Discussion Topic |
|
This thread has been locked |
neebee
Social climber
calif/texas
|
|
hey there, say, mighty hiker... thank you for the update, and nice, post...
yes, also, i hope his wife is recovering well, and
has many around her, to keep her strong through this
sad time, going forward, without him... :(
|
|
iron duchess maiden or whatever
Social climber
under a pile of rock
|
|
Mighty Hiker,
Sorry. I prefer to donate for those who were ours. I may sound like a boetch, but dean, stanley, many others, are and forever will be our people.
Hikers at the base of EC, are chance deaths. If I die hiking the base,
don't ever make a fuss. I strickly forbid you to make a fuss.
I saw a 2011 rockfall, that side of EC (the sailboat) while climbing on the other side of the ditch. We all stood up in Camp 4 in 2008 when EC growled one nignt. All checked on whom they knew on the beast that night.
I may sound mean to those who recently died, but I'd rather die there, than 3 years of cancer on a bed like many people I watched dying slowly over the last years.
Cheers.
RIP to all of us, ultimately, that's where we are heading.
SAA
Shipoopoi,
it's not: pass the poser pete, it is Pass The Pinot Pete.
|
|
Late Starter
Social climber
NA
|
|
They just got done bailing off the E. Buttress.
Some opinions are better left unsaid (specifically yours). And yes, you're a total Jackass(This opinion is OK, as it's plainly obvious).
|
|
i'm gumby dammit
Sport climber
da ow
|
|
Sorry. I prefer to donate for those who were ours. I may sound like a boetch, but dean, stanley, many others, are and forever will be our people. perhaps you could make a list of who is 'ours' and who isn't so we can know whether donating to their cause is ok or not.
|
|
Reilly
Mountain climber
The Other Monrovia- CA
|
|
Does every thread have to turn into a pissing match?
|
|
Gary
Social climber
Desolation Basin, Calif.
|
|
Pretty much.
|
|
j-tree
Big Wall climber
Typewriters and Ledges
|
|
Quoting iron duchess maiden or whatever
Sorry. I prefer to donate for those who were ours. I may sound like a boetch, but dean, stanley, many others, are and forever will be our people.
Hikers at the base of EC, are chance deaths. If I die hiking the base,
don't ever make a fuss. I strickly forbid you to make a fuss.
I saw a 2011 rockfall, that side of EC (the sailboat) while climbing on the other side of the ditch. We all stood up in Camp 4 in 2008 when EC growled one nignt. All checked on whom they knew on the beast that night.
I may sound mean to those who recently died, but I'd rather die there, than 3 years of cancer on a bed like many people I watched dying slowly over the last years.
Cheers.
RIP to all of us, ultimately, that's where we are heading.
SAA
The hypocrisy is awesome:
http://www.supertopo.com/climbing/thread.php?topic_id=3009252&msg=3010530#msg3010530
Quoting iron duchess maiden or whatever
As i am watching the beauty of sunrise on the valley, I can't help wondering about the foulness on the Taco.
The sunrise is via the webcams. The foulness seems just as real as the sunrise. Perhaps more. It seems I can smell its stench.
and
http://www.supertopo.com/climbing/thread.php?topic_id=2642895&msg=2643102#msg2643102
Quoting iron duchess maiden or whatever
Yes Tom,
you do know how the Taco is. These days, as before...
it hasn't changed much, except of course, for
the fact that the haters are proportionally increasing. It's a new generation Tom. 1970s climbers were proud and free. But these kids, it's scary. Seems a lot of young people have little to do all day other than throwing up their last meal onto whatever appears on their screen.
Pathetic.
|
|
gstock
climber
Yosemite Valley
|
|
We recently learned something interesting about the 22 October 2017 El Capitan rockfall that I wanted to pass along.
Using new structure-from-motion photogrammetry techniques, we have been able to make photo-based 3D models of the recently active area of El Capitan after each major rockfall; by differencing these models we can precisely determine rockfall locations, dimensions, and volumes.
Analysis of the 22 October rockfall shows that it was located beneath the larger scars from the 27-28 September rockfalls, and that it connected with a scar created back in October 2010. The rockfall consisted of an exfoliation sheet 12-16 meters (40-52 feet) wide, 28 meters (90 feet) tall, and up to 1 m (3 feet) thick, for a total volume of 187 cubic meters. (As a reminder, the biggest rockfall on 28 September was more than 10,000 cubic meters in volume.)
The more interesting - and unexpected - result is that the analysis also shows unequivocally that a similar-sized exfoliation sheet located directly above the 22 October source area has moved outward by about 10-20 cm (4-8 inches). This likely happened coincident with the 22 October rockfall, but it is also possible that the deformation occurred gradually. This is the first time that we have positively identified deformation of this type.
Considering that predicting a rockfall requires knowing exactly when it will occur, where it will occur, and how big it will be, it is interesting to think that we have 2/3 of that information here.
Unfortunately, determining the remaining 1/3 (exactly when it will occur) is not (yet) possible. We will continue to monitor the detached sheet, but it could exist for years or longer... or it could fall off tomorrow. I just wanted to pass along this information as climbers consider their El Cap objectives for next year.
This research is collaborative between the NPS, USGS, and University of Lausanne.
Greg Stock
Yosemite Park Geologist
(209) 379-1420
greg_stock@nps.gov
|
|
Levy
Big Wall climber
Calabasas
|
|
Fascinating post Greg. It is interesting how modern technology enables us to see the outward bulges before they fall off.
It gives new meaning to the term "expanding flake'!
|
|
Jon Beck
Trad climber
Oceanside
|
|
That is amazing, thanks for posting
|
|
mtnyoung
Trad climber
Twain Harte, California
|
|
Looks like a nice lieback flake, but I wouldn't do it.
Well that caption got me to laugh out loud :)
|
|
crøtch
climber
|
|
Great work, Greg!
|
|
FRUMY
Trad climber
Bishop,CA
|
|
Greg, TFPU.
|
|
Mighty Hiker
climber
Outside the Asylum
|
|
Greg, did you see the photos that someone took of one of the rockfalls in September, showing rocks going straight sideways from the wall? That is, showing the release of the tension/compression forces?
What was the sequence of dates and volumes/masses from September on, at least of the larger falls? I take it that there have been many minor subsequent falls.
|
|
'Pass the Pitons' Pete
Big Wall climber
like Ontario, Canada, eh?
|
|
Don't even waste my time with a mere 187 cubic meters, dude....
We eat that kinda stuff for breakfast.
I am out right now and way from my laptop and my photos. Was October 22nd rockfall the big one that happen at 6 in the morning in the dark?
|
|
Lambone
Big Wall climber
Ashland, Or
|
|
Thanks Greg!
Meanwhile...Klaus plots his new line!
|
|
Clint Cummins
Trad climber
SF Bay area, CA
|
|
Great work, Greg.
Thanks for sharing.
|
|
gstock
climber
Yosemite Valley
|
|
There were two large rockfalls in October, one on the 20th at about 6 am and another on the 22nd at 4:04 pm. I think the scar shown in my last post might be composite from those two events, but we aren't able to parse that out in our analysis. The scar created on September 28 has also had several small rockfalls from within it.
Overall there have been more than a dozen rockfalls from this location since late September, with the latest one occurring on November 30 at 4:37 pm. This latest one was relatively small (about 25 cubic meters) and came from the very top of the scar.
Anders, I did see Pete's video that seemed to show a rockfall coming off the cliff with some initial horizontal component, but I think that might be an illusion due to the overhanging nature of the cliff there. Generally speaking rockfalls tend to initiate vertically (except during earthquakes), but I am open to other possibilities.
|
|
|
SuperTopo on the Web
|
Let us know!