Publications
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Passive margins: U.S. Geological Survey Line 19 across the Georges Bank basin Passive margins: U.S. Geological Survey Line 19 across the Georges Bank basin
Georges Bank is a shallow part of the Atlantic continental shelf southeast of New England (Emery and Uchupi, 1972, 1984). This bank, however, is merely the upper surface of several sedimentary basins overlying a block-faulted basement of igneous and metamorphic crystalline rock. Sedimentary rock forms a seaward-thickening cover that has accumulated in one main depocenter and several...
Authors
Kim D. Klitgord, John S. Schlee, John A. Grow
Volcanism in Hawaii Volcanism in Hawaii
No abstract available.
Some effects of quiet geomagnetic field changes upon values used for main field modeling Some effects of quiet geomagnetic field changes upon values used for main field modeling
The effects of three methods of data selection upon the assumed main field levels for geomagnetic observatory records used in main field modeling were investigated for a year of very low solar-terrestrial activity. The first method concerned the differences between the year's average of quiet day field values and the average of all values during the year. For H these differences were 2-3...
Authors
W.H. Campbell
Assessment of models proposed for the 1985 revision of the international geomagnetic reference field Assessment of models proposed for the 1985 revision of the international geomagnetic reference field
Geomagnetic measurements from land, marine and aerial surveys conducted in the years 1945-1964 were used to test the 14 models proposed as additions, for that period, to the series of definitive geomagnetic reference field (DGRF) models. Overall, NASA's 'SFAS' models and the BGS (British Geological Survey) models agree best with these data. Comparisons of the two proposed definitive main...
Authors
N.W. Peddie, A.K. Zunde
A chronology of U.S. Geological Survey hazards warnings: 1976-1986 A chronology of U.S. Geological Survey hazards warnings: 1976-1986
No abstract available.
Authors
Paula L. Gori, Clement F. Shearer
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, October 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, October 1987
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1987
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1987 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1987
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Taking the pulse of Parkfield Taking the pulse of Parkfield
No abstract available.
Authors
R. A. Kerr
Earthquakes July-August 1986 Earthquakes July-August 1986
No abstract available.
Authors
Waverly J. Person
Current loops fitted to geomagnetic model spherical harmonic coefficients. Current loops fitted to geomagnetic model spherical harmonic coefficients.
One hundred-sixty circular current loops with radial axes were fitted by least squares to the 899 spherical harmonic coefficients of a 29th degree model. In the first case, the parameters that were fitted for each loop were the normalized magnetic moment, the distance from the center of the Earth to the current element, the colatitude and E. longitude of the loop axis, and one-half of...
Authors
L.R. Alldredge