![]() Magnitude is determined by measurements of recordings on seismographs. ![]() With our current state of knowledge, it is not possible to predict when or where, the next large earthquake might occur in Colorado.Įarthquakes are measured in several ways: magnitude, intensity, and ground acceleration. There are many more faults in the state that could probably generate significant earthquakes, but have not received sufficient study, or documentation, to be included in the hazard map. The CGS conducts scientific studies of fault zones and past earthquakes while monitoring fault movements with a network of seismometers throughout Colorado.įive faults in Colorado have received sufficient study to be included in the USGS National Seismic (Earthquake) Hazard Map (version 2018 NSHM), and three of those are listed as being capable of generating earthquakes of 7.0 magnitude, or greater. However, the state has experienced large natural (magnitude 6.5 or higher) and human-triggered (induced) earthquakes in recorded history and will continue to periodically experience large earthquakes in the future.īecause fault movement causes earthquakes, it is important to study the thousands of faults in Colorado to determine whether they have moved in the recent geologic past or capable of moving again in the near future. Colorado experiences fewer and less frequent earthquakes on average than more seismically active states like California and Alaska. The active landscape of the state-with the still-rising mountains containing thousands of faults-features over 90 potentially active faults and more than 700 recorded earthquakes of magnitude 2.5 or higher since 1867. Colorado’s high mountains are a result of uplift on faults (with associated earthquakes) that are part of the rift system. ![]() These waves can cause noticeable shaking at the surface and, in the case of large earthquakes, damage to roads, buildings, and other infrastructure that may pose a threat to public safety.Ĭolorado is considered an active tectonic province that is essentially being pulled apart where the Rio Grande Rift cuts north/south across the mountainous, central part of the state. The resulting earthquake releases energy in waves that travel through the earth’s crust. As the rocks on either side of the fault accumulate stress between them, they will eventually overcome friction and slip. Think you just felt an earthquake? Check out the USGS Latest Earthquakes Map.Įarthquakes are caused by sudden movements of the earth along a fault.
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