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Area Balancing Method as a Useful Tool to Estimate the Depth of the Chi-Chi Earthquake Rupture at the Fengyuan Well
Terrestrial, Atmospheric and Oceanic Sciences
The 1999 Chi-Chi earthquake, M w = 7.6, was associated with a near 100-km-long surface rupture along which the horizontal slip and vertical displacement reached to 9 m and 4 m, respectively, according to coseismic GPS slip vectors. After the Chi-Chi earthquake, drilling projects were conducted to clarify the characteristics of the earthquake rupture in depth. At the Fengyuan site, inclined-well drilling was performed at an angle of 50 degrees westward to a drilling depth of 455.3 m in thedoi:10.3319/tao.2006.17.3.489(t) fatcat:xozwul6lbjfyja6zgesgaicsoa