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TitleInitial results from the ULINNIQ seismicity and tsunami hazard project, northeastern Baffin Island, Nunavut
AuthorGosse, J C; Tremblay, TORCID logo; Broom, L A; Campbell, D CORCID logo; Wenzell, G; Nedimovic, M R; Forget Brière, L
SourceCanada-Nunavut Geoscience Office, Summary of Activities 2019, 2020 p. 101-123 Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20190498
PublisherCanada-Nunavut Geoscience Office
Mediaon-line; digital
File formatpdf
ProvinceNunavut; Northern offshore region
NTS27C; 27D; 27E; 27F; 27G; 37D; 37E; 37G; 37H; 38A; 38B
AreaBaffin Island; Kangiqtugaapik; Clyde River; Mittimatilik; Pond Inlet; Tasiujaq; Eclipse Sound
Lat/Long WENS -80.0000 -66.0000 73.0000 69.0000
Subjectssurficial geology/geomorphology; marine geology; environmental geology; geophysics; Nature and Environment; Science and Technology; Health and Safety; earthquakes; earthquake risk; earthquake magnitudes; earthquake damage; seismology; seismicity; seismic risk; landslides; mass wasting; slope failures; tsunami; marine sediments; landslide deposits; permafrost; ground ice; climate effects; climate, arctic; sediment stability; slope stability analyses; bedrock geology; structural features; faults; seismological network; in-field instrumentation; remote sensing; satellite imagery; field work; glaciers; sediment transport; geophysical surveys; acoustic surveys, marine; bathymetry; marine sediment cores; Holocene; Marine Environmental Observation, Prediction, and Response Network (MEOPAR); Arctic ULINNIQ Project; Climate change; cumulative effects; Communities; Infrastructures; Indigenous peoples; Indigenous languages; Inuit; colluvial and mass-wasting deposits; permafrost thaw; Collaborative research; Digital elevation data; Phanerozoic; Cenozoic; Quaternary
Illustrationscartoons; location maps; geoscientific sketch maps; photographs; tables; time series; geophysical profiles; satellite images
ProgramCanada-Nunavut Geoscience Office, Funding Program
Released2020 03 01
AbstractNortheastern Baffin Island, between the hamlets of Clyde River (Kangiqtugaapik) and Pond Inlet (Mittimatilik) is vulnerable to coastal and inland seismogenic and climatogenic geohazards. Communities and infrastructure within this high seismicity region are situated mostly within 60m above sea level, and geohazards, such as landsliding, displacement waves and earthquakes, have all been observed or felt this past half century. Prehistoric and recent hazard records are used to establish the magnitude, cause and nature of the regional seismicity, and the frequency and probability of future earthquakes, large landslides and tsunamis. In this paper, analyses of marine-sediment records from Pond Inlet and Tasiujaq (formerly Eclipse Sound), the first results of a survey of regional terrestrial rock avalanches and related oral-history accounts - based on interviews of citizens of Clyde River - are presented. These initial results indicate that the greatest number of observed onshore landslides and hazardous processes occur within a seismically active region between the hamlets of Pond Inlet and Clyde River. Offshore, evidence of significant Holocene mass wasting has been observed in the marine-sediment record of Pond Inlet and Tasiujaq. Although the lack of evidence outside the zone of high seismicity does not preclude other triggering mechanisms, a causal relationship between past hazardous processes and seismicity may exist. As permafrost thawing continues, it is possible that frequency of landslides and displacement waves may increase to levels analogous to those in aseismic Arctic regions with lithologies and fiord relief similar to those of western Norway.
Summary(Plain Language Summary, not published)
Northeastern Baffin Island between Clyde River and Pond Inlet is vulnerable to coastal and inland earthquake-related and climate change-related geohazards. The region includes a zone of high earthquakes occurence, and landsliding and high waves have been observed this half century. The Underwater Listening Network for Novel Investigations of Quakes (ULINNIQ) project is assessing the record of the magnitude, cause, and nature of the earthquakes, and the frequency and probability of future earthquakes and tsunamis. Here we provide intial results of marine sediment records in Pond Inlet and Eclipse Sound, a survey of terrestrial rock avalanches in the region, and oral histories based on interviews of citizens of Clyde River.

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