WHITEHORSE — More than 100 aftershocks had shivered across the Alaska Panhandle, southern Yukon and parts of northwestern British Columbia by early Tuesday following two powerful earthquakes a day earlier, but seismologists say while people need to be prepared, it isn’t time to be alarmed.
The U.S. Geological Survey reported the aftershocks, including at least a dozen Tuesday morning, in the wake of the 6.2 and 6.3 magnitude earthquakes Monday that were centred near Skagway, Alaska, but were felt as far away as Whitehorse and Ross River, which is more than 300 kilometres away.
Earthquakes Canada also reported a 4.5 magnitude quake jolted the Carcross region, about 75 kilometres south of Whitehorse on Tuesday morning.
Earthquake seismologist Alison Bird of the Geological Survey of Canada said continued shaking is expected.
“It’s sort of a swarm of activity, there seems to be some intense earthquakes,” she said.
“It’s fairly normal to have this sort of thing. This is an area that gets a lot of earthquakes anyway, but sometimes it sort of flares up in sudden activity.”
Powerful earthquakes almost always spawn aftershocks that can continue for years, she said, adding that the level of seismic activity in the Haida Gwaii region of B.C. remains elevated, five years after a magnitude 7.8 quake there.