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TitlePhotographic record of the tsunami impacts on western Haida Gwaii following the Mw 7.8 Haida Gwaii earthquake on October 28, 2012
AuthorBednarski, J M; Leonard, L J
SourceGeological Survey of Canada, Open File 8044, 2016, 12 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatreadme
File formatpdf; html; dpf; shp; kml; rtf; jpg
ProvinceBritish Columbia; Western offshore region
NTS103B; 103C; 103F; 103G
AreaHaida Gwaii; Graham Island; Moresby Island
Lat/Long WENS-134.0000 -131.0000 54.2500 52.0000
Subjectssedimentology; geophysics; earthquakes; tsunami; mass wasting; landslides; subsidence; coastal studies; coastal erosion; coastal environment; shoreline changes; shorelines
Illustrationslocation maps; photographs; tables
ProgramWestern Canada Geohazards Project, Public Safety Geoscience
Released2016 06 21
Summary(Plain Language Summary, not published)
The Mw 7.8 Haida Gwaii earthquake on October 28th, 2012 (October 27th local time) was caused by northeast thrusting along a fault off the west coast of Moresby Island, British Columbia. This was the largest thrust earthquake and the second largest earthquake ever recorded in Canada. Given the extent of sea floor displacement, tsunami waves in excess of 3 m were expected along the coast of Haida Gwaii, but because the west coast of Haida Gwaii is largely unpopulated, there were no witnesses to the tsunami. The GSC undertook three coastal surveys in the weeks and months that following the earthquake and measured evidence of tsunami waves in excess of 3 m along ~230 km of coastline of Haida Gwaii. This report summarizes the field measurements and provides a photographic catalogue of the evidence surveyed.