Observer Name
Lundahl
Observation Date
Tuesday, January 19, 2016
Avalanche Date
Tuesday, January 19, 2016
Region
Logan » Logan River » White Pine Canyon » White Pine Lake
Location Name or Route
Mt. Gog south face, White Pine Lake
Elevation
9,000'
Aspect
South
Slope Angle
39°
Trigger
Snowmobiler
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
2'
Width
150'
Vertical
600'
Comments
This was triggered from low on the slope.
Comments
I visited this site on Thursday (1-21-16). The snow plastered on the tree bases low on the slope indicates a much broader natural slide occurred on the same slope, maybe a day or two before this one was triggered... The natural was likely a storm slab failing on small faceted grains (NSF). The triggered avalanche (1-19-16) failed on the reloaded bed surface lower in the snowpack on weak faceted crystals sandwiched between crusts, with the lower one perhaps the December 8-9 rime-crust.
Coordinates