Event Category: ERL Events

Dr. Brad Lipovski, Postdoctoral Fellow at Harvard, presents “Stick-Slip Motion of the Antarctic Ice Sheet” at the MIT Earth Resources Lab. “The reactivation of a single dormant Antarctic ice stream would double the continent’s mass imbalance. Despite importance of understanding the likelihood of such an event, direct observation of the basal processes that lead to…

Laura-May Baratin, PhD Candidate at Victoria U. of Wellington, presents “The Deep Fault Drilling Project, Alpine Fault: Getting inside the earthquake machine.” “The Deep Fault Drilling Project (DFDP) is an multinational scientific drilling effort to study the structure, evolution and seismogenesis of the New Zealand Alpine Fault via in-situ measurements of fault rock properties. The Alpine…

Lapo Boschi, Visiting Researcher at the Earth Sciences Institute of Paris, presents “Ambient-noise and coda interferometry in theory, in the laboratory and in the field.” “Cross-correlating an approximately diffuse background signal recorded at a pair of receivers is an efficient and useful way of measuring the impulse response (Green function) of a medium. This technique has…

Yanhua Yan, Graduate Student at Princeton U., presents “Double-Difference Adjoint Full-Waveform Seismic Tomography in Exploration Seismology, Earthquake Seismology, Geoengineering”. “Convergence and stability of seismic full-waveform adjoint schemes are greatly improved when data and synthetics are progressively presented to the inversion algorithms in a constructive multiscale approximation using a wavelet transform. Surface waves, when properly accounted…

Dr. Loic Viens, Postdoctoral Fellow at Harvard U., presents “Simulations of long-period ground motions from a large earthquake using finite rupture modeling and the ambient seismic field”. “Long-period ground motions generated by large earthquakes slowly attenuate with distance and can be significantly amplified by local velocity structures even at large distances. We take advantage of…

Gabriel Fabien-Ouellet, doctoral student at Insitut National de la Recherche Scientifique, presents “Viscoelastic Full Waveform Inversion: Theory, Implementation and Application”. “Recently, the full waveform inversion community has shown a renewed interest in viscous attenuation. Indeed, viscous attenuation can have a strong impact on seismic wave propagation and is a property of interest in itself. Moreover,…

Brian Kennett, Emeritus Professor of Seismology at The Australian National University, presents “The Australian Lithosphere: Interactions of Multi-Scale Heterogeneity”.

The detection and characterization of domains of intersecting fractures are important goals in several disciplines of current interest, including exploration and production of unconventional reservoirs, nuclear waste storage, CO2 sequestration, and groundwater hydrology, among others. The objective of this study is to propose a theoretical framework for quantifying the effects of fracture intersections on the…