Group A, Poster #155, Fault and Rupture Mechanics (FARM)
Seismicity Migration and a Surface Creep Event in 2021 on the Calaveras Fault
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Poster Presentation
2022 SCEC Annual Meeting, Poster #155, SCEC Contribution #12379 VIEW PDF
nia Earthquake Catalog through the combined application of earthquake detection techniques based on template matching (EQCorrscan) and AI-based automatic earthquake phase picking (EQTransformer). After manual inspection, detected earthquakes were preliminarily located using ANTELOPE dbloc2 software followed by double-difference relocation. The improved seismicity catalog indicates that earthquakes located at seismogenic depth (between ~4-10 km) indeed migrated along the fault in a southeast direction during the creep event, but details of this migration timing do not exactly correlate with the creepmeter data. Specifically, slip at the surface begins with a very small amplitude as seismicity migrates directly below the creepmeter and increases to its maximum value about 50 days after the seismicity has passed and deepened. This may reflect a slow vertical migration of the creep event or that creep manifests differently in the shallow and deeper depth ranges.
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