Geomagnetism Program

Publications

Geomagnetism publications.

View List of Abstracts

Filter Total Items: 416
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Year Published: 2012

On the reported ionospheric precursor of the 1999 Hector Mine, California earthquake

Using Global Positioning System (GPS) data from sites near the 16 Oct. 1999 Hector Mine, California earthquake, Pulinets et al. (2007) identified anomalous changes in the ionospheric total electron content (TEC) starting one week prior to the earthquake. Pulinets (2007) suggested that precursory phenomena of this type could be useful for...

Thomas, Jeremy N.; Love, Jeffrey J.; Komjathy, Attila; Verkhoglyadova, Olga P.; Butala, Mark; Rivera, Nicholas

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Year Published: 2012

Measuring the orthogonality error of coil systems

Recently, a simple method was proposed for the determination of pitch angle between two coil axes by means of a total field magnetometer. The method is applicable when the homogeneous volume in the centre of the coil system is large enough to accommodate the total field sensor. Orthogonality of calibration coil systems used for calibrating...

Heilig, B.; Csontos, A.; Pajunpää, K.; White, Tim; St. Louis, B.; Calp, D.
Measuring the orthogonality error of coil systems; 2012; Article; Journal; Proceedings of the XVth IAGA Workshop on Geomagnetic Observatory Instruments; Heilig, B.; Csontos, A.; Pajunpää, K.; White, Tim; St. Louis, B.; Calp, D.

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Year Published: 2012

Solar thematic maps for space weather operations

Thematic maps are arrays of labels, or "themes", associated with discrete locations in space and time. Borrowing heavily from the terrestrial remote sensing discipline, a numerical technique based on Bayes' theorem captures operational expertise in the form of trained theme statistics, then uses this to automatically assign labels to solar image...

Rigler, E. Joshua; Hill, Steven M.; Reinard, Alysha A.; Steenburgh, Robert A.
Solar thematic maps for space weather operations; 2012; Article; Journal; Space Weather; Rigler, E. Joshua; Hill, Steven M.; Reinard, Alysha A.; Steenburgh, Robert A.

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Year Published: 2011

Geomagnetic referencing in the arctic environment

Geomagnetic referencing is becoming an increasingly attractive alternative to north-seeking gyroscopic surveys to achieve the precise wellbore positioning essential for success in today's complex drilling programs. However, the greater magnitude of variations in the geomagnetic environment at higher latitudes makes the application of geomagnetic...

Podjono, Benny; Beck, Nathan; Buchanan, Andrew; Brink, Jason; Longo, Joseph; Finn, Carol A.; Worthington, E. William
Geomagnetic referencing in the arctic environment; 2011; Conference publication; Podjono, Benny ; Beck, Nathan ; Buchanan, Andrew ; Brink, Jason ; Longo, Joseph ; Finn, Carol A.; Worthington, E. William

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Year Published: 2011

Magnetic Observatory

Love, Jeffrey J.
Magnetic Observatory; 2011; Book chapter; Book; McGraw-Hill Encyclopedia of Science & Technology, 11th Edition: Vol. 10; Love, Jeffrey J.

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Year Published: 2011

The USGS Geomagnetism Program and its role in Space-Weather Monitoring

Magnetic storms result from the dynamic interaction of the solar wind with the coupled magnetospheric-ionospheric system. Large storms represent a potential hazard for the activities and infrastructure of a modern, technologically based society [Baker et al., 2008]; they can cause the loss of radio communications, reduce the accuracy of global...

Love, Jeffrey J.; Finn, Carol A.
The USGS Geomagnetism Program and its role in Space-Weather Monitoring; 2011; Article; Journal; Space Weather; Love, Jeffrey J.; Finn, Carol A.

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Year Published: 2011

Spring-fall asymmetry of substorm strength, geomagnetic activity and solar wind: Implications for semiannual variation and solar hemispheric asymmetry

We study the seasonal variation of substorms, geomagnetic activity and their solar wind drivers in 1993–2008. The number of substorms and substorm mean duration depict an annual variation with maxima in Winter and Summer, respectively, reflecting the annual change of the local ionosphere. In contradiction, substorm mean amplitude, substorm...

Marsula, K.; Tanskanen, E.; Love, J.J.
Spring-fall asymmetry of substorm strength, geomagnetic activity and solar wind: Implications for semiannual variation and solar hemispheric asymmetry; 2011; Article; Journal; Geophysical Research Letters; Marsula, K. ; Tanskanen, E. ; Love, J. J.

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Year Published: 2011

U.S. Geological Survey Near Real-Time Dst Index

The operational version of the United States Geological Survey one-minute Dst index (a global geomagnetic disturbance-intensity index for scientific studies and definition of space-weather effects) uses either four- or three-station input (including Honolulu, Hawaii; San Juan, Puerto Rico; Hermanus, South Africa; and Kakioka, Japan; or Honolulu,...

Gannon, J.L.; Love, J.J.; Friberg, P.A.; Stewart, D.C.; Lisowski, S.W.
U.S. Geological Survey Near Real-Time Dst Index; 2011; OFR; 2011-1030; Gannon, J.L.; Love, J.J.; Friberg, P.A.; Stewart, D.C.; Lisowski, S.W.

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Year Published: 2011

An empirical model of the quiet daily geomagnetic field variation

 An empirical model of the quiet daily geomagnetic field variation has been constructed based on geomagnetic data obtained from 21 stations along the 210 Magnetic Meridian of the Circum‐pan Pacific Magnetometer Network (CPMN) from 1996 to 2007. Using the least squares fitting method for geomagnetically quiet days (Kp ≤ 2+), the quiet...

Yamazaki, Y.; Yumoto, K.; Cardinal, M.G.; Fraser, B.J.; Hattori, P.; Kakinami, Y.; Liu, J.Y.; Lynn, K.J.W.; Marshall, R.; McNamara, D.; Nagatsuma, T.; Nikiforov, V.M.; Otadoy, R.E.; Ruhimat, M.; Shevtsov, B.M.; Shiokawa, K.; Abe, S.; Uozumi, T.; Yoshikawa, A.

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Year Published: 2011

Are secular correlations between sunspots, geomagnetic activity, and global temperature significant?

Recent studies have led to speculation that solar‐terrestrial interaction, measured by sunspot number and geomagnetic activity, has played an important role in global temperature change over the past century or so. We treat this possibility as an hypothesis for testing. We examine the statistical significance of cross‐correlations between sunspot...

Love, Jeffrey J.; Mursula, K.; Tsai, V.C.; Perkins, D.M.

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Year Published: 2011

East Antarctic rifting triggers uplift of the Gamburtsev Mountains

The Gamburtsev Subglacial Mountains are the least understood tectonic feature on Earth, because they are completely hidden beneath the East Antarctic Ice Sheet. Their high elevation and youthful Alpine topography, combined with their location on the East Antarctic craton, creates a paradox that has puzzled researchers since the mountains were...

Ferraccioli, F.; Finn, Carol A.; Jordan, Tom A.; Bell, Robin E.; Anderson, Lester M.; Damaske, Detlef
East Antarctic rifting triggers uplift of the Gamburtsev Mountains; 2011; Article; Journal; Nature; Ferraccioli, F.; Finn, Carol A.; Jordan, Tom A.; Bell, Robin E.; Anderson, Lester M.; Damaske, Detlef

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Year Published: 2011

Geomagnetic referencing in the arctic environment

Geomagnetic referencing is becoming an increasingly attractive alternative to north-seeking gyroscopic surveys to achieve the precise wellbore positioning essential for success in today's complex drilling programs. However, the greater magnitude of variations in the geomagnetic environment at higher latitudes makes the application of geomagnetic...

Poedjono, B.; Beck, N.; Buchanan, A. C.; Brink, J.; Longo, J.; Finn, C.A.; Worthington, E.W.
Geomagnetic referencing in the arctic environment; 2011; Conference Paper; Society of Petroleum Engineers - Arctic and Extreme Environments Conference and Exhibition 2011; Poedjono, B.; Beck, N.; Buchanan, A.; Brink, J.; Longo, J.; Finn, C. A.; Worthington, E. W.