creating an alluvial fan — one of the most visually compelling and dynamic features of geology. In the case of the San Gabriel Mountains, debris flows are a scenario that’s been explored many ...

A debris flow channel in a severely burned watershed in Idaho. Amirhossein Montazeri/Boise State University, CC BY-ND ...

While damaging debris flows are not the most likely outcome ... research hydrologist with the U.S. Geological Survey. That's because the steepness of the San Gabriel Mountains and the deep ...

With rain finally on the way this weekend, debris flows are a real concern below ... research hydrologist with the U.S. Geological Survey. That's because the steepness of the San Gabriel Mountains ...

"These are a particularly dangerous hazard in that really even modest rainstorms can produce dangerous flash floods and debris flows," said Matthew Thomas, a research hydrologist with the U.S.

California has relatively young mountains from a geology standpoint ... rain over fire-scarred mountains unleashed a debris flow that killed 16 people who had gathered at a church facility ...

Debris flow: When water rapidly flows downhill and ... in October 1978 that destroyed more than 20 homes. The California Geological Survey said the heavy rains between December 1977 and April ...

Rain on burned hillslopes can trigger dangerous floods and debris flows. Those debris flows can move with the speed of a freight train, picking up or destroying anything in their path. They can move ...