Screenshot 2023-11-24 182540

Question 4 1.5/1.5pts Dr. Dave Petley is one of the world's authorities on mass wasting. He wrote a short blog about one of the greatest debris flow videos: https:/blogs.agu.org/landslideblog/2016/01/24/the-greatest-ever-debris-flow-video- aconcagua/ = In this blog, he asks the reader to look for a classic feature of a dry bouldery front and then surges (indicated by more volume pulsing by). Please watch the video and take notes on when these characteristics occur. Then, select the best "fill ins" to this sentence. The time index of the dry bouldery front is , and the times of surging in the debris flow are 0.57;1.37 and 2:09