Electronic Supplement to
Coda Q in the Northern Cascadia Subduction Zone

by Amir Mansour Farahbod, Andrew J. Calvert, John F. Cassidy, and Camille Brillon

This electronic supplement contains a figure, showing principal tectonic units and station locations, and four tables of average Q0 and α values with estimated uncertainties. The main objective is providing additional information on estimated Q0 and α for solutions with an average lapse time of 18 s and the number of events as small as two. Estimated results for three closed stations in the study area from Zelt et al. (1999) are also provided.

Tables

Table S1. Average Q0 and estimated uncertainties for different sampling volumes (4 ≥ n ≥ 2).

Table S2. Average α values and estimated uncertainties and average Zmax for different sampling volumes (4 ≥ n ≥ 2).

Table S3. Average Q0 and estimated uncertainties for different sampling volumes corresponding to ellipse parameter a2 = 30 km and average lapse time of 18 s.

Table S4. Average Q0 and estimated uncertainties for different sampling volumes for stations that are shown in Figure S1.

Figure

Figure S1. Principal tectonic units in the northern Cascadia subduction zone and the location of one seismograph station (BBB) in the northern tip of the region and three closed stations (GOB, WKB, and WHB) within the study area in southwestern British Columbia.

Reference

Zelt, B. C., N. T. Dotzev, R. M. Ellis, and G. C. Rogers (1999). Coda Q in southwestern British Columbia, Canada, Bull. Seismol. Soc. Am. 89, no. 4, 1083–1093.

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