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Smith Lecture - Dr. William Frank, Massachusetts Institute of Technology

Capturing the Geodetic Signature of Slow Slip with Tiny Repeating Earthquakes
Friday, February 10, 2023
3:30-4:30 PM
1528 1100 North University Building Map
Slow, aseismic slip (such as slow slip and surface creep) is now recognized as the glue at tectonic plate boundaries that holds the earthquake cycle together. Since the first observations of surface creep along the San Andreas plate boundary more than 50 years ago, advances in geophysical instrumentation and innovative observational approaches have revealed that faulting at major plate boundaries covers a broad spectrum of slip modes, from fast earthquake ruptures to intermittent slow slip.

With seismology as a guide to investigate the geodetic record, GNSS positioning and satellite imagery reveal the jerky, intermittent nature of aseismic slip. The pattern that is emerging suggests that slow slip at plate boundaries and surface creep on major transform faults is not a steady, continuous process as once thought, but is rather a complex spatiotemporal cluster of interacting aseismic transients. These results suggest that slow slip is much more similar to earthquake slip than previously acknowledged, with strong implications on our understanding of the dynamics of active faults.
Building: 1100 North University Building
Event Type: Lecture / Discussion
Tags: Natural Sciences
Source: Happening @ Michigan from Earth and Environmental Sciences