Lg Wave Excitation and Propagation in Presence of One-, Two-, and Three-Dimensional Heterogeneities.
Scientific rept. no. 2, 1 Oct 85-31 Mar 86,
SAINT LOUIS UNIV MO
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A detailed study of Lg wave excitation and propagation from a sequence of earthquakes in New Brunswick is performed. Primary conclusions are that Lg Q increases with frequency. Perhaps more importantly for regional source studies is the observation of significant high frequency Pn and Sn arrivals at 1000 km which are much greater than the Lg arrival. Source estimates based on the Lg provide reasonable estimates of seismic moment, but corner frequencies differ from short distance measurements. Keywords include Lg attenuation and source estimates.