Environment

Contenu concernant les préoccupations environnementales et les questions - Content concerning environmental concerns and issues

Ancient landslides offer clues to powerful earthquake that rattled Ottawa

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Very close to 1000 AD, an earthquake estimated at a magnitude of 6.1 — or possibly stronger — shook this region enough to cause 10 major landslides.

One of them, at Quyon, covered an area of 31 square kilometres stretching back from the Ottawa River along the Quyon River valley.

And scientist Gregory Brooks, who studied the slides, says the same seismic conditions are present today.

That means a big earthquake like the one Brooks studies, though very rare, could happen again.

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