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Powerful Quake Strikes Queen Charlotte Islands Region

Posted by feww on November 18, 2009

Earthquake Measuring up to 6.8 Mw followed by a Strong Aftershock Strikes Queen Charlotte Islands Region

A powerful earthquake measuring up to magnitude 6.8 followed by a cluster of aftershocks, the largest of which measured up to M 6.0, struck Queen Charlotte Islands Region on Tuesday, November 17, 2009 at about 15:31 UTC, at a shallow depth of about 5 km.

Tsunami Information

The West Coast/Alaska Tsunami Warning Center in Palmer AK, said there was no threat of a damaging tsunami caused by the earthquake. However some neighboring regions could experience non-damaging sea level changes. “In coastal areas of intense shaking locally generated tsunamis can be triggered by underwater landslides.”

Earthquake location Map. Source: USGS/EHP. Enhanced by FEWW

Earthquake Details:

  • Magnitude: 6.6 [Maximum quake magnitude estimated by FEWW at 6.8 Mw]
  • Date-Time:
    • Tuesday, November 17, 2009 at 15:30:46 UTC
    • Tuesday, November 17, 2009 at 07:30:46 AM at epicenter
  • Location: 52.151°N, 131.378°W
  • Depth: 11.6 km (7.2 miles)
  • Distances:
    • 250 km (155 miles) SSW (197°) from Prince Rupert, BC, Canada
    • 315 km (195 miles) WNW (303°) from Port Hardy, BC, Canada
    • 331 km (206 miles) S (178°) from Metlakatla, AK
    • 662 km (411 miles) WNW (302°) from Vancouver, British Columbia, Canada
  • Location Uncertainty: horizontal +/- 5.5 km (3.4 miles); depth +/- 10.5 km (6.5 miles)
  • Source: USGS NEIC (WDCS-D)
  • Event ID:  us2009pcaq

Historic Seismicity. USGS/EHP. Enhanced by FEWW

The Largest Earthquake in Canada

Canada’s largest earthquake (magnitude 8.1) since 1700, occurred on August 22, 1949 off the coast of BC. It occurred on the Queen Charlotte Fault (Canada’s equivalent of the San Andreas Fault) – the boundary between the Pacific and North American plates that runs underwater along the west coast of the Queen Charlotte Islands off the west coast of British Columbia. The shaking was so severe on the Queen Charlotte Islands that cows were knocked off their feet, and a geologist with the Geological Survey of Canada working on the north end of Graham Island could not stand up. Chimneys toppled, and an oil tank at Cumshewa Inlet collapsed. In Terrace, on the adjacent mainland, cars were bounced around, and standing on the street was described as “like being on the heaving deck of a ship at sea”. In Prince Rupert, windows were shattered and buildings swayed. —Natural resources of Canada

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6 Responses to “Powerful Quake Strikes Queen Charlotte Islands Region”

  1. feww said

    Magnitude 7.7 Quake Strikes Queen Charlotte Islands, Canada

    Posted by feww on October 28, 2012

  2. […] Powerful Quake Strikes Queen Charlotte Islands Region […]

  3. […] Powerful Quake Strikes Queen Charlotte Islands Region […]

  4. […] Powerful Quake Strikes Queen Charlotte Islands Region […]

  5. Leyonia said


  6. Leyonia said

    [Any sources for the info? Moderator]

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