Permeability changes associated with large earthquakes: An example from Loma Prieta, California

Research Article| March 01, 1992 Permeability changes associated with large earthquakes: An example from Loma Prieta, California Stuart Rojstaczer; Stuart Rojstaczer 1Department of Geology, Duke University, Durham, North Carolina 27706 Search for other works by this author on: GSW Google Scholar Stephen Wolf Stephen Wolf 2U.S. Geological Survey, M.S. 988, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Geology (1992) 20 (3): 211–214. https://doi.org/10.1130/0091-7613(1992)0202.3.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 Stuart Rojstaczer, Stephen Wolf; Permeability changes associated with large earthquakes: An example from Loma Prieta, California. Geology 1992;; 20 (3): 211–214. doi: https://doi.org/10.1130/0091-7613(1992)0202.3.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 Loma Prieta (California) earthquake (October 17, 1989; M 7.1) caused significant changes in the hydrology of the San Lorenzo and Pescadero drainage basins, northwest of the epicenter. Streamflow increased at most gauging stations within 15 min after the earthquake. Ionic concentrations and the calcite saturation index of the stream water also increased. Streamflow and solute concentrations decayed significantly over a period of several months following the earthquake. Ground-water levels in the highland parts of the basins were locally lowered by as much as 21 m within weeks to months after the earthquake. The spatial and temporal character of the hydrologic response suggests that the earthquake increased rock permeability and temporarily enhanced ground-water flow rates in the region. 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.