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GeoRef Categories
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TOQUES: An Ocean‐Bottom Seismometer Dataset on the Central Queen Charlotte Fault, Southeast Alaska Available to Purchase
Serpentinization of the forearc mantle wedge in subduction zones: revisiting Roy D. Hyndman’s seminal contributions 25 years later Open Access
Seismicity at the intersection of the Coast Shear Zone and Anahim Volcanic Belt near Bella Coola, British Columbia, Canada Available to Purchase
Optimal Multichannel Stretch Factors for Estimating Changes in Seismic Velocity: Application to the 2012 M w 7.8 Haida Gwaii Earthquake Available to Purchase
Deep long-period earthquakes near Mount Meager, British Columbia Available to Purchase
Multichannel Deconvolution for Earthquake Apparent Source Time Functions Available to Purchase
Detection and Location of Low‐Frequency Earthquakes Using Cross‐Station Correlation Available to Purchase
High pore pressures and porosity at 35 km depth in the Cascadia subduction zone Available to Purchase
Seismic anisotropy associated with continental lithosphere accretion beneath the CANOE array, northwestern Canada Available to Purchase
Improved Green’s functions for passive-source structural studies Available to Purchase
Abstract Over the past two decades, teleseismic receiver functions have proved to be a useful tool to investigate crustal structure. Because they represent a first-order approximation to the S -wave component of the teleseismic- P Green’s function, receiver functions provide valuable information on physical properties related to shear modulus. However, the implicit use of the P -component seismogram as a proxy for the source precludes the recovery of information on discontinuous structure involving contrasts in compressional modulus. By deconvolving improved estimates of complex source time functions generated by earthquakes, one may move beyond the conventional receiver function paradigm to a more accurate approximation of the earth’s Green’s function. Using a new deconvolution method, we present estimates of the P -component of the teleseismic- P Green’s functions at several stations of the Canadian National Seismic Network (CNSN) that clearly show the receiver-side pure P -wave crustal multiple. The identification and characterization of these signals in studies of the lithosphere will afford better constraints on subsurface lithology and represent a narrowing of the gap between active- and passive-source seismic imaging.