Active Faults



The Active Fault Hazards Program provide research and information of Montana’s active faults that demonstrate fault activity during the recent geologic time (Quaternary faults) and have the potential to generate damaging earthquakes. Hazards associated with active faults include earthquake damage due to ground shaking, surface displacement due to fault rupture, triggering of landslides, and liquefaction. New fault mapping, paleoseismology, radiometric dating techniques, and remote sensing techniques using Light Detection and Ranging (Lidar) provides means to identify new active faults and update Montana’s Quaternary fault database used for the National Seismic Hazards Maps. Figure is a preliminary Quaternary fault database for the state of Montana (Figure derived from Petr Yakovlev).



Related Publications and Data

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Probabilistic earthquake hazard maps for the state of Montana

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Earthquakes: History and seismic safety in Montana

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Quaternary faults and seismicity in Western Montana

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U.S. Geological Survey Seismic Hazard Maps