Review of paleoseismological and active fault studies in Taiwan in the light of the Chichi earthquake of September 21, 1999

Ôta, Yôko; Chen, Yue‐Gau; Chen, Wen-Shan

doi:10.1016/j.tecto.2005.05.040

Cited by 30 publications

(22 citation statements)

References 22 publications

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“…This large seismic event also triggered a large scientific effort for a better knowledge of the potential seismogenic sources in the whole Taiwan area (e.g., Shyu et al, 2005). The fact that the coseismic rupture of the Chi-Chi earthquake was located exactly at the toe of cumulated Pleistocene geomorphic scarps marked a turning point for morpho-tectonic studies in Taiwan Ota et al, 2005). During the decade following the Chi-Chi earthquake, the emergence of applications using digital elevation models (DEMs) with increasing resolution facilitated, and significantly improved, geological and geomorphic mapping of active faults (e.g., Shyu et al, 2005;Lai et al, 2006;Ota et al, 2006).…”

Section: Geodynamic and Geological Contextsmentioning

confidence: 99%

Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

Siamé

Chen

Derrieux

et al. 2012

Journal of Asian Earth Sciences

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Section: Geodynamic and Geological Contextsmentioning

confidence: 99%

Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

Siamé

Chen

Derrieux

et al. 2012

Journal of Asian Earth Sciences

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“…The 1935 Tuntzuchiao earthquake ( M L = 7.1) took place in central Taiwan, which resulted in 3000 casualties and damaged 17 000 buildings (Ota et al . 2005).…”

Section: Discussionmentioning

confidence: 99%

“…This earthquake generated two earthquake faults (Shihtan and Tuntzuchiao Faults) (Otuka 1936). The high‐angle Shihtan Fault has a general northeast–southwest trend and displays reverse and left‐lateral strike‐slip movement, while the Tuntzuchiao Fault consists of en echelon short cracks (Ota et al . 2005).…”

Section: Discussionmentioning

confidence: 99%

Review and new interpretation for the propagation characteristics associated with the 1999 Chi‐Chi earthquake faulting event

Jin

Kim

2010

Island Arc

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The Chi-Chi earthquake (M W = 7.6) took place in central western Taiwan in 1999. The earthquake caused reactivation of the Chelungpu Fault and resulted in 100-km-long surface ruptures. The fault strikes mostly north-south to NNE-SSW; however, the northern tip of the southern segment of the surface ruptures rotates clockwise to define an east-west trend, then jumps to a shorter NNW-trending rupture. The largest vertical displacement is recorded in the Shihkang area of the Shihkang-Shangchi Fault Zone, where vertical slips are up to 8-10 m. The Shihkang-Shangchi Fault Zone displays a complex fault pattern as a linkage damage zone between two fault segments with the greatest concentration of faults and fractures. Our new interpretation, based on recent published geometric, kinematic, and geophysical studies on the Chi-Chi earthquake fault, suggests that the Shihkang-Shangchi Fault Zone is not a simple termination zone, but may be an 'overstep zone' or a 'transfer zone'. Slip analysis along the surface ruptures indicates that they are composed of three fault segments and the amount of slip partly depends on the intersection angle between slip direction and fault strike. Our numerical modeling for the area indicates that Coulomb stress changes are mainly concentrated on tips and bends of the surface ruptures. Slip patterns indicate that the fault propagates toward the northeast. Therefore, this study suggests high potential for future earthquake activity along the unruptured Shangchi segment. Hence, future geohazard studies should focus on the Shangchi segment to evaluate potential earthquakes, determine recurrence intervals, and reduce future earthquake hazards.

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“…Because of restrictions on available land for trenching, we excavated the trench oblique to (Ota et al 2005). Our trench site is located closely to the northernmost section of the Chelungpu fault; (c) The location of Fengyuan trench site in relation to terraces and faults (after Ota et al 2004 for the mapping of terraces and active faults).…”

Section: Methodsmentioning

confidence: 99%

“…Although 14 trenches have been excavated across the Chelungpu fault ( Fig. 1b; Ota et al 2005 ), most are concentrated along the central part of the fault. Because the 90-km long Chelungpu fault may be segmentated Rubin et al 2001), the timing and frequency of paleoearthquakes could differ from place to place.…”

Section: Introductionmentioning

confidence: 99%

Low-Angle Reverse Faulting During Two Earthquakes on the Northern Part of the Chelungpu Fault, Deduced From the Fengyuan Trench, Central Taiwan

Ôta¹,

Shishikura²,

Ichikawa³

et al. 2007

Terr. Atmos. Ocean. Sci.

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ABSTRACT1 Yokohama National University, Yokohama, Japan Terr. Atmos. Ocean. Sci., Vol. 18, No. 1, March 2007 56 for horizontal and ca. 5 m for vertical) than those (2.7 m for horizontal and ca. 2 m for vertical) of the 1999 earthquake. The age of the penultimate earthquake at the Fengyuan site is the oldest earthquake recorded among the known penultimate penultimate events on the Chelungpu fault so far and suggests that this part of the Chelungpu fault may be a fault segment independent of the central and southern parts of the fault.

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Review of paleoseismological and active fault studies in Taiwan in the light of the Chichi earthquake of September 21, 1999

Cited by 30 publications

References 22 publications

Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

Pleistocene alluvial deposits dating along frontal thrust of Changhua Fault in western Taiwan: The cosmic ray exposure point of view

Review and new interpretation for the propagation characteristics associated with the 1999 Chi‐Chi earthquake faulting event

Low-Angle Reverse Faulting During Two Earthquakes on the Northern Part of the Chelungpu Fault, Deduced From the Fengyuan Trench, Central Taiwan

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