Geomagnetism Program

Publications

Geomagnetism publications.

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Filter Total Items: 417
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Year Published: 2002

Geodynamo

No abstract available.

Love, Jeffrey J.

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Year Published: 2002

Holocene geomagnetic secular variation recorded by volcanic deposits at Mount St. Helens, Washington

A compilation of paleomagnetic data from volcanic deposits of Mount St. Helens is presented in this report. The database is used to determine signature paleomagnetic directions of products from its Holocene eruptive events, to assign sampled units to their proper eruptive period, and to begin the assembly of a much larger database of paleomagnetic...

Hagstrum, J.T.; Hoblitt, R.P.; Gardner, C.A.; Gray, T.E.
Holocene geomagnetic secular variation recorded by volcanic deposits at Mount St. Helens, Washington; 2002; Article; Journal; Bulletin of Volcanology; Hagstrum, J. T.; Hoblitt, R. P.; Gardner, C. A.; Gray, T. E.

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Year Published: 2002

Magnetic fields over active tectonic zones in ocean

The aim of our work is to estimate the electromagnetic effects that can be detected in the submarine zones with hydrothermal activity. It is known that meso-scale flows appear in the regions over underwater volcanoes or hot rocks. Their origin is connected with heat flux and hot jets released from underwater volcanoes or faults in a sea bottom....

Kopytenko, Yu. A.; Serebrianaya, P.M.; Nikitina, L.V.; Green, A.W.
Magnetic fields over active tectonic zones in ocean; 2002; Article; Journal; Journal of Geodynamics; Kopytenko, Yu. A.; Serebrianaya, P. M.; Nikitina, L. V.; Green, A. W.

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Year Published: 2002

Revised ages for tuffs of the Yellowstone Plateau volcanic field: Assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event

40Ar/39Ar ages were determined on the three major ash-flow tuffs of the Yellowstone Plateau volcanic field in the region of Yellowstone National Park in order to improve the precision of previously determined ages. Total-fusion and incremental-heating ages of sanidine yielded the following mean ages: Huckleberry Ridge Tuff-2.059 ?? 0.004 Ma; Mesa...

Lanphere, M. A.; Champion, D.E.; Christiansen, R.L.; Izett, G.A.; Obradovich, J. D.
Revised ages for tuffs of the Yellowstone Plateau volcanic field: Assignment of the Huckleberry Ridge Tuff to a new geomagnetic polarity event; 2002; Article; Journal; Bulletin of the Geological Society of America; Lanphere, M. A.; Champion, D. E.; Christiansen, R. L.; Izett, G. A.; Obradovich, J. D.

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Year Published: 2001

Relocation of Wyoming mine production blasts using calibration explosions

An important requirement for a comprehensive seismic monitoring system is the capability to accurately locate small seismic events worldwide. Accurate event location can improve the probability of determining whether or not a small event, recorded predominantly by local and regional stations, is a nuclear explosion. For those portions of the earth...

Finn, Carol A.; Kraft, Gordon D.; Sibol, Matthew S.; Jones, Ronald L.; Pulaski, Mark E.
Relocation of Wyoming mine production blasts using calibration explosions; 2001; Book chapter; Book; Monitoring the Comprehensive Nuclear-Test-Ban Treaty: Sourse Location; Finn, Carol A.; Kraft, Gordon D.; Sibol, Matthew S.; Jones, Ronald L.; Pulaski, Mark E.

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Year Published: 2000

The derivation of World Magnetic Model 2000

This report contains a detailed summary of the data used, the modelling techniques employed and the results obtained in the production of the World Magnetic Model 2000. This model is designed for use in air and sea navigation systems and is valid till 2005.0. The derivation of World Magnetic Model 2000 has been the joint responsibility of the...

Macmillan, Susan; Quinn, John M.

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Year Published: 2000

Book review: Geomagnetism. (Research: Past and Present)

Book information: Geomagnetism. (Research: Past and Present)" Wilfried Schröder, editor, 2000. Science Edition /IDCH-IAGA, Darmstadt Germany. 248 p.

Mankinen, Edward A.

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Year Published: 2000

The 2000 revision of the joint UK/US geomagnetic field models and an IGRF 2000 candidate model

The method of derivation of the joint UK/US spherical harmonic geomagnetic main-field and secular-variation models is presented. Early versions of these models, with the main field truncated at degree 10, are the UK/US candidates for the IGRF 2000 model. The main-field model describes the Earth’s magnetic field at the 2000.0 epoch, while the...

Macmillan, S.; Quinn, J.M.
The 2000 revision of the joint UK/US geomagnetic field models and an IGRF 2000 candidate model; 2000; Article; Journal; Earth, Planets and Space; Macmillan, S.; Quinn, J. M.

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Year Published: 1998

Automated detection of Pi 2 pulsations using wavelet analysis: 1. Method and an application for substorm monitoring

Wavelet analysis is suitable for investigating waves, such as Pi 2 pulsations, which are limited in both time and frequency. We have developed an algorithm to detect Pi 2 pulsations by wavelet analysis. We tested the algorithm and found that the results of Pi 2 detection are consistent with those obtained by visual inspection. The algorithm is...

Nose, M.; Iyemori, T.; Takeda, M.; Kamei, T.; Milling, D.K.; Orr, D.; Singer, H.J.; Worthington, E.W.; Sumitomo, N.
Automated detection of Pi 2 pulsations using wavelet analysis: 1. Method and an application for substorm monitoring; 1998; Article; Journal; Earth, Planets and Space; Nose, M.; Iyemori, T.; Takeda, M.; Kamei, T.; Milling, D. K.; Orr, D.; Singer, H. J.; Worthington, E. W.; Sumitomo, N.

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Year Published: 1998

Scaling laws from geomagnetic time series

The notion of extended self-similarity (ESS) is applied here for the X - component time series of geomagnetic field fluctuations. Plotting nth order structure functions against the fourth order structure function we show that low-frequency geomagnetic fluctuations up to the order n = 10 follow the same scaling laws as MHD fluctuations in solar...

Voros, Z.; Kovacs, P.; Juhasz, A.; Kormendi, A.; Green, A.W.
Scaling laws from geomagnetic time series; 1998; Article; Journal; Geophysical Research Letters; Voros, Z.; Kovacs, P.; Juhasz, A.; Kormendi, A.; Green, A. W.

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Year Published: 1997

On the watch for geomagnetic storms

Geomagnetic storms, induced by solar activity, pose significant hazards to satellites, electrical power distribution systems, radio communications, navigation, and geophysical surveys. Strong storms can expose astronauts and crews of high-flying aircraft to dangerous levels of radiation. Economic losses from recent geomagnetic storms have run into...

Green, Arthur W.; Brown, William M.
On the watch for geomagnetic storms; 1997; FS; 177-97; Green, Arthur W.; Brown, William M., III

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Year Published: 1997

The 1995 revision of the joint US/UK geomagnetic field models - I. Secular variation

We present the methods used to derive mathematical models of global secular variation of the main geomagnetic field for the period 1985 to 2000. These secular-variation models are used in the construction of the candidate US/UK models for the Definitive Geomagnetic Reference Field at 1990, the International Geomagnetic Reference Field for 1995 to...

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