S017-06
Humming trains as an opportunistic source for imaging the shallow crust

Wednesday, 9 December 2020: 04:22
Virtual
Laura Pinzon Rincon1, François Lavoué2, Aurélien Mordret2, Pierre Boué3, Florent Brenguier3, Philippe Dales4, Yehuda Ben-Zion5, Frank Vernon6, Christopher J Bean7 and Dan Hollis8, (1)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (2)Univ. Grenoble Alpes, ISTerre - Sisprobe, Grenoble, France, (3)Univ. Grenoble Alpes, ISTerre, Grenoble, France, (4)University of Ottawa, Earth Sciences, Ottawa, ON, Canada, (5)University of Southern California, Department of Earth Sciences and Southern California Earthquake Center, Los Angeles, CA, United States, (6)University of California San Diego, La Jolla, CA, United States, (7)Dublin Institute for Advanced Studies, Dublin, Ireland, (8)Sisprobe, Grenoble, France
Recorded Presentation
Abstract:
Freight trains are one of the most powerful and persistent seismic sources of cultural noise. They generate tremors equivalent to earthquakes of magnitude 2 that can be detectable up to 100 km distance. Here, we propose to use the freight train passages as an opportunistic source of noise for passive seismic interferometry (SI). Usually, passive SI relies on blind correlations of long time series of noise for imaging and monitoring purposes. We suggest an alternative method based on noise source characterization, signal and station pairs selection, and specific seismic phases extraction (surface, body waves). To illustrate the potential of a freight train for imaging the shallow crust, we show a case study in a mineral exploration context in Canada, where we retrieve body waves to imaging the subsurface. This approach of noise recovery to create valuable sources could be applied for several sources of seismic noise and in different contexts improving spatial and temporal resolutions.
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