1882 Fort Collins earthquake

Earthquake in Colorado, US October 2026 October 2026 1882 Fort Collins earthquake 1882-11-08 19:30:00 ushis230 1882 11 07 USA Colorado#USA fa 6.2, w 6.6±0.6 40.5 -105.5 inline,title Northern Colorado United States VII The 1882 Fort Collins earthquake or Front Range earthquake measured w 6.6 and struck near Fort Collins, Colorado at 1:30 UTC on November 8, which was 18:30 on the November 7.Admin CGS 1882-11-08 Case Study: The Big One – Colorado Geological Survey https://coloradogeologicalsurvey.org/1882/46696-case-study-the-big-one/ 2024-05-05 Colorado Geological Survey The earthquake occurred as the result of deformation within the Front Range and caused shaking as strong as Modified Mercalli intensity (MMI) VII (Very Strong). Shaking was felt as far away as Salt Lake City, Utah and Salina, Kansas. An aftershock struck locally at 04:45 on November 8 and was felt as far as Laramie, Wyoming and Meeker, Colorado. It is the largest earthquake in Colorado's history.M 6.6 – Front Range, west of Fort Collins, Colorado https://earthquake.usgs.gov/earthquakes/eventpage/ushis230/executive United States Geological Survey Tectonic setting The Southern Rocky Mountains are still actively growing due to the Laramide orogeny. The Front Range accommodates some of this as a deformation front of the orogeny. Stresses in this region are generally northwest–southeast oriented. The causative fault of this specific earthquake is unknown, but other earthquakes such as the 1984 Wyoming earthquake struck at a depth of 20 km on.Spence Langer Choy 1996Wong Humphrey 1989 Earthquake The w 6.6w 6.6±0.6,Spence Langer Choy 1996 fa 6.2Kirkham Rogers 1986 earthquake struck at 01:30 on November 8 in UTC time, or 18:30 on November 7. The earthquake caused Modified Mercalli intensity (MMI) VII (Very Strong) shaking in various localities near in the Front Range urban corridor and was felt over an area of 470000 sqkm on.Spence Langer Choy 1996 Due to the sparseness of the epicentral region, very little is known about where exactly the earthquake occurred.Spence Langer Choy 1996 An aftershock of magnitude 4.5 to 5.0 was also felt in the urban corridor.Kirkham Rogers 1985 This earthquake is the largest known to have occurred in the state of Colorado.Kirkham Rogers 1986 Damage At the University of Colorado Boulder, plaster fell from the ceiling. In Denver, some bolts snapped and bent at an electric light plant. In La Porte, a wooden house suffered cracking. At Thompson, a house's walls were severely cracked and the plaster on some walls came off. Glass windows broke in Laramie.Kirkham Rogers 1986 Notes References Sources An Interpretation Of The November 7, 1882 Colorado Earthquake https://coloradogeologicalsurvey.org/publications/interpretation-november-7-1882-colorado-earthquake/ Kirkham Robert M. 1986 10.58783/cgs.of8608.ujor4101 2024-05-04 Rogers William P. subscription Bulletin 46 – Colorado Earthquake Data and Interpretations 1867–1985 http://hermes.cde.state.co.us/drupal/islandora/object/co:10888/datastream/OBJ/view Kirkham Robert M. 1985 10.58783/cgs.b46.fdpq8494 2024-05-04 Rogers William P. subscription Spence William Langer C. J. Choy George L. Rare, large earthquakes at the Laramide deformation front—Colorado (1882) and Wyoming (1984) Bulletin of the Seismological Society of America 1 December 1996 86 6 1804–1819 10.1785/BSSA0860061804 https://pubs.geoscienceworld.org/ssa/bssa/article-abstract/86/6/1804/102649/Rare-large-earthquakes-at-the-Laramide-deformation 4 May 2024 subscription Wong Ivan G. Humphrey James R. Contemporary seismicity, faulting, and the state of stress in the Colorado Plateau Geological Society of America Bulletin 1 September 1989 101 9 1127–1146 10.1130/0016-7606(1989)101<1127:CSFATS>2.3.CO;2 https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/101/9/1127/182336/Contemporary-seismicity-faulting-and-the-state-of 4 May 2024 subscription Category:1880s earthquakes Category:Earthquakes in the United States Category:1882 in Colorado Category:November 1882 in the United States Category:Fort Collins, Colorado