Canada earthquake: 7.7-magnitude earthquake hits British Columbia, strong aftershocks, tsunami warning issued

By on Oct 28, 2012 in Natural Disasters, North America, Science Comments

A 7.7-magnitude earthquake hits Canada on Saturday, October 27, 2012 (local date), and was followed by a series of strong aftershocks, the US Geological Survey (USGS) reported. Canadian news sites reported there were no immediate reports of damage, but the Pacific Tsunami Warning Center issued a tsunami warning to certain areas.

Canada earthquake tsunami warning map

Tsunami warning map, after earthquake hits
British Columbia, Canada

Image Credit: NWS Tsunami Alerts Twitter

According to a post at on late Saturday, the 7.7 magnitude earthquake occurred at 8:04:10 p.m. (UTC) and hit the south of Masset, Canada, is likely associated with relative motion across the Queen Charlotte fault system offshore of British Columbia, and had a depth of 17.5 km. (10.9 miles).

The USGS reported that its epicenter was a t 139km (86miles) S of Masset, and at 202km (126mi) SSW of Prince Rupert, Canada, and at 635km (395mi) SSE of Juneau, Alaska. The tsunami warning was coastal areas of British Columbia and Alaska – from the north tip of Vancouver Island, British Columbia, to Cape Decision, Alaska.

Minutes later, USGS announced a 5.8-magnitude aftershock that was felt at 154km (96miles) S of Masset, and 227km (141mi) SW of Prince Rupert. The Pacific Tsunami Warning Center said a small tsunami occurred, and that some coastal areas in Hawaii may feel small non-destructive sea level changes and strong currents for the next several hours.

Several minutes later, a 4.4-magnitude aftershock was recorded at 202 km (126 miles) S of Masset, and 260 km (162 miles) SSW of Prince Rupert, and 696km (432 miles) SSE of Juneau, Alaska. At least three more strong aftershocks were recorded on the same area, which ranged from 4.7 to 5.1 magnitudes.

As of 1:05 am ET, CNN reported that Julianne McCaffrey of the British Columbia Emergency Management told them that local officials are closely monitoring the coastal areas and ensuring people are complying with their directives, noting that they have not received any reports at this time of any damage.

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