1983 Borah Peak earthquake

Earthquake in Idaho, United States May 2025 February 2025 1983 Borah Peak earthquake 1983-10-28 14:06:09 567352 usp0001zbv 1983 10 28 08:06 MDT Borah1983.JPG 260 Borah Peak with fault scarp seen near base of tan hill in foreground USA West#Idaho 6.9 Mw IX $12.5 million 16 km on Normal 44.08 N 113.8 W inline, title Lost River Fault 5.6 Mw Oct 28 at 19:51 UTC 5.5 Mw Oct 29 at 23:29 UTC Central Idaho United States Yes 2 killed, three injured The 1983 Borah Peak earthquake occurred on October 28, at 8:06:09 a.m. MDT 14:06:09 UTC in the western United States, in the Lost River Range at Borah Peak in central Idaho.https://news.google.com/newspapers?id=lP1LAAAAIBAJ&sjid=ffkDAAAAIBAJ&pg=5848%2C2561070 Spokane Chronicle Washington wire reports Idaho quake measures 6.9, two killed October 28, 1983 1https://news.google.com/newspapers?id=0jtWAAAAIBAJ&sjid=OOkDAAAAIBAJ&pg=6221%2C7500166 Eugene Register-Guard Oregon (Los Angeles Times) Quake jolts 8 states, kills 2 children October 29, 1983 1Ahttps://news.google.com/newspapers?id=uldWAAAAIBAJ&sjid=5u4DAAAAIBAJ&pg=5273%2C7162184 Spokesman-Review Spokane, Washington Sher Tom Killer quake rocks Northwest October 29, 1983 1 The shock measured 6.9 on the moment magnitude scale and had a maximum Mercalli intensity of IX (Violent). It was the most violent earthquake in the lower 48 states in over 24 years, since the 1959 Hebgen Lake earthquake in nearby southwestern Montana.https://www.nytimes.com/1983/10/29/us/two-children-die-as-quake-hits-northwest-and-canada.html Two Children Die As Quake Hits Northwest And Canada Associated Press The New York Times 29 October 1983 2018-11-12 Earthquake The Friday morning earthquake was caused by a slip on the preexisting Lost River Fault.https://publishing.cdlib.org/ucpressebooks/view?docId=ft7m3nb4pj&chunk.id=d0e7483&toc.id=d0e7483&brand=ucpress Observatory Seismology publishing.cdlib.org 2018-11-12 The event is the largest and most significant to strike in the state of Idaho. As a result of extreme surface faulting, a maximum Mercalli intensity of IX (Violent) was decided upon, while vibrational damage was at a Mercalli intensity of VI (Strong) to VII (Very strong). Three weeks later on November 18, President Ronald Reagan declared the earthquake a major disaster.https://news.google.com/newspapers?id=uIRfAAAAIBAJ&sjid=5jAMAAAAIBAJ&pg=5011%2C1207203 Lewiston Morning Tribune Idaho Associated Press Quake disaster area declared in Idaho November 19, 1983 3Chttps://ioem.idaho.gov/Pages/History/EQHistory.aspx Idaho Earthquake History ioem.idaho.gov 2018-11-12 2018-11-13 https://web.archive.org/web/20181113030346/https://ioem.idaho.gov/Pages/History/EQHistory.aspx dead Aftershocks were felt for a year afterwards;https://news.google.com/newspapers?id=vZg_AAAAIBAJ&sjid=EIMDAAAAIBAJ&pg=6984%2C3231565 Deseret News Salt Lake City, Utah 4.5 aftershock quietly shakes Challis-Mackay January 25, 1984 16B nearly ten months later, a 5.4 aftershock was recorded on August 22, 1984.https://news.google.com/newspapers?id=l5AzAAAAIBAJ&sjid=A4MDAAAAIBAJ&pg=7124%2C3178780 Deseret News Salt Lake City, Utah UPI Idaho quake jolts, but not like 1983's August 23, 1984 B19https://news.google.com/newspapers?id=RlhWAAAAIBAJ&sjid=9-4DAAAAIBAJ&pg=5184%2C4541459 Spokesman-Review Spokane, Washington wire services Earthquake jolts Idaho August 23, 1984 27 Surface faulting The rupture caused clear surface faulting; a 21 mi 0 on long northwest-trending zone of fresh scarps and ground ruptures was present on a slope of the Lost River Range. Extensive breakage occurred along a 5 mi 0 on in zone between West Spring and Cedar Creek; ground surface was literally "shattered" into tilted blocks, each several meters in width. These scarps were as broad as 330 ft. right|thumb|300px|A segment of the Borah Peak earthquake fault scarp near Willow Creek The ground breakage was 60 mi -1 in, and the throw on the faulting ranged from -0.5 to 2.7 m flip.https://www.idahogeology.org/historical-earthquakes-idaho Historical Earthquakes in Idaho Idaho Geological Survey idahogeology.org 2018-11-12 2018-11-13 https://web.archive.org/web/20181113025902/https://www.idahogeology.org/historical-earthquakes-idaho dead Damage The Challis-Mackay region experienced rather thorough damage, with eleven commercial buildings and 39 homes sustaining major damage while another 200 houses suffered minor to moderate damage. Mackay in particular, about 50 mi in southeast of Challis, experienced the most severe damage. Most of the city's large buildings on its Main Street were damaged, to some extent;https://news.google.com/newspapers?id=8TRTAAAAIBAJ&sjid=IYMDAAAAIBAJ&pg=4541%2C6179730 Deseret News Salt Lake City, Utah Warchol Glen DelPorto Brett Idaho quake cuts a swath of death and destruction October 29, 1983 A1 eight of these buildings were deemed condemned and closed down. Most of these buildings were built from materials such as brick, concrete block, and stone, each varying. An estimated $12.5 million in property damage was recorded. In some places, the water grounds shifted. Fatalities and injuries In Challis, two children were killed when a stone storefront collapsed on them while walking to school; two others suffered minor injuries. In Mackay, a woman was hospitalized due to her injuries.Shaughnessy Rick October 29, 1983 Quake rocks mountain states; Strong shock kills 2 children A1 The Times-News https://www.newspapers.com/clip/47774218/quake-rocks-mountain-states/ Newspapers.com March 31, 2020 Old Faithful After the earthquake and aftershocks, the eruption intervals of Old Faithful geyser in Yellowstone National Park, about 150 mi east, were noticeably lengthened.https://news.google.com/newspapers?id=W4RfAAAAIBAJ&sjid=3jAMAAAAIBAJ&pg=3884%2C2019027 Lewiston Morning Tribune Idaho (Washington Post) Reid T.R. Idaho quake upsets, yet befriends Old Faithful geyser October 7, 1984 5E Sand blows Sand boil Near Chilly Buttes of Thousand Springs Valley, a series of artesian fountains/sand blows erupted immediately after the main shock. Groundwater gushed from these fountains forming small craters and depositing aprons of light-colored sandy sediment around each crater. The blows were noted largely along waterways, especially where draws, or small streams, enter into larger ones. Observers noted that some blows had black, sediment-laden water while others ran mostly clear. Some blows continued for several minutes after the shaking stopped. The Big Lost River rose several inches as a result of this water being expelled from the ground. The eruptions were likely a response to liquefaction of a water-laden underground sediment layer.Youd T. Leslie The Borah Peak, Idaho earthquake of Oct. 28, 1983 Earthquake Spectra November 1985 10.1193/1.1585303 131701702 https://www.researchgate.net/publication/292301588 November 21, 2022 See also List of earthquakes in 1983 List of earthquakes in the United States Geology of Idaho 2020 Central Idaho earthquake References ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009) http://www.isc.ac.uk/iscgem/index.php ISC 2015 International Seismological Centre Version 2.0 PAGER-CAT Earthquake Catalog https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/ https://web.archive.org/web/20200313112456/ftp://hazards.cr.usgs.gov/web/data/pager/catalogs/ dead 2020-03-13 September 4, 2009 United States Geological Survey Version 2008_06.1 Stover C. W. Coffman J. L. Seismicity of the United States, 1568–1989 (Revised) – U.S. Geological Survey Professional Paper 1527 https://pubs.usgs.gov/pp/1527/report.pdf 1993 United States Government Printing Office 216–221 The Geology of Earthquakes R. S. Yeats K. E. Sieh Kerry Sieh C. R. Allen Clarence Allen (geologist) 1997 978-0-19-507827-5 Oxford University Press 476 Further reading DuRoss C. B. Bunds M. P. Gold R. D. Briggs R. W. Reitman N. G. Personius S. F. Toké N. A. Variable normal-fault rupture behavior, northern Lost River fault zone, Idaho, USA Geosphere 15 6 2019 1553-040X 10.1130/ges02096.1 1869–1892 210279291 free 2019Geosp..15.1869D 10.1785/0120030122 2004BuSSA..94..828P Stress Triggering of Conjugate Normal Faulting: Late Aftershocks of the 1983 Ms 7.3 Borah Peak, Idaho, Earthquake 2004 Payne S. J. Bulletin of the Seismological Society of America 94 3 828–844 10.3133/ofr84166 Intensity survey of the Borah Peak, Idaho, earthquake of October 28, 1983 Open-File Report 1984 Reagor Glen Baldwin F.W. free 10.3133/ofr84297 Preliminary isoseismal map and intensity distribution for the Borah Peak, Idaho, earthquake of October 28, 1983 Open-File Report 1984 Stover C.W. free Suzette M. Jackson, John Boatwright; Strong ground motion in the 1983 Borah Peak, Idaho, earthquake and its aftershocks. Bulletin of the Seismological Society of America ; 77 (3): 724–738. 10.1193/1.1585303 The Borah Peak, Idaho Earthquake of October 28, 1983—Liquefaction 1985 Youd T. L. T. Leslie Youd Harp E. L. Keefer D. K. Wilson R. C. Earthquake Spectra 2 1 71–89 1985EarSp...2...71Y 131701702 External links Borah Peak earthquake – Idaho Geological Survey M 6.9 – southern Idaho – United States Geological Survey Two children die as quake hits northwest and Canada – The New York Times 567352 Borah Peak Earthquake, 1983 Category:Earthquakes in the United States Category:Natural disasters in Idaho Category:1983 in Idaho Borah Peak earthquake Borah Peak earthquake