Tuesday, June 12, 2018 from 4:30-6pm in the Taos Room (ABQ Convention Center, Lower Level)
Eli Baker, Air Force Research Lab, Kirtland AFB
Brandon Schmandt, University of New Mexico
This SIG session is intended to explore the potential of greater community involvement through IRIS, perhaps through a community experiment, to address the problem of resolving changes over time in seismic velocity structure. The application of interest here is damage from underground explosions. Such an experiment would address the fundamental source physics problem of the relationship between explosions and damage, and how damage contributes to seismic wave generation in addition to direct seismic generation by the shock wave. Changes in multi-component ambient noise correlations before and after an explosion could resolve damage, which would complement back-projection or reverse-time migration done with a dense array to identify where specific phases are generated, so they could be associated with the damage. Important questions to consider include: What station density, proximity, and deployment length would be required? How do we relate seismic velocity changes to damage (e.g. material property measurements of cores)? How important would borehole stations be at and below explosion depth, for both damage resolution and back-projection to identify source locations? Input from researchers involved in monitoring changes due to waste water injection, hydraulic fracturing, geothermal extraction and injection, CO2 sequestration, natural groundwater withdrawal/recharge, and natural earthquakes is welcomed, and we would expect results from explosion monitoring projects to have relevance to these fields.