Assignment:
1. Which of the following was so unusual about the Oso landslide?
a. Debris and dirt in the 600 ft high slope spread for an entire mile across the valley
b. The seismic signal for the event indicated 2 phases of flow
c. Covered a 1-mile wide stretch of HWY 530
d. This earth material came off the wall and travelled across the valley in 138 seconds