Winter 2016

January 8, 2016

Speaker: Brenda Hall, University of Maine

Title: History of the Antarctic Ice Sheet during the Last Glaciation and Last Termination

January 15, 2016

Speaker: Sarah Minson, USGS

Title: Smartphone-based Earthquake Early Warning: Crowd-sourcing and low-cost networks

January 22, 2016

Speaker: Matt Tiscareno, SETI

Title: Dynamics of Saturn’s rings and moons

Three topics will be covered: The inference from a rotational “wobble” of Enceladus that that moon has a global ocean, a catalogue of moon-induced waves in Saturn’s rings, and the orbital evolution of “propeller” moons embedded in the rings.

January 29, 2016

Speaker: Eileen Evans, USGS

Title: Imaging active deformation in the western United States

February 5, 2016

Speaker: Dustin Schroeder, Stanford

Title: Radio Glaciology: A Window into the Physical Processes of Ice Sheets

Abstract: Radio echo sounding is a uniquely powerful geophysical technique for studying the interior of ice sheets, glaciers, and icy planetary bodies. It can provide broad coverage and deep penetration as well as interpretable ice thickness, basal topography, and englacial radio stratigraphy. However, despite the long tradition of glaciological interpretation of radar images, quantitative analyses of radar sounding data are rare and face several technical challenges. These include attenuation uncertainty from unknown ice temperature and chemistry, clutter and losses from surface and volume scattering, and a lack of problem-specific radar theory. However, there is rich, often underexploited, information in modern radar sounding data, which is being collected over terrestrial and planetary ice at an unprecedented rate.  The development and application of hypothesis-driven analysis approaches for these data can place observational constraints on the morphologic, hydrologic, geologic, mechanical, thermal, and oceanographic configurations of ice sheets and glaciers.  These boundary conditions – and the physical processes which they express and control – are filling a fundamental gap our ability to understand and predict the evolution, stability, and sea level contributions of marine ice sheets.

February 12, 2016

Speaker: Ilya Svetlizky, Hebrew University of Jerusalem

Title: Classical shear cracks drive the onset of dry frictional motion

February 19, 2016

Speaker: Marine Denolle, Harvard University

Title: Scaling of moderate to large subduction earthquakes

February 26, 2016

Speaker: Anthony Menicucci, UC Davis

Title: Biogenic Silica - Analytical Challenges and Chemical Investigations

March 4, 2016

Speaker: David Shelly, USGS

Title: Earthquake swarms in high definition: migrating seismicity and fluid-faulting interactions

March 11, 2016

Speaker: Shannon Curry, UC Berkeley

Title: Space weather at Mars: MAVEN observations and models of ICMEs