Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Kei KATSUMATA"'
Autor:
Kei Katsumata
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-10 (2024)
Abstract In the southwestern area of the Kurile Islands subduction zone, three large earthquakes including the M w8.2 1969 and the M w8.3 1994 Hokkaido Toho-oki earthquakes and the M w7.8 1975 tsunami earthquake occurred in almost the same location.
Externí odkaz:
https://doaj.org/article/df0a2a7140e34f26b2d5f2c2e2b83fb5
Autor:
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, Takashi Nakayama, Group for the aftershock observations of the 2011 off the Pacific coast of Tohoku Earthquake
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-29 (2024)
Abstract 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 activities remain unclear. To i
Externí odkaz:
https://doaj.org/article/f78db71ea92b454399bae40c8a2f4f35
Autor:
Kei Katsumata
Publikováno v:
Geoscience Letters, Vol 10, Iss 1, Pp 1-10 (2023)
Abstract In subduction zones, slow slip events (SSEs) have been observed in the portion deeper than the downdip edge of seismogenic zone. However, since it is far offshore from geodetic networks on land, shallow SSEs near the trench axis are hardly o
Externí odkaz:
https://doaj.org/article/dcbdc57c30814399b3801c25fa46894d
Autor:
Kei Katsumata, Masao Nakatani
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-19 (2021)
Abstract We make trial binary forecasts for the Kurile–Japan subduction zone for the period 1988–2014 by hypothesizing that seismic quiescence (i.e., the absence of earthquakes of M ≥ 5 for a minimum period of T q) is a precursor of a large (7.
Externí odkaz:
https://doaj.org/article/7f2809e056474e368b744ec278a653df
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-13 (2021)
Abstract 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 northeastern (NE) Japan subduction zone
Externí odkaz:
https://doaj.org/article/dbd19b43cc6b4bbeb0a230a23fa66472
Autor:
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, Yoshiko Yamanaka, Shinichiro Horikawa, Masahiro Kosuga, Hiroshi Katao, Yoshihisa Iio, Airi Nagaoka, Noriko Tsumura, Tomotake Ueno, The Group for the Aftershock Observations of the 2018 Hokkaido Eastern Iburi Earthquake
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-13 (2021)
Abstract The tectonic stress field was investigated in and around the aftershock area of the Hokkaido Eastern Iburi earthquake (M JMA = 6.7) occurred on 6 September 2018. We deployed 26 temporary seismic stations in the aftershock area for approximat
Externí odkaz:
https://doaj.org/article/d1454d09f83c415485e9fdd50455b270
Autor:
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, Shuichiro Hirano, Toshiko Terakawa, Shinichiro Horikawa, Masahiro Kosuga, Hiroshi Katao, Yoshihisa Iio, Airi Nagaoka, Noriko Tsumura, Tomotake Ueno, the Group for the Aftershock Observations of the 2018 Hokkaido Eastern Iburi Earthquake
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-8 (2019)
Abstract The Hokkaido Eastern Iburi earthquake (M JMA = 6.7) occurred on September 6, 2018, in the Hokkaido corner region where the Kurile and northeastern Japan island arcs meet. We relocated aftershocks of this intraplate earthquake immediately aft
Externí odkaz:
https://doaj.org/article/253aa88fa1794933bdb195cb1f2102d3
Autor:
Masao Nakatani, Kei Katsumata
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-19 (2021)
We make trial binary forecasts for the Kurile–Japan subduction zone for the period 1988–2014 by hypothesizing that seismic quiescence (i.e., the absence of earthquakes of M ≥ 5 for a minimum period of Tq) is a precursor of a large (7.5 ≤ Mw T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae76e211c04288b875529b45f96771ee
https://doi.org/10.1186/s40623-021-01418-z
https://doi.org/10.1186/s40623-021-01418-z
Autor:
Kei Katsumata
Publikováno v:
Pure and Applied Geophysics. 174:2427-2442
An earthquake catalog created by the International Seismological Center (ISC) was analyzed, including 3898 earthquakes located in and around Japan between January 1964 and June 2012 shallower than 60 km with the body wave magnitude of 5.0 or larger.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5bc99787ae671b20445147a8d2a85f6
https://doi.org/10.1007/s00024-016-1415-8
https://doi.org/10.1007/s00024-016-1415-8
Autor:
Hiroshi Katao, Masahiro Kosuga, Kei Katsumata, Takeshi Sagiya, Yoshihisa Iio, Youichiro Takada
Publikováno v:
Tectonophysics. 682:134-146
We estimated 275 focal mechanisms from P-wave first-motion polarities of small earthquakes obtained in an extensive seismic survey during 2004–2008 in and around the Atotsugawa fault, central Japan, where ongoing dextral shear strain concentration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02d150a6d7043162433d4993b85330cc
https://doi.org/10.1016/j.tecto.2016.05.013
https://doi.org/10.1016/j.tecto.2016.05.013