Surface faulting accompanying the Borah Peak earthquake, central Idaho

Research Article| November 01, 1984 Surface faulting accompanying the Borah Peak earthquake, central Idaho Anthony J. Crone; Anthony J. Crone 1U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Michael N. Machette Michael N. Machette 1U.S. Geological Survey, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Author and Article Information Anthony J. Crone 1U.S. Geological Survey, Denver, Colorado 80225 Michael N. Machette 1U.S. Geological Survey, Denver, Colorado 80225 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (11): 664–667. https://doi.org/10.1130/0091-7613(1984)12<664:SFATBP>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Anthony J. Crone, Michael N. Machette; Surface faulting accompanying the Borah Peak earthquake, central Idaho. Geology 1984;; 12 (11): 664–667. doi: https://doi.org/10.1130/0091-7613(1984)12<664:SFATBP>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Ms 7.3 Borah Peak earthquake that struck central Idaho on October 28, 1983, was one of the strongest historic earthquakes in the Intermountain Seismic Belt. Much of the 34-km-long, northwest-trending zone of fault scarps and surface ruptures that formed during the earthquake follows Holocene and upper Pleistocene scarps of the Lost River fault. Throw along the new fault scarps averages 0.8 m, exceeds 1.0 m along 43% of their length, and attains a maximum of 2.7 m along the broad and complex zone of deformation in the southern section. The net slip was normal sinistral, averaging 17 cm lateral slip for 100 cm of dip slip. The preferred nodal plane from the focal mechanism strikes N22°W, dips 59°SW, and suggests a much larger component of strike slip than do the geologic data. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.