Publications
Filter Total Items: 7240
Predicted liquefaction in the greater Oakland area and northern Santa Clara Valley during a repeat of the 1868 Hayward Fault (M6.7-7.0) earthquake
Probabilities of surface manifestations of liquefaction due to a repeat of the 1868 (M6.7-7.0) earthquake on the southern segment of the Hayward Fault were calculated for two areas along the margin of San Francisco Bay, California: greater Oakland and the northern Santa Clara Valley. Liquefaction is predicted to be more common in the greater Oakland area than in the northern Santa Clara Valley owi
Authors
Thomas L. Holzer, Thomas E. Noce, Michael J. Bennett
Seismotectonics and fault structure of the California Central Coast
I present and interpret new earthquake relocations and focal mechanisms for the California Central Coast. The relocations improve upon catalog locations by using 3D seismic velocity models to account for lateral variations in structure and by using relative arrival times from waveform cross-correlation and double-difference methods to image seismicity features more sharply. Focal mechanisms are co
Authors
Jeanne L. Hardebeck
Archive of side scan sonar and swath bathymetry data collected during USGS cruise 10CCT01 offshore of Cat Island, Gulf Islands National Seashore, Mississippi, March 2010
In March of 2010, the U.S. Geological Survey (USGS) conducted geophysical surveys east of Cat Island, Mississippi (fig. 1). The efforts were part of the USGS Gulf of Mexico Science Coordination partnership with the U.S. Army Corps of Engineers (USACE) to assist the Mississippi Coastal Improvements Program (MsCIP) and the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazards Susceptibility Pr
Authors
Nancy T. DeWitt, James G. Flocks, William R. Pfeiffer, Dana S. Wiese
Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop
The Northern Walker Lane comprises a complex network of active faults in northwestern Nevada and northeastern California bound on the west by the Sierra Nevada and on the east by the extensional Basin and Range Province. Because deformation is distributed across sets of discontinuous faults, it is particularly challenging to integrate geologic and geodetic data in the NWL to assess the region's se
Authors
Richard W. Briggs, William C. Hammond
Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone
Determining the rock properties that permit or impede the growth of compaction bands in sedimentary sequences is a critical problem of importance to studies of strain localization and characterization of subsurface geologic reservoirs. We determine the porosity and average grain size of a sequence of stratigraphic layers of Navajo Sandstone that are then used in a critical state model to infer pla
Authors
Richard A. Schultz, Chris H. Okubo, Haakon Fossen
Pancam and Microscopic Imager observations of dust on the Spirit Rover: Cleaning events, spectral properties, and aggregates
This work describes dust deposits on the Spirit Rover over 2000 sols through examination of Pancam and Microscopic Imager observations of specific locations on the rover body, including portions of the solar array, Pancam and Mini-TES calibration targets, and the magnets. This data set reveals the three "cleaning events" experienced by Spirit to date, the spectral properties of dust, and the tende
Authors
Alicia F. Vaughan, Jeffrey R. Johnson, Kenneth E. Herkenhoff, Robert Sullivan, Geoffrey A. Landis, Walter Goetz, Morten B. Madsen
Impact craters on Titan
Five certain impact craters and 44 additional nearly certain and probable ones have been identified on the 22% of Titan's surface imaged by Cassini's high-resolution radar through December 2007. The certain craters have morphologies similar to impact craters on rocky planets, as well as two with radar bright, jagged rims. The less certain craters often appear to be eroded versions of the certain o
Authors
Charles A. Wood, Ralph Lorenz, Randy Kirk, Rosaly Lopes, Karl Mitchell, Ellen Stofan
High tsunami frequency as a result of combined strike-slip faulting and coastal landslides
Earthquakes on strike-slip faults can produce devastating natural hazards. However, because they consist predominantly of lateral motion, these faults are rarely associated with significant uplift or tsunami generation. And although submarine slides can generate tsunami, only a few per cent of all tsunami are believed to be triggered in this way. The 12 January Mw 7.0 Haiti earthquake exhibited pr
Authors
Matthew J. Hornbach, Nicole Braudy, Richard W. Briggs, Marie-Helene Cormier, Marcy B. Davis, John B. Diebold, Nicole Dieudonne, Roby Douilly, Cliff Frohlich, Sean P.S. Gulick, Harold E. Johnson, Paul Mann, Cecilia McHugh, Katherine Ryan-Mishkin, Carol S. Prentice, Leonardo Seeber, Christopher C. Sorlien, Michael S. Steckler, Steeve Julien Symithe, Frederick W. Taylor, John Templeton
Distribution and interplay of geologic processes on Titan from Cassini radar data
The Cassini Titan Radar Mapper is providing an unprecedented view of Titan’s surface geology. Here we use Synthetic Aperture Radar (SAR) image swaths (Ta–T30) obtained from October 2004 to December 2007 to infer the geologic processes that have shaped Titan’s surface. These SAR swaths cover about 20% of the surface, at a spatial resolution ranging from ∼350 m to ∼2 km. The SAR data are distributed
Authors
R. M. C. Lopes, E. R. Stofan, R. Peckyno, J. Radebaugh, K. L. Mitchell, Giuseppe Mitri, C. A. Wood, R. L. Kirk, S. D. Wall, J. I. Lunine, A. Hayes, R. Lorenz, Tom Farr, L. Wye, J. Craig, R. J. Ollerenshaw, M. Janssen, A. LeGall, F. Paganelli, R. West, B. Stiles, P. Callahan, Y. Anderson, P. Valora, L. Soderblom
An empirical model for global earthquake fatality estimation
We analyzed mortality rates of earthquakes worldwide and developed a country/region-specific empirical model for earthquake fatality estimation within the U.S. Geological Survey's Prompt Assessment of Global Earthquakes for Response (PAGER) system. The earthquake fatality rate is defined as total killed divided by total population exposed at specific shaking intensity level. The total fatalities f
Authors
Kishor Jaiswal, David Wald
Comment on "Near-surface location, geometry, and velocities of the Santa Monica fault zone, Los Angeles, California"
No abstract available.
Authors
Thomas L. Pratt, James F. Dolan
Landslide deposit boundaries for the Little North Santiam River Basin, Oregon
This layer is an inventory of existing landslides deposits in the Little North Santiam River Basin, Oregon (2009). Each landslide deposit shown on this map has been classified according to a number of specific characteristics identified at the time recorded in the GIS database. The classification scheme was developed by the Oregon Department of Geology and Mineral Industries (Burns and Madin, 2009
Authors
Steven Sobieszczyk