SCRIPPS INSTITUTION OF OCEANOGRAPHY FACULTY CANDIDATE SEMINAR -
DATE: June 4th, Tuesday, 12:45 p.m.
LOCATION: Eckart 227
SPEAKER: Daniel Trugman
Los Alamos National Laboratory
TITLE: Big Data, Small Earthquakes
Understanding the physics of how earthquakes get started remains a longstanding challenge in the earth sciences. Theoretical models of earthquake nucleation and laboratory earthquake experiments both suggest that foreshock seismicity should precede failure in nearly all instances. In the real Earth, however, observations of foreshocks preceding large earthquakes are the exception and not the rule. In this seminar, I will describe how the combination of high-performance computing, waveform similarity search, and unsupervised earthquake relocation enables us to study small magnitude foreshock activity in high resolution in southern California. At these finest of scales, significant foreshock activity in the Earth appears to be ubiquitous, in agreement with both laboratory and theoretical predictions. This study highlights the potential for novel analyses of large datasets with high-performance computing resources to bridge the gap between theory and observations in the geosciences.