Don't know when or how, but this fairly large avalanche looks to have been triggered by a rider at some point last week...
No way you could call this a "little avalanche", even if you're riding on a big machine!
Reports of avalanche activity like this help a lot with public safety..... It helps if other folks traveling in this country know when you can trigger slides like this.. Please report triggered and observed avalanches to the Utah Avalanche Center, we just want to help you stay on top of the snow.