Heat signature on the Chelungpu fault associated with the 1999 Chi-Chi, Taiwan earthquake

Details Heat signature on the Chelungpu fault associated with the 1999 Chi-Chi, Taiwan earthquake Heat signature on the Chelungpu fault associated with the 1999 Chi-Chi, Taiwan earthquake

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3314306k&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 14, CiteID L14306

Physics

28

Physical Properties Of Rocks: Thermal Properties, Seismology: Earthquake Dynamics (1242), Tectonophysics: Heat Generation And Transport, Tectonophysics: Rheology And Friction Of Fault Zones (8034)

Scientific paper

We have made observations of a heat signature that is associated with the frictional heat generated at the time of faulting for a large earthquake. Temperature measurements in a borehole that intersects the Chelungpu fault at a depth of about 1100 m, show a small increase near the fault even six years after the earthquake. The temperature signature has a symmetric shape with a width of about 40 m and is centered on the fault that slipped about 5 m during the 1999 Chi-Chi, Taiwan earthquake. The small amplitude of 0.06°C for the observed temperature anomaly indicates a very low level of friction that generated heat at the time of the earthquake.

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