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SUMMARY:'When the Monsoon rocks the Himalaya - Jean-Philippe Avouac - BP F
 oundation McKenzie Professor of Earth Sciences
DTSTART:20141127T170000Z
DTEND:20141127T180000Z
UID:TALK56103@talks.cam.ac.uk
CONTACT:Andy Buckley
DESCRIPTION:The Himalaya is an exceptional example of an active mountain r
 ange where the processes which have shaped the range over tens of millions
  of years can be observed at work.  In this presentation\, I will give an 
 overview of what we have learned from using a variety of different techniq
 ues to investigate its structure and current activity. I’ll describe how
  the various observations and data (seismicity\, geodesy\, morphotectonics
 ) can be reconciled from a simple model which involves recurring large ear
 thquakes\, aseismic deformation and some coupling between crustal deformat
 ion and erosion.   A most intriguing observation is that strain and seismi
 c activity in the Himalaya vary seasonally:  as the Himalaya rises in resp
 onse to the huge forces generated by Earth internal dynamics\, it also sho
 ws a surprising sensitivity to very small climate-driven stress changes. I
  will discuss what can be learned from these observations about earthquake
  processes and how our understanding of earthquake physics\, combined with
  improved numerical simulation\, can help evaluate the probability and cha
 racteristics of future large earthquakes. I'll single out some outstanding
  questions that I am planning to address in the future to make progress on
  this issue: why is it that some faults 'stick' and accumulate elastic str
 ain to be released in future earthquakes whilst some others creep quietly?
  How is seismicity hazard modified when fluids are injected in the crust (
 relevant to CO2 storage\, geothermal energy\, fracking)?
LOCATION:Physiology Lecture Theatre\, access from Department of Earth Scie
 nces\, Downing Street
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