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Avalanche: Gibson Canyon 1/23/2010

Observer Name:

Toby Weed

Observation Date:

01/25/2010

Occurrence Date:

01/23/2010

Occurrence Time:

Overnight

Region:

Logan
Little Bear
Gibson Canyon

Location

41° 40' 51.7908" N, 112° 0' 58.8384" W

Avalanche Characteristics

Elevation:

8500'

and below

Aspect:

Northeast

East

Southeast

Alpha Angle:

Trigger:

Natural

Trigger: additional info:

Repeater

Avalanche Type:

Hard Slab

Weak Layer:

Facets

Depth (avg):

Depth Range:

3' to

Width:

1/4 mile

Width Range:

1/4 mile to

1/2 mile

Vertical:

2500'

Vertical Range:

2250' to

2750'

General Comments

We went up to Maple Bench and into the Wellsville Mountain Wilderness on 1-25-10 to have a look at the Large Natural Avalanche from overn

Video 1:

General Comments 2

The avalanche ran full-path, just short of cut line from a similar natural release in 2004, and it cleaned out a few more big tooth maple and mountain ash trees.

Video 2:

General Comments 3

Huge debris pile, including a good deal of splintered hard wood, rough estimated at 30+ acres...

General Comments 4

Despite snow and wind after the avalanche, a large crown was visible a couple days later across the top of a few of the broad bowls that make up Gibson Canyon drainage and share the avalanche path or gully...

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