Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan

Naoko Kato; Tomoo Echigo; Hiroshi Sato; Masaaki Tateishi; Sumiko Ogino; Shin'ichi Sakai; Shigeru Toda; Shin Koshiya; Tanio Ito; Tsuyoshi Toyoshima; Toshifumi Imaizumi; Hajime Kato; Shintaro Abe

doi:10.1186/BF03351832

Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan

Naoko Kato, Tomoo Echigo, Hiroshi Sato, Masaaki Tateishi, Sumiko Ogino, Shin'ichi Sakai, Shigeru Toda, Shin Koshiya, Tanio Ito, Tsuyoshi Toyoshima, Toshifumi Imaizumi, Hajime Kato, Shintaro Abe

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The Mid-Niigata Prefecture earthquake in 2004 (M_JMA 6.8) generated surface ruptures along the eastern rim of the Uonuma Hills. To elucidate the structural linkage between the surface ruptures and the source fault at depth, the high-resolution seismic reflection profile across the surface ruptures and nearby active faults, and the data of aftershock distribution are examined. The 5.2-km-long, high-resolution, depth-converted seismic section reveals an emergent thrust beneath the surface ruptures. A two-dimensional model of the fault geometry has been constructed based on the aftershock distribution and the shallow reflection profile. The development of the main geologic structure are well explained by forward modeling using a balanced cross-section method. In detail, the fault system generated the main shock dips at a steep angle (60°) below 5 km depth and more shallowly (30°) near the surface.

Original language	English
Pages (from-to)	447-452
Number of pages	6
Journal	earth, planets and space
Volume	57
Issue number	5
DOIs	https://doi.org/10.1186/BF03351832
Publication status	Published - 2005
Externally published	Yes

Keywords

2004 Mid-Niigata Prefecture earthquake
Active fault-and-fold
Balanced-cross section
Central Japan
Fault model
Seismic reflection profile
Subsurface structure
Surface rupture

ASJC Scopus subject areas

Geology
Space and Planetary Science

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10.1186/BF03351832

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Kato, N., Echigo, T., Sato, H., Tateishi, M., Ogino, S., Sakai, S., Toda, S., Koshiya, S., Ito, T., Toyoshima, T., Imaizumi, T., Kato, H., & Abe, S. (2005). Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan. earth, planets and space, 57(5), 447-452. https://doi.org/10.1186/BF03351832

Kato, N, Echigo, T, Sato, H, Tateishi, M, Ogino, S, Sakai, S, Toda, S, Koshiya, S, Ito, T, Toyoshima, T, Imaizumi, T, Kato, H & Abe, S 2005, 'Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan', earth, planets and space, vol. 57, no. 5, pp. 447-452. https://doi.org/10.1186/BF03351832

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title = "Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan",

abstract = "The Mid-Niigata Prefecture earthquake in 2004 (MJMA 6.8) generated surface ruptures along the eastern rim of the Uonuma Hills. To elucidate the structural linkage between the surface ruptures and the source fault at depth, the high-resolution seismic reflection profile across the surface ruptures and nearby active faults, and the data of aftershock distribution are examined. The 5.2-km-long, high-resolution, depth-converted seismic section reveals an emergent thrust beneath the surface ruptures. A two-dimensional model of the fault geometry has been constructed based on the aftershock distribution and the shallow reflection profile. The development of the main geologic structure are well explained by forward modeling using a balanced cross-section method. In detail, the fault system generated the main shock dips at a steep angle (60°) below 5 km depth and more shallowly (30°) near the surface.",

keywords = "2004 Mid-Niigata Prefecture earthquake, Active fault-and-fold, Balanced-cross section, Central Japan, Fault model, Seismic reflection profile, Subsurface structure, Surface rupture",

author = "Naoko Kato and Tomoo Echigo and Hiroshi Sato and Masaaki Tateishi and Sumiko Ogino and Shin'ichi Sakai and Shigeru Toda and Shin Koshiya and Tanio Ito and Tsuyoshi Toyoshima and Toshifumi Imaizumi and Hajime Kato and Shintaro Abe",

note = "Funding Information: manuscript. We are grateful to the seismic crew of the Hi-rokami 2004 project and the Research Group for Urgent Aftershock Observation of the Earthquake Research Institute, University of Tokyo, for providing seismic data, and to Takaya Iwasaki and Naoshi Hirata for discussions. The seismic experiments were funded by Special Coordination Funds for Promoting Science and Technology provided by the Ministry of Education, Science, Culture and Sports.",

year = "2005",

doi = "10.1186/BF03351832",

language = "English",

volume = "57",

pages = "447--452",

journal = "Earth, Planets and Space",

issn = "1343-8832",

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number = "5",

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T1 - Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan

AU - Kato, Naoko

AU - Echigo, Tomoo

AU - Sato, Hiroshi

AU - Tateishi, Masaaki

AU - Ogino, Sumiko

AU - Sakai, Shin'ichi

AU - Toda, Shigeru

AU - Koshiya, Shin

AU - Ito, Tanio

AU - Toyoshima, Tsuyoshi

AU - Imaizumi, Toshifumi

AU - Kato, Hajime

AU - Abe, Shintaro

N1 - Funding Information: manuscript. We are grateful to the seismic crew of the Hi-rokami 2004 project and the Research Group for Urgent Aftershock Observation of the Earthquake Research Institute, University of Tokyo, for providing seismic data, and to Takaya Iwasaki and Naoshi Hirata for discussions. The seismic experiments were funded by Special Coordination Funds for Promoting Science and Technology provided by the Ministry of Education, Science, Culture and Sports.

PY - 2005

Y1 - 2005

N2 - The Mid-Niigata Prefecture earthquake in 2004 (MJMA 6.8) generated surface ruptures along the eastern rim of the Uonuma Hills. To elucidate the structural linkage between the surface ruptures and the source fault at depth, the high-resolution seismic reflection profile across the surface ruptures and nearby active faults, and the data of aftershock distribution are examined. The 5.2-km-long, high-resolution, depth-converted seismic section reveals an emergent thrust beneath the surface ruptures. A two-dimensional model of the fault geometry has been constructed based on the aftershock distribution and the shallow reflection profile. The development of the main geologic structure are well explained by forward modeling using a balanced cross-section method. In detail, the fault system generated the main shock dips at a steep angle (60°) below 5 km depth and more shallowly (30°) near the surface.

AB - The Mid-Niigata Prefecture earthquake in 2004 (MJMA 6.8) generated surface ruptures along the eastern rim of the Uonuma Hills. To elucidate the structural linkage between the surface ruptures and the source fault at depth, the high-resolution seismic reflection profile across the surface ruptures and nearby active faults, and the data of aftershock distribution are examined. The 5.2-km-long, high-resolution, depth-converted seismic section reveals an emergent thrust beneath the surface ruptures. A two-dimensional model of the fault geometry has been constructed based on the aftershock distribution and the shallow reflection profile. The development of the main geologic structure are well explained by forward modeling using a balanced cross-section method. In detail, the fault system generated the main shock dips at a steep angle (60°) below 5 km depth and more shallowly (30°) near the surface.

KW - 2004 Mid-Niigata Prefecture earthquake

KW - Active fault-and-fold

KW - Balanced-cross section

KW - Central Japan

KW - Fault model

KW - Seismic reflection profile

KW - Subsurface structure

KW - Surface rupture

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IS - 5

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Geologic fault model based on the high-resolution seismic reflection profile and aftershock distribution associated with the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan

Abstract

Keywords

ASJC Scopus subject areas

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