By Dave Tucker June 7, 2013
The source of the debris flow in the Middle Fork Nooksack River is now believed to be a large landslide rather than a glacial outburst flood. This is based on new aerial photos provided by John Scurlock and Steph Abegg. The updated post is on the MBVRC blog.
There is video I made when I visited the deposits two days ago. See it here on YouTube. Shows the extent of the debris flow deposit at the Ridley Creek ford.
And another YouTube video shows a volcanic debris flow [a.k.a. ‘lahar’] raging down a valley in Indonesia. It is probably similar to the Middle Fork flow, except considerably smaller.
There will be another visit to the deposit Sunday AM early by a geologic team to begin serious study of the deposits and to try to begin estimating volume, velocity and other parameters of the May 31 debris flow. There will probably be an update posted on the MBVRC blog, so if you don’t already subscribe to it, consider doing so.
Filed under: floods and high water, lahars and debris flows, landslides, Mount Baker, Mount Baker Volcano Research Center, natural hazards | Tagged: debris flow video, Deming Glacier, John Scurlock, lahar video, landslides, Middle Fork Nooksack River, Steph Abegg |