Publications
Filter Total Items: 7494
Earthquakes, minerals, and me with the USGS, 1942-1995 Earthquakes, minerals, and me with the USGS, 1942-1995
No abstract available.
Authors
Robert E. Wallace, Stanley Scott
Scaling laws for natural disaster fatalities Scaling laws for natural disaster fatalities
No abstract available.
Authors
Stuart P. Nishenko, Christopher C. Barton
Ground-truth studies of west coast and Gulf of Mexico submarine fans Ground-truth studies of west coast and Gulf of Mexico submarine fans
No abstract available.
Authors
Homa J. Lee, Robert E. Kayen, Brian D. Edwards, Michael E. Field, James V. Gardner, William C. Schwab, David C. Twichell
Integration of orthophotographic and sidescan sonar imagery: an example from Lake Garda, Italy Integration of orthophotographic and sidescan sonar imagery: an example from Lake Garda, Italy
Digital orthophotos of Lake Garda basin area are available at the scale of up to 1:10,000 from a 1994 high altitude (average scale of 1:75,000) air photo coverage of Italy collected with an RC30 camera and Panatomic film. In October 1994 the lake bed was surveyed by USGS and CISIG personnel using a SIS 1000 Sea-Floor Mapping System. Subsystems of the SIS-1000 include high resolution...
Authors
Giuseppe Gentili, David C. Twichell, Bill Schwab
Geology of the United States' seafloor: the view from GLORIA Geology of the United States' seafloor: the view from GLORIA
No abstract available.
Authors
James V. Gardner, Michael E. Field, David C. Twichell
Reflected seismic waves and their effect on strong shaking during the 1989 Loma Prieta, California, earthquake Reflected seismic waves and their effect on strong shaking during the 1989 Loma Prieta, California, earthquake
Our data indicate that critical and postcritical reflections from crustal layers and the Moho produced increased shaking at discrete distances along the San Francisco Peninsula during the 1989 Loma Prieta earthquake. These reflections may have produced an increase in amplitude that is as much as 10 times greater than that of the direct arrival. Peak amplitude-distance patterns measured...
Authors
Rufus D. Catchings, W.M. Kohler
Airborne hunt for faults in the Portland-Vancouver area Airborne hunt for faults in the Portland-Vancouver area
Geologic hazards in the Portland-Vancouver area include faults entirely hidden by river sediments, vegetation, and urban development. A recent aerial geophysical survey revealed patterns in the Earth's magnetic field that confirm the existence of a previously suspected fault running through Portland. It also indicated that this fault may pose a significant seismic threat. This discovery...
Authors
Richard J. Blakely, Ray E. Wells, Thomas S. Yelin, Peter H. Stauffer, James W. Hendley
Comparison and contrast of processes of soil formation in the San Timoteo Badlands with chronosequences in California Comparison and contrast of processes of soil formation in the San Timoteo Badlands with chronosequences in California
The degree of soil development associated with geomorphic surfaces in the San Timoteo Badlands area (STB), California allows correlation of the surfaces. Soil development indices, based on field descriptions and laboratory analysis, provide a basis for comparison of these soils to each other and to dated soil chronosequences at Cajon Pass, Merced, and Anza, California. The soils in this...
Authors
Katherine J. Kendrick, Leslie D. McFadden
Preliminary estimates of ground-motion amplification for the Northridge and Hyogo-ken Earthquakes of January 17, 1994 and 1995 Preliminary estimates of ground-motion amplification for the Northridge and Hyogo-ken Earthquakes of January 17, 1994 and 1995
No abstract available.
Authors
Roger D. Borcherdt
Direct temperature measurements of deposits, Mount St. Helens, Washington, 1980-1981 Direct temperature measurements of deposits, Mount St. Helens, Washington, 1980-1981
A program of temperature studies of the eruptive products of Mount St. Helens was established May 20, 1980, 2 days after the catastrophic eruption of May 18. Temperature-depth profiles were measured by thermocouple to determine the emplacement temperatures of deposits of the debris avalanche and blast of May 18 and of deposits of the pyroclastic flows of May 18, May 25, June 12, July 22...
Authors
Norman G. Banks, Richard P. Hoblitt
Descriptions, photographs, and coordinates for Global Positioning System stations at Aniakchak Crater, Alaska Descriptions, photographs, and coordinates for Global Positioning System stations at Aniakchak Crater, Alaska
No abstract available.
Authors
K.M. Yamashita, E.Y. Iwatsubo, J.J. Dvorak
Global volcanic earthquake swarm database 1979-1989 Global volcanic earthquake swarm database 1979-1989
Earthquake swarms are pervasive at volcanoes, but have seldom been studied systematically. Most swarms that are described in the literature are those that occurred in association with eruptions; indeed, earthquake swarms are the most reliable method of forecasting eruptions. For the purpose of this report, a swarm is defined as many earthquakes of the same size occurring in a small...
Authors
J.P. Benoit, S.R. McNutt