tag:blogger.com,1999:blog-9215023416646096443.post8938700282031336649..comments2018-10-25T23:22:28.229-04:00Comments on Avalanche Updates: Meteor-Triggered AvalanchesJonathan S. Shefftzhttp://www.blogger.com/profile/00532156922403744857noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9215023416646096443.post-87549703407798695892012-08-07T11:07:11.203-04:002012-08-07T11:07:11.203-04:00Here's a summary as presented by McClung, p. 1...Here's a summary as presented by McClung, p. 124:<br /><br />"At the sliding surface (and in the core), the friction is determined by particles (snowballs and crystals) interacting (colliding) with each other and the sliding surface, including the hardness of the sliding surface. This interaction takes the form of collisions and frictional rubbing between snow particles. The collision and rubbing friction causes heat to be generated on the exterior of particles, which produces small amounts of water on their surfaces. Once the deposit comes to rest, the water on article surfaces can freeze to fuse the particles together, producing a very hard deposit."Jonathan S. Shefftzhttps://www.blogger.com/profile/00532156922403744857noreply@blogger.comtag:blogger.com,1999:blog-9215023416646096443.post-78521517786295074722012-08-07T08:47:27.373-04:002012-08-07T08:47:27.373-04:00I have suspected that the friction created in snow...I have suspected that the friction created in snow avalanches is the reason that the debris is so hard. Friction heats up and melts a small amount of snow and upon coming to rest, the free-water in the snow combined with the now higher density snow crystals and refreezes. Do you know of any reading that has described this process?jerimyhttps://www.blogger.com/profile/05472551679919945867noreply@blogger.com