Earthquake Insights From the Best Recorded Volcanic Caldera Collapse In History

Two outstanding problems in seismology are predicting the recurrence times of earthquakes and understanding the physical processes that immediately precede them. While geodetic measurements record elastic strain accumulation, most faults have recurrence intervals far longer than available measurements. Foreshocks provide the principal observations of processes prior to mainshocks, yet variability between sequences has limited generalizations of pre-failure behavior. In 2018 Kilauea volcano...

Speaker:

Tim Lichtenberg, Assistant Professor
Kapteyn Astronomical Institute, University of Groningen

Talk Title:  Raising our expectations for DEI work in geoscience faculty evaluation systems: an insight into who sustains this work and how this labor is recognized and rewarded

Abstract: The geosciences have an ethical obligation to increase the low racial and...

Talk Title:  The Thermal Histories of Solar System Moons and Small Bodies

Abstract:  The heat flow of a planetary body plays a major role in defining its evolution and current composition, driving processes from internal differentiation during its formation period through geological activity at the current time. However, these same active processes erase many of the surface signatures that would allow us to reconstruct its long-term thermal history. In this talk, I will present novel observational approaches, using primarily the ALMA interferometer...

Talk Title: Water in Earth

Abstract: Water is essential for life as we know it and Earth is often referred to as a water world. But where Earth’s water comes from, how much was accreted, how much was retained in its deep interior, and how it has been recycled through deep time have proven exceptionally challenging questions that require a broad, multi-disciplinary perspective. In this talk I will provide an overview of recent work on these questions with a slant...

Overall, my research interests are in constraining the timescales and conditions of planetesimal formation and evolution via elemental, isotopic and petrographic analyses of meteorites.  About Myriam Telus

Alissar Yehya, Baha and Walid Bassatne Department of Chemical Engineering and Advanced Energy, AUB, Beirut, Lebanon; Associate, John A. Paulson School of Engineering and Applied Sciences, Harvard University 

Title: Influence of fluid-assisted healing on fault permeability structure

Abstract:
Micro-cracks in fault damage zones can heal through diffusive mass transfer controlled by temperature and pressure. The diffusion of pore fluid pressure in fault damage zones...

Magali Billen, UC Davis

Episodic Plate Motion and Thermal Structure in Subduction Zones Caused by Slab Folding in the Transition Zone

Abstract: Although most present-day subduction zones are in trench retreat, plate reconstructions and geological observations show that individual margins experience episodes of advancing, retreating or stationary trench motion with time-variable subduction rates. However, most laboratory and numerical simulations predict steady plate velocities and sustained trench retreat unless the slab experiences folding in the...