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| |-+  Weak Layers: decision making in avalanche terrain
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Author Topic: The Wave  (Read 6008 times)
freeski
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The Wave
« on: 02/03/14, 02:38 PM »

Last year I stopped to experiment with some recently formed small cornices that had formed along a HWY 20 snow drift.

I pushed my hand downward through the overhang interface with the main body until the cornice triggered and fell away. I was surprised that a ripple wave pattern was evident on the remaining face after the cornice fell away. I repeated this many times with the same result.

When I pushed my hand down into the snow at the trigger point  and pulled forward, and thus not allowing the cornice to trigger naturally, no wave pattern was evident on the remaining snow face.

Just an observation


* propagation_wave.jpg (92.88 KB, 980x735 - viewed 1343 times.)
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two sets of principles. They are the principles of power and privilege and the principles of truth and justice. If you pursue truth and justice it will always mean a diminution of power and privilege. If you pursue power and privilege, it will always be at the expense of truth and justice
C Hedges
Ian
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Re: The Wave
« Reply #1 on: 02/18/14, 02:57 PM »

This is a result of conchoidal fracture, it happens when a material doesn't have any natural planes of seperation.
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T. Eastman
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Re: The Wave
« Reply #2 on: 02/18/14, 06:43 PM »

... or in another sense, a ripple...
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Snoqualmonix
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WWW
Re: The Wave
« Reply #3 on: 02/19/14, 07:28 PM »

Ah yes, the ripple...and this is the SOUND of it.
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"Point your tips and be brave"

If someone skis in the Cascades and doesn't post on the internet, did it even happen?
all mtn
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Re: The Wave
« Reply #4 on: 02/22/14, 05:00 PM »

Waves and snow also intermingle as the storms from the Gulf of AK can deliver Pacific Ocean energy in the form of large ocean swells, which then create significant snowfall for the western mountains when the storm makes landfall. The swells create excellent surfing conditions, if the coastal area has a high pressure and light winds. After the good surf, one can usually expect good snow.


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freeski
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Re: The Wave
« Reply #5 on: 02/23/14, 09:03 AM »

Yea, windsurfing the incoming storm with good friends in those cold winter waters of the straights of juan of de fuca, and then skiing the storm snow at stevens pass on the road home...got to love those energy waves.
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two sets of principles. They are the principles of power and privilege and the principles of truth and justice. If you pursue truth and justice it will always mean a diminution of power and privilege. If you pursue power and privilege, it will always be at the expense of truth and justice
C Hedges
all mtn
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Posts: 464


Re: The Wave
« Reply #6 on: 03/05/14, 07:33 PM »

Freeski, you rock. Stick to the board, the kite (can) get sketchy. And down here in the Tahoe area we just got a 2 - 4 ft storm. And parts of California beaches benefitted greatly from this. Surfer mag.com has photos
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