Publications
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Analysis of geomagnetic secular variation during 1980-1985 and 1985- 1990, and geomagnetic models proposed for the 1991 revision of the International Geomagnetic Reference Field Analysis of geomagnetic secular variation during 1980-1985 and 1985- 1990, and geomagnetic models proposed for the 1991 revision of the International Geomagnetic Reference Field
The secular variation of the main geomagnetic field during the periods 1980-1985 and 1985-1990 was analyzed in terms of spherical harmonics up to the eighth degree and order. Data from worldwide magnetic observatories and the Navy's Project MAGNET aerial surveys were used. The resulting pair of secular-variation models was used to update the Definitive Geomagnetic Reference Field (DGRF)...
Authors
N.W. Peddie
The directory of the World Landslide Inventory The directory of the World Landslide Inventory
No abstract available.
Authors
William M. Brown, D.M. Cruden, Judith S. Denison
Digital elevation models for Slumgullion landslide, Hinsdale County, Colorado based on 1985 and 1990 aerial photography Digital elevation models for Slumgullion landslide, Hinsdale County, Colorado based on 1985 and 1990 aerial photography
No abstract available.
Authors
Philip S. Powers, David J. Varnes, William Z. Savage
Faulting, structural damage, liquefaction, and landslides from the Luzon, Philippines earthquake of July 16, 1990; slide set and bibliography Faulting, structural damage, liquefaction, and landslides from the Luzon, Philippines earthquake of July 16, 1990; slide set and bibliography
No abstract available.
Authors
Gerald F. Wieczorek, Christopher G. Newhall, Leif G. Wennerberg
Digital elevation models for Slumgullion landslide, Hinsdale County, Colorado based on 1985 and 1990 aerial photography Digital elevation models for Slumgullion landslide, Hinsdale County, Colorado based on 1985 and 1990 aerial photography
No abstract available.
Authors
Philip S. Powers, David J. Varnes, William Z. Savage
Preliminary geomagnetic data, College Observatory, Fairbanks Preliminary geomagnetic data, College Observatory, Fairbanks
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Hazards of geomagnetic storms Hazards of geomagnetic storms
Geomagnetic storms are large and sometimes rapid fluctuations in the Earth's magnetic field that are related to disturbances on the Sun's surface. Although it is not widely recognized, these transient magnetic disturbances can be a significant hazard to people and property. Many of us know that the intensity of the auroral lights increases during magnetic storms, but few people realize...
Authors
D.C. Herzog
Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field
The 1991 revision of the International Geomagnetic Reference Field (IGRF) comprises a definitive main-field model for 1985.0, amain-field model for 1990.0, and a forecast secular-variation model for the period 1990-1995. The five 1985.0 main-field models and five 1990.0 main-field models that were proposed have been evaluated by comparing them with one another, with magnetic observatory...
Authors
N.W. Peddie
An evaluation of installation methods for STS-1 seismometers An evaluation of installation methods for STS-1 seismometers
This report documents the results of a series of experiments conducted by the authors at the Albuquerque Seismological Laboratory (ASl) during the spring and summer of 1991; the object of these experiments was to obtain and document quantitative performance comparisons of three methods of installing STS-1 seismometers. Historically, ASL has installed STS-1 sensors by cementing their...
Authors
L. Gary Holcomb, Charles R. Hutt
Geology, hydrology and mechanics of the Alani-Paty Landslide, Manoa Valley, Oahu, Hawaii Geology, hydrology and mechanics of the Alani-Paty Landslide, Manoa Valley, Oahu, Hawaii
No abstract available.
Authors
R.L. Baum, M.E. Reid
Preliminary geomagnetic data, College Observatory, Fairbanks Preliminary geomagnetic data, College Observatory, Fairbanks
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Quiet geomagnetic field representation for all days and latitudes Quiet geomagnetic field representation for all days and latitudes
This paper describes a technique for obtaining the quiet-time geomagnetic field variation expected for all days of the year and distribution of latitudes from a limited set of selected quiet days within a year at a discrete set of locations. We used a data set of observatories operated by Indian and USSR scientists in 1976 and 1977 near 75°E longitude as illustration. Our method relies...
Authors
W.H. Campbell, E.R. Schiffmacher, B.R. Arora