4.9-magnitude earthquake recorded in waters west of Vancouver Island

A mild earthquake has been recorded west of Vancouver Island in the same area where three more powerful quakes struck about 10 days ago.

The U.S. Geological Survey says the shallow quake had a magnitude of 4.9.

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It was centred about 250 kilometres west of Tofino and occurred just before 9:30 p.m. Wednesday night.

The shaker was not strong enough to cause injuries or damage and did not generate a tsunami.

Three quakes measuring 6.5, 6.6 and 6.8 were recorded in the same area on Oct. 22, followed by at least four aftershocks.

USGS geophysicist Zachary Reeves in Golden, Colorado, said at the time that the three quakes occurred over about an hour and at a shallow depth of about 10 kilometres. He described the quakes as "pretty big."

Seismologists said then that further aftershocks could be expected.

British Columbia is located on the Pacific Ring of Fire, an active seismic zone where thousands of mostly small earthquakes are recorded annually by sensors in the province.

Most of the quakes happen near the Cascadia subduction zone, an area where the Juan de Fuca and North American tectonic plates converge, stretching from Vancouver Island to northern California.

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