understanding the physical process of water-induced landslides, and fundamental experiments are helpful for the appro...

    Authors: Masayuki Nakayama, Hironori Kawakata, Shiro Hirano and Issei Doi

    Citation: Earth, Planets and Space 2021 73:25

    Content type: Technical report

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  12. The east coast of the Tohoku district, Japan has a high seismicity, including aftershocks of the 2011 M9 Tohoku earthquake. We analyzed 1142 earthquakes with http://static-content.springer.com/image/art%3A10.1186%2Fs40623-020-01326-8/40623_2020_1326_Article_IEq1.gif

    Authors: Takuji Yamada, Meitong Duan and Jun Kawahara

    Citation: Earth, Planets and Space 2021 73:18

    Content type: Full paper

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  13. We propose a new waveform inversion method to estimate the 2D S-wave velocity structure of deep sedimentary layers using broadband Love waves. As a preprocessing operation in our inversion scheme, we decompose...

    Authors: Kentaro Kasamatsu, Hiroaki Yamanaka and Shin’ichi Sakai

    Citation: Earth, Planets and Space 2021 73:17

    Content type: Full paper

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  14. We conducted centroid moment tensor (CMT) inversions of moderate (Mw 4.5–6.5) earthquakes in the Kanto region, Japan, using a local three-dimensional (3D) model. We then investigated the effects of our 3D CMT sol...

    Authors: Shunsuke Takemura, Kazuo Yoshimoto and Katsuhiko Shiomi

    Citation: Earth, Planets and Space 2021 73:15

    Content type: Full paper

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  15. We quantitatively examined the influence of pore fluid pressure and coseismic stress changes on the seismicity rate changes that followed the 2016 Kumamoto earthquake, on the basis of two approaches. One is a ...

    Authors: Kodai Nakagomi, Toshiko Terakawa, Satoshi Matsumoto and Shinichiro Horikawa

    Citation: Earth, Planets and Space 2021 73:11

    Content type: Full paper

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    The Correction to this article has been published in Earth, Planets and Space 2021 73:24

  16. Surface waves from the 2017 Mw8.2 Tehuantepec earthquake remotely triggered tectonic tremors in the Jalisco region, approximately 1000 km WNW in the northern Mexican subduction zone. This is the first observation...

    Authors: Masatoshi Miyazawa and Miguel Ángel Santoyo

    Citation: Earth, Planets and Space 2021 73:6

    Content type: Full paper

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  17. The tectonic stress field was investigated in and around the aftershock area of the Hokkaido Eastern Iburi earthquake (MJMA = 6.7) occurred on 6 September 2018. We deployed 26 temporary seismic stations in the af...

    Authors: Yuki Susukida, Kei Katsumata, Masayoshi Ichiyanagi, Mako Ohzono, Hiroshi Aoyama, Ryo Tanaka, Masamitsu Takada, Teruhiro Yamaguchi, Kazumi Okada, Hiroaki Takahashi, Shin’ichi Sakai, Satoshi Matsumoto, Tomomi Okada, Toru Matsuzawa, Hiroki Miyamachi, Shuichiro Hirano…

    Citation: Earth, Planets and Space 2021 73:1

    Content type: Full paper

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  18. We used near-field strong-motion data to investigate the complex combination of source effect and site response for two recent disastrous earthquakes in southwest Taiwan. We estimated strong-motion generation ...

    Authors: Yi-Ying Wen, Yin-Tung Yen, Chun-Hsiang Kuo and Kuo‐En Ching

    Citation: Earth, Planets and Space 2020 72:188

    Content type: Full paper

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  19. Crustal pore pressure, which controls the activities of earthquakes and volcanoes, varies in response to rainfall. The status of pore pressure can be inferred from observed changes in seismic velocity. In this...

    Authors: Rezkia Dewi Andajani, Takeshi Tsuji, Roel Snieder and Tatsunori Ikeda

    Citation: Earth, Planets and Space 2020 72:177

    Content type: Full paper

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  20. An MW 7.1 ~ 50-km-deep intraslab earthquake within the Pacific/Yakutat slab underlying the North American Plate struck Anchorage, southern Alaska, on November 30, 2018. The ground-motion records very close to the...

    Authors: Yujia Guo, Ken Miyakoshi and Masato Tsurugi

    Citation: Earth, Planets and Space 2020 72:176

    Content type: Full paper

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  21. The COVID-19 pandemic that started at the end of 2019 forced populations around the world to reduce social and economic activities; it is believed that this can prevent the spread of the disease. In this paper...

    Authors: Suguru Yabe, Kazutoshi Imanishi and Kiwamu Nishida

    Citation: Earth, Planets and Space 2020 72:167

    Content type: Full paper

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  22. Sediment lithology, especially the clay mineral fraction, is basic geologic information, which is important for understanding faulting and evolutionary process of the accretionary prism. During scientific dril...

    Authors: Suguru Yabe, Rina Fukuchi, Yohei Hamada and Gaku Kimura

    Citation: Earth, Planets and Space 2020 72:166

    Content type: Full paper

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  23. Postseismic Global Navigation Satellite System (GNSS) time series followed by megathrust earthquakes can be interpreted as a result of afterslip on the plate interface, especially in its early phase. Afterslip...

    Authors: Masayuki Kano, Shin’ichi Miyazaki, Yoichi Ishikawa and Kazuro Hirahara

    Citation: Earth, Planets and Space 2020 72:159

    Content type: Full paper

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  24. A driving stress of the Mw5.8 reverse-faulting Awaji Island earthquake (2013), southwest Japan, was investigated using focal mechanism solutions of earthquakes before and after the mainshock. The seismic records ...

    Authors: Kazutoshi Imanishi, Makiko Ohtani and Takahiko Uchide

    Citation: Earth, Planets and Space 2020 72:158

    Content type: Full paper

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  25. We propose a normal-stress-dependent Nagata law. Nagata et al. (J Geophys Res 117:B02314, 2012) revised the rate- and state-dependent friction law by introducing the shear stress dependence. We further extende...

    Authors: Shingo Yoshida, Takuto Maeda and Naoyuki Kato

    Citation: Earth, Planets and Space 2020 72:141

    Content type: Full paper

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  26. We have identified “N”-shaped Y/X amplitude spectral ratios in S-coda records from a significant number of OBSs (ocean bottom seismometers) belonging to in-line-type ocean bottom networks of S-net and ETMC dep...

    Authors: Kaoru Sawazaki and Takeshi Nakamura

    Citation: Earth, Planets and Space 2020 72:130

    Content type: Full paper

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  27. To improve our understanding of the long-term behavior of low-frequency earthquakes (LFEs) along the tremor belt of the Nankai subduction zone, we applied a matched filter technique to continuous seismic data ...

    Authors: Aitaro Kato and Shigeki Nakagawa

    Citation: Earth, Planets and Space 2020 72:128

    Content type: Express Letter

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  28. National Research Institute for Earth Science and Disaster Resilience (NIED) integrated the land observation networks established since the 1995 Kobe earthquake with the seafloor observation networks establish...

    Authors: Shin Aoi, Youichi Asano, Takashi Kunugi, Takeshi Kimura, Kenji Uehira, Narumi Takahashi, Hideki Ueda, Katsuhiko Shiomi, Takumi Matsumoto and Hiroyuki Fujiwara

    Citation: Earth, Planets and Space 2020 72:126

    Content type: Frontier letter

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  29. We analyze the regional tsunami hazard along the Sea of Japan coast associated with 60 active faults beneath the eastern margin of the Sea of Japan. We generate stochastic slip distribution using a Monte Carlo...

    Authors: Iyan E. Mulia, Takeo Ishibe, Kenji Satake, Aditya Riadi Gusman and Satoko Murotani

    Citation: Earth, Planets and Space 2020 72:123

    Content type: Full paper

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  30. Although fluid behavior along faults has often been associated with earthquakes and hydrocarbon accumulation, few observations of active, ongoing fluid discharge along the faults exist. We conducted a dense-2D...

    Authors: Tetsuro Tsuru, Jin-Oh Park, Kazuo Amakasu, Tetsuo No, Kohsaku Arai, Takahiko Inoue, Seishiro Furuyama, Keiichi Uchida and Yasuyuki Nakamura

    Citation: Earth, Planets and Space 2020 72:121

    Content type: Full paper

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  31. Interferograms pertaining to large earthquakes typically reveal the occurrence of elastic deformations caused by the earthquake along with several complex surface displacements. In this study, we identified di...

    Authors: Satoshi Fujiwara, Takayuki Nakano and Yu Morishita

    Citation: Earth, Planets and Space 2020 72:119

    Content type: Frontier letter

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  32. We determined focal mechanism solutions of microearthquakes and examined the stress field in the low-seismicity region from southern Hokkaido to eastern Aomori, NE Japan. The stress fields determined in this s...

    Authors: Sumire Maeda, Toru Matsuzawa, Tomomi Okada, Hiroshi Katao, Takeyoshi Yoshida, Masahiro Kosuga and Makoto Otsubo

    Citation: Earth, Planets and Space 2020 72:117

    Content type: Express Letter

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  33. Deep-sea turbidites have been utilized to understand the history of past large earthquakes. Surface-sediment remobilization is considered to be a mechanism for the initiation of earthquake-induced turbidity cu...

    Authors: Ken Ikehara, Kazuko Usami and Toshiya Kanamatsu

    Citation: Earth, Planets and Space 2020 72:114

    Content type: Full paper

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  34. Several laboratory experimental studies of photoemission characteristics of rocks as they fracture have been conducted to elucidate the mechanism of earthquake lightning (EQL). In most of these studies, granit...

    Authors: Yuji Enomoto, Tsuneaki Yamabe, Kazuyuki Mizuhara, Shigeki Sugiura and Hitoshi Kondo

    Citation: Earth, Planets and Space 2020 72:108

    Content type: Express Letter

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  35. Deep low-frequency tremors and short-term slow slip events (SSEs) are known to occur along the Nankai Trough in Japan. Although short-term SSEs are thought to occur repeatedly in the northern part of Ise Bay, ...

    Authors: Yuichi Kitagawa, Norio Matsumoto and Takeshi Kimura

    Citation: Earth, Planets and Space 2020 72:90

    Content type: Full paper

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  36. The southwestern Kuril trench is seismically active due to the subduction of the Pacific plate. Great earthquakes in this zone have frequently induced fatal disasters. Seismic monitoring and hypocenter catalog...

    Authors: Masayoshi Ichiyanagi, Valentin Mikhaylov, Dmitry Kostylev, Yuri Levin and Hiroaki Takahashi

    Citation: Earth, Planets and Space 2020 72:86

    Content type: Technical report

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  37. To explore a local relationship between geological structures and the occurrence of very-low-frequency earthquakes (VLFEs), a particular class of slow earthquakes with characteristic periods of 10–100 s, we in...

    Authors: Kazuya Shiraishi, Yasuhiro Yamada, Masaru Nakano, Masataka Kinoshita and Gaku Kimura

    Citation: Earth, Planets and Space 2020 72:72

    Content type: Full paper

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