Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011e%26psl.301..337g&link_type=abstract
Earth and Planetary Science Letters, Volume 301, Issue 1-2, p. 337-344.
Mathematics
Logic
1
Scientific paper
We present new space geodetic data indicating that the present slip rate on the Hunter Mountain-Panamint Valley fault zone in Eastern California (5.0 ± 0.5 mm/yr) is significantly faster than geologic estimates based on fault total offset and inception time. We interpret this discrepancy as evidence for an accelerating fault and propose a new model for fault initiation and evolution. In this model, fault slip rate initially increases with time; hence geologic estimates averaged over the early stages of the fault's activity will tend to underestimate the present-day rate. The model is based on geologic data (total offset and fault initiation time) and geodetic data (present day slip rate). The model assumes a monotonic increase in slip rate with time as the fault matures and straightens. The rate increase follows a simple Rayleigh cumulative distribution. Integrating the rate-time path from fault inception to present-day gives the total fault offset.
Amelung Falk
Dixon Timothy H.
Gourmelen Noel
Schmalzle Gina
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