Naoshi Hirata
Chiba University
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Publication
Featured researches published by Naoshi Hirata.
Geophysical Research Letters | 1992
Naoshi Hirata; Boris Ya. Karp; Takashi Yamaguchi; Toshihiko Kanazawa; Kiyoshi Suyehiro; Junzo Kasahara; Hajime Shiobara; Masanao Shinohara; Hajimu Kinoshita
In September of 1990, a seismic refraction and reflection survey was conducted in the Japan Basin, in the northeastern part of the Japan Sea, as a part of the Japan-USSR joint expedition. Twenty-six ocean bottom seismometers (OBSs) were deployed on two 200-km long lines. Explosives and an airgun were fired as controlled seismic sources on the two mutually perpendicular lines. Airguns were also used as the source for the multi-channel reflection profiles. The crustal structure deduced is that of a typical oceanic basin: the crustal thickness is about 8.5 km including 2 km of sediment. We obtained a more detailed crustal structure than that obtained previously. From the dense airgun shooting data, the crustal structure is well resolved to show layer 1A, layer 1B, layer 2A, 2B, 2C, layer 3, and the mantle. The crust basically consists of laterally homogeneous layers but the Moho deepens slightly westward.
Geophysical Journal International | 1990
Takaya Iwasaki; Naoshi Hirata; Toshihiko Kanazawa; J. Melles; Kiyoshi Suyehiro; Taku Urabe; L. Möller; Jannis Makris; Hideki Shimamura
Bulletin of the Earthquake Research Institute, University of Tokyo | 1991
Naoshi Hirata; Hajimu Kinoshita; Hiroshi Katao; Hisatoshi Baba; Yuka Kaiho; Sadayuki Koresawa; Yuichiro Ono; Kohichi Hayashi
Marine Geophysical Researches | 1994
Masanao Shinohara; Naoshi Hirata; Narumi Takahashi
Geophysical Journal International | 1991
Takaya Iwasaki; Naoshi Hirata; Toshihiko Kanazawa; Taku Urabe; Yoshinobu Motoya; Hideki Shimamura
Journal of physics of the earth | 1990
Tae Woong Chung; Naoshi Hirata; Ryosuke Sato
Archive | 1992
Kiyoshi Suyehiro; Toshihiko Kanazawa; Naoshi Hirata; Masanao Shinohara; Hajimu Kinoshita
Archive | 1992
Toshihiko Kanazawa; Kiyoshi Suyehiro; Naoshi Hirata; Masanao Shinohara
Bulletin of the Earthquake Research Institute, University of Tokyo | 1987
Naoshi Hirata; Hajimu Kinoshita; Kiyoshi Suyehiro; Makoto Suyemasu; Naoko Matsuda; Toru Ouchi; Hiroshi Katao; Koresawa< Sadayuki; Shozaburo Nagumo
Journal of physics of the earth | 1995
Kiyoshi Suyehiro; Toshihiko Kanazawa; Naoshi Hirata; Masanao Shinohara
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