Journal
SCIENCE
Volume 289, Issue 5482, Pages 1178-1182Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.289.5482.1178
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The Hayward fault slips in large earthquakes and by aseismic creep observed along its surface trace. Dislocation models of the surface deformation adjacent to the Hayward fault measured with the global positioning system and interferometric synthetic aperture radar favor creep at similar to 7 millimeters per year to the bottom of the seismogenic zone along a similar to 20-kilometer-long northern fault segment, Microearthquakes with the same waveform repeatedly occur at 4- to 10-kilometer depths and indicate deep creep at 5 to 7 millimeters per year. The difference between current creep rates and the long-term slip rate of similar to 10 millimeters per year can be reconciled in a mechanical model of a freely slipping northern Hayward fault adjacent to the locked 1868 earthquake rupture, which brake the southern 40 to 50 kilometers of the fault. The potential for a major independent earthquake of the northern Hayward fault might be Less than previously thought.
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