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Video of massive rockfall, Evolène, Switzerland
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Oct 23, 2015
Rock Climbing Photo: RRG, Send me on my way 5.9-


Another angle here:


shamelessly copied from reddit.
Andy Million
From Murfreesboro TN
Joined Mar 25, 2012
91 points
Oct 23, 2015
In the first video, I wonder how the photographer happened to be next to the site right when the rockfall occurred. Must have been scary! FrankPS
From Atascadero, CA
Joined Nov 19, 2009
284 points
Oct 23, 2015
That's a big chunk of mountain coming down! David Gibbs
From Ottawa, ON
Joined Aug 18, 2010
10 points
Oct 23, 2015
Holy -$&@! T340
From Idaho
Joined Oct 25, 2011
5 points
Oct 23, 2015
Rock Climbing Photo: We shall continue with style
It's was being monitored since 2013, the geologists filming the event camped up there. they predicted it would happen within 48-72hrs. They also evacuated the town and closed the road through the valley beforehand. BigB
From Red Rock, NV
Joined Feb 18, 2015
311 points
Administrator
Oct 23, 2015
Rock Climbing Photo: Me
Bryan,

Do you know how they were able to predict it so well? Was there a big crack at the top that someone noticed was widening?

It may be useful to be able to apply such prediction methods elsewhere.
Jon Nelson
From Bellingham, WA
Joined Sep 17, 2011
5,133 points
Oct 23, 2015
Rock Climbing Photo: Stairway To Heaven - all the way to the Pearly Gat...
Jon Nelson wrote:
Bryan, Do you know how they were able to predict it so well? Was there a big crack at the top that someone noticed was widening? It may be useful to be able to apply such prediction methods elsewhere.



They probably setup a laser monitoring system that measures the movement. There are similar systems for monitoring glacier movement. They also had something similar to measure the growth of the dome in the crater of Mt. St. Helens. There was probably a rapid increase in movement over the past week. Could well have come from fall moisture and cold temps causing just enough expansion to cause the collapse.
Allen Sanderson
From Oootah
Joined Jul 6, 2007
1,194 points
Oct 23, 2015
Rock Climbing Photo: We shall continue with style
Not sure how(seismograph?)... article just says they've(geologists) been monitoring it since 2013


Edit: Allen's answer above mine^^ seems more likely
BigB
From Red Rock, NV
Joined Feb 18, 2015
311 points
Administrator
Oct 23, 2015
Rock Climbing Photo: Me
Allen Sanderson wrote:
They probably setup a laser monitoring system that measures the movement. There are similar systems for monitoring glacier movement. They also had something similar to measure the growth of the dome in the crater of Mt. St. Helens. There was probably a rapid increase in movement over the past week. Could well have come from fall moisture and cold temps causing just enough expansion to cause the collapse.



Thanks.
Yes, this does seem likely. My reason though for asking, is that I imagine the complete story of the discovery and prediction method would be pretty interesting.
Jon Nelson
From Bellingham, WA
Joined Sep 17, 2011
5,133 points
Oct 23, 2015
Rock Climbing Photo: Me
Scary shit.. Walter Galli
From Sint Maarten
Joined Sep 2, 2015
1,487 points


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