Vedran Lekic
Postdoctoral mentor
Primary research at the University of Maryland (UMD) is conducted in Professor Vedran Lekic’s Seismology lab. Under his supervision, I work on using novel inversion techniques to constrain a multi-parameter elastic model of the United States continental crust. Professor Lekic works on using both observational, theoretical, and computational infrastructure to image Earth’s interior structure. Follow links below for more
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Roberta Rudnick
Postdoctoral Mentor
The broader goal of my research at UMD is to utilize the new seismological constraints obtained from Earthscope's USArray to improve our understanding of the structure, composition and evolution of Earth’s continental crust. Working with Professor Roberta Rudnick I am developing insights on how to combine seismological data with the petrological, geochemical and heat-flow database.
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Bill McDonough
Postdoctoral Mentor
Improved constraints on crustal composition includes the heat producing elements in the crust. By applying crustal corrections, better estimates of the mantle contribution to heat loss and convective vigor can be estimated. Collaborating with Bill and his graduate student (Scott Wipperfurth), we hope to use the new crustal models to estimate Earth’s thermal budget by incorporating geoneutrino measurements.
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Jeffrey Park
Ph.D. advisor
Seismology and time-series data analysis research started in Jeff'’s lab. Our past and ongoing research work involves development and application of new techniques for stacking forward scattered waves (receiver functions) e.g. harmonic decomposition, tilt-move-out stacking, multi-layer H-k stacking etc. We have applied this technique to the crustal structure of Pacific ocean islands and ocean bottom stations.
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Shun-ichiro Karato
Ph.D. advisor
Professor Karato continues to drive my hypothesis-driven investigations of the mechanisms that cause elastic weakness across the lithosphere asthenosphere transition. We apply mineral physics theory and experiments to explain our seismological observations. This involved numerical and statistical modeling of experimental data on by grain-boundary relaxation, which has been applied in continental and oceanic settings (see publication list).
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Alain Plattner
Collaborator
Dr Plattner's background is in computational geophysics (PhD at ETH Zurich) and mathematics (M.Sc. at University of Basel). In collaboration with other group members, he is lending his expertise on multi-taper Slepian spectral analysis to the different tomography image analysis projects I'm involved with: at different regional (US crust), global (global lower mantle heterogeneity) and length scales (ambient noise, body waves, surface waves etc.).
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D. Sarah Stamps
Collaborator
Dr. Stamps and I are co-supervising a PhD. student at Virginia Tech - Emmanuel Njinju. Emmanuel's project will integrate seismological and geodesic constraints from EarthScope to better understand the tectonic and geodynamic evolution of the continental lithosphere. We explore how the different approaches to describing temperature distribution in the lithosphere affects convection.
Masanao Shinohara
Research Support
Professor Shinohara (and Hitoshi Kawakatsu) have provided me with data support and access to very valuable normal ocean-bottom seismic data collected in the North-west pacific and the Western Philippine sea. This data-set is crucial to testing the predictions of the mineral physics model applied to the seismological weakness across the lithosphere asthenosphere transition. We are finalizing publications on our findings.
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Scott Burdick
Research Colleague
Scott and I are exploring how we can apply various seismological techniques and tools to explore targeted regional questions in the continental US e.g. Rifting in the continental USA. Scott works on a variety of problems from probabilistic tomography to waveform migration, and wave-equation modeling. His experience allows us to tackle a variety of interesting problems at the seismology lab here at UMD
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Raj Moulik
Research Colleague
Raj has worked on building global earth models using various seismic data sets. At UMD he is working a collaborative project to build a new reference earth model - REM-3D. He and I are working to test my newly developed anisotropic Transdimensional tomography code (TranstomoAni). To do this we conduct recovery tests using synthetic 2D anisotropic models.
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Chao Gao
Ph.D. candidate
Chao is a PhD student in Dr.Vedran Lekic‘s Seismology lab. Much of his current work is devoted to Transdimensional inversion with different seismological observations. We are working on using ambient noise Love and Rayleigh wave measurements to constrain radial anisotropy across the US. The tools and techniques are being used to build a 3D model of the US crust by jointly inverting a compendium of geophysical data e.g. ambient noise, surface wave ellipticity and receiver functions.
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Julie Schnurr
Undergraduate Alumni
Julie worked with me over the summer of 2015. We worked on supplementing ambient noise measurements of ZH ellipticity with those from earthquake data and at longer periods, which provide unique information on lithospheric density. She presented her work at the 2015, AGU (Schnurr et al., 2015). She is now a graduate student at the University of Hawaii
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Liam Shaughnessy
Undergraduate Mentee
Liam is a sophomore at the University of Maryland; He is a physics major interested in both seismology and planetary geology. Liam is continuing Julie's work on Rayleigh wave ellipticity measurements across the entire earthscope USArray. He is compiling a complete data set of earthquake waveforms while using synthetic waveforms to investigate sources of uncertainties in the measurement.
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Erin Cunningham
PhD. Candidate
As a 2012 Incorporated Research Institutions for Seismology (IRIS) summer intern hosted jointly by the University of Maryland Seismology Lab and IRIS Headquarters in Washington, DC, Erin analyzed shear-to-compressional (and vice versa) wave conversions to constrain variations in lithospheric thickness across the Eastern United States using data gathered by the EarthScope USArray Transportable Array. Erin is currently a student at Tulane University. She presented her work at the American Geophysical Union Fall Meeting in San Francisco: Cunningham, E.E., Frassetto, A., Lekic, V. Obtaining interpretable receiver functions to study lithospheric structure in the central US, AGU Fall Meeting, T53C-2722, 2012.
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Tolulope Olugboji
Principal Investigator
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