Where i get some information on avalanches is:
http://www.abc-of-snowboarding.com/info/avalancxhe-types.asp
http://www.abc-of-snowboarding.com/info/avalanche-causes.asp
http://www.abc-of-snowboarding.com/info/avalancxhe-types.asp
http://www.abc-of-snowboarding.com/info/avalanche-causes.asp