Mohajer, A. A. (1993). Seismicity <strong>and</strong> seismotectonics <strong>of</strong> <strong>western</strong> Lake Ontarioregion. Geogr. Phys. Quat., 47, 353–362.Mohajer, A., Eyles, N., <strong>and</strong> Rogojina, C. (1992). Neotectonic faulting in metropolitanToronto: implications for earthquake hazard assessment in the Lake Ontario region.<strong>Geology</strong>, 20, 1002–1006.Mohajer, A. A. (1995a). Faults in the metropolitan Toronto area; active vs dormantfaults, in Program, List <strong>of</strong> participants <strong>and</strong> abstracts from the Atomic Energy ControlBoard Workshop <strong>of</strong> Seismic Hazard Assessment in Southern Ontario. Ottawa,Ontario, 19–21 June 1995, INFO-0604-1, C61–C74.Mohajer, A. A. (1995b). Local seismic monitoring east <strong>of</strong> Toronto, in Program, List<strong>of</strong> participants <strong>and</strong> abstracts from the Atomic Energy Control Board Workshop <strong>of</strong>Seismic Hazard Assessment in Southern Ontario. Ottawa, Ontario, June 1995, INFO-0604-1.Morgan, W. J. (1983). Hotspot tracks <strong>and</strong> the early rifting <strong>of</strong> the Atlantic.Tectonophysics, 94, 123-139.Natural Recourses Canada: http://www.earthquakescanada.nrcan.gc.ca/zones/eastcaneng.php#SGLSZNguyen, B. V., <strong>and</strong> Herrmann, R. B. (1992). Determination <strong>of</strong> source parameters forcenteral <strong>and</strong> eastern North America earthquakes (1982-1986). Seism. Res. Lett., 63.Nuttli, O.W. (1973) Seismic wave attenuation <strong>and</strong> magnitude relations for easternNorth America, J. Geophy. Res. 78, 876-885.Ontario Geological Survey. 1991. Bedrock geology <strong>of</strong> Ontario, <strong>southern</strong> sheet. On.Geo. Sur., Map 2544, scale 1: 1 000 000.Parsons, B., <strong>and</strong> Scalter, J. G. (1977). An analysis <strong>of</strong> the variation <strong>of</strong> ocean floorbathymetry <strong>and</strong> heat flow with age. J. Geoph. Res., 82, 803– 827.Pavlis, G. L. (1986). Appraising earthquake hypocenter location errors: a complete,practical approach for single-event locations. Bull. Seism. Soc. Am., 76, 1699- 1717.Quinn, A. W. (1993). Normal faults <strong>of</strong> the Lake Champlain region. J. Geol., 41, 11-143.Richardson, R. M. (1992). Ridge forces, absolute plate motions, <strong>and</strong> the intraplatestress field. J. Geoph. Re., 97.111
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FOCAL MECHANISMS AND VARIATIONS IN
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Acknowledgements:I would like to ex
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Figure 5.12: Summary of the focal m
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AbbreviationsCNSN: Canadian Nationa
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Earthquakes in western Quebec and s
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1.2 Organization of ThesisChapter 1
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eastern Canada each year, of which
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Metasedimentary Belt boundary tecto
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The Grenville Front tectonic zone (
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Figure 2.3: Seismicity in the study
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oadly similar continent-continent c
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Figure 2.4: Historical earthquakes
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earthquakes have occurred within th
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cluster, which is considered part o
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2001. All events seemed to occur in
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CHAPTER 3DATA SET AND METHODS3.1 In
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Fig. 3.1: Locations of seismic stat
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Figure 3.2: Number of stations used
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the strongest recorded event in the
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Figure 3.5: Earthquake source param
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The amplitudes of the seismic waves
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Figure 3.7: Vertical component wave
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HYPOCENTER programThe HYPOCENTER pr
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wave - e.g. Pg or Pn, Sg or Sn), th
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model for P-wave velocity with mult
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CHAPTER 4RESULTSIn this chapter the
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Figure 4.1: Distribution of RMS of
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Table 4.2: Earthquake parameters (h
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The focal depth calculated here is
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focal mechanism beach-ball diagrams
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some spatial variability of the ori
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22 20001006 50 ±3 134 ±10 90 ±0
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a)b)c)d)Western QuebecSouthern Onta
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19810707 -74.6 45.1 13.0 1.9 304.0
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19950603 -76.4 47.1 18.0 3.9 100.1
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20060225 -75.2 45.7 18.7 4.5 125.8
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