Research Article| March 01, 1978 Fault movement (afterslip) following the Guatemala earthquake of February 4, 1976 R. C. Bucknam; R. C. Bucknam 1U.S. Geological Survey, Stop 966, Denver Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar George Plafker; George Plafker 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar R. V. Sharp R. V. Sharp 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Author and Article Information R. C. Bucknam 1U.S. Geological Survey, Stop 966, Denver Federal Center, Denver, Colorado 80225 George Plafker 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 R. V. Sharp 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1978) 6 (3): 170–173. https://doi.org/10.1130/0091-7613(1978)6<170:FMAFTG>2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation R. C. Bucknam, George Plafker, R. V. Sharp; Fault movement (afterslip) following the Guatemala earthquake of February 4, 1976. Geology 1978;; 6 (3): 170–173. doi: https://doi.org/10.1130/0091-7613(1978)6<170:FMAFTG>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 Field studies of surface faulting associated with the Guatemala earthquake of February 4, 1976, have documented the occurrence of afterslip at seven locations along the 230 km of surface rupture. The total displacement across the fault as measured in April 1976 averaged 110 cm. Displacement at one location increased from 60 cm on February 8, 1976, to 91 cm on October 6, 1977. Afterslip time histories determined at three sites show the afterslip to be proportional to the logarithm of time since the earthquake, and that the rate of afterslip is inversely related to the amount of displacement at a site. The regular variation in total slip and afterslip along about 50 km of the fault trace suggests that the afterslip is not controlled by local, near-surface geologic factors such as alluvial cover. 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.