Massive rockfall - Waterfall route

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Roger Breedlove

climber
Cleveland Heights, Ohio
Sep 30, 2017 - 06:38am PT
A frowning whale, with an intense evil eye.
High Fructose Corn Spirit

Gym climber
Sep 30, 2017 - 06:56am PT
The new scar does have an odd whale shape to it.

Yes. A breaching whale, too! Humpback?, lol


....


gstock, wow! Cool info, tfpu.
High Fructose Corn Spirit

Gym climber
Sep 30, 2017 - 07:11am PT
Wait, is our whale diving or breaching?
I only see the "evil eye" in the diving version, lol.


Breaching version.
High Fructose Corn Spirit

Gym climber
Sep 30, 2017 - 07:20am PT
If only the white could be retained over time then we'd have an angry Moby Dick diving!
clinker

Trad climber
Santa Cruz, California
Sep 30, 2017 - 07:32am PT
It is obviously a middle finger.
High Fructose Corn Spirit

Gym climber
Sep 30, 2017 - 07:44am PT
gstock, so at 10k cubic meter volume or larger, are you able to proximate freq of this event (eg, 1/20yr) for Yosemite Valley proper? Just curious, your take.

From the earlier map, I count about 15 10k or larger blobs since 1857 in Yose proper.
gstock

climber
Yosemite Valley
Sep 30, 2017 - 07:50am PT
Recurrence interval for a rockfall of this size in Yosemite Valley is about 6 years. The 2009 Ahwiyah Point rockfall was roughly 4 times larger than these El Capitan rockfalls.
WBraun

climber
Sep 30, 2017 - 07:57am PT
Here are the Temperatures leading up to the rock fall events.

These temperature extremes could have contributed to this rock fall event?

donini

Trad climber
Ouray, Colorado
Sep 30, 2017 - 07:59am PT
Prepare yourselves, the San Joaquin Valley is moving east into the crumbling Sierra.
Delhi Dog

climber
Good Question...
Sep 30, 2017 - 08:02am PT
wow!

Thanks for sharing gstock.
Fascinating.
I remember the big rockfall that came down in the early 80's from around upper yos falls.
Those boulders tumbling down the falls trail was some scary shite!

This must have been wild to be around. I can't imagine being in Pete + crew's position when that cut loose!
tuolumne_tradster

Trad climber
Leading Edge of North American Plate
Sep 30, 2017 - 08:50am PT
the next 100MY for California...

[Click to View YouTube Video]
tuolumne_tradster

Trad climber
Leading Edge of North American Plate
Sep 30, 2017 - 09:05am PT
Beachfront property DMT
Reilly

Mountain climber
The Other Monrovia- CA
Sep 30, 2017 - 09:07am PT
Looks like beachfront property in Elko, NV! WOOT!
zBrown

Ice climber
Sep 30, 2017 - 09:19am PT
First saw this video in the Physical Sciences building quite a few years ago.


[Click to View YouTube Video]

The long version with some history.

[Click to View YouTube Video]

The answer is blowing in the [180 mph] wind?



Harmonic distortion - karma


The main goal for Karma is to bring a productive testing environment to developers. The environment being one where they don't have to set up loads of configurations, but rather a place where developers can just write the code and get instant feedback from their tests. Because getting quick feedback is what makes you productive and creative.
zBrown

Ice climber
Sep 30, 2017 - 09:33am PT
and in news of the "Greg"


Geologist: Yosemite rock falls don't mean more danger

http://www.sfgate.com/news/us/article/Geologist-Yosemite-rock-falls-don-t-mean-more-12243162.php
guido

Trad climber
Santa Cruz/New Zealand/South Pacific
Sep 30, 2017 - 09:39am PT
Will Durant's famous aphorism:

"Civilization exists by geologic consent, subject to change without notice."
john hansen

climber
Sep 30, 2017 - 09:44am PT
There is a new report on Tom Evans site. 'El Cap report'.

He has photos of the rescue on the 27th.

Good thing that big one did not cut loose during that rescue, there were lots of Yosar folks up there...

That could have been real bad.
Bushman

climber
The state of quantum flux
Sep 30, 2017 - 10:08am PT
In geological time it was a mere split seconds between the two big rock falls. Good thing YOSAR made quick work of their search and rescue, as usual.
tuolumne_tradster

Trad climber
Leading Edge of North American Plate
Sep 30, 2017 - 10:09am PT
There's no increased risk due to the recent rockfall events because rockfall risk is always there and the recent events on El Cap are consistent with the historical record.
However...
Stock said it's impossible to predict when and where a rock fall will strike and detecting shifts in rocks could be a sign that one will break loose days or maybe years later.

The question "What finally caused or triggered the rockfall?" is a tough one...like asking which "straw" finally broke the camel's back? we know there are many "straws" of differing size being placed on the camel's back over geologic time.

"straws" include: seismic events, glacial melting, freeze/thaw, intense rainfall, chemical weathering, diurnal thermal expansion/contraction, piton placement, etc
ec

climber
ca
Sep 30, 2017 - 10:40am PT
My vote for the Beak placement...most tangibly dramatic!

 ec
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