Analysis of the effects of Eurasian crustal and upper mantle structure on regional phases using broadband seismic data

Details Analysis of the effects of Eurasian crustal and upper mantle structure on regional phases using broadband seismic data Analysis of the effects of Eurasian crustal and upper mantle structure on regional phases using broadband seismic data

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aeec.book.....s&link_type=abstract

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Asia, Broadband, Earth Crust, Earth Mantle, Europe, Seismic Waves, Seismology, Wave Propagation, Discriminant Analysis (Statistics), Earth Planetary Structure, Waveforms

Scientific paper

This study represents the results of the first phase of a two year investigation of the effects of upper mantle structure on the propagation of regional phases. The first year of effort has been directed at improving the understanding of the PP phase observed at upper mantle distances, and developing a methodology by which this phase can be used to map out large-scale variations in uppermost mantle velocity gradients and absolute velocity levels. There was quite a success in quantifying the complex wavefield associated with PP, and a preliminary application of PP waveform analysis across the North American continent, where there is lots of independent knowledge of the structure with which to assess the resulting models, is presented. The next effort will be directed at application of the new methodology to mapping lid structure variations in Eurasia, combined with assessment of how these lid variations influence regional phase propagation and the behavior of various discriminant procedures such as Pn/Lg spectral behavior.

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