The Pandemonium Creek slide occurred in 1959 in the Coast Mountains of British Columbia, Canada near the valley of the Atnarko River. It was a debris avalanche consisting of 5,000,000 m3 (180,000,000 ft3) that travelled about 9 km (5.6 mi) and is thought to have reached speeds of up to 100 metres per second (330 ft/s).
The Pandemonium Creek slide occurred in 1959 in the Coast Mountains of British Columbia, Canada near the valley of the Atnarko River. It was a debris avalanche consisting of 5,000,000 m3 (180,000,000 ft3) that travelled about 9 km (5.6 mi) and is thought to have reached speeds of up to 100 metres per second (330 ft/s).
Source: Wikipedia "Pandemonium Creek slide" · CC BY-SA 4.0
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