Seismic hazard is the hazard associated with potential earthquakes in a particular area, and a seismic hazard map shows the relative hazards in different areas. The maps are made by considering what we currently know about: Past faults and earthquakes; The behavior of seismic waves as they travel through different parts of the U.S. crust

2022年3月9日 · Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. The map is based on the USGS models for the conterminous U.S. (2023), Hawaii (2021), and Alaska (2023).

Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. The map is based on the USGS models for the conterminous U.S. (2023), Hawaii (2021), and Alaska (2023).

2022年3月9日 · Be aware of the earthquake hazard that could threaten your community—and know what to do in the event of an earthquake. When you are aware and prepared you have a better chance to be safe. Use the Preparedness information to find practical steps to protect yourself and your loved ones.

2019年8月6日 · What is earthquake hazard? Earthquake ground shaking varies from place to place and the hazard mapping in this project will show this variability. The mapped hazard refers to an estimate of the probability of exceeding a certain amount of ground shaking, or ground motion, in 50 years.

2024年12月19日 · Earthquake Hazards Program The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. We undertake these activities as part of the larger National Earthquake Hazards Reduction Program (NEHRP), a four-agency partnership established by …

A seismic hazard zone describes an area with a particular level of hazard due to earthquakes. Typically, a high seismic hazard zone is nearest a seismic zone where there are more earthquakes, and a lower seismic hazard zone is farther away from a seismic zone.

Data, models, maps, source code, access to publications, and additional resources for seismic hazard assessments can be found below.

Natural Hazards Mission Area, Earthquake Hazards Program, Earthquake Science Center April 12, 2019 Stratigraphic and structural relations in trench exposures and geomorphology at the Big Burn, Lily Lake, and Lester Ranch sites, Bear River Fault Zone, Utah and Wyoming

Please also see the new USGS Earthquake Hazard Toolbox for access to the most recent NSHMs for the conterminous U.S. and Hawaii. Earthquake Hazard and Probability Maps