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Interpretation of Sa on a continental structure
Article first published online: 2 APR 2007
DOI: 10.1111/j.1365-246X.1976.tb01270.x
Issue
1365-246X/asset/cover.gif?v=1&s=0b6c9ec5b881e6774f4a3cac6cee4be683535a1c "Geophysical Journal of the Royal Astronomical Society")
Geophysical Journal of the Royal Astronomical Society
Volume 47, Issue 1, pages 211–223, October 1976
Additional Information
How to Cite
Nakanishi, K. K., Schwab, F. and Kausel, E. G. (1976), Interpretation of Sa on a continental structure. Geophysical Journal of the Royal Astronomical Society, 47: 211–223. doi: 10.1111/j.1365-246X.1976.tb01270.x
Publication History
- Issue published online: 6 MAY 2009
- Article first published online: 2 APR 2007
- Received 1975 December 23
- Abstract
- References
- Cited By
Summary
Earlier work on the interpretation of Sa for continental structures is completed by including theoretical seismograms in the interpretation, along with multimode Love wave dispersion, attenuation and source excitation. Further, it is demonstrated that Sa is not a low-velocity zone channel wave by generating theoretical seismograms, which include this phase, with a structure containing no low-velocity zone. Sa is a seismic phase which seems to be influenced primarily by the abrupt velocity increase at a depth in the 400–450-km region. This interpretation is evaluated by computing eigenfunctions, group velocities, and source excitations for a model with a single layer over a high velocity region; the results compare favourably with those for the realistic model of the Earth.