Lecture by Peter Brown will launch the new academic year

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Peter Jedicke
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Lecture by Peter Brown will launch the new academic year

Post by Peter Jedicke » August 25th, 2019, 9:44 pm

There will be a Physics & Astronomy Colloquium on Thursday, 2019-09-05, at 13:30 in the Physics & Astronomy Seminar Room 100
given by
Peter G. Brown
of the Department of Physics and Astronomy, Western University
with the title
"The airburst hazard from small asteroid impacts: What we have learned from Chelyabinsk"

On 2013-02-15 a 20m asteroid impacted just south of the city of Chelyabinsk, Russia, releasing half a megaton of energy. The damage caused by the impact (window breakage, light structural damage) was a surprise -- models of the time predicted that ground damage from impacts should only occur for much larger objects. In the half dozen years since Chelyabinsk, study of this unique airburst has led to improved models of impact effects from small NEOs and a re-assessment of the risk posed by small, decameter-sized impactors. In this talk Peter will summarize key lessons gleaned from the Chelyabinsk airburst and what we have learned about the small NEO population and the associated impact hazard at Earth.
Peter Jedicke
"The whole beauty of science, and particularly physics, is that it tells us something astonishing about reality, correcting our naïve intuitions about space and time and causality." (Rebecca Newberger Goldstein)

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