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Detailed Reference Information
Olsen et al. 1980
Olsen, K.H., Braile, L.W. and Johnson, P.A. (1980). Seismic velocity and Q-structure of the upper mantle lid and low velocity zone for the Eastern Great Basin. Geophysical Research Letters 7: doi: 10.1029/GL007i012p01029. issn: 0094-8276.

A 100-km-long record section of NTS explosions recorded in the eastern Snake River Plains (7 ¿<Δ<8 ¿) shows the cusp of critical refractions from the steepened P velocity gradient at the bottom of the upper mantle LVZ. Synthetic seismograms calculated with a modified reflectivity program have been used to derive a regional velocity model of the upper mantle beneath the eastern Great Basin. The model suggests that observed very weak Pn arrivals are due to a slight negative velocity gradient below the Moho and that no high velocity mantle lid exists in this region.

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Geophysical Research Letters
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American Geophysical Union
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