This is from the Utah Avalance Center. Very Impressive.
Originally Posted by Bruce Temper
Wow. After a 28-year professional avalanche career, I don’t get impressed very often, but yesterday I witnessed the largest, most spectacular, natural avalanche I’ve ever seen outside of Alaska. Elk Point, near the Sundance Resort in the Provo area mountains released naturally yesterday around 11:00 am with a total fracture line width of over a half mile and 4-8 feet deep.