Field relations among coseismic ground motion, water level change and liquefaction for the 1999 Chi-Chi (Mw = 7.5) earthquake, Taiwan

Details Field relations among coseismic ground motion, water level change and liquefaction for the 1999 Chi-Chi (Mw = 7.5) earthquake, Taiwan Field relations among coseismic ground motion, water level change and liquefaction for the 1999 Chi-Chi (Mw = 7.5) earthquake, Taiwan

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30qhls1w&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 17, pp. HLS 1-1, CiteID 1890, DOI 10.1029/2003GL017601

Physics

3

Physical Properties Of Rocks: Fracture And Flow, Seismology: Earthquake Ground Motions And Engineering, Seismology: Seismic Hazard Assessment And Prediction, Structural Geology: Role Of Fluids, Tectonophysics: Continental Margins And Sedimentary Basins (1212)

Scientific paper

Field-based, basin-wide relations are discovered among coseismic ground motion, water-level change and liquefaction induced by the 1999 (Mw = 7.5) Chi-Chi earthquake, Taiwan. The relations imply thresholds of 4.4 m/s2 and 0.6 m/s in the spectral acceleration and velocity at 1 Hz, respectively, below which pore pressure does not change appreciably and above which pore pressure increases exponentially with increasing acceleration and velocity. Liquefaction occurs when the 1-Hz spectral acceleration and velocity and the peak ground acceleration exceed ~16 m/s2, ~2.4 m/s, and ~2.5 m/s2 (~0.26 g), respectively. Broad consistency between the present and previous results suggests that the relations may be transferable to other areas and may provide fundamental constraints for modeling coseismic pore-pressure increase and liquefaction.

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