Publications
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Data for Quaternary faults in western Montana Data for Quaternary faults in western Montana
The "World Map of Major Active Faults" Task Group is compiling published fault data, developing a digital database of the fault data, and preparing a series of maps for the United States and other countries in the western Hemisphere. The data is intended to portray the locations, ages, and activity rates of major earthquake-related features such as faults, folds, and liquefaction...
Authors
Kathleen M. Haller, Richard L. Dart, Michael N. Machette, Michael C. Stickney
Two-phase debris-flow across 3-D terrain: model predictions and experimental tests Two-phase debris-flow across 3-D terrain: model predictions and experimental tests
No abstract available.
Authors
R.M. Iverson, R.P. Denlinger, R.G. LaHusen, M. Logan
Fully developed snout profiles of noncohesive debris-flows with internal friction Fully developed snout profiles of noncohesive debris-flows with internal friction
No abstract available.
Authors
Cheng-lung Chen, Chi-Hai Ling
The derivation of World Magnetic Model 2000 The derivation of World Magnetic Model 2000
This report contains a detailed summary of the data used, the modelling techniques employed and the results obtained in the production of the World Magnetic Model 2000. This model is designed for use in air and sea navigation systems and is valid till 2005.0. The derivation of World Magnetic Model 2000 has been the joint responsibility of the British Geological Survey (BGS) and the...
Authors
Susan Macmillan, John M. Quinn
Methane hydrate dissociation rates at 0.1 MPa and temperatures above 272 K Methane hydrate dissociation rates at 0.1 MPa and temperatures above 272 K
We performed rapid depressurization experiments on methane hydrate under isothermal conditions above 272 K to determine the amount and rate of methane evolution. Sample temperatures rapidly drop below 273 K and stabilize near 272.5 K during dissociation. This thermal anomaly and the persistence of methane hydrate are consistent with the reported recovery of partially dissociated methane...
Authors
S. Circone, Laura A. Stern, Stephen H. Kirby, John C. Pinkston, William B Durham
Duration of sedimentation of Creede Formation from 40Ar/39Ar ages Duration of sedimentation of Creede Formation from 40Ar/39Ar ages
The Oligocene Creede Formation was deposited in the moat of the Creede caldera, which formed as a result of eruption of ythe Snowshoe Mountains Tuff. The Creede Formation in the two moat drill holes contains ash layers that are considered fallout tuffs derived from Fisher Dacite volcanoes that were erupting during accumulation of the Creede Formation. The duration of sedimentation of the...
Authors
Marvin A. Lanphere
Landslides and tsunamis Landslides and tsunamis
The study of tsunamis has been shifting away from theoretical modeling of tsunami source, wave propagation and runup toward multidisciplinary investigations, with an emphasis on field studies. This collection of papers highlights the many approaches being utilized to study landslides and tsunamis.
Authors
Christopher F. Waythomas, Alastair G. Dawson
Volcanism and ice interactions on Earth and Mars Volcanism and ice interactions on Earth and Mars
Volcano/ice interactions produce meltwater. Meltwater can enter the groundwater cycle and under the influence of hydrothermal systems, it can be later discharged to form channels and valleys or cycled upward to melt permafrost. Water or ice-saturated ground can erupt into phreatic craters when covered by lava. Violent mixing of meltwater and volcanic material and rapid release can...
Authors
Mary G. Chapman, Carlton C. Allen, Magnus T. Gudmundsson, Virginia C. Gulick, Sveinn P. Jakobsson, Baerbel K. Lucchitta, Ian P. Skilling, Richard B. Waitt
Preliminary map showing landslide densities, mean recurrence intervals, and exceedance probabilities as determined from historic records, Seattle, Washington Preliminary map showing landslide densities, mean recurrence intervals, and exceedance probabilities as determined from historic records, Seattle, Washington
No abstract available.
Authors
J. A. Coe, J. A. Michael, R. A. Crovelli, W. Z. Savage
SMSIM--Fortran programs for simulating ground motions from earthquakes: Version 2.0.--a revision of OFR 96-80-A SMSIM--Fortran programs for simulating ground motions from earthquakes: Version 2.0.--a revision of OFR 96-80-A
A simple and powerful method for simulating ground motions is based on the assumption that the amplitude of ground motion at a site can be specified in a deterministic way, with a random phase spectrum modified such that the motion is distributed over a duration related to the earthquake magnitude and to distance from the source. This method of simulating ground motions often goes by the...
Authors
David M. Boore
Geotechnical properties for landslide-prone Seattle; area glacial deposits Geotechnical properties for landslide-prone Seattle; area glacial deposits
No abstract available.
Authors
William Z. Savage, Meghan M. Morrissey, Rex L. Baum