| Title | Photographic record of the tsunami impacts on western Haida Gwaii following the Mw 7.8 Haida Gwaii earthquake on October 28, 2012 |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Bednarski, J M; Leonard, L J |
| Source | Geological Survey of Canada, Open File 8044, 2016, 12 pages, https://doi.org/10.4095/298808  Open Access |
| Year | 2016 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | readme
|
| File format | pdf; html; dpf; shp; kml; rtf; jpg |
| Province | British Columbia; Western offshore region |
| NTS | 103B; 103C; 103F; 103G |
| Area | Haida Gwaii; Graham Island; Moresby Island |
| Lat/Long WENS | -134.0000 -131.0000 54.2500 52.0000 |
| Subjects | sedimentology; geophysics; earthquakes; tsunami; mass wasting; landslides; subsidence; coastal studies; coastal erosion; coastal environment; shoreline changes; shorelines |
| Illustrations | location maps; photographs; tables |
| Program | Public Safety Geoscience Western Canada Geohazards Project |
| Released | 2016 06 21 |
| Abstract | The Mw 7.8 Haida Gwaii earthquake on October 28th, 2012 (October 27th local time) was caused by northeast thrusting of the Pacific plate beneath Haida Gwaii, 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 followed the earthquake and measured evidence of tsunami waves in excess of 3
m, and largely exceeding 5 m in some inlets and bays, along ~230 km of coastline of Haida Gwaii. This report summarizes the field measurements and provides a photographic catalogue of the evidence surveyed. |
| 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. |
| GEOSCAN ID | 298808 |
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