Steel Rebar. Reinforcing bar, or rebar, is a common steel bar that is hot rolled and is used widely in the construction industry, especially for concrete reinforcement.
These flows generally occur during periods of intense rainfall or rapid snow melt. They usually start on steep hillsides as shallow landslides that liquefy and accelerate to speeds that are typically about 10 miles per hour, but can exceed 35 miles per hour. The consistency of debris flows ranges from watery mud to thick, rocky mud that can carry large items such as boulders, trees, and cars.
Once the side of the mountain was removed, the volcanic gases exploded out of the side of. the volcano producing a lateral blast. This blast, traveling at speeds of up to 1,072 km (670 mi) per. hour, quickly overtook the landslide and extended to up to 30.4 km (19 mi) from the volcano.