Concrete dams as seismic imaging sources

Details Concrete dams as seismic imaging sources Concrete dams as seismic imaging sources

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3420307o&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 20, CiteID L20307

Physics

1

Seismology: Continental Crust (1219), Seismology: Body Waves, Seismology: Surface Waves And Free Oscillations, Seismology: Earthquake Ground Motions And Engineering Seismology, Seismology: Tomography (6982, 8180)

Scientific paper

We obtained noise correlation functions (NCF) in northern Montana from broadband data that include P- and S-wave first arrivals and short-period surface waves for frequencies extending to nearly 15 Hz at offsets of 5-17 km using ambient resonant vibrations of a concrete gravity-arch dam as seismic source. A seismograph operated close to the dam acted as a virtual source with a compact autocorrelation function, making it feasible to use short-duration cross-correlation time windows to obtain a larger number of NCF stacks with impulsive high-frequency body wave first-arrivals from recording durations of a single day to several weeks.

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