Monthly Luncheon With Guest Speaker Kristy Tiampo

07/12/2018 @ 11:30 am – 1:00 pm

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Date(s) - 07/12/2018
11:30 am - 1:00 pm

Wynkoop Brewery

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Please join us July 12, 2018

With Guest Speaker Kristy Tiampo

DInSAR analysis of infrastructure and induced seismicity

Location will be at Wynkoop Brewery at 1634 18th Street in Lower Downtown Denver

Differential interferometric synthetic aperture radar (DInSAR) can measure surface deformation at the centimeter level and, as a result, has been used to investigate a wide variety of natural and anthropogenic hazards since the early 1990s. In particular, DInSAR has been employed around the world to study ground surface changes from groundwater pumping, either injection or withdrawal.

Here we provide examples of DInSAR observations and models from both injection and withdrawal in both urban and rural settings, including Seattle, WA, Vancouver, BC, Timpson, TX, and Greeley, CO.  The model employed here is an elliptical modification of Geertsma’s (1973) numerical model of land subsidence above hydrocarbon-producing reservoirs.

In addition, to correlate surface deformation, induced seismicity, and oil and gas activity, we can compare the wastewater well and production well locations and injection and production rates and depths with the spatial and temporal signature of the surface deformation before and after induced earthquakes, filling in the spatiotemporal gap lacking from seismicity.

Here we demonstrate that even in those areas where the potential damage is minimal, knowledge of the relationship between pumping rates and the associated subsidence can provide important information on the subsurface structure as well as the potential hazard.

About The Speaker:

Dr. Kristy Tiampo received her BSc in Civil Engineering from Tufts University, USA, and her MSc in Civil Engineering from Stanford University, USA. She obtained her PhD in Geophysics from the University of Colorado at Boulder, USA, after practicing as a construction engineer for the US Army Corps of Engineers for almost 10 years, during which time she earned her certification as a Professional Engineer. In 2003 she was appointed Assistant Professor of Geophysics at Western University, Canada, and was the NSERC and Aon Benfield/ICLR Industrial Research Chair in Earthquake Hazard from 2006 through 2011.  Today she is Professor and Director of the Earth Science and Observation Center (ESOC) at the Cooperative Institute for Research in Environmental Sciences (CIRES) at the University of Colorado.  Dr. Tiampo’s research program aims to provide a comprehensive understanding of the processes which govern natural and anthropogenic hazards and, in particular, those which generate earthquakes, and thus improve the associated estimates of the regional seismic hazard.  This is accomplished through the integration of large quantities of remote sensing data such as space-based Global Positioning System (GPS) data, differential Interferometric Synthetic Aperture Radar (DInSAR), seismicity and gravity, in order to provide critical information on the nature and scale of these hazards. Her research program includes improvements into the nature and quantity of that data, innovative analysis techniques, accurate models of the potential geophysical sources, and timely and appropriate assimilation into various computational models.  Significant contributions from her research group include development of the first of a new generation of seismicity measures and effective inversions for the sources of surface deformation associated with earthquake and volcanic hazard as well as anthropogenic signals.




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