Using Git for Team Collaboration
Tutorial on how to use Git and GitHub for team collaboration on a project. Content includes installing, setting up, creating a repository, making commits, un...
Prof. Barbara Romanowicz
Professor of the Graduate School, Department of Earth and Planetary Science, UC Berkeley
Whole-mantle depth cross-sections of relative shear-velocity variations in model SEMUCB-WM14, in the vicinity of major hotspots. [French et al., 2015]
GitHubThe Global Seismology Research Group resides at UC Berkeley, within the Department of Earth and Planetary Science and the Berkeley Seismological Laboratory.
Our research focuses on improving our understanding of the present day structure and internal dynamics of our planet, from the crust to the inner core, using seismic imaging approaches. We tackle the development and application of new methods for the computation of the seismic wavefield in complex 3D media, with a focus on complex structure in the deep mantle, and for tomographic imaging of elastic and anelastic structure using full waveform inversion (FWI), at the global and regional scale. For our applications, we make use HPC supercomputing facilities at NERSC and ACCESS. One of our recent interests is in the development and implementation of "Box Tomography", i.e. how to perform FWI of remote target regions in the deep earth at the short periods relevant to teleseismic observations, while keeping the computational cost manageable.
One of our more exotic research directions concerns the Earth's "hum" and the insights it brings to ocean/atmosphere/solid earth interactions. In order to better understand the chemical and thermal state of the mantle and the processes operating therein, we also seek to apply the latest findings of the mineral physics community within the context of our seismic probing and geodynamic modeling.
We also have an interest in the of study earthquake source mechanisms and scaling laws, as well as global seismic moment release and its relation to plate tectonics.
Our research is supported through a variety of sources, mostly through grants from NSF.
Recent posts
Dynamic History of Inner Core
Progressive crystallisation of Earth’s inner core drives convection in the outer core and magnetic field generation. Determining the rate and pattern of inne...
Upper mantle velocity structure can contaminate differential travel-time measurements and bias estimates of inner core anisotropy causing the “Alaska anomaly”
Using a regional tomographic model of the Alaskan upper mantle to predict upper mantle effects on PKP travel times, we show that the signature of the Alaska ...
Array measurements of inner core waves in Alaska show perturbations in direction and travel time by the subducted Pacific plate
Based on the PKPdf observations and our new tomography model of the upper mantle beneath Alaska, we conclude that at least 2 s of the travel time anomaly oft...
Seismic evidence for partial melting at the root of major hot spot plumes
Ultralow-velocity zones are localized regions of extreme material properties detected seismologically at the base of Earth’s mantle. Their nature and role in...
Theoretical wave propagation
Explore seismic wave propagation using normal modes, NACT, and advanced theoretical models for global tomography.
Superplumes from the Core-Mantle Boundary to the Lithosphere: Implications for Heat Flux
Superplumes from the Core-Mantle Boundary to the Lithosphere: Implications for Heat Flux
An unsually large ULVZ at the base of the mantle near Hawaii
Previous studies have documented the presence of ultra-low-velocity-zones (ULVZs) at the base of the mantle, through observations of body wave complexities. ...
Instrumenting the Ocean Floor
This is a collaborative project between the Berkeley Seismological Laboratory (BSL) and the Monterey Bay Aquarium Research Institute (MBARI)
Observation of the elusive PKJKP
We document a high signal to noise phase that agrees with theoretical predictions for PKJKP. Envelope modeling of the PKJKP waveform implies a slightly large...