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
Earthquakes May-June 1986 Earthquakes May-June 1986
No abstract available.
Authors
Waverly J. Person
Localized sudden changes in the geomagnetic secular variation. Localized sudden changes in the geomagnetic secular variation.
There is much debate as to whether there was a worldwide geomagnetic jerk in 1969 or 1970. It is agreed that there was an unusual sharp change in the secular variation in the east component, Y, in Europe at that time. This note points out how a localized sudden change in the secular variation pattern of one component in Europe can occur without having any large worldwide effects in any...
Authors
L.R. Alldredge