Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by WOODGOLD, C. R. D. Search for Related Content GeoRef GeoRef Citation

Estimation of Q in eastern Canada using coda waves

GEOLOGICAL SURVEY OF CANADA GEOPHYSICS DIVISION, 1 OBSERVATORY CRESCENT, OTTAWA, ONTARIO K1A 0Y3, Canada

Abstract

The determination of Q₀ and (where Q = Q₀f) from seismic coda over the United States by Singh and Herrmann (1983) has been extended to cover a large area of southeastern Canada (south of 50°N, east of 80°W). The model used assumes, like that of Singh and Herrmann (1983), that the coda is generated by isotropic single scattering of surface waves, but also takes into account nonzero source-receiver distances. An average value of 0.43 is found for for the whole region. Assuming this value of , and using data in the 1 to 10 Hz range, Q₀ has been estimated independently in nine different subregions, so that the variation of Q₀ within the area of study can be seen. Q₀ varies from 480 in New Brunswick to 770 near Ottawa. Q₀ is also high (760) in the Adirondack Mountains and near Val-d'Or, Quebec (730), but lower along the St. Lawrence River (620). The results agree well with those of other studies in which Q for the same geographical regions is determined by other methods.

Above 10 Hz and below 1 Hz, Q is more strongly dependent on frequency than in the 1 to 10 Hz range. The same result has been obtained by Shin and Herrmann (1987) by a different method.

This article has been cited by other articles:

				A. L. Jemberie and A. A. Nyblade Intrinsic and Scattering Q near 1 Hz across the East African Plateau Bulletin of the Seismological Society of America, December 1, 2009; 99(6): 3516 - 3524. [Abstract] [Full Text] [PDF]

				B. Sharma, A. K. Gupta, D. K. Devi, D. Kumar, S. S. Teotia, and B. K. Rastogi Attenuation of High-Frequency Seismic Waves in Kachchh Region, Gujarat, India Bulletin of the Seismological Society of America, October 1, 2008; 98(5): 2325 - 2340. [Abstract] [Full Text] [PDF]

				M. Lamontagne, A. L. Bent, C. R. D. Woodgold, S. Ma, and V. Peci The 16 March 1999 mN 5.1 Cote-Nord Earthquake: The Largest Earthquake Ever Recorded in the Lower St. Lawrence Seismic Zone, Canada Seismological Research Letters, March 1, 2004; 75(2): 299 - 316. [Abstract] [Full Text] [PDF]

				B. C. Zelt, N. T. Dotzev, R. M. Ellis, and G. C. Rogers Coda Q in southwestern British Columbia, Canada Bulletin of the Seismological Society of America, August 1, 1999; 89(4): 1083 - 1093. [Abstract] [PDF]

				R. A. W. Haddon Modeling of source rupture characteristics for the Saguenay earthquake of November 1988 Bulletin of the Seismological Society of America, April 1, 1995; 85(2): 525 - 551. [Abstract] [PDF]

				G. M. ATKINSON and R. F. MEREU The shape of ground motion attenuation curves in southeastern Canada Bulletin of the Seismological Society of America, October 1, 1992; 82(5): 2014 - 2031. [Abstract] [PDF]

				D. M. BOORE and G. M. ATKINSON Source spectra for the 1988 Saguenay, Quebec, earthquakes Bulletin of the Seismological Society of America, April 1, 1992; 82(2): 683 - 719. [Abstract] [PDF]