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Importance of on scale observations of first arriving Rayleigh wave trains for source studies: Example of the Chilean Event of March 3, 1985, Observed on the Geoscope and Ida Networks
Author(s) -
Monfret Tony,
Romanowicz Barbara
Publication year - 1986
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl013i010p01015
Subject(s) - rayleigh wave , amplitude , geology , seismology , geodesy , aftershock , rayleigh scattering , surface wave , moment (physics) , inversion (geology) , event (particle physics) , train , physics , optics , cartography , geography , classical mechanics , tectonics , quantum mechanics
A comparative moment tensor inversion study of the Chilean event of March 3, 1985 is performed using very long period Rayleigh wave data from the IDA and GEOSCOPE networks. It is shown that the perturbing effects of lateral heterogeneity on the propagation of the Rayleigh waves, especially in the amplitudes, can be minimized if first arriving trains R 1 and R 2 only can be used. More stable estimates of the main source parameters can then be obtained as well as an estimate of source directivity compatible with the aftershock distribution and body wave results.