Publications
Filter Total Items: 2337
A model of geomagnetic secular variation for 1980-1983 A model of geomagnetic secular variation for 1980-1983
We developed an updated model of the secular variation of the main geomagnetic field during 1980 through 1983 based on annual mean values for that interval from 148 worldwide magnetic observatories. The model consists of a series of 80 spherical harmonics, up to and including those of degree and order 8. We used it to form a proposal for the 1985 revision of the International Geomagnetic...
Authors
N.W. Peddie, A.K. Zunde
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
Landslides of Eastern North America Landslides of Eastern North America
No abstract available.
Authors
Arthur Schultz, C.S. Southworth
Rainfall, ground-water flow, and seasonal movement at Minor Creek landslide, northwestern California: Physical interpretation of empirical relations Rainfall, ground-water flow, and seasonal movement at Minor Creek landslide, northwestern California: Physical interpretation of empirical relations
Simple ground-water flow analyses can clarify complex empirical relations between rainfall and landslide motion. Here we present detailed data on rainfall, ground-water flow, and repetitive seasonal motion that occurred from 1982 to 1985 at Minor Creek landslide in northwestern California, and we interpret these data in the context of physically based theories. We find that landslide...
Authors
R.M. Iverson, J. J. Major
The geomagnetic jerk of 1969 and the DGRFs The geomagnetic jerk of 1969 and the DGRFs
Cubic spline fits to the DGRF/IGRF series indicate agreement with other analyses showing the 1969-1970 magnetic jerk in the h ??12 and g ??02 secular change coefficients, and agreement that the h ??11 term showed no sharp change. The variation of the g ??01 term is out of phase with other analyses indicating a likely error in its representation in the 1965-1975 interval. We recommend...
Authors
D. Thompson, J.C. Cain
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1987
No abstract available.
Authors
John Townshend, R. O’Connell, L.Y. Torrence
DEFORESTATION AND LANDSLIDES IN YUNNAN, CHINA. DEFORESTATION AND LANDSLIDES IN YUNNAN, CHINA.
Landslides historically have caused severe erosion problems in the Xiao River drainage region of northeastern Yunnan Province, China, that hence resulted in serious economic and social consequences. Owing to monsoonal storms of high rainfall intensity, the erosion potential is high in this mountainous, seismically active region. Landslides transported large quantities of materials into...
Authors
Gerald Wieczorek, Jishan Wu, Tianchi Li
The Steens Mountain (Oregon) geomagnetic polarity transition: 3. Its regional significance The Steens Mountain (Oregon) geomagnetic polarity transition: 3. Its regional significance
Study of the variations of direction and intensity of the geomagnetic field as recorded by the Miocene lava flows on Steens Mountain, southeastern Oregon, has resulted in a detailed description of total field behavior during a reversal in polarity. In addition to information about the polarity reversal itself, the detailed paleomagnetic record includes several thousand years of...
Authors
E. A. Mankinen, E.E. Larson, C. S. Grommé, M. Prevot, R. Coe
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