Paleoseismic evidence for coseismic growth-fold in the 1999 Chichi earthquake and earlier earthquakes, central Taiwan

Late Holocene Paleoseismicity of the Southern Part of the Chelungpu Fault in Central Taiwan: Evidence from the Chushan Excavation Site

“…The Chichi earthquake rupture was along the frontal Western Foothills, and is subdivided into the Shihkang, Chelungpu, and Tajianshan faults. CHF, Changhua fault; CLPF, Chelungpu fault; HLF, Houli fault; SKF, Shihkang fault; STF, Shuangtung fault; SYF, Sanyi fault; TJSF, Tajianshan fault; LLF, Luliao fault; KKF, Kukeng fault; (a) the Fengyuan site (Ota et al, 2005(Ota et al, , 2006; (b) the Pineapple field site (W. S. Chen et al, 2004); (c) the Siangong temple site (W. S. Chen et al, 2006); (d) the Wanfung site (W. S. Chen et al, 2001b); (e) the Shijia site (W. S. Chen et al, 2006;A. R. Streig et al, unpublished manuscript, 2006); (f) the Mingjian site (W. S. Chen et al, 2001a); and (g) the Chushan site (this study).…”

Characteristics of Coseismic Thrust-Related Folding from Paleoseismic Investigation Responsible for the 1999 Chi-Chi Earthquake of Central Taiwan

“…A corresponding gravel bed between boreholes T1 and T2 is offset to a height of 40 m on both sides of the fold scarp, indicating that several large earthquakes have occurred. Based on the syntectonic sedimentary structure, we infer that five paleoearthquake events including the Chi-Chi earthquake occurred near 1960-1810 yr BP (G3 event) and 3160-2840 yr BP (G4 event); however, we have not been able to obtain age control for the G1 and G2 events (Chen et al, 2007b). Fig.…”

“…The fluvial cobble deposits between boreholes S2 and S3 offset about 6-m high in both sides of the fold scarp. deposits yields eleven radiocarbon ages; the upper part of cw3 unit: 800-660 yr BP and 940-700 yr BP, thus indicating the depositional age of 940-660 yr BP; cw2 unit: 790-640 yr BP, 740-550 yr BP, and 710-620 yr BP, indicating the depositional age of 790-550 yr BP; cw1 unit: 280-0 yr BP (Chen et al, 2007b). Borehole S1 and S2, which were drilled on the hangingwall, showed the location of the fault zone at a depth of 20.7 m and 30 m in borehole S1 and 13 m in borehole S2, where Pliocene shale is displaced over gravel deposits (Fig.…”

Trenching exposures of the surface rupture of 2008 Mw 7.9 Wenchuan earthquake, China: Implications for coseismic deformation and paleoseismology along the Central Longmen Shan thrust fault

“…On the other hand, paleoseismicity along a thrust fault has also been discussed by combining trench with the geomorphic observations (Philip et al, 1992;Lee et al, 2001;Chen et al, 2004Chen et al, , 2007b. These studies provide help for our understanding the activity of a thrust fault in Longmen Shan region.…”