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4. Seismology

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  1. To clarify the relationship between earthquake occurrence and fluid, we analyzed data from a dense aftershock-observation network with 69 high-gain short-period seismographs installed immediately after the mai...

    Authors: Yoshihisa Iio, Satoshi Matsumoto, Yusuke Yamashita, Shin’ichi Sakai, Kazuhide Tomisaka, Masayo Sawada, Takashi Iidaka, Takaya Iwasaki, Megumi Kamizono, Hiroshi Katao, Aitaro Kato, Eiji Kurashimo, Yoshiko Teguri, Hiroo Tsuda and Takashi Ueno

    Citation: Earth, Planets and Space 2020 72:42

    Content type: Express Letter

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  2. We have explored tsunami current signals in maritime Automatic Identification System (AIS) data during the 2011 Tohoku, Japan, tsunami. The AIS data were investigated in detail taking into account ship motion ...

    Authors: Daisuke Inazu, Tsuyoshi Ikeya, Toshio Iseki and Takuji Waseda

    Citation: Earth, Planets and Space 2020 72:41

    Content type: Full paper

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  3. The 2018, Hokkaido Eastern Iburi, Japan, earthquake is an event characterized by complexity of the rupture process and slip pattern, which may involve both reverse and strike-slip motion depending on the locat...

    Authors: Tatsuya Hisakawa, Ryosuke Ando, Tomoko Elizabeth Yano and Makoto Matsubara

    Citation: Earth, Planets and Space 2020 72:36

    Content type: Full paper

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  4. The present study presents the analysis of a moderate earthquake (Mw 4.0) and its largest aftershocks located along the Red Sea coast, southwestern Saudi Arabia, with the aim to understand the enigma of peculi...

    Authors: Ali K. Abdelfattah, Abdullah Al-amri, M. Sami Soliman, Faisal K. Zaidi, Saleh Qaysi, Mohamed Fnais, Sattam Almadani and Nassir Al-Arifi

    Citation: Earth, Planets and Space 2020 72:34

    Content type: Full paper

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  5. The Nankai Trough in Southwest Japan exhibits a wide spectrum of fault slip, with long-term and short-term slow-slip events, slow and fast earthquakes, all associated with different segments down the plate int...

    Authors: Qibin Shi, Sylvain Barbot, Shengji Wei, Paul Tapponnier, Takanori Matsuzawa and Bunichiro Shibazaki

    Citation: Earth, Planets and Space 2020 72:27

    Content type: Full paper

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  6. Six wells were continuously monitored in Hokkaido, northern Japan, to relate groundwater level changes to regional seismic activity. Groundwater level changes following the 2018 Hokkaido Eastern Iburi earthqua...

    Authors: Tomo Shibata, Ryo Takahashi, Hiroaki Takahashi, Takanori Kagoshima, Naoto Takahata, Yuji Sano and Daniele L. Pinti

    Citation: Earth, Planets and Space 2020 72:23

    Content type: Express Letter

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  7. In this study, we investigate the source rupture process of the 2018 Hokkaido Eastern Iburi earthquake in Japan (MJMA 6.7) and how the ground motion can be reproduced using available source and velocity models. F...

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

    Citation: Earth, Planets and Space 2020 72:20

    Content type: Express Letter

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  8. To continuously monitor crustal behavior associated with earthquakes, magmatic activities and other environmental effects (e.g., tides and rain precipitation), we have developed a continuous monitoring system ...

    Authors: Fernando Lawrens Hutapea, Takeshi Tsuji and Tatsunori Ikeda

    Citation: Earth, Planets and Space 2020 72:19

    Content type: Technical report

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  9. We derived a three-dimensional S-wave velocity model for the San-in area of southwest Japan to examine heterogeneous structures such as tectonic faults. Many earthquakes occur in this area, but much of the act...

    Authors: Yudai Suemoto, Tatsunori Ikeda, Takeshi Tsuji and Yoshihisa Iio

    Citation: Earth, Planets and Space 2020 72:15

    Content type: Full paper

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  10. We examined seismic moment release rates as estimated from deep low-frequency tremors at episodic tremor and slip (ETS) zones on the plate interface in the Nankai subduction zone. Excluding periods with long-t...

    Authors: Yoko Kono, Keita Nakamoto and Yoshihiro Hiramatsu

    Citation: Earth, Planets and Space 2020 72:12

    Content type: Express Letter

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  11. We used recently collected bathymetric data and published gravity data to examine the effective elastic thickness of the lithosphere and the crustal thickness beneath the Ojin Rise Seamounts, located east of S...

    Authors: Shoka Shimizu, Masao Nakanishi and Takashi Sano

    Citation: Earth, Planets and Space 2020 72:11

    Content type: Express Letter

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  12. Recent global navigation satellite system (GNSS) data for the Japanese Islands have revealed a high-strain-rate region suggesting the existence of a region of broad-scale crustal deformation. The Niigata–Kobe ...

    Authors: Tomonori Tamura, Kiyokazu Oohashi, Makoto Otsubo, Ayumu Miyakawa and Masakazu Niwa

    Citation: Earth, Planets and Space 2020 72:7

    Content type: Full paper

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  13. The b-value of the Gutenberg–Richter law represents the ratio of earthquake magnitude to frequency of occurrence and is inversely proportional to differential stress. Repeating long-term slow-slip events (SSEs) a...

    Authors: Keita Chiba

    Citation: Earth, Planets and Space 2020 72:3

    Content type: Full paper

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    The Correction to this article has been published in Earth, Planets and Space 2020 72:22

  14. A large Mw 7.5 earthquake occurred at 18.03 on 28 September 2018 in the Donggala–Palu area of Central Sulawesi, Indonesia, which triggered a tsunami, liquefaction, and landslides. A 160-km rupture zone was for...

    Authors: Asri Jaya, Osamu Nishikawa and Sahabuddin Jumadil

    Citation: Earth, Planets and Space 2019 71:144

    Content type: Full paper

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  15. Along subduction interfaces or some major faults, a seismogenic layer in the upper crust is underlain by a zone of slow-slip events (SSEs) and tremors, and seismicity disappears at greater depths. The transiti...

    Authors: Yuki Miyake and Hiroyuki Noda

    Citation: Earth, Planets and Space 2019 71:137

    Content type: Full paper

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  16. We evaluated water distributions in deformed quartz in schists along the Asemi River, Central Shikoku, in the Sanbagawa Metamorphic Belt, Japan, using infrared spectroscopic (IR) mapping. The water trapped in ...

    Authors: Jun-ichi Fukuda and Ichiko Shimizu

    Citation: Earth, Planets and Space 2019 71:136

    Content type: Full paper

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  17. We investigated temporal changes in the waveforms of S-coda from triggered earthquakes around the Moriyoshi-zan volcano in northeastern Japan. Seismicity in the area has drastically increased after the 2011 of...

    Authors: Yuta Amezawa, Masahiro Kosuga and Takuto Maeda

    Citation: Earth, Planets and Space 2019 71:132

    Content type: Full paper

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  18. The large slip along the shallow subduction interface during the 2011 Tohoku-Oki earthquake (Mw9.0) caused a huge tsunami that struck the northeast coast of Honshu, Japan. The Integrated Ocean Drilling Program Ex...

    Authors: Jun Kameda, Masaoki Uno, Marianne Conin, Kohtaro Ujiie, Yohei Hamada and Gaku Kimura

    Citation: Earth, Planets and Space 2019 71:131

    Content type: Full paper

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  19. We applied the epidemic type aftershock sequence (ETAS) model, the two-stage ETAS model and the non-stationary ETAS model to investigate the detailed features of the series of earthquake occurrences before and...

    Authors: Takao Kumazawa, Yosihiko Ogata and Hiroshi Tsuruoka

    Citation: Earth, Planets and Space 2019 71:130

    Content type: Full paper

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  20. Elastic wave velocity and electrical conductivity in a brine-saturated granitic rock were measured under confining pressures of up to 150 MPa and microstructure of pores was examined with SEM on ion-milled sur...

    Authors: Tohru Watanabe, Miho Makimura, Yohei Kaiwa, Guillaume Desbois, Kenta Yoshida and Katsuyoshi Michibayashi

    Citation: Earth, Planets and Space 2019 71:129

    Content type: Full paper

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  21. The 2016 Kumamoto earthquake, whose main shock was an M7.3 event on April 16, 2016, 28 h after a foreshock of M6.5, caused severe damage in and around Kumamoto Prefecture, Japan. It also caused postseismic hyd...

    Authors: Naoji Koizumi, Shinsuke Minote, Tatsuya Tanaka, Azumi Mori, Takumi Ajiki, Tsutomu Sato, Hiroshi A. Takahashi and Norio Matsumoto

    Citation: Earth, Planets and Space 2019 71:128

    Content type: Full paper

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  22. I relocated the hypocenters of the 2018 M6.7 Hokkaido Eastern Iburi earthquake and its surrounding area, using a three-dimensional seismic structure, the double-difference relocation method, and the JMA earthq...

    Authors: Saeko Kita

    Citation: Earth, Planets and Space 2019 71:122

    Content type: Full paper

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  23. Density perturbations accompanying seismic waves are expected to generate prompt gravity perturbations preceding the arrival of P-waves. Vallée et al. (Science 358:1164–1168, 2017, https://doi.org/10.1126/scie...

    Authors: Masaya Kimura, Nobuki Kame, Shingo Watada, Makiko Ohtani, Akito Araya, Yuichi Imanishi, Masaki Ando and Takashi Kunugi

    Citation: Earth, Planets and Space 2019 71:120

    Content type: Comment

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    The original article was published in Earth, Planets and Space 2019 71:27

  24. The shallow accretionary prism of the Nankai Trough is a location where both large interplate earthquakes and slow earthquakes occur. Since the physical properties of sedimentary materials are important topics...

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

    Citation: Earth, Planets and Space 2019 71:116

    Content type: Full paper

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  25. We investigate S-wave attenuation (Qs) structure in and around Hokkaido, Japan, including the source area of the 2018 Hokkaido Eastern Iburi Earthquake (M 6.7) and its aftershocks. From the strong-motion seism...

    Authors: Ryoichi Nakamura and Takahiro Shiina

    Citation: Earth, Planets and Space 2019 71:114

    Content type: Express Letter

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  26. We applied tomographic inversion and receiver function analysis to seismic data from ocean-bottom seismometers and land-based stations to understand the structure and its relationship with slow slip events off...

    Authors: Aki Ito, Takashi Tonegawa, Naoki Uchida, Yojiro Yamamoto, Daisuke Suetsugu, Ryota Hino, Hiroko Sugioka, Koichiro Obana, Kazuo Nakahigashi and Masanao Shinohara

    Citation: Earth, Planets and Space 2019 71:111

    Content type: Full paper

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  27. A long linear distribution of epicenters is seen along the Japan Sea coast in the San-in district located in southwestern Japan. This linear distribution of epicenters is called the seismic belt in the San-in ...

    Authors: Hiroo Tsuda, Yoshihisa Iio and Takuo Shibutani

    Citation: Earth, Planets and Space 2019 71:109

    Content type: Express Letter

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  28. Gravity gradient tensor analysis has been a powerful tool for investigating subsurface structures and recently its application to a two-dimensional fault structure has been developed. To elucidate the faulting...

    Authors: Yoshihiro Hiramatsu, Akihiro Sawada, Wataru Kobayashi, Satoshi Ishida and Masaaki Hamada

    Citation: Earth, Planets and Space 2019 71:107

    Content type: Express Letter

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  29. The 2011 Tohoku-Oki offshore subduction earthquake (Mw 9.0) triggered many normal-type earthquakes inland in northeastern Japan. Among these were two very similar normal-faulting earthquakes in 2011 (Mw 5.8) and ...

    Authors: Keitaro Komura, Kotaro Aiyama, Takahiro Nagata, Hiroshi P. Sato, Akihiro Yamada and Yasuhira Aoyagi

    Citation: Earth, Planets and Space 2019 71:106

    Content type: Full paper

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  30. Oblique convergent margins often host forearc slivers separated by the subduction interface and a trench parallel strike-slip fault system in the overriding plate. Mexican oblique subduction setting led to the...

    Authors: Ekaterina Kazachkina, Vladimir Kostoglodov, Allen Husker and Nathalie Cotte

    Citation: Earth, Planets and Space 2019 71:104

    Content type: Full paper

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  31. The Hokkaido Eastern Iburi Earthquake (M = 6.7) occurred on Sep. 6, 2018 in the southern part of Central Hokkaido, Japan. Since Paleogene, this region has experienced the dextral oblique transpression between the...

    Authors: Takaya Iwasaki, Noriko Tsumura, Tanio Ito, Kazunori Arita, Matsubara Makoto, Hiroshi Sato, Eiji Kurashimo, Naoshi Hirata, Susumu Abe, Katsuya Noda, Akira Fujiwara, Shinsuke Kikuchi and Kazuko Suzuki

    Citation: Earth, Planets and Space 2019 71:103

    Content type: Frontier letter

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    The Correction to this article has been published in Earth, Planets and Space 2020 72:39

  32. The source rupture process of the 2018 Hokkaido Eastern Iburi earthquake (MJMA 6.7) was analyzed by a kinematic waveform inversion method using strong-motion data in 0.04–0.5 Hz. This earthquake occurred close to...

    Authors: Kimiyuki Asano and Tomotaka Iwata

    Citation: Earth, Planets and Space 2019 71:101

    Content type: Full paper

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  33. In this study, we investigate the source rupture process of the 2018 Hokkaido Eastern Iburi earthquake in Japan (MJMA 6.7) and how the ground motion can be reproduced using available source and velocity models. F...

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

    Citation: Earth, Planets and Space 2019 71:98

    Content type: Express Letter

    Published on:

    The Retraction Note to this article has been published in Earth, Planets and Space 2019 71:142

  34. The Ontong Java Plateau (OJP) in the southwest Pacific is the largest oceanic large igneous provinces (LIP) on Earth. Detailed seismic structure of the plateau has not been understood well because of sparse se...

    Authors: Daisuke Suetsugu, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Takehi Isse, Yasushi Ishihara, Satoru Tanaka, Masayuki Obayashi, Takashi Tonegawa, Junko Yoshimitsu and Takumi Kobayashi

    Citation: Earth, Planets and Space 2019 71:97

    Content type: Express Letter

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  35. In this study, we investigated the influence of local structural heterogeneities on aftershocks of the 2008 Iwate–Miyagi Nairiku earthquake (M 7.2) that occurred in the northeastern Japan arc. Although this ar...

    Authors: Sumire Maeda, Toru Matsuzawa, Keisuke Yoshida, Tomomi Okada and Takeyoshi Yoshida

    Citation: Earth, Planets and Space 2019 71:94

    Content type: Full paper

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  36. The 2016 Kumamoto earthquake (Mw 7.0) caused hot springs in the Uchinomaki area of Aso caldera to become dormant. Geodetic and borehole observations have previously demonstrated that the area around the hot sp...

    Authors: Kosuke Takahashi, Takeshi Tsuji, Tatsunori Ikeda, Hiro Nimiya, Yuichiro Nagata and Yudai Suemoto

    Citation: Earth, Planets and Space 2019 71:87

    Content type: Express Letter

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  37. We present the spatiotemporal evolution of the Boso slow slip event with a moment of 20 × 1018 N m that occurred in June 2018; such events, which have a duration of 1–2 weeks, have repeatedly occurred off the Bos...

    Authors: Shinzaburo Ozawa, Hiroshi Yarai and Tomokazu Kobayashi

    Citation: Earth, Planets and Space 2019 71:78

    Content type: Express Letter

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  38. Autocorrelation analysis using ambient noise is a useful method to detect temporal changes in wave velocity and scattering property. In this study, we investigated the temporal changes in seismic wave velocity...

    Authors: Hiroki Ikeda and Ryota Takagi

    Citation: Earth, Planets and Space 2019 71:72

    Content type: Full paper

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  39. The eastern North American rifted margin is a passive tectonic margin that has experienced Paleozoic ocean closure and Mesozoic continent rifting. To understand evolution of this continental margin, we modeled...

    Authors: Wenbin Guo, Shuai Zhao, Fuyun Wang, Zhuoxin Yang, Shixu Jia and Zhi Liu

    Citation: Earth, Planets and Space 2019 71:69

    Content type: Full paper

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  40. We investigated the cause of destructive ground motion during the 2018 Hokkaido eastern Iburi earthquake. We conducted strong motion observations of aftershocks and microtremors and the surface wave method in ...

    Authors: Nobuo Takai, Michiko Shigefuji, Jun Horita, Shingo Nomoto, Takahiro Maeda, Masayoshi Ichiyanagi, Hiroaki Takahashi, Hiroaki Yamanaka, Kosuke Chimoto, Seiji Tsuno, Masahiro Korenaga and Nobuyuki Yamada

    Citation: Earth, Planets and Space 2019 71:67

    Content type: Full paper

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  41. The 2018 Hokkaido Iburi-Tobu earthquake occurred on September 6. In this earthquake, seismic intensity 7 was measured at Shikanuma, Atsuma Town, and severe damage occurred in Hokkaido. The strong motions were ...

    Authors: Kenichi Nakano and Hiroshi Kawase

    Citation: Earth, Planets and Space 2019 71:66

    Content type: Express Letter

    Published on:

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