Geomagnetism Program

Publications

Geomagnetism publications.

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Filter Total Items: 417
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Year Published: 1997

The 1995 revision of the joint US/UK geomagnetic field models. II: Main field

This paper presents the 1995 main-field revision of the World Magnetic Model (WMM-95). It is based on Project MAGNET high-level (??? 15,000 ft.) vector aeromagnetic survey data collected between 1988 and 1994 and on scalar total intensity data collected by the Polar Orbiting Geomagnetic Survey (POGS) satellite during the period 1991 through 1993....

Quinn, J.M.; Coleman, R.J.; Macmillan, S.; Barraclough, D.R.
The 1995 revision of the joint US/UK geomagnetic field models. II: Main field; 1997; Article; Journal; Earth, Planets and Space; Quinn, J. M.; Coleman, R. J.; Macmillan, S.; Barraclough, D. R.

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Year Published: 1996

Aeromagnetic survey over U.S. to advance geomagnetic research

A proposed high‐altitude survey of the United States offers an exciting and cost effective opportunity to collect magnetic‐anomaly data. Lockheed Martin Missile and Space Company is considering funding a reimbursable ER‐2 aircraft (Figure 1) mission to collect synthetic aperture radar (SAR) imagery at an altitude of about 21 km over the...

Hildenbrand, T.G.; Blakely, R.J.; Hinze, W. J.; Keller, Gordon R.; Langel, R.A.; Nabighian, M.; Roest, W.

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Year Published: 1996

Aeromagnetic survey over US to advance geomagnetic research

A proposed high-altitude survey of the US offers an exciting and cost effective opportunity to collect magnetic-anomaly data. Lockheed Martin Missile and Space Company is considering funding a reimbursable ER-2 aircraft mission to collect synthetic aperture radar (SAR) imagery at an altitude of about 21 km over the conterminous US and Alaska. The...

Hildenbrand, T.G.; Blakely, R.J.; Hinze, W. J.; Keller, Gordon R.; Langel, R.A.; Nabighian, M.; Roest, W.
Aeromagnetic survey over US to advance geomagnetic research; 1996; Article; Journal; Eos; Hildenbrand, T. G.; Blakely, R. J.; Hinze, W. J.; Keller, G. R.; Langel, R. A.; Nabighian, M.; Roest, W.

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Year Published: 1996

Geomagnetic storms, the Dst ring-current myth and lognormal distributions

The definition of geomagnetic storms dates back to the turn of the century when researchers recognized the unique shape of the H-component field change upon averaging storms recorded at low latitude observatories. A generally accepted modeling of the storm field sources as a magnetospheric ring current was settled about 30 years ago at the start...

Campbell, W.H.
Geomagnetic storms, the Dst ring-current myth and lognormal distributions; 1996; Article; Journal; Journal of Atmospheric and Terrestrial Physics; Campbell, W. H.

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Year Published: 1994

Preliminary geomagnetic paleointensities from Long Valley Caldera, California

Paleointensities are being determined in order to characterize geomagnetic intensity variations during Quaternary time. Because the geomagnetic field acts as a shield against cosmic radiation, its intensity directly affects the production rate of radiocarbon (^C) in the upper atmosphere. Coe and others (1978) showed that the variation in dipole...

Mankinen, Edward A.
Preliminary geomagnetic paleointensities from Long Valley Caldera, California; 1994; OFR; 94-633; Mankinen, Edward A.

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Year Published: 1993

Broad trends in geomagnetic paleointensity on Hawaii during Holocene time

Paleointensity determinations have been obtained from 22 basaltic lava flows on the island of Hawaii using the Thelliers' method. Radiocarbon dating indicates that these flows erupted at intervals ranging from about 200 to 1000 years, and results of the experiments provide an estimate of broad trends in geomagnetic paleointensity during Holocene...

Mankinen, Edward A.; Champion, Duane E.

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Year Published: 1993

Latest pleistocene and holocene geomagnetic paleointensity on Hawaii

Geomagnetic paleointensity determinations from radiocarbon-dated lava flows on the island of Hawaii provide an estimate of broad trends in paleointensity for Holocene time and offer a glimpse of intensity variations near the end of the last glacial period. When the data from Hawaii are compared with others worldwide, the intensity of the...

Mankinen, E.A.; Champion, D.E.
Latest pleistocene and holocene geomagnetic paleointensity on Hawaii; 1993; Article; Journal; Science; Mankinen, E. A.; Champion, D. E.

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Year Published: 1992

40Ar/39Ar dating of the Jaramillo normal subchron and the Matuyama and Brunhes geomagnetic boundary

Izett, G.A.; Obradovich, J. D.
40Ar/39Ar dating of the Jaramillo normal subchron and the Matuyama and Brunhes geomagnetic boundary; 1992; OFR; 92-699; Izett, G. A.; Obradovich, J. D.

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Year Published: 1992

Preliminary geomagnetic data, College Observatory, Fairbanks

Preliminary geomagnetic data, College Observatory, Fairbanks; 1992; OFR; 92-300-A; Geological Survey (U.S.)

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Year Published: 1992

Preliminary geomagnetic data, College Observatory, Fairbanks

Preliminary geomagnetic data, College Observatory, Fairbanks; 1992; OFR; 92-300-B; Geological Survey (U.S.)

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Year Published: 1992

Preliminary geomagnetic data, College Observatory, Fairbanks

Preliminary geomagnetic data, College Observatory, Fairbanks; 1992; OFR; 92-300-D; Geological Survey (U.S.)

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Year Published: 1992

Preliminary geomagnetic data, College Observatory, Fairbanks

Preliminary geomagnetic data, College Observatory, Fairbanks; 1992; OFR; 92-300-C; Geological Survey (U.S.)