Palo Alto Colloquia

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Next Colloquia

September 18, 2014       

PREDICTING STRONG EARTHQUAKE SHAKING USING OCEAN WAVES
Dr. Gregory C. Beroza, Geophysics Department, Stanford University

Predicting strong ground motion, as the strong shaking in earthquakes is called, from future earthquakes is among the most important research topics in seismology. Typically, seismologists do this through ground motion prediction equations that express relationships between earthquake characteristics and ground motion intensity. There is relatively little data to constrain these relationships, and in particular, there are few records of ground motion close to large earthquakes. As a result, seismologists are increasingly turning to simulations to compensate for this lack of data. Validating the accuracy of these simulations is critically important. In this talk I present a new approach for strong ground motion prediction. It relies on data that is one million times weaker in amplitude than the earthquake shaking of interest. The method uses the ambient seismic field, which is primarily generated by coupling of wave motion in the fluid ocean to wave motion in the solid Earth, to construct “virtual earthquakes” that can be used to predict long-period strong ground motion for scenario earthquakes.

Dr. Gregory C. Beroza is a faculty member in the Geophysics Department, and is the Wayne Loel Professor of Earth Sciences at Stanford University. He holds a BS degree from UC Santa Cruz and a Ph.D. degree from MIT. He has been Deputy Director, in charge of science planning, for the Southern California Earthquake Center since 2007. His research focus is earthquake seismology, and in particular how to understand the physics of earthquakes from seismograms, and how to anticipate the strength and variability of shaking in earthquakes. He is a fellow of the American Geophysical Union and recipient of the EGU Gutenberg Medal in recognition of outstanding contributions in seismology.

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Future Colloquia

The following schedule is tentative:

September 18
Dr. Gregory C. Beroza, Geophysics Department, Stanford University:  PREDICTING STRONG EARTHQUAKE SHAKING USING OCEAN WAVES

Septemper 25
Dr. Adam Brandt, Department of Energy Resources Engineering, Stanford University:  METHANE EMISSIONS FROM NORTH AMERICAN NATURAL GAS SYSTEMS: THE STATE OF THE SCIENCE

October 2
Dr. Mykel Kochenderfer, Stanford:  Next-Generation Aircraft Collision Avoidance

October 9
Dr. Mike Irwin, Director of the Cambridge Astronomical Survey Unit:  Survey data reduction

October 16
Dr. Katharine Mach, co-director of science for IPCC WGII. CLIMATE CHANGE IMPACTS, ADAPTATION, AND VULNERABILITY: THE NEW INTERNATIONAL ASSESSMENT

October 23
Dr. Fu-Kuo Chang, Stanford University:  Structural Health Monitoring

October 30
Mr. Greg Edwards. Internet Design Decisions and Later Regrets

November 6
Mr. Ken Lum:  The Evolution of the Reflector Telescope

November 13
Ms. Jennifer Gerlach, Valley Christian Schools: Developing a scientific mindset through research in the high school

November 20
Mr. Greg Edwards. Privacy and big data

November 27
NO COLLOQUIUM, Thanksgiving

December 4
Dr. Gary Bush, LM/STAR Labs:  The Latest on High Speed Rail (Again!!)

December 11
NO COLLOQUIUM

December 18
NO COLLOQUIUM

December 25
NO COLLOQUIUM, Christmas


If you have any comments or suggestions for speakers, please call Dr. Gary Bush at (650) 424-2267 or Dr. Stuart McHugh at (650) 424-2561.

To sign up for our mailing list, contact stuart.mchugh@lmco.com

Colloquia presentations via Microsoft Lync

All Colloquium talks begin at 4:15 pm

Audio: AT&T Conference call:
408-742-3800, Pin 729281#

For further information contact:
Dr. Gary Bush
650-424-2267
gary.bush@lmco.com
or
Dr. Stuart McHugh
650-424-2561
stuart.mchugh@lmco.com