UMass Amherst Geoscientist Receives $525,000 Grant to Study Earthquake Zones Around the World

June 4, 2018

AMHERST, Mass. – Geoscientist Haiying Gao, a seismologist at the University of Massachusetts Amherst, recently received a five-year, $525,800 faculty early career development (CAREER) grant from the National Science Foundation (NSF) to model and compare five subduction zones across the globe where large earthquakes have occurred, for the first time characterizing their fundamental differences and similarities.
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Gao is an expert in studying the tectonic activities in these zones, areas where two plates in the earth’s crust meet and the oceanic plate slides underneath the continental plate. Subduction zones play a major role in driving plate tectonics and are “host” to great earthquakes, volcanic eruptions, tsunamis and landslides, she notes. A recent study showed that most subduction zones can generate earthquakes of magnitude 8.5 or higher.
Gao says, “We know that plate tectonic activity takes place all over the world, but earthquakes and volcanoes are not distributed evenly. I want to understand what controls the variation we observe in large earthquakes at these points in a more global way, to try to identify some wider fundamentals taking place in the subduction systems, which are related to deeper processes in the earth. I want to know more about what contributes to the variation we see,” she adds.
Her advanced modeling techniques rely on sensor data from both land-based and expensive, difficult-to-deploy and maintain deep-ocean seismic stations. Contributing to the timeliness of her NSF grant is the fact that a network of seismic stations in Alaska has just come online this spring. Gao says, “There is now a huge amount of data, more than before, coming in from the Alaska stations. We definitely are going to have a much better understanding in the next five years from Alaska seismic data.”
She will use the Massachusetts Green High Performance Computing Center’s capability of handling such huge sets of sensor data as input to her advanced methods of seismic imaging. She will compare characteristics of subduction zones in Alaska, New Zealand, South America, Central America, and the Caribbean, and model earthquake propagation.
“It requires huge computations, but they will allow much higher resolution models than before,” Gao notes. “By comparing these five systems, it should allow us to understand if subduction is more of a single global process or if the variations we observe are controlled by local or regional processes, or more likely a combination of both.”
She adds, “If we find some unique feature in one area, we can look into its effects. It would be really hard to tell what’s at work by studying just one zone. I’m hoping we find something similar to all five, but any similarities and differences we can model will be useful and will add to our understanding.”

Seismologist Haiyung Gao uses UMass Amherst high-performance computing resources housed at MGHPCC in her work simulating wave propagation during earthquakes.

Gao says her improved models could someday be useful in predicting how much ground motion or displacement will occur with a massive earthquake.
This research will be complemented by education and outreach that will include Gao developing a summer seismology workshop for Five College undergraduates. She also plans to introduce earth science to middle and high school-age girls through the Holyoke-based Girls Inc. Eureka! Program, and she will reach out to the general public using a Transportable Array seismic station, once part of a network of 400 high-quality broadband seismographs and atmospheric sensors operated at temporary sites across the continent.
The CAREER award is the NSF’s highest award in support of junior faculty who exemplify the role of teacher-scholars through outstanding research, excellent education and integrating education and research with their institution’s mission.


Haiyung Gao


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