Publications
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Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: January 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: January 1986
No abstract available.
Authors
John B. Townshend, J.E. Papp, H.K. Rex, L.Y. Torrence, P.A. Franklin
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1986 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: February 1986
No abstract available.
Authors
John B. Townshend, J.E. Papp, H.K. Rex, L.Y. Torrence, P.A. Franklin
An interpretation of induced electric currents in long pipelines caused by natural geomagnetic sources of the upper atmosphere An interpretation of induced electric currents in long pipelines caused by natural geomagnetic sources of the upper atmosphere
Electric currents in long pipelines can contribute to corrosion effects that limit the pipe's lifetime. One cause of such electric currents is the geomagnetic field variations that have sources in the Earth's upper atmosphere. Knowledge of the general behavior of the sources allows a prediction of the occurrence times, favorable locations for the pipeline effects, and long-term...
Authors
W.H. Campbell
PERSPECTIVE ON LANDSLIDE DAMS. PERSPECTIVE ON LANDSLIDE DAMS.
The most common types of mass movements that form landslide dams are rock and soil slumps and slides; mud, debris, and earth flows: and rock and debris avalanches. The most common initiation mechanisms for dam-forming landslides are excessive rainfall and snow melt, and earthquakes. Most landslide dams are remarkable short-lived. In a sample of 63 documented cases, 22 percent of the...
Authors
Robert L. Schuster, John E. Costa
Seismic measurements of the internal properties of fault zones Seismic measurements of the internal properties of fault zones
The internal properties within and adjacent to fault zones are reviewed, principally on the basis of laboratory, borehole, and seismic refraction and reflection data. The deformation of rocks by faulting ranges from intragrain microcracking to severe alteration. Saturated microcracked and mildly fractured rocks do not exhibit a significant reduction in velocity, but, from borehole...
Authors
Walter D. Mooney, A. Ginzburg
Economic Losses and Fatalities Due to Landslides Economic Losses and Fatalities Due to Landslides
Annual losses in the United States, Japan, Italy, and India have been estimated at 1 billion or more each. During the period 1971-74, nearly 600 people per year were killed by landslides worldwide; about 90 percent of these deaths occurred in the Circum-Pacific region. From 1967-82, 150 people per year died in Japan as a result of slope failures. In the United States, the number of...
Authors
Robert L. Schuster, Robert W. Fleming
Some Techniques for Reducing Landslide Hazards Some Techniques for Reducing Landslide Hazards
Many techniques are available for reducing landslide hazards; 27 are described in this paper. Prerequisites for the successful use of these techniques are hazard information understandable to nongeologists and adequate communication of this information to those who will, or are required to, use it. It is concluded that certain factors needed to ensure the lasting effectiveness of these...
Authors
William J. Kockelman
Comments on 'Remarks on the secular change in the energy density spectrum of the geomagnetic field' by Joachim Meyer. Comments on 'Remarks on the secular change in the energy density spectrum of the geomagnetic field' by Joachim Meyer.
Meyer has discussed only the Rn aspect of the Alldredge (1984) paper he is criticising. He has ignored the pictorial demonstration of the need for higher harmonics to properly describe the secular variation field than the main field as demonstrated. This more or less independent demonstration supports the general conclusion of that paper.
Authors
L.R. Alldredge
Report on recommended list of structures for seismic instrumentation in southeastern United States Report on recommended list of structures for seismic instrumentation in southeastern United States
No abstract available.
Authors
Joyce B. Bagwell, Mehmet Çelebi, R. Elling, Charles Lindbergh, R.P. Maley, R. Pool, J. Radziminski, C. Simmons, D. Smits, P. Sparks, Pradeep Talwani
Map showing the status of landslide inventory and susceptibility mapping in California Map showing the status of landslide inventory and susceptibility mapping in California
No abstract available.
Authors
Fred Taylor, E. E. Brabb
Landslides Landslides
The slopes above streams and rivers are subjected to a variety of processes that cause them to recede and retreat from the river or stream channel. These processes, collectively called mass wasting, can be classified according to rapidity of movement and according to the type of materials that are transported. Gravity is the force behind all such downslope movement. Factors that enable...
Authors