Attenuation of seismic waves in the Trinidad and Tobago area

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dc.contributor The University of the West Indies
dc.creator Latchman, Joan L. "et al."
dc.date 1993
dc.date.accessioned 2018-03-14T14:13:47Z
dc.date.available 2018-03-14T14:13:47Z
dc.identifier DOI: 10.1016/0040-1951(95)00050-X
dc.identifier.uri http://hdl.handle.net/2139/45475
dc.description The attenuation of seismic waves from earthquakes located within the area bounded by 9-12°N and 60-63°W was estimated from short-period seismograms. Coda- Q, Qc, determinations were made for each of the six seismograph stations within the area, while spectral Q values from P-phases, Qα, were estimated for station TRN. The S-S single-scattering model was assumed for coda generation, and the ω-2 source model was assumed for the spectral Q determinations. The Qc values show a strong frequency dependence in the frequency range 1.5-12 Hz. The value of Q at 1 Hz, Qo, was found to lie within the range 107-132, while the rate of frequency dependence, n, extends from 0.80 to 1.06 for shallow events. For intermediate-depth events, Qo varies from 101 to 173 and n from 0.80 to 1.02. The Qα values obtained show a spatial variation within the region, the highest attenuation was obtained on land Trinidad.
dc.publisher Elsevier Science B.V.
dc.source Tectonophysics, Volume 253, Issue 1, p. 111-127.
dc.subject Earthquakes
dc.subject Trinidad and Tobago
dc.subject Seismic waves
dc.subject Coda Q
dc.title Attenuation of seismic waves in the Trinidad and Tobago area


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