Downslope flow of ash and rock debris resulting from volcanic activity.
- Mount Rainier - Living Safely With a Volcano in Your Backyard [More info]
- One of our Nation's most dangerous volcanoes, Mount Rainier has been the source of countless eruptions and volcanic mudflows, and many people live in the areas that will be affected by it.
- Types and effects of volcano hazards [More info]
- Describes the 6 main types of hazardous activities and processes associated with volcanoes, including tephra, lava flows, pyroclastic flows, lahars (volcanic mudflows), landslides, and volcanic gas.