Crandall Canyon Mine Collapse, Utah: Case Example
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This page first made public: May 9, 2012
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Description and Teaching Materials
Students read a description of the event plus background information on room-and-pillar mining. They predict the orientation and type of fractures that could result in pillar failure, and they use a focal mechanism for the Crandall Canyon event to evaluate whether an earthquake caused the collapse or the collapse caused ground shaking. The focal mechanism is unlike any that they have seen before because it is not a double-couple solution; all first motions are down.Assignment for Crandall Canyon Mine Collapse case example (Microsoft Word 2007 (.docx) 564kB May9 12)
Teaching Notes and Tips
References and Resources
Pechmann, James C., Arbasz, Walter J., Pankow, Relu Burlacu, and McCarter, Michael K., 2008, Seismological report on the 6 August 2007 Crandall Canyon Mine collapse in Utah: Seismological Research Letters, v. 79, no. 5, p. 620-636.
Seismic Moment Tensor Report for the 06 Aug 2007, M3.9 Seismic event in central Utah: http://seismo.berkeley.edu/~peggy/Utah20070806.htm
Map of the Crandall Canyon Mine: http://unews.utah.edu/wp-content/uploads/crandall_map_aug_07.jpg
Crandall Canyon Mine Collapse FAQs: http://www.seis.utah.edu/MONRESEARCH/CM/cmFAQ.htm
Earthquakes within 3 km of the Mine: http://www.seis.utah.edu/MONRESEARCH/CM/cm_update.htm
Crandall Canyon Mine collapse update: http://www.seis.utah.edu/MONRESEARCH/CM/Aug6update.htm
Campoli, Alan A., Kertis, Carla A., and Goode, Claude, 1987, Coal mine bumps: five case studies in the eastern Unites States: USGS Information Circular 9149, 39 p.
Arabasz, W.J., Nava, S.J., McCarter, M.K., Pankow, K.L., Pechmann, J.C., Ake, J., and McGarr, A., 2005, Coal-mining seismicity and ground-shaking hazard: a case study in the Trail Mountain area, Emery County, Utah: Bulletin of the Seismological Society of America, v. 95, no,. 2, p. 18-30.