Project Grant 2341238

Award Date 4/1/24
Completion Date 3/31/27
Dollars Obligated $140K
Federal Grant Program
47.050
Assistance Type
Project Grant
Place of Performance
Tempe, AZ 85281, USA
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This $139,967 Project Grant awarded by the National Science Foundation's Geosciences program (CFDA 47.050) will fund a collaborative research effort to advance capabilities for modeling ultra-low velocity zones (ULVZs) at the Earth's core-mantle boundary. The project will:

  1. Collect a new database of ULVZ-sensitive seismic waveforms from sources in South Korea, Taiwan, Japan, and the International Monitoring System arrays.
  2. Develop a Bayesian waveform inversion approach to quantitatively characterize ULVZ properties like seismic velocities, density, size, and shape.
  3. Analyze the waveform effects of 2D/3D ULVZ structures and search for new seismic arrivals consistent with 3D ULVZ features.
  4. Relate observed ULVZ characteristics to lower mantle flow and dynamics through 3D geodynamic modeling.

This collaborative effort between the University of Utah, Arizona State University, and the University of Leeds will help provide greater insights into the formation, properties, and role of these enigmatic features at the core-mantle boundary. The project will also include annual STEM outreach events for K-8 students in the local Utah Pacific Island community.

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