3 Mega Quakes Hit Canada 6.6 / 6.8 / 6.5 Seismic Waves
- Powerful earthquakes strike off Canada’s coast. Here’s what it means for us in Washington state
by https://www.seattletimes.com/
The earthquakes did not put any additional stress on the Cascadia Subduction Zone, where the big earthquake is expected to take place.
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Several powerful earthquakes shook an underwater ridge off the coast of Canada Sunday night, hitting the Juan de Fuca plate that is expected to eventually cause “the big one” in the Pacific Northwest. Geologists downplayed their significance in terms of predicting when the bigger quake would occur.
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Four tremors were recorded within 45 minutes of one another off the coast of Vancouver Island, Canada, according to Harold Tobin, the director of the University of Washington’s Pacific Northwest Seismic Network. They started at 9:39 p.m. with a 6.6-magnitude quake, followed by a 6.8-magnitude shaking at 10:16 p.m. Tremors with magnitudes of 6.5 and 4.9 followed at 10:22 p.m. and 10:36 p.m., respectively. Several aftershocks followed. Emergency Info BC tweeted that the quakes were felt in parts of the province, but there were no reports of damage or injury.
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The tremors occurred at the Pacific Ocean-floor ridge that separates the Juan de Fuca Plate and its western neighbor, the Pacific Plate. But they do not necessarily signal an impending 9.0-magnitude earthquake, or a so-called “big one,” that geologists predict will hit Pacific Northwest, according to Tobin. That earthquake is expected to occur along the Cascadia fault line on the eastern side of the Juan de Fuca Plate.
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