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Whitehorse escarpment, Yukon: a landslide caught on a monitoring digital camera – The Landslide Weblog

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Whitehorse escarpment, Yukon: a landslide caught on a monitoring digital camera

The Whitehorse escarpment is a c.50 m excessive steep slope near town of Whitehorse within the Yukon, Canada.  It’s fashioned from glaciolacustrine sediments, consisting primarily of silts, gravels and clay.  Because the Forties no less than this slope has been topic to important landslides – certainly there’s a detailed report from 1959 that particulars landslides within the neighborhood of Whitehorse airport, with a collection of occasions recorded in 1948 for instance.  The landslides primarily happen within the spring and early summer time months throughout the melting interval, when water permeates by means of the coarser grained supplies to the clay layers, the place it swimming pools and exits the slope, inducing failure.

A month in the past, on 30 April 2022, a big failure developed on Robert Service Method near downtown Whitehorse.  This landslide, with an estimated quantity of 3-4,000 cubic metres, triggered some disruption however no lack of life.  CBC has a quite good picture of the aftermath:-

The 30 April 2022 landslide on Whitehorse escarpment. Picture by Vincent Bonnay/Radio-Canada, by way of CBC.

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Additional doubtlessly unstable places have been recognized, most notably close to to Jeckell St. and sixth Avenue.  That is the positioning on Google Earth:-

The location of the 28 Might 2022 landslide on the Whitehorse escarpment within the the Yukon, from Google Earth.

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The placement is 60.712, -135.055.  Late final week, Panya Lipovsky and Jeff Bond of the Yiukon Geological Survey positioned a monitoring digital camera at this website.  Lower than 24 hours later the slope failed.  The landslide was captured on a superb video that they’ve have shared by way of the YGS Fb web page.  It’s best to be capable of see the landslide video on this tweet from the Metropolis of Whitehorse:-

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The aftermath of the landslide was captured in {a photograph} by an area resident, Amy Smarch:-

The aftermath of the 28 Might 2022 landslide on the Whitehorse escarpment. Picture by Amy Smarch by way of CBC.

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Notice that the childrens’ playground had been roped off previous to the failure.

The video is a very good illustration of the complicated circulate patterns in landslides of this sort.  The era of fairly massive quantities of mud exhibits that components of the landslide have been fairly dry, however it’s fascinating to see the water flowing out of the toe of the landslide because the motion got here to a cease.

Your complete escarpment is being monitored, and components of the foot of the slope have been fenced off.  There metropolis has acknowledged that there isn’t a danger to public or non-public properties.

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Acknowledgement

Due to loyal reader Tor Bejnar for highlighting this occasion, which was reported within the Arctic Sea Ice Discussion board.

 




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