Landslides & Debris Flow | Ready.gov
2021-9-12 · Landslides & Debris Flow. Landslides occur in all U.S. states and territories and can be caused by many factors including earthquakes, storms, volcanic eruptions, fire and human modification of land. The most deadly landslides are the ones that occur quickly, often with little notice. In a landslide, masses of rock, earth or debris move down a ...