Publications
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Lateral trapping of sediment in partially mixed estuary
No abstract available.
Authors
W. R. Geyer, R. P. Signell, G. C. Kineke
Reply to comment by R. Anderson on "Uranium-series disequilibrium, sedimentation, diatom frustules, and paleoclimate change in Lake Baikal"
No abstract available.
Authors
D. N. Edgington, J. A. Robbins, S.M. Colman, K. A. Orlandini, M. P. Gustin, J. V. Klump, L. Z. Granina
Review of electric and magnetic fields accompanying seismic and volcanic activity
New observations of magnetic, electric and electromagnetic field variations, possibly related to recent volcanic and seismic events, have been obtained on Mt. Unzen in Japan, Reunion Island in Indian Ocean, the Long Valley volcanic caldera in California, and for faults in China and Russia, California and several other locations. For volcanic events, contributions from different physical processes
Authors
M.J.S. Johnston
Population analysis of faint galaxies with mixture modeling
We investigate the use of spectral mixture modeling to decompose the integrated spectra of several galaxies. This technique uses a linear combination of template spectra to model over 93% of the variance in Kennicutt's sample of galaxy spectra. One result of our model is a stellar population parameter for each galaxy, which correlates with both star formation rate and the population's mass-to-ligh
Authors
Timothy N. Titus, Earl J. Spillar, Paul Johnson
Quaternary geology of Contra Costa County, and surrounding parts of Alameda, Marin, Sonoma, Solano, Sacramento, and San Joaquin counties, California: a digital database
No abstract available.
Authors
E. J. Helley, R. W. Graymer
Preliminary evaluation of the landslide potential in Capulin Canyon following the Dome fire, Bandelier National Monument, New Mexico
No abstract available.
Authors
S.H. Cannon, W. L. Ellis
Radar reflectivities of plausible Titan surfaces
We consider plausible reflectivity ranges for candidate Titan surfaces, with application to radar altimeter investigations on both the Cassini Orbiter and Huygens Probe. The appropriate measure of surface scattering is the specific backscatter cross-section at normal incidence or, for smooth surfaces, the specific backscatter averaged over the sensitivity of the altimeter beam pattern. A clean eth
Authors
Randolph L. Kirk, J. I. Lunine
Temperature, snowmelt, and the onset of spring season landslides in the central Rocky Mountains
Snow meltwater (snowmelt) that seeps into the subsurface is a major factor contributing to the development of landslides during the spring in mountainous areas of the Rocky Mountain region. An examination of historical temperature data in relation to spring season landslide occurrences reveals an association between the landslide events and intervals of rising temperatures that accelerate the prod
Authors
Alan F. Chleborad
The Coastal and Marine Geology Program of the U.S. Geological Survey
Nearly half of all Americans live within
an hour's drive of an ocean, the Gulf of
Mexico, or the Great Lakes. The U.S.
coastal oceans are an economically vital
transportation, commercial and recreational
resource. They provide food, energy, and
minerals for the entire Nation: on a global
scale, they harbor critical habitat for
important animal and plant species.
Authors
S. Jeffress Williams
Composition of the crust in the Grenville and Appalachian Provinces of North America inferred from VP/VS ratios
We use the ratios between P and S wave velocities (VP/VS), derived from seismic refraction data, to infer the composition of the crust in the Grenville and the Appalachian Provinces of North America. The crust exhibits VP/VS increasing with depth from 1.64 to 1.84; there is a clear distinction between the Grenville Province (average VP/VS=1.81) and the Appalachian Province (average VP/VS=1.73) whi
Authors
G. Musacchio, Walter D. Mooney, James H. Luetgert, Nikolas I. Christensen
The variability of PSV response spectra across a dense array deployed during the Northridge aftershock sequence
This study addresses the variability of pseudo-velocity response spectra across an array deployed on stiff soil in the San Fernando Valley during the Northridge (Mw 6.7) aftershock sequence. The separation between stations ranged from 0.5 to 5 km, and the aftershock magnitudes ranged from 2.3 to 4.0. We find that 95-percent of observed response spectra are within a factor of 1.9 to 2.6 of the netw
Authors
Edward H. Field, Susan E. Hough
Water-level changes in response to the 20 December 1994 earthquake near Parkfield, California
We analyze co-seismic changes of water level in nine wells near Parkfield, California, produced by an MD 4.7 earthquake on 20 December 1994 in order to test the hypothesis that co-seismic water-level changes are proportional to co-seismic volumetric strain. For each well, a quantitative relationship between water level and volumetric strain can be inferred from water-level fluctuations due to eart
Authors
Eddie Quilty, Evelyn A. Roeloffs