Portrait of an Earthquake: Geodetic Perspectives on the Physics of Faulting in the Himalaya

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Event Details
  • Date/Time:
    • Thursday February 21, 2019
      11:00 am - 11:50 am
  • Location: Ford Environmental, Science & Technology (ES&T) Building, Rm. L1205, 11am
  • Phone:
  • URL:
  • Email:
  • Fee(s):
    Free
  • Extras:
Contact

Andrew Newman

Summaries

Summary Sentence: A seminar by Dr. Eric O. Lindsey, School of Earth and Atmospheric Sciences

Full Summary: No summary paragraph submitted.

Media
  • Eric Lindsey Eric Lindsey
    (image/jpeg)

A School of Earth and Atmospheric Sciences Presents Dr. Eric O. Lindsey, Nanyang Technical University

Portrait of an Earthquake: Geodetic Perspectives on the Physics of Faulting in the Himalaya

Plate-boundary faults are massive, complex structures that display a wide range of seismic and aseismic behavior, and understanding the physics that govern their activity requires a highly multidisciplinary approach. 
 
In this talk, I will use a combination of geodetic, geologic, and numerical results to show how the 3D structure of the Main Himalayan thrust controls its frictional behavior, and offer a new perspective on the interplay between earthquakes and long-term fault evolution.

Following the 2015 Nepal earthquake, I provided the first high-resolution, wide-swath synthetic aperture radar image of the resulting ground deformation to the geophysics community. These data reveal clearly where the fault slipped, and by integrating them with 3D structural models, we show that the earthquake was bounded on all sides by sharp bends or ramps along the fault.

Combining these results with long-term GPS observations of ground motion, I demonstrate how the fault structure controls both the long- and short-term behavior of the megathrust throughout the Himalaya, and in turn, how fault friction interacts to control the fault structure over time.

In the future, developing a better understanding of the interaction between the structure and behavior of faults will require input from a diverse set of geophysical techniques and disciplines. 
 
In addition to mapping ground deformation at high precision with synthetic aperture radar, I will show some promising new ground-based geodetic methods and physics-based numerical tools I have pioneered. Together with seismic and geologic observations, they will enable us to paint a more complete picture of how earthquakes interact with and control the faults they occur on.

Additional Information

In Campus Calendar
Yes
Groups

EAS

Invited Audience
Faculty/Staff, Postdoc, Graduate students, Undergraduate students
Categories
Seminar/Lecture/Colloquium
Keywords
EAS Seminar
Status
  • Created By: nlawson3
  • Workflow Status: Published
  • Created On: Dec 13, 2018 - 2:34pm
  • Last Updated: Feb 13, 2019 - 10:23am