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UTIG Seminar Series: Alice-Agnes Gabriel, LMU Munich

October, 19 2018

Time: 10:30 AM - 11:30 AM
Location: PRC ROC Room 1.603


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Title: Dynamic viability of the 2016 Mw 7.8 Kaik?ura earthquake cascade on weak crustal faults

Abstract: The Mw 7.8 Kaik?ura earthquake struck New Zealand’s South Island on November 14, 2016. This event, considered the most complex rupture observed to date, caused surface rupture of at least 21 segments of the Marlborough fault system, some of them previously unknown. Puzzling features inferred from high-quality observations include a large gap separating surface rupture traces, the possibility of significant slip on the subduction interface, and slow apparent rupture speed. Here I present a dynamic rupture model to unravel the event’s riddles in a physics-based manner. The model reproduces key characteristics of the event and provides insights on the mechanical viability of competing hypotheses proposed to explain them. I show that the observed rupture cascade, involving strike and thrust faulting, is dynamically consistent with regional stress estimates and a crustal fault network geometry inferred from seismic and geodetic data. The rupture propagation requires a linking low-dipping shallow thrust fault, but not slip on an underlying megathrust. The complex fault system operates at low apparent friction thanks to the combined effects of over pressurized fluids, low dynamic friction and stress concentrations induced by deep fault creep. Our results associate the non-rupture of the Hope fault, one of the fundamental riddles of the event, with unfavourable dynamic stresses on the restraining step-over formed by the Conway-Charwell and Hope faults.

Learn more about Alice-Agnes Gabriel.

Host: Thorsten Becker

De Ford Lecture Series: Douglas Edmonds

October, 25 2018

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324

UTIG Seminar Series: Michael Tetley, Lyon

October, 26 2018

Time: 10:30 AM - 11:30 AM
Location: PRC ROC Room 1.603

Speaker bio.

Host: Thorsten Becker

Hot Science - Cool Talk \"Fire Ants, Crazy Ants & Zombie Ants\"

October, 26 2018

Time: 7:00 PM - 8:15 PM
Location: Student Activity Center (SAC), UT Campus

The red imported fire ant is an invasive species in Texas that can produce life-threatening allergic reactions in people, has major costs to agriculture, and causes severe impacts to native fauna. Dr. Rob Plowes shares insights into fire ant behavior and discusses a remarkable biological control opportunity. Dr. Plowes researches one of the fire ant\'s deadliest enemies - tiny phorid flies, which actually turn ants into zombie-like living incubators for their offspring! He also describes research approaches to other invasive species in Texas. We invite you to join us for a special Halloween celebration. Participate in our costume contest: come as your favorite creature or zombie!

De Ford Lecture Series: Kate Maher

November, 01 2018

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324

UTIG Seminar Series: Rosaly Lopes, Jet Propulsion Laboratory

November, 02 2018

Time: 10:30 AM - 11:30 AM
Location: PRC ROC Room 1.603

Speaker bio.

Title: Global Geology of Titan from Cassini

Abstract: Titan has shown itself to be one of the solar system\'s most intriguing objects for study, with a variety of unusual candidate materials on its surface, such as seas of liquid hydrocarbons. Titan is very geologically complex, and features found from Cassini data include large craters, cryovolcanoes, mountains, flowing channels, vast fields of dunes, and rivers, lakes and seas of methane. Titan is very Earth-like in its geology, despite the very different surface conditions and composition, and has become known as \"the Earth of the outer solar system\". This talk will discuss the global distribution and origin of different surface units.

Host: Cyril Grima

Alumni Reception during GSA in Indianapolis

November, 05 2018

Time: 6:00 PM - 8:00 PM
Location: Ram Restaurant and Brewery, 140 South Illinois Street in Indianapolis

UTIG Seminar Series: Amy Clement, University of Miami

November, 09 2018

Time: 10:30 AM - 11:30 AM
Location: PRC ROC Room 1.603

Speaker bio.

Host: Pedro DiNezio

De Ford Lecture Series: Richard Fiorella

November, 15 2018

Time: 4:00 PM - 5:00 PM
Location: JGB 2.324

UTIG Seminar Series: Krista Soderlund, UTIG

November, 16 2018

Time: 10:30 AM - 11:30 AM
Location: PRC ROC Room 1.603

Speaker bio.

Host: Ginny Catania