Geological Development of the West Sea Area of the Noto Peninsula District in the Neogene Tertiary to Quaternary, Central Japan

Katagawa, Hideki; Hamada, Masaaki; Yoshida, Susumu; Kadosawa, Hiroshi; Mitsuhashi, Akira; Kono, Yoshiteru; Kinugasa, Yoshihiro

doi:10.5026/jgeography.114.5_791

Cited by 26 publications

(54 citation statements)

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“…Red shaded rectangle denotes rupture area of the 2007 Noto Hanto earthquake [after Awata et al, 2008], and stars denote mainshock epicenters. Onshore faults are based on data from the Research Group for Active Faults of Japan [1991], and offshore faults and folds are compiled from Katagawa et al [2005] and Okamura [2007]. Site localities: Na, Nagatejima; Ta, Takahama; Mo, Momoura; Ka, Kabutoiwa; Ha, Hatagoiwa; Am, Amamisaki; Ku, Kurasaki; Se, Sekinohana; Ak, Akakamizaki; Wa, Wajima.…”

Section: Resultsmentioning

confidence: 99%

“…As no other large earthquakes suitable for explaining the emergence event have been documented in this area, the low paleo-shoreline trace is considered to be associated with the 1892 earthquakes. Although a small number of minor faults near the epicenters of the 1892 events have been mapped onshore by the Research Group for Active Faults of Japan [1991], and offshore by Katagawa et al [2005] and Okamura [2007] (Figure 1), the source fault model of the 1892 earthquakes has yet to be specified. The present data therefore represent the first quantitative report of constraining the source area for this earthquake.…”

Section: Low Paleo-shorelinementioning

confidence: 99%

“…220°N, 136.985°E at a depth of 11 km (Figure 1), with aftershocks extending along a NE -SW strike over an area 25 km long and 10 km wide. This distribution of events coincides with the hanging-wall region of a previously mapped active submarine thrust fault [Katagawa et al, 2005;Okamura, 2007]. Geodetic data, including leveling, global positioning system (GPS), interferometric synthetic aperture radar (InSAR), and tide gauge observations indicate that the earthquake produced an uplift of up to 50 cm [Ozawa et al, 2008] and a small tsunami with a maximum height of 20 cm [Namegaya and Satake, 2008].…”

Section: Introductionmentioning

confidence: 99%

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Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Shishikura

Echigo²,

Namegaya

2009

Geophysical Research Letters

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Raised shorelines on the Noto Peninsula on the western coast of central Japan suggest a millennial history of recurrent uplift. Emergence of the coastline by up to 50 cm was recently recorded in association with a moderate earthquake (Mw 6.7) on 25 March 2007. The shoreline uplift is indicated by the displacement of sessile organisms such as calcareous tubeworms, which can also be examined as indicators of past shifts in shoreline level. Three levels of pre‐2007 paleo‐shorelines are thus identified on this stretch of the Japan Sea coast. The lowest of these, dated at AD 1720–1950, tilts northward away from the likely source of a pair of ca. M 6.4 earthquakes in 1892, which occurred in a different area to the 2007 earthquake. The middle paleo‐shoreline, dated at AD 1430–1655, records a 30–40 cm emergence that may be aseismic. The high paleo‐shoreline, dated at AD 1025–1235, records a coseismic uplift of 50 cm and is limited to the area raised coseismically in 2007. The most recent event preceding the 2007 earthquake thus appears to have occurred approximately 1000 years ago.

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Section: Resultsmentioning

confidence: 99%

Section: Low Paleo-shorelinementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Shishikura

Echigo²,

Namegaya

2009

Geophysical Research Letters

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“…6. Comparison between surface traces of active faults revealed by a previous marine survey (Katagawa et al, 2005;Okamura, 2008) and the hypocenter distribution, which is a combined result by a temporal land seismic network and our results. Size of circles corresponds to magnitude, and focal depths are distinguished by a color code.…”

Section: Discussionmentioning

confidence: 99%

“…Upper: Distribution of epicenters of the aftershocks. Black lines named as F14, F15, F16 show active faults by Katagawa et al (2005), and pink line shows active faults by Okamura (2008). Open and solid black stars indicate epicenter of the mainshock and a largest aftershock in onshore region determined by Sakai et al (2008), respectively.…”

Section: Discussionmentioning

confidence: 99%

Aftershock observation of the Noto Hanto earthquake in 2007 using ocean bottom seismometers

et al. 2008

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The Noto Hanto earthquake in 2007 (M j 6.9) occurred on March 25, 2007 near the west coast of the Noto peninsula, Honshu, Japan. To study the aftershock activity under the sea, we deployed pop-up type ocean bottom seismometers (OBSs) from April 5 to May 8, 2007. We combined data from ten ocean bottom and four onshore seismic stations located around the rupture area of the earthquake and determined the preliminary distribution of the aftershocks. Most of the offshore aftershocks are located in a depth range between 2 and 10 km, and no earthquakes are observed in the lower crust. Hypocenters of deep events occurring at depths greater than 5 km are confined to an area northeastward from the largest aftershock in offshore region. Most of the aftershocks aligned along a high angle and southeast dipping plane, which is consistent with the geometry of the active faults revealed by previous seismic reflection surveys.

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Step-like migration of early aftershocks following the 2007 M_w 6.7 Noto-Hanto earthquake, Japan

Kato

Obara

2014

Geophys. Res. Lett.

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Seismic data reveal that the aftershock zone expands with time after a main shock event. Here we examine the aftershock sequence recorded during the first 32 days following the 2007 Noto-Hanto earthquake, Japan. By applying a matched-filter technique to the data, we detected about 10 times more events than those listed in the routinely constructed earthquake catalog. The aftershock area expanded along the fault strike as a logarithmic function of time, beginning immediately after the main shock. Aftershock expansion toward the SW was especially extensive and developed more rapidly than toward the NE. Interestingly, the aftershock area expanded in a step-like manner by the activation of a series of spatially clustered seismic bursts. Spatial correlation between the aftershock extension and the afterslip distribution suggests that the expansion of the aftershock area could be mainly driven by aseismic afterslip. The aftershock area continues to expand, even though 7 years have now passed since the main shock.

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Geological Development of the West Sea Area of the Noto Peninsula District in the Neogene Tertiary to Quaternary, Central Japan

Cited by 26 publications

References 3 publications

Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Aftershock observation of the Noto Hanto earthquake in 2007 using ocean bottom seismometers

Step-like migration of early aftershocks following the 2007 M_w 6.7 Noto-Hanto earthquake, Japan

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Geological Development of the West Sea Area of the Noto Peninsula District in the Neogene Tertiary to Quaternary, Central Japan

Cited by 26 publications

References 3 publications

Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Evidence for coseismic and aseismic uplift in the last 1000 years in the focal area of a shallow thrust earthquake on the Noto Peninsula, west‐central Japan

Aftershock observation of the Noto Hanto earthquake in 2007 using ocean bottom seismometers

Step-like migration of early aftershocks following the 2007 Mw 6.7 Noto-Hanto earthquake, Japan

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Step-like migration of early aftershocks following the 2007 M_w 6.7 Noto-Hanto earthquake, Japan