November
2006 BAGS Meeting:
Geoengineering
activities, elasto-static response of the continental crust, and
interpretation of its complexity
Christian Klose
Lamont-Doherty Earth
Observatory
Thursday November 30, 2006
Please join us
for lunch in the Chevron cafeteria. Remember
to request a visitors badge!
Abstract:
The talk presents modeling and simulation results that indicate a
significant correlative between seismicity and lithostatic stress
alterations in the continental crust, due to geoengineering activities,
such as, coal mining. Triggering of seismicity depends on pre-existing
tectonophysical conditions (e.g., high compressive stress regimes)
rather than the impact of human actions. An example of this phenomenon
is the 1989 M5.6 earthquake; an event that was triggered after 200
years coal mining in New South Wales (Australia). On the other hand,
triggered seismicity gives engineers and scientists the unique
opportunity to examine the interior of the earth’s crust through
tomographic imaging based on passive seismic monitoring. The geologic
interpretation of these tomographic images is often a multi-dimensional
complex problem that can be solved by expert system applications based
on artificial intelligence.
Biography:
Christian Klose is currently a
post-doctoral scholar at Lamont-Doherty Earth Observatory. His work
involves understanding the driving forces of earthquake triggering,
when large volumes of fluids are extracted or injected deep
underground. He has developed a numerical algorithm to estimate
stress changes in the interior of the crust in space and over time due
to mass and volume changes within the sub/surface. Further, his
technique can determine the stability of pre-existing faults in the
vicinity of the operation sites, due to those induced stresses.
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