The 1949 Queen Charlotte Islands earthquake struck Haida Gwaii (at the time known as the Queen Charlotte Islands) and the Pacific Northwest coast at 8:01 p.m. PDT on August 21. The earthquake had a moment magnitude of 8.0[4] and a surface wave magnitude of 8.1. The maximum Mercalli Intensity in the event was VIII (Severe).
The interplate earthquake began in the ocean bottom just off the rugged coast of Graham Island. It ruptured along the Queen Charlotte Fault both northward and southward more than 500 km (311 mi). Shaking was felt throughout British Columbia, parts of Washington, Oregon, Alberta, the Yukon, and Alaska.[5] No deaths were reported in this earthquake.
^"M 8.0 - 171 km S of Hydaburg, Alaska". earthquake.usgs.gov. Retrieved 27 August 2022.
^Cite error: The named reference PAGER-CAT was invoked but never defined (see the help page).
^Cite error: The named reference ISC-GEM was invoked but never defined (see the help page).
^"M 8.0 - 171 km S of Hydaburg, Alaska". earthquake.usgs.gov. Retrieved 27 August 2022.
^NRC, The M8.1 Haida Gwaii (formerly Queen Charlotte Islands) Earthquake of August 22, 1949, Natural Resources Canada
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