Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 182, Issue 1, Pages 368-374Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1365-246X.2010.04617.x
Keywords
Image processing; Interface waves; Site effects; Wave scattering and diffraction; Crustal structure
Categories
Funding
- National Science Foundation (NSF) [EAR-0350030, EAR-0552316, EAR-0454554, EAR-0454524, EAR-0454535]
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P>Broad-band array studies frequently stack receiver functions to improve their signal-to-noise ratio while mapping structures in the crust and upper mantle. Noise may produce spurious secondary arrivals that obscure or mimic arrivals produced by P-to-S conversions at large contrasts in seismic impedance such as the Moho. We use a Hilbert transform to calculate phase-weights, which minimize the constructive stacking of erroneous signal in receiver function data sets. We outline this approach and demonstrate its application through synthetic data combined with different types of noise, a previously published example of signal-generated noise, and a large data set from the Sierra Nevada EarthScope Project. These examples show that phase-weighting reduces the presence of signal-generated noise in receiver functions and improves stacked data sets.
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