Victoria Langenheim
Vickie is a Research Geophysicist with the Geology, Minerals, Energy, and Geophysics Science Center
Science and Products
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An integrated geophysical approach for groundwater and seismic hazard management in Joshua Tree National Park, southern California An integrated geophysical approach for groundwater and seismic hazard management in Joshua Tree National Park, southern California
Two‐dimensional inversion of audiomagnetotelluric (AMT) sounding data define buried resistivity distributions that reflect subsurface geology and structure within the upper kilometer beneath Pleasant Valley, a 1–2 km‐deep pull‐apart basin in Joshua Tree National Park, southern California. The Park lies within the Eastern California Shear Zone just east of the San Andreas Fault, and is...
Authors
Darcy McPhee, Victoria E. Langenheim, Bruce A. Chuchel, Louise Pellerin
Geologic and Geophysical Framework of the Santa Rosa 7.5' Quadrangle, Sonoma County, California Geologic and Geophysical Framework of the Santa Rosa 7.5' Quadrangle, Sonoma County, California
The geologic and geophysical maps of Santa Rosa 7.5? quadrangle and accompanying structure sections portray the sedimentary and volcanic stratigraphy and crustal structure of the Santa Rosa 7.5? quadrangle and provide a context for interpreting the evolution of volcanism and active faulting in this region. The quadrangle is located in the California Coast Ranges north of San Francisco...
Authors
R. J. McLaughlin, V.E. Langenheim, A.M. Sarna-Wojcicki, R.J. Fleck, D.K. McPhee, C. W. Roberts, C.A. McCabe, Elmira Wan
Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California
This isostatic residual gravity map is part of an effort to map the three-dimensional distribution of rocks in Joshua Tree National Park, southern California. This map will serve as a basis for modeling the shape of basins beneath the Park and in adjacent valleys and also for determining the location and geometry of faults within the area. Local spatial variations in the Earth's gravity...
Authors
V.E. Langenheim, Shawn Biehler, D.K. McPhee, C.A. McCabe, J. T. Watt, M.L. Anderson, B. A. Chuchel, P. Stoffer
Relatively simple through-going fault planes at large-earthquake depth may be concealed by the surface complexity of strike-slip faults Relatively simple through-going fault planes at large-earthquake depth may be concealed by the surface complexity of strike-slip faults
At the surface, strike-slip fault stepovers, including abrupt fault bends, are typically regions of complex, often disconnected faults. This complexity has traditionally led geologists studying the hazard of active faults to consider such stepovers as important fault segment boundaries, and to give lower weight to earthquake scenarios that involve rupture through the stepover zone...
Authors
Russell W. Graymer, Victoria E. Langenheim, Robert W. Simpson, Robert C. Jachens, David A. Ponce
Pleistocene Brawley and Ocotillo Formations: Evidence for initial strike-slip deformation along the San Felipe and San Jacinto fault zonez, Southern California Pleistocene Brawley and Ocotillo Formations: Evidence for initial strike-slip deformation along the San Felipe and San Jacinto fault zonez, Southern California
We examine the Pleistocene tectonic reorganization of the Pacific-North American plate boundary in the Salton Trough of southern California with an integrated approach that includes basin analysis, magnetostratigraphy, and geologic mapping of upper Pliocene to Pleistocene sedimentary rocks in the San Felipe Hills. These deposits preserve the earliest sedimentary record of movement on the...
Authors
S.M. Kirby, S. U. Janecke, R.J. Dorsey, B.A. Housen, V.E. Langenheim, K. A. McDougall, A.N. Steeley
Three-dimensional P wave velocity model for the San Francisco Bay region, California Three-dimensional P wave velocity model for the San Francisco Bay region, California
[1] A new three-dimensional P wave velocity model for the greater San Francisco Bay region has been derived using the double-difference seismic tomography method, using data from about 5,500 chemical explosions or air gun blasts and approximately 6,000 earthquakes. The model region covers 140 km NE-SW by 240 km NW-SE, extending from 20 km south of Monterey to Santa Rosa and reaching from...
Authors
C.H. Thurber, T.M. Brocher, H. Zhang, V.E. Langenheim
Science and Products
Filter Total Items: 34
No Result Found
Filter Total Items: 189
An integrated geophysical approach for groundwater and seismic hazard management in Joshua Tree National Park, southern California An integrated geophysical approach for groundwater and seismic hazard management in Joshua Tree National Park, southern California
Two‐dimensional inversion of audiomagnetotelluric (AMT) sounding data define buried resistivity distributions that reflect subsurface geology and structure within the upper kilometer beneath Pleasant Valley, a 1–2 km‐deep pull‐apart basin in Joshua Tree National Park, southern California. The Park lies within the Eastern California Shear Zone just east of the San Andreas Fault, and is...
Authors
Darcy McPhee, Victoria E. Langenheim, Bruce A. Chuchel, Louise Pellerin
Geologic and Geophysical Framework of the Santa Rosa 7.5' Quadrangle, Sonoma County, California Geologic and Geophysical Framework of the Santa Rosa 7.5' Quadrangle, Sonoma County, California
The geologic and geophysical maps of Santa Rosa 7.5? quadrangle and accompanying structure sections portray the sedimentary and volcanic stratigraphy and crustal structure of the Santa Rosa 7.5? quadrangle and provide a context for interpreting the evolution of volcanism and active faulting in this region. The quadrangle is located in the California Coast Ranges north of San Francisco...
Authors
R. J. McLaughlin, V.E. Langenheim, A.M. Sarna-Wojcicki, R.J. Fleck, D.K. McPhee, C. W. Roberts, C.A. McCabe, Elmira Wan
Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California
This isostatic residual gravity map is part of an effort to map the three-dimensional distribution of rocks in Joshua Tree National Park, southern California. This map will serve as a basis for modeling the shape of basins beneath the Park and in adjacent valleys and also for determining the location and geometry of faults within the area. Local spatial variations in the Earth's gravity...
Authors
V.E. Langenheim, Shawn Biehler, D.K. McPhee, C.A. McCabe, J. T. Watt, M.L. Anderson, B. A. Chuchel, P. Stoffer
Relatively simple through-going fault planes at large-earthquake depth may be concealed by the surface complexity of strike-slip faults Relatively simple through-going fault planes at large-earthquake depth may be concealed by the surface complexity of strike-slip faults
At the surface, strike-slip fault stepovers, including abrupt fault bends, are typically regions of complex, often disconnected faults. This complexity has traditionally led geologists studying the hazard of active faults to consider such stepovers as important fault segment boundaries, and to give lower weight to earthquake scenarios that involve rupture through the stepover zone...
Authors
Russell W. Graymer, Victoria E. Langenheim, Robert W. Simpson, Robert C. Jachens, David A. Ponce
Pleistocene Brawley and Ocotillo Formations: Evidence for initial strike-slip deformation along the San Felipe and San Jacinto fault zonez, Southern California Pleistocene Brawley and Ocotillo Formations: Evidence for initial strike-slip deformation along the San Felipe and San Jacinto fault zonez, Southern California
We examine the Pleistocene tectonic reorganization of the Pacific-North American plate boundary in the Salton Trough of southern California with an integrated approach that includes basin analysis, magnetostratigraphy, and geologic mapping of upper Pliocene to Pleistocene sedimentary rocks in the San Felipe Hills. These deposits preserve the earliest sedimentary record of movement on the...
Authors
S.M. Kirby, S. U. Janecke, R.J. Dorsey, B.A. Housen, V.E. Langenheim, K. A. McDougall, A.N. Steeley
Three-dimensional P wave velocity model for the San Francisco Bay region, California Three-dimensional P wave velocity model for the San Francisco Bay region, California
[1] A new three-dimensional P wave velocity model for the greater San Francisco Bay region has been derived using the double-difference seismic tomography method, using data from about 5,500 chemical explosions or air gun blasts and approximately 6,000 earthquakes. The model region covers 140 km NE-SW by 240 km NW-SE, extending from 20 km south of Monterey to Santa Rosa and reaching from...
Authors
C.H. Thurber, T.M. Brocher, H. Zhang, V.E. Langenheim