Geologic Resources

For the more information about the geologic resources of the National Park Service, please visit http://www.nature.nps.gov/geology/.

Geologic Hazards

Large boulder rockfall severely damaged this park housing at Zion National Park, Utah. There were no injuries.

Overview

The geologic processes that formed the spectacular landscapes of many national parks remain active today, and can be hazardous to park visitors, staff, infrastructure, and neighbors. Potentially hazardous processes include volcanic eruptions and other geothermal related features, earthquakes, landslides and other slope failures, mudflows, sinkhole collapses, snow avalanches, flooding, glacial surges and outburst floods, tsunamis, and shoreline movements. This site provides information on geologic hazards in U.S. National Parks and NPS Geologic Hazards Management.

What are Geologic Hazards?

Geohazards are any geological or hydrological process that poses a threat to people and/or their property. Every year severe natural events destroy infrastructure and cause injuries and even deaths.

Safety Recommendations

When you are planning your visit to a park site, take the time to learn about the geologic hazards that you may encounter. In areas of known hazards, there may be hazard maps available on the park's website or you can request information at the visitor center. It is recommended that you and your travel companions become familiar with the hazards, possible escape routes, first aid facilities, shelters, and emergency contacts for each area that you plan to visit.

Natural processes can cause hazardous conditions at any time, even in "safe" areas where no incidents have been observed previously. Always be observant of the conditions around you and be prepared to respond to hazardous situations that may arise.