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Published August 1970 | Published
Journal Article Open

Fast evaluation of source parameters from isolated surface-wave signals. Part I. Universal tables


Tables for spectral displacements of seismic surface waves from shear dislocations in flat multilayered earth models were prepared. Earth response functions for seven modes (R_(11), R_(21), R_(12), L_0, L_1, L_2, L_3) at six periods (300 sec, 250 sec, 200 sec, 150 sec, 100 sec, 50 sec) and three paths (continental, oceanic, shield) were calculated for the source-depth range of 10 to 600 km at intervals of 5 km until 200 km, and thereafter at intervals of 10 km. Ground motion is given in micron-seconds for the three fundamental shear dislocations, each of strength U_0dS = 10^3 (m × km^2) and a delta-function time-dependence. The tables provide the means for rapid evaluation of source parameters from spectral radiation patterns of amplitudes and initial phases.

Additional Information

© 1970 Seismological Society of America. Manuscript received February 11 1970. This research has been sponsored by the Air-Force Cambridge Research Laboratories under Contract AF61(052)-954 through the European Office of Aerospace Research, OAR, USAF, as part of the Advanced Research Projects Agency's Project VELA UNIFORM.

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August 19, 2023
October 24, 2023