Science Center Objects

Educational videos about the science of landslides and debris flows.

USGS Landslides & Debris Flows Videos

Riding The Storm - Landslide Danger in the San Francisco Bay Area

  • A catastrophic 1982 rainstorm triggered 18,000 landslides in the Bay Area, claiming 25 lives and causing $66 million in property damage
  • The combination of steep slopes, weak rocks, and intense winter storms make Bay Area uplands an ideal setting for landslides
  • Landslides include both swift, potentially deadly debris flows and slower, but destructive deep-seated slides
  • Learn what USGS scientists have discovered about landslide dynamics and which slopes are most susceptible to sliding
  • Hear the devastating stories of Bay Area residents affected by landslides and learn to recognize the danger signs​​​​​​​​​​​
  • See the Trailer and Download the Movie
  • Request a free DVD - contact Rex Baum(

What is a debris flow? - Santa Barbara County