Using GPS to model slip rate of the San Andreas Fault and other faults within a transect across the plate boundary passing through San Gorgonio Pass

Event Center A & B

Using Global Positioning System (GPS) observations along with a model of elastic motion, the slip rates for the San Andreas Fault (SAF), San Jacinto fault (SJF), and many other faults on the Pacific-North America plate boundary were determined in the vicinity of San Gorgonio Pass. After testing 414,722 slip rate combinations, the slip rate for the San Andreas Fault was determined to be between 4 and 16 mm/yr., with the best fitting slip rate being 8 mm/yr. The slip rate of the San Jacinto fault was determined to be between 6 and 18 mm/yr. with the best fitting slip rate being 18 mm/ yr. Other faults passing through the San Gorgonio Pass transect had slip rates ranging from 0 mm/yr. to 6 mm/yr.