Geomagnetism Program

Publications

Geomagnetism publications.

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Filter Total Items: 417
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Year Published: 1992

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...

Peddie, N.W.
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; 1992; Article; Journal; Journal of Geomagnetism & Geoelectricity; Peddie, N. W.

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Year Published: 1992

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, a main-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...

Peddie, N.W.
Evaluation of models proposed for the 1991 revision of the International Geomagnetic Reference Field; 1992; Article; Journal; Journal of Geomagnetism & Geoelectricity; Peddie, N. W.

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Year Published: 1992

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...

Herzog, D.C.

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Year Published: 1992

Quiet geomagnetic field representation for all days and latitudes

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. A data set of observatories near 75??E longitude was used as illustration. The method relies upon spatial smoothing of...

Campbell, W.H.; Schiffmacher, E.R.; Arora, B.R.
Quiet geomagnetic field representation for all days and latitudes; 1992; Article; Journal; Journal of Geomagnetism & Geoelectricity; Campbell, W. H.; Schiffmacher, E. R.; Arora, B. R.

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Year Published: 1991

An automatic, quasi-absolute, geomagnetic calibration system

Sauter, E.A.
An automatic, quasi-absolute, geomagnetic calibration system; 1991; OFR; 91-350; Sauter, E. A.

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, August 1991; 1991; OFR; 91-300-H; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1991; 1991; OFR; 91-300-L; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1991; 1991; OFR; 91-300-B; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1991; 1991; OFR; 91-300-A; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, July 1991; 1991; OFR; 91-300-G; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, March 1991; 1991; OFR; 91-300-C; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann

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Year Published: 1991

Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1991

Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1991; 1991; OFR; 91-300-E; Townshend, John B.; O'Connell, Richard V.; Varner, Carol Ann