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Wednesday, February 17, 2010
8:00 pm
Beckman Auditorium – Beckman Auditorium

Ares Rosakis: Intersonic Earthquakes: What Laboratory Earthquakes Teach us About Real Ones

Presented By: Caltech Committee on Institute Programs

Directly studying earthquakes presents a host of insurmountable difficulties, the least of which is our inability to trigger earthquakes of various magnitudes at will and the lack of means of scrutinizing the behavior at depth while the quake propagates. We have developed techniques to produce miniature laboratory earthquakes and follow their progress with high-speed imaging tools. Our quakes mimic actual quakes, and have demonstrated the existence of "super-shear" or "intersonic" rupture speeds. The propagating fronts of such intersonic ruptures feature a Mach-cone of shear shock waves similar to that of supersonic aircraft. This unusual feature produces potentially catastrophic ground shaking signatures (equivalent to sonic booms) with unexpected implications to seismic hazard analysis.

Ares Rosakis is the Theodore von Kármán Professor of Aeronautics and Mechanical Engineering, and Chair of the Division of Engineering and Applied Science at Caltech.

Learn More: Ares Rosakis

Please Note: This event will be digitally recorded and made available for viewing on the Caltech Theater site. Many past Watson Lectures are available for viewing online on the Caltech Theater site, and are available for purchase: DVD Order Form (PDF)

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