The USArray is a part of the EarthScope program that was designed to provide a well-distributed and continuous array of seismometers across the United States. A major component of USArray is the Transportable Array (TA), a network of 400 seismic stations that spends ~2 years in a fixed location before being moved to a different location. Here, we describe two projects that use USArray seismic data to investigate seismic wave propagation across the continent. First, we take advantage of the fact that earthquakes tend to occur again and again in the same locations. We generate â€œcomposite eventsâ€ of seismic data generated by nearly co-located events that occurred at different points in time. This results in an image of the seismic waveform that covers a much larger swath of the continent than is possible with a single earthquake. Second, we take advantage of having the seismic waveform for a large swath of the continent to identify wavefronts and the ray paths that are normal to these wavefronts.
Roque Soto Castaneda,
"Analyzing USArray Seismic Data to Study the Mantle Beneath North America"
Summer Research Symposium.
Brown Digital Repository. Brown University Library.
Each year, Brown University showcases the research of its undergraduates at the Summer Research Symposium. More than half of the student-researchers are UTRA recipients, while others receive funding from a variety of Brown-administered and national programs and fellowships and go …