Seismicity in the Labrador-Baffin Seaway and surrounding onshore regions

Allison L. Bent, Peter Henrik Voss

Publikation: Bidrag til bog/rapport/konferenceproceedingsBogkapitelForskningpeer review

Abstrakt

Studying earthquakes in Baffin Bay and the surrounding regions is challenging. There is no knowledge of earthquake activity in this region prior to 1933 when a moment magnitude (MW) 7.4 earthquake occurred in Baffin Bay. With improved instrumentation, increased seismograph coverage in the north, and modern analysis techniques, knowledge and understanding of earthquakes in the Baffin region is improving. Active seismic zones include Baffin Bay, the east coast of Baffin Island, and the Labrador Sea, separated by areas of low seismicity. Focal-mechanism solutions show a mix of faulting styles, predominantly strike-slip and thrust. Regional stress-axes orientations show more consistency, which suggests that activity is occurring on previously existing structures in response to the current stress field. There is little correlation between earthquake epicentres in Baffin Bay and mapped structures. Glacial isostatic adjustment may be a triggering mechanism for earthquakes in the Baffin region, but modelling efforts have yielded equivocal results.
OriginalsprogEngelsk
TitelGeological synthesis of Baffin Island (Nunavut) and the Labrador-Baffin Seaway
RedaktørerL T Dafoe, N Bingham-Koslowski
ForlagNatural Resources Canada
Sider379
Antal sider387
Vol/bind608
DOI
StatusUdgivet - 2022

Publikationsserier

NavnGeological Survey of Canada, Bulletin

Programområde

  • Programområde 3: Energiressourcer

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