Paleoseismic History of the Northern Ayasegawa Fault since the Late Pleistocene Reconstructed from Shallow Sub-surface Deformation Structure

Sugai, Toshihiko; Mizuno, Kiyohide; Hachinohe, Shoichi; Nakazato, Hiroomi; Ishiyama, Tatsuya; Sugiyama, Yuichi; Hosoya, Takushi; Matsushima, Hiroko; Yoshida, Hidetsugu; Yamaguchi, Masatoshi; Ogami, Takashi

doi:10.5026/jgeography.116.3-4_394

Cited by 9 publications

(5 citation statements)

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“…Sugiyama et al, 2009). Faulting events since the latest Pleistocene have occurred at around 20 ka and between 6.5 and 2.5 ka (Sugihara, 1989;Mizuno et al, 2002Mizuno et al, , 2004Sugai et al, 2007).…”

Section: Regional Settingmentioning

confidence: 97%

“…The light-brown mud is massive and includes volcanic glass shards. The chemical composition of the glass shards is similar to that of As-YP tephra Table 2 Chemical composition of volcanic glass shards obtained from aeolian sediments in core YS-01 and core K-4 (about 7 km northeast of YS-01) from Sugai et al (2007). div.…”

Section: Basal Topographymentioning

confidence: 98%

“…Further, because both the glass shards in core YS-01 and the As-YP tephra in core K-4 (Sugai et al, 2007) lie at the top of the aeolian sequence, we assigned the shards to As-YP. In contrast, As-BP tephra was not found in the aeolian sediments.…”

Section: Corementioning

confidence: 99%

“…Glass shards of As-BP and As-YP were obtained from core K-4, about 7 km northeast of the core YS-01 location ( Fig. 1; Sugai et al, 2007).…”

Section: Core Analysismentioning

confidence: 99%

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Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

2012

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Section: Regional Settingmentioning

confidence: 97%

Section: Basal Topographymentioning

confidence: 98%

Section: Corementioning

confidence: 99%

“…Glass shards of As-BP and As-YP were obtained from core K-4, about 7 km northeast of the core YS-01 location ( Fig. 1; Sugai et al, 2007).…”

Section: Core Analysismentioning

confidence: 99%

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Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

2012

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“…Correlation of MIS 5e shallow marine sediments is based on recognition of volcanic tephra Hk‐TP (ca. 60–65 ka) [ Machida and Arai , ; identified by Sugai et al ., ] and On‐Pm1 (ca. 85 ka) [ Machida and Arai , ] within overlying units.…”

Section: Introductionmentioning

confidence: 99%

Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and inversion tectonics

Ishiyama

Satō

Kato

et al. 2013

Geophysical Research Letters

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[1] The Tokyo metropolitan area, underlain by Neogene and Quaternary sediments more than 5 km thick, is currently deformed by blind thrusts that could generate hazardous earthquakes. However, their little geomorphic expression and dense urbanization make understanding of folds produced above them and recent deformation highly elusive. Here we show subsurface geometries of several active blind thrusts beneath this highly urbanized area, based on tectonic landforms, high-resolution seismic reflection data, and Quaternary stratigraphy. Deep seismic reflection profiles corroborate the notion that steeply dipping blind thrusts are reactivated normal faults originally formed by middle Miocene extensional tectonics. Despite very slow (less than 0.1 mm/yr) late Quaternary slip rates, our work suggests the presence of previously unrecognized faults that pose seismic hazards to Tokyo and outlying communities, highlighting the need for additional information to define recent slip rates, magnitude, and recurrence of past earthquakes on them.

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Late Quaternary Landform Development of the Kanto Plain

Sugai

Matsushima²,

Ishihara³

2018

International Perspectives in Geography

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Paleoseismic History of the Northern Ayasegawa Fault since the Late Pleistocene Reconstructed from Shallow Sub-surface Deformation Structure

Cited by 9 publications

References 1 publication

Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

Fluvial response to sea-level changes since the latest Pleistocene in the near-coastal lowland, central Kanto Plain, Japan

Active blind thrusts beneath the Tokyo metropolitan area: Seismic hazards and inversion tectonics

Late Quaternary Landform Development of the Kanto Plain

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