Ph.D. Student Profile: Pamela Moyer
Degree: Earth and Environmental Sciences
Research Topic: Investigating Earthquake Rupture Processes from Source Parameters at Mid-Ocean Ridge Transform Faults and Deep South African Gold Mines
Advisor: Dr. Margaret Boettcher
Description of Research
My research motivation is to better understand earthquake sources and faulting processes at plate boundary and human-induced seismogenic zones. My projects involve the comprehensive examination and comparison of earthquake source parameters such as stress drop, apparent stress, and radiated seismic energy for earthquakes at oceanic transform faults and gold mines in South Africa.
At Gofar transform fault on the East Pacific Rise, thousands of earthquakes were recorded during a one year deployment of ocean bottom seismometers (OBS), including a magnitude 6.0 mainshock and its foreshock, aftershock, and swarm sequences. Using OBS data, I investigate differences between earthquake sources along the ruptured fault segment where variations in fault zone properties are thought to produce rupture patches and rupture barriers that control earthquake propagation.
In gold mines in South Africa, thousands of earthquakes which span five orders of magnitude are recorded by seismometers placed in tunnels 2 to 4 km below the Earth’s surface. Using high-quality, near-source recordings, I constrain earthquake energy budgets for mining-induced seismicity and investigate how rupture mechanisms (shear to isotropic), mining structures (such as faults, dykes, tunnels, and stopes), and stress states are reflected in earthquake source parameters.
Previous Awards and Activities
- Outstanding Student Paper Award, American Geophysical Union Fall Meeting, 2015
- Outstanding Student Poster Award, Geological Society of America, Northeastern Section Meeting, 2013
- College of Engineering and Physical Sciences Graduate Fellowship, University of New Hampshire, 2011-2012
Selected Presentations and Publications
- Moyer, P. A., M. S. Boettcher, J. J. McGuire, and J. A. Collins (2015), Constraining earthquake source parameters in rupture patches and rupture barriers on Gofar transform fault, East Pacific Rise from ocean bottom seismic data, Abstract S51-2635 presented at the 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.
- Moyer, P. A. and M. S. Boettcher (2013), Investigating source properties of mining-induced earthquakes and the resulting seismic hazard in TauTona gold mine, South Africa, Abstract 216554 presented at the 2013 NE GSA Meeting, 18-20 Mar.
- Moyer, P. A., S. L. Bilek, and W. S. Phillips (2011), Apparent Stress Variations near the Osa Peninsula, Costa Rica, influenced by subducted bathymetric features, Geophys. Res. Lett., 38, L02304, doi:10.1029/2010GL045955.
- Moyer, P. A., S. L. Bilek, and W. S. Phillips (2010), Subducted bathymetric features linked to variations in earthquake apparent stress along the northern Japan Trench, Eos Trans. AGU, 91(52), Fall Meet. Suppl., Abstract T51D-2088.
- Moyer, P. A., K. G. Mackey, K. Fujita, S. V. Shibaev, and L. V. Gounbina (2007), Seismicity of the Stanovoi Volcanic Field Region, Eastern Russia, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T13-1628.
- Ph.D., Natural Resources & Earth Systems Science (NRESS), University of New Hampshire, Expected Award Date May 2018
- M.S., Geophysics, New Mexico Institute of Mining and Technology, Awarded December 2010
- B.S., Geological Sciences with Geophysics Option, Michigan State University, Awarded December 2007
- June 2011 – present
Research Assistant, Department of Earth Sciences, University of New Hampshire
Performing source parameter analysis of mid-ocean ridge transform fault earthquakes and mining-induced seismicity
- August 2008 – December 2010
Research Assistant, Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology
Performed seismic coda analysis of subduction zone earthquakes off the coasts of Costa Rica and Northern Japan
- August 2007 – December 2007
Earthquake Analyst, Northeast Russia Seismology Program, Michigan State University
Conducted earthquake analysis and fault location as related to plate tectonic boundaries in Northeast Russia