The 1956 June 03 Arctic margin earthquake off Borden Island, Northwest Territories

Adams, J; Penney, Heather D.

doi:10.4095/184200

Cited by 1 publication

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“…The three Arctic Ocean earthquakes also have primarily strike-slip mechanisms, and although two have low (D) quality rankings, all are very similar to each other, with one northeast-and one northweststriking plane. The solutions for these events are also similar to a poorly constrained mechanism for a larger (mb 5.7) earthquake that occurred in the same region in 1956 (Adams and Penney, 1993). The two that are closest together geographically (001003 and 001113b) have almost identical mechanisms.…”

Section: Western High Arcticmentioning

confidence: 50%

Focal Mechanisms for Eastern Canadian Earthquakes, 1994-2000

Bent

Drysdale

Perry

2003

Seismological Research Letters

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First motions from sixty earthquakes, mostly of magnitude 4.0 or greater, occurring in eastern Canada from 1994 through the end of 2000 were analyzed in an effort to determine their focal mechanisms. Focal mechanism solutions were obtained for thirty-seven. The seismograph station distribution in Canada is not uniform, and the percentage of events for which focal mechanisms could be determined is directly related to station density and azimuthal coverage. Well constrained solutions could almost always be determined for earthquakes occurring in the populated regions of southeastern Canada, where the network density is relatively high. We had moderate success in regions, such as the central Arctic and Labrador Sea, where station density is low but azimuthal coverage is adequate to good. Few focal mechanisms could be determined for the extreme northeast and southeast offshore regions, where both density and azimuthal coverage are poor. In this paper we summarize the focal mechanism solutions determined, provide quality ratings for each, and try to place these earthquakes in a regional context.

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Section: Western High Arcticmentioning

confidence: 50%