| Title | Seismicity in the Labrador-Baffin Seaway and surrounding onshore regions |
| Download | Downloads |
| Associated Data | https://doi.org/10.4095/330200 |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Bent, A L; Voss, P |
| Source | Geological synthesis of Baffin Island (Nunavut) and the Labrador-Baffin Seaway; by Dafoe, L T (ed.); Bingham-Koslowski, N (ed.); Geological Survey of Canada, Bulletin 608, 2022 p. 379-387, https://doi.org/10.4095/321857
 Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Geological synthesis of
Baffin Island (Nunavut) and the Labrador-Baffin Seaway |
| File format | pdf; html; xlsx |
| Province | Nunavut; Newfoundland and Labrador; Northern offshore region |
| NTS | 3; 14; 15; 16; 23I; 23O; 23P; 25A; 25G; 25H; 25I; 25J; 25K; 25L; 25M; 25N; 25O; 25P; 26; 27; 28; 29A; 29B; 29C; 29D; 35P; 36A; 36B; 36C; 36D; 36E; 36F; 36G; 36H; 36I; 36P; 37; 38; 39A; 39B; 39C; 39D; 47E;
47F; 47G; 47H; 48A; 48B; 48C; 48D; 48E; 57E; 57H; 58A; 58D |
| Area | Baffin Island; Baffin Bay; Bylot Island; Davis Strait; Labrador; Labrador Sea; Canada; Greenland; Denmark |
| Lat/Long WENS | -90.5000 -43.0000 78.0000 52.0000 |
| Subjects | geophysics; structural geology; tectonics; Science and Technology; Nature and Environment; Health and Safety; seismology; seismicity; seismic risk; earthquakes; earthquake risk; earthquake magnitudes;
bedrock geology; structural features; faults; faults, thrust; faults, strike-slip; faults, normal; stress orientation; epicentres; glacial history; isostasy; modelling; seismological network; seismographs; fault plane solutions; Canadian National
Earthquake Database; Canadian National Seismograph Network |
| Illustrations | location maps; geoscientific sketch maps; tables |
| Program | GEM2: Geo-mapping for Energy and Minerals Baffin Region Atlas |
| Released | 2022 08 15 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
This paper is part of a comprehensive volume on the Baffin region. It is focused on earthquakes. Topics covered include earthquake monitoring, regions
of high seismic activity in the Baffin-Labrador Seaway and focal mechanisms (style of faulting) for the largest earthquakes. Earthquakes as large as magnitude 7.4 have occurred in Baffin Bay. In much of this region there is not a clear correlation
between earthquake epicenters and mapped faults. Processes, such as glacial isostatic adjustment, which may play a role in the generation of earthquakes in this region are also discussed. |
| GEOSCAN ID | 321857 |
|
|