Publications
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Assessment and prediction of debris-flow hazards Assessment and prediction of debris-flow hazards
Study of debris-flow geomorphology and initiation mechanism has led to better understanding of debris-flow processes. This paper reviews how this understanding is used in current techniques for assessment and prediction of debris-flow hazards.
Authors
Gerald F. Wieczorek
Water fact sheet, history of landslides and debris flows at Mount Rainier Water fact sheet, history of landslides and debris flows at Mount Rainier
Many landslides and debris flows have originated from Mount Rainier since the retreat of glaciers from Puget Sound about 10,000 years ago. The recurrent instability is due to several factors--height of the steep-sided volcanic cone, frequent volcanic activity, continuous weakening of rock by steam and hot, chemical-laden water, and exposure of unstable areas as the mountains glaciers...
Authors
K. M. Scott, J.W. Vallance
Antarctic glacier-tongue velocities from Landsat images: First results Antarctic glacier-tongue velocities from Landsat images: First results
We measured the velocities of six glacier tongues and a few tongues within ice shelves distributed around the Antarctic coastline by determining the displacement of crevasse patterns seen on sequential Landsat images. The velocities range from less than 0.2 km a−1 for East Antarctic ice-shelf tongues to more than 2.5 km a−1 for the Thwaites Glacier Tongue. All glacier tongues show...
Authors
Baerbel K. Lucchitta, K.F. Mullins, A.L. Allison, Jane G. Ferrigno
Description, origin, and implications of a newly identified Slumgullion landslide deposit, San Juan Mountains, southwestern Colorado Description, origin, and implications of a newly identified Slumgullion landslide deposit, San Juan Mountains, southwestern Colorado
No abstract available.
Authors
A.F. Chleborad
Volcanic activity in Alaska: September 1991-September 1992 Volcanic activity in Alaska: September 1991-September 1992
More than 40 historically active volcanic centers, each consisting of one or more volcanoes, are located on the Alaska Peninsula and Aleutian Islands (see map on next page). On average, at least one of these volcanoes erupts each year.
Authors
Game McGimsey
The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations The Loma Prieta, California, earthquake of October 17, 1989: Preseismic observations
The October 17, 1989, Loma Prieta, Calif., Ms=7.1 earthquake provided the first opportunity in the history of fault monitoring in the United States to gather multidisciplinary preearthquake data in the near field of an M=7 earthquake. The data obtained include observations on seismicity, continuous strain, long-term ground displacement, magnetic field, and hydrology. The papers in this...
Authors
Malcolm J. S. Johnston, Jean A. Olson, David P. Hill, Anthony C. Fraser-Smith, Arman Bernardi, Robert A. Helliwell, Paul R. McGill, O.G. Villard, Robert J. Mueller, Randall A. White, William L. Ellsworth, Evelyn A. Roeloffs, Alan T. Linde, M. T. Gladwin, R. L. Gwyther, R.H.G. Hart, Michael Lisowski, James C. Savage, William H. Prescott, Jerry L. Svarc, Mark Hunter Murray, P.G. Silver, N. J. Valette-Silver, Olga Kolbek
Age and origin of fluvial terraces in the central Coast Range, western Oregon Age and origin of fluvial terraces in the central Coast Range, western Oregon
No abstract available.
Authors
Stephen F. Personius
Preventing volcanic catastrophe; the U.S. International Volcano Disaster Assistance Program Preventing volcanic catastrophe; the U.S. International Volcano Disaster Assistance Program
When the seismograph began to record the violent earth-shaking caused by yet another eruption of the Nevado del Ruiz volcano in Colombia, no one thought that a few hours later more than 23,000 people would be dead, killed by lahars (volcanic debris flows) in towns and villages several tens of kilometers away from the volcano. Before the fatal eruption the volcano was being monitored by...
Authors
J.W. Ewert, T.L. Murray, A. B. Lockhart, C.D. Miller
Differentiation of debris-flow and flash-flood deposits: implications for paleoflood investigations Differentiation of debris-flow and flash-flood deposits: implications for paleoflood investigations
Debris flows and flash floods are common geomorphic processes in the Colorado Rocky Mountain Front Range and foothills. Usually, debris flows and flash floods are associated with excess summer rainfall or snowmelt, in areas were unconsolidated surficial deposits are relatively thick and slopes are steep. In the Front Range and foothills, flash flooding is limited to areas below about...
Authors
Christopher F. Waythomas, Robert D. Jarrett
Mapping debris-flow hazard in Honolulu using a DEM Mapping debris-flow hazard in Honolulu using a DEM
A method for mapping hazard posed by debris flows has been developed and applied to an area near Honolulu, Hawaii. The method uses studies of past debris flows to characterize sites of initiation, volume at initiation, and volume-change behavior during flow. Digital simulations of debris flows based on these characteristics are then routed through a digital elevation model (DEM) to...
Authors
Stephen D. Ellen, Robert K. Mark