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4. Seismology

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  1. Rapid and accurate earthquake magnitude estimations are essential for earthquake early warning (EEW) systems. The distance information between the seismometers and the earthquake hypocenter can be important to...

    Authors: Baorui Hou, Yueyong Zhou, Shanyou Li, Yongxiang Wei and Jindong Song
    Citation: Earth, Planets and Space 2024 76:58
  2. Temporary slip speed increases with durations of 1–3 h were identified during short-term slow slip events in records of borehole and laser strainmeters in the Tokai region, Japan. They were found by searching ...

    Authors: Akio Katsumata, Kazuki Miyaoka, Takahiro Tsuyuki, Satoshi Itaba, Masayuki Tanaka, Takeo Ito, Akiteru Takamori and Akito Araya
    Citation: Earth, Planets and Space 2024 76:45
  3. This technical report explains details on the results of the investigation to build a subsurface structural model and a selection of earthquake data at the target site of the blind prediction exercise for “The...

    Authors: Shinichi Matsushima, Hiroaki Yamanaka, Seiji Tsuno, Kosuke Chimoto, Haruhiko Suzuki, Hiroshi Kawase and Takeshi Matsushima
    Citation: Earth, Planets and Space 2024 76:43
  4. Inversion tectonics, in which old normal faults act as reverse faults in current stress fields, are frequently observed in northeastern Japan (Tohoku District); however, the conditions that control these fault...

    Authors: Ayaka Tagami, Miu Matsuno, Tomomi Okada, Shin’ichi Sakai, Mako Ohzono, Kei Katsumata, Masahiro Kosuga, Yoshiko Yamanaka, Hiroshi Katao, Takeshi Matsushima, Hiroshi Yakiwara, Satoshi Hirahara, Toshio Kono, Shu’ichiro Hori, Toru Matsuzawa, Shuutoku Kimura…
    Citation: Earth, Planets and Space 2024 76:39
  5. Given the recent developments in machine-learning technology, its application has rapidly progressed in various fields of earthquake seismology, achieving great success. Here, we review the recent advances, fo...

    Authors: Hisahiko Kubo, Makoto Naoi and Masayuki Kano
    Citation: Earth, Planets and Space 2024 76:36
  6. The on-site P-wave earthquake early warning (EEW) based on the site-specific ratios of S-waves to P-waves has been applied to large-sized offshore earthquakes, and the efficiency of the method has been validat...

    Authors: Seiji Tsuno, Katsutomo Niwa, Masahiro Korenaga, Hiroaki Yamanaka, Kosuke Chimoto, Hiroe Miyake and Nobuyuki Yamada
    Citation: Earth, Planets and Space 2024 76:32
  7. As megathrust earthquakes often have source areas in offshore regions, offshore seismic observations are important. However, the detection capability and resolution of offshore earthquake locations are low owi...

    Authors: Satoru Baba, Eiichiro Araki, Takashi Yokobiki, Kei Kawamata, Keisuke Uchiyama and Takuji Yoshizuka
    Citation: Earth, Planets and Space 2024 76:28
  8. When evaluating strong ground motions and tsunamis from specified source faults, it is required that the input parameters, such as fault geometry, rake angle, and slip amount, do not deviate from those of a re...

    Authors: Takeo Ishibe, Toshiko Terakawa, Akinori Hashima, Masashi Mochizuki and Ritsuko S. Matsu’ura
    Citation: Earth, Planets and Space 2024 76:26
  9. Seismic activity in the Noto region of Ishikawa Prefecture, central Japan, has increased since August 2020 and has continued as of August 2023. Stress changes due to subsurface sources and increases in fluid p...

    Authors: Tomomi Okada, Martha K. Savage, Shin’ichi Sakai, Keisuke Yoshida, Naoki Uchida, Ryota Takagi, Shuutoku Kimura, Satoshi Hirahara, Ayaka Tagami, Ryotaro Fujimura, Toru Matsuzawa, Eiji Kurashimo and Yoshihiro Hiramatsu
    Citation: Earth, Planets and Space 2024 76:24
  10. The 2008 Wenchuan Mw 7.9 mainshock caused catastrophic destruction to cities along the northwestern margin of the Sichuan Basin. This earthquake did not activate the Wenchuan–Maoxian Fault (WMF) on the hinterl...

    Authors: Rongjiang Tang and Ryosuke Ando
    Citation: Earth, Planets and Space 2024 76:2
  11. We present a novel three-dimensional model of compressional wave attenuation (1/QP) for the Eastern and eastern Southern Alps in Europe that includes the eastern part of the Adriatic indenter, termed here the Dol...

    Authors: Azam Jozi Najafabadi, Christian Haberland, Mark R. Handy, Eline Le Breton and Michael Weber
    Citation: Earth, Planets and Space 2023 75:187
  12. Crustal earthquakes are generally recognized as having recurrence periods of more than 1000 years. However, in northern Ibaraki Prefecture, Japan, two moderate-sized earthquakes occurred on almost the same fau...

    Authors: Kazuhito Hikima
    Citation: Earth, Planets and Space 2023 75:169
  13. Near-surface seismic shear wave is a basic tool for seismic investigations. However, its frequency-dependent property is not fully investigated, especially by the in situ observation method. Here, we develop t...

    Authors: Hao Zhang, Yang Shi, Hongjun He, Hanwen Ji and Yu Miao
    Citation: Earth, Planets and Space 2023 75:167
  14. Since the Mw 7.9 Gorkha earthquake of April 25, 2015, the seismicity of central and western Nepalese Himalaya has been monitored by an increasing number of permanent seismic stations. These instruments contribute...

    Authors: Bharat Prasad Koirala, Marine Laporte, Laurent Bollinger, Daria Batteux, Jean Letort, Aurélie Guilhem Trilla, Nicolas Wendling-Vazquez, Mukunda Bhattarai, Shiba Subedi and Lok Bijaya Adhikari
    Citation: Earth, Planets and Space 2023 75:165
  15. Slow earthquakes occur at deep and shallow plate boundaries along the Nankai Trough. Deep slow earthquakes are continuously distributed along the 30–40 km depth contours of the upper surface of the subducted P...

    Authors: Shunsuke Takemura, Yohei Hamada, Hanaya Okuda, Yutaro Okada, Kurama Okubo, Takeshi Akuhara, Akemi Noda and Takashi Tonegawa
    Citation: Earth, Planets and Space 2023 75:164
  16. We present the 1D subsoil structure and local site effects at KUMA strong ground motion station in Kumamoto City, Japan. We analyze data from a field campaign conducted in the framework of the Blind Prediction...

    Authors: Maria Manakou, Zafeiria Roumelioti and Evi Riga
    Citation: Earth, Planets and Space 2023 75:163
  17. On 22 December 2018, the major flank collapse of Anak Krakatau volcano generated a tsunami that struck the surrounding coasts of Java and Sumatra islands in Indonesia without warning. It was later suggested th...

    Authors: Theodorus Permana, Tatok Yatimantoro and Asteria Satyaning Handayani
    Citation: Earth, Planets and Space 2023 75:162
  18. After the 2011 Mw 9.0 Tohoku earthquake, seismicity became extremely active throughout Japan. Despite enormous efforts to detect the large number of earthquakes, microearthquakes (M < 2 inland, M < 3 offshore) we...

    Authors: Koji Tamaribuchi, Shota Kudo, Kengo Shimojo and Fuyuki Hirose
    Citation: Earth, Planets and Space 2023 75:155

    The Correction to this article has been published in Earth, Planets and Space 2024 76:11

  19. We present a novel method for coastal tsunami prediction utilizing a denoising autoencoder (DAE) model, one of the deep learning algorithms. Our study focuses on the Tohoku coast, Japan, where dense offshore b...

    Authors: Yuchen Wang, Kentaro Imai, Takuya Miyashita, Keisuke Ariyoshi, Narumi Takahashi and Kenji Satake
    Citation: Earth, Planets and Space 2023 75:154
  20. Estimates of heat flow can contribute to our understanding of geological structures in plate convergent zones that produce great earthquakes. We applied automated velocity analysis to obtain the accurate seism...

    Authors: Shuto Takenouchi, Takeshi Tsuji, Kazuya Shiraishi, Yasuyuki Nakamura, Shuichi Kodaira, Gou Fujie and Kota Mukumoto
    Citation: Earth, Planets and Space 2023 75:147
  21. A numerical investigation of surface wave propagation in the surface wave exploration of river embankments is implemented using 3D shallow soil models with different subsurface shapes and S-wave velocities. Th...

    Authors: Shuntaro Miyanaga and Hiroaki Yamanaka
    Citation: Earth, Planets and Space 2023 75:135
  22. In this study, we compared observations and predictions submitted by participants for blind prediction experiments for ground motions using aftershocks, foreshock, and mainshock of the 2016 Kumamoto earthquake...

    Authors: Seiji Tsuno, Fumiaki Nagashima, Hiroshi Kawase, Hiroaki Yamanaka and Shinichi Matsushima
    Citation: Earth, Planets and Space 2023 75:130
  23. High-resolution seismic image is critically important for mining minerals. In this study, we collected seismic data from a local dense seismic array consisting of 154 stations around the Anyuan mining area and...

    Authors: Meng Gong, Jian Lv, Xingmian Zhang, Yong Zheng, Hao Chen, Jun Dong, Xiaohui Zha, Zheng Li, Shuzhong Sheng and Tongli Wang
    Citation: Earth, Planets and Space 2023 75:129
  24. The source imaging for offshore earthquakes using terrestrial geodetic data has a limited estimation performance due to the low data resolution. One approach to overcome this limitation is the use of seafloor ...

    Authors: Hisahiko Kubo, Tatsuya Kubota, Wataru Suzuki and Takeshi Nakamura
    Citation: Earth, Planets and Space 2023 75:125
  25. On September 26, 2019, an Mw 6.5 earthquake occurred 23 km northeast of Ambon City, Indonesia, followed by numerous aftershock series related to a complex fault network reactivation in the Ambon and Seram regi...

    Authors: Aria W. Baskara, David P. Sahara, Andri D. Nugraha, Andi Azhar Rusdin, Z. Zulfakriza, Sri Widiyantoro, Wahyu Triyoso, Awali Priyono, Nanang T. Puspito, Hasbi Ash Shiddiqi, Dian Kusumawati, Alfend Rudyawan and Erfin Elly
    Citation: Earth, Planets and Space 2023 75:124
  26. When the 2003 Tokachi-oki earthquake generated a large tsunami off eastern Hokkaido, Japan, it was detected by cabled ocean-bottom pressure gauges (OBPs) installed within the seismic source region. The OBP rec...

    Authors: SatByul Kim, Tatsuhiko Saito, Tatsuya Kubota and Sung-Joon Chang
    Citation: Earth, Planets and Space 2023 75:113
  27. We present horizontal ground motion predictions at a soft site in the Kumamoto alluvial plain for the Mj 5.9 and Mj 6.5 Kumamoto earthquakes of April 2016, in the framework of an international blind prediction...

    Authors: Salomon Hailemikael, Giuseppe Di Giulio, Giuliano Milana, Maurizio Vassallo and Paola Bordoni
    Citation: Earth, Planets and Space 2023 75:105
  28. For the accurate prediction of earthquake ground motions, the investigation of three elements in its process, namely the source, path, and site effects, is crucial, and their accuracy and reliability should be...

    Authors: Fumiaki Nagashima, Hiroshi Kawase, Kenichi Nakano and Eri Ito
    Citation: Earth, Planets and Space 2023 75:104
  29. To investigate the dominant deformational patterns and stress conditions in the upper crustal structure of the Kinki region, southern-central Japan, we constructed a high-resolution 3D azimuthal anisotropy mod...

    Authors: Bokani Nthaba, Tatsunori Ikeda, Takeshi Tsuji and Yoshihisa Iio
    Citation: Earth, Planets and Space 2023 75:102
  30. After the occurrence of a large earthquake, engineering seismologists are often requested to estimate strong ground motions at a site where strong motion data were not obtained. The goal of this study was to t...

    Authors: Atsushi Nozu
    Citation: Earth, Planets and Space 2023 75:101
  31. Mw 7.6 and Mw 7.4 earthquakes occurred 16 h apart on April 12 and April 13, 2014, at depths of 15 km and 35 km, respectively, southwest of Makira Island (San Cristobal) in the Solomon Islands. We study the sou...

    Authors: Calvin Luiramo Qwana, Masatoshi Miyazawa and James Mori
    Citation: Earth, Planets and Space 2023 75:99

    The Correction to this article has been published in Earth, Planets and Space 2023 75:106

  32. Precisely evaluating the source, path, and site terms in a broadband frequency range is indispensable for quantitatively predicting strong motions. We conducted a generalized spectral inversion of strong motio...

    Authors: Eri Ito, Kenichi Nakano, Haruko Sekiguchi, Fumiaki Nagashima and Hiroshi Kawase
    Citation: Earth, Planets and Space 2023 75:97
  33. Following the 1923 Kanto earthquake in Japan, Japanese researchers noticed the strong effects of surface geology on seismic motion (ESG) and began to investigate these effects to quantify the site amplificatio...

    Authors: Hiroshi Kawase, Kenichi Nakano, Fumiaki Nagashima, Eri Ito, Jikai Sun and Ziqian Wang
    Citation: Earth, Planets and Space 2023 75:95
  34. We present velocity structure inversion for three stations of Iranian Strong Motion Network (ISMN), and one KiK-net station that is used as a benchmark, for the application of diffuse wave-field concept in tec...

    Authors: Iman Ashayeri, Eri Ito and Hiroshi Kawase
    Citation: Earth, Planets and Space 2023 75:94
  35. The geometry of the Philippine Sea slab (PHS) subducting beneath the Japanese islands has been imaged to 400 km depth beneath the Kyushu and Chugoku regions, whereas the PHS slab geometry beneath the Hokuriku ...

    Authors: Kazuki Miyazaki, Junichi Nakajima, Nobuaki Suenaga and Shoichi Yoshioka
    Citation: Earth, Planets and Space 2023 75:93
  36. To estimate the phase velocity using the array observations of microtremors, some algorithms for the estimation include constraints on the array shape, such as equilateral triangles or the placement of receive...

    Authors: Harusato Kimura, Hitoshi Morikawa, Haruka Tomobe and Kahori Iiyama
    Citation: Earth, Planets and Space 2023 75:88
  37. The mainshock of the 2016 Kumamoto Earthquake (Mw 7.0) caused extensive damage to buildings in downtown Mashiki, Kumamoto Prefecture, Japan. The heavy building damage in the area was associated with both stron...

    Authors: Kiyoshi Fukutake, Kazuhiro Yoshida, Hiroshi Kawase, Fumiaki Nagashima and Jikai Sun
    Citation: Earth, Planets and Space 2023 75:87
  38. In volcanic regions, active earthquake swarms often occur in association with volcanic activity, and their rapid detection and analysis are crucial for volcano disaster prevention. Currently, these processes a...

    Authors: Ahyi Kim, Yuji Nakamura, Yohei Yukutake, Hiroki Uematsu and Yuki Abe
    Citation: Earth, Planets and Space 2023 75:85
  39. The 2021 Mw 7.1 and 2022 Mw 7.4 Fukushima-oki earthquakes ruptured adjacent regions in the subducting slab, which gave us a good opportunity to better understand the rupture process of an intraslab earthquake and...

    Authors: Hiroaki Kobayashi, Tetsushi Watanabe and Kazuki Koketsu
    Citation: Earth, Planets and Space 2023 75:81
  40. 1D velocity profiles at a strong motion station in the northern part of the Kumamoto plain, Japan, were submitted in Step-1 of the blind prediction exercise of strong ground motions in the sixth international ...

    Authors: Kosuke Chimoto, Hiroaki Yamanaka, Seiji Tsuno and Shinichi Matsushima
    Citation: Earth, Planets and Space 2023 75:79
  41. The study of ground resonances is important to assess seismic site amplification and to infer information on the geometrical and mechanical properties of the resonating structures. 1D- and 2D-type resonances i...

    Authors: Giulia Sgattoni, Giovanni Lattanzi and Silvia Castellaro
    Citation: Earth, Planets and Space 2023 75:74
  42. Time-averaged shear-wave velocity to 30 m (VS30) is commonly used in ground motion models as a parameter for evaluating site effects. This study used a collection of boreholes in Beijing, Tianjin, Guangxi, Guangd...

    Authors: Yuting Zhang, Yefei Ren, Ruizhi Wen, Hongwei Wang and Kun Ji
    Citation: Earth, Planets and Space 2023 75:72

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