The 2007 Noto Peninsula, Japan, Earthquake (Mw 6.7): Damage to Wooden Structures

Yamada, Masumi; Park, Sun-Cheon; Mori, Jim

doi:10.1785/gssrl.79.1.20

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…These hazard curves are compared with those obtained from the damage of past major earthquakes (Murao and Yamazaki 2002;Hayashi 2004;Sakai et al 2006;Yamada et al 2008). Because both the damage ratio of the wooden houses and the estimated ground motions include the estimation error, we obtained the regression equation by the orthogonal regression.…”

Section: Discussionmentioning

confidence: 99%

Studies on the 2011 Off the Pacific Coast of Tohoku Earthquake

Kawase¹

2013

Natural Disaster Science and Mitigation Engineering: DPRI Reports

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Section: Discussionmentioning

confidence: 99%

Studies on the 2011 Off the Pacific Coast of Tohoku Earthquake

Kawase¹

2013

Natural Disaster Science and Mitigation Engineering: DPRI Reports

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“…The strong ground motions during this event caused significant damage over a wide area in the Noto peninsula, including Wajima city and Anamizu town, for wooden houses in particular, which are typical residences in Japan (e.g., Nishida et al, 2007;Yamada et al, 2008). These strong ground motions were densely observed by the nationwide digital strong-motion seismograph networks, K-NET (Kinoshita, 1998) and KiK-net (Aoi et al, 2000), both installed by NIED. A peak ground velocity of 103 cm/s was observed during the mainshock at a K-NET strong-motion station, ISK005, in Anamizu town.…”

Section: Introductionmentioning

confidence: 99%

Source-Rupture Process of the 2007 Noto Hanto, Japan, Earthquake Estimated by the Joint Inversion of Strong Motion and GPS Data

Asano¹,

Iwata²

2011

Bulletin of the Seismological Society of America

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The source-rupture process during the 2007 Noto Hanto earthquake, which was a reverse-faulting event located near the western coast of the Noto peninsula in central Japan, was estimated by the kinematic linear waveform inversion method. The waveform inversion was conducted by jointly using velocity waveforms recorded at 12 near-source strong-motion stations and static horizontal displacements recorded at 19 Global Positioning System (GPS) stations. In order to implement reliable Green's functions into the inversion, a one-dimensional underground velocity structure for each individual strong-motion station was modeled through waveform modeling of an aftershock. The waveform inversion result showed the following image of the source-rupture process. The larger slip concentrated in the vicinity of the hypocenter, and it extended to the shallow portion of the source fault with a maximum slip of 5.1 m. The whole source process was characterized by the total seismic moment of 1:57 × 10 19 N•m (M w 6.7) with the rupture duration of approximately 9 s. The obtained source model explained observed strong ground motions and GPSmeasured static horizontal displacements well. The slip distribution correlated well with the spatiotemporal aftershock distribution, and the northeast end of the rupture was blocked by the resistive structure in the crust. From these facts, the 2007 Noto Hanto earthquake could be concluded as reactivation of preexisting seafloor active faults, F14 and F15, which were reported by the previous geophysical and geological surveys off the shore of the Noto peninsula.

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“…50％の建物全壊率を与える地震動は、PGAで1792cm/s 2 、PGVで170cm/sである。この被害率曲線を過去の被害地震の調査結果 5,[10][11][12] と比較した。既往の研究で得られたPGV-被害率のサンプルと、被害率曲線を図10に示す。長野県栄村の被害率は1995年兵庫県南部地震の震災復興都市づくり特別委員会が行った被災調査の被害率 10) よりは小さく、2000年鳥取県西部地震 11) や2004年新潟県中越地震 5) と比較すると、120 cm/s以下ではほぼ同等、それ以上では被害率が大きくなっている。栄村は日本有数の豪雪地であり、積雪に備えた建物のメンテナンスが耐震性につながった可能性も考えられる。被害率曲線は、ある閾値を境にして急激に被害率が増加するため、150 cm/s以上でサンプルのない2000年鳥取県西部地震と2004年新潟県中越地震は、地震動が大きい場合適切に評価できない。本研究で求められた被害率曲線では、150cm/sを境にして木造建物の倒壊率が急増し、倒壊率が半数を超える結果が得られた。…”

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Estimation of Strong Motion and Building Damage Survey for the 2011 Northern Nagano Earthquake

Yamada¹,

Yamada²,

Fukuda³

et al. 2012

Journal of JAEE

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We conducted a damage survey of wooden structures and collected very dense ambient noise measurements in the near-source region of 2011 Northern Nagano earthquake. The percentage of totally collapsed buildings exceeded 30% in Aokura and Yokokura districts in Sakae village, Nagano prefecture. The percentage in Mori district, where strong motion was recorded during the mainshock, was less than 10%. We estimated the strong motion in the Aokura and Mori districts from the ambient noise measurements and strong motion records. The estimated strong motion distribution reflects the soil conditions, and varies in that small area. The correlation of estimated strong motion and damage ratio of wooden structures is reasonably high, which indicates the estimated ground motions are realistic. The damage curve obtained from this research shows the collapse ratio exceeds 50% around 150 cm/s of input ground motion.

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The 2007 Noto Peninsula, Japan, Earthquake (Mw 6.7): Damage to Wooden Structures

Cited by 4 publications

References 3 publications

Studies on the 2011 Off the Pacific Coast of Tohoku Earthquake

Studies on the 2011 Off the Pacific Coast of Tohoku Earthquake

Source-Rupture Process of the 2007 Noto Hanto, Japan, Earthquake Estimated by the Joint Inversion of Strong Motion and GPS Data

Estimation of Strong Motion and Building Damage Survey for the 2011 Northern Nagano Earthquake

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