Geomagnetism Program

Publications

Geomagnetism publications.

View List of Abstracts

Filter Total Items: 417
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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.

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Year Published: 2011

Long-term biases in geomagnetic K and aa indices

Analysis is made of the geomagnetic-activity aa index and its source K-index data from groups of ground-based observatories in Britain, and Australia, 1868.0–2009.0, solar cycles 11–23. The K data show persistent biases, especially for high (low) K-activity levels at British (Australian) observatories. From...

Love, Jeffrey J.

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Year Published: 2011

Secular trends in storm-level geomagnetic activity

Analysis is made of K-index data from groups of ground-based geomagnetic observatories in Germany, Britain, and Australia, 1868.0–2009.0, solar cycles 11–23. Methods include nonparametric measures of trends and statistical significance used by the hydrological and climatological research communities. Among the three observatory groups, German...

Love, J.J.
Secular trends in storm-level geomagnetic activity; 2011; Article; Journal; Annales Geophysicae; Love, J. J.

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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 total...

Mursula, K.; Tanskanen, E.; Love, J.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.

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Year Published: 2011

USGS 1-min Dst index

We produce a 1-min time resolution storm-time disturbance index, the USGS Dst, called Dst8507-4SM. This index is based on minute resolution horizontal magnetic field intensity from low-latitude observatories in Honolulu, Kakioka, San Juan and Hermanus, for the years 1985–2007. The method used to produce the index uses a combination of time-...

Gannon, J.L.; Love, Jeffrey J.

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Year Published: 2011

Widespread inclination shallowing in Permian and Triassic paleomagnetic data from Laurentia: Support from new paleomagnetic data from Middle Permian shallow intrusions in southern Illinois (USA) and virtual geomagnetic pole distributions

Recent paleomagnetic work has highlighted a common and shallow inclination bias in continental redbeds. The Permian and Triassic paleomagnetic records from Laurentia are almost entirely derived from such sedimentary rocks, so a pervasive inclination error will expectedly bias the apparent polar wander path of Laurentia in a significant way. The...

Domeier, M.; Van Der Voo, R.; Denny, F.B.
Widespread inclination shallowing in Permian and Triassic paleomagnetic data from Laurentia: Support from new paleomagnetic data from Middle Permian shallow intrusions in southern Illinois (USA) and virtual geomagnetic pole distributions; 2011; Article; Journal; Tectonophysics; Domeier, M.; Van der, Voo, R.; Denny, F. B.

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Year Published: 2010

Correlation of the Miocene Peach Spring Tuff with the geomagnetic polarity time scale and new constraints on tectonic rotations in the Mojave Desert, California

We report new paleomagnetic results and 40Ar/39Ar ages from the Peach Spring Tuff (PST), a key marker bed that occurs in the desert region between Barstow, California, and Peach Springs, Arizona. The 40Ar/39Ar ages were determined using individual hand-picked sanidine crystals from ash-flow specimens used in previous paleomagnetic studies at...

Reynolds, Robert E.; Miller, David M.; Hillhouse, John W.; Miller, David M.; Turrin, Brent D.
Correlation of the Miocene Peach Spring Tuff with the geomagnetic polarity time scale and new constraints on tectonic rotations in the Mojave Desert, California; 2010; Conference publication; Report; Overboard in the Mojave: 20 million years of lakes and wetlands; Hillhouse, John W.; Miller, David M.; Turrin, Brent D.

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Year Published: 2010

Correlation of the Miocene Peach Spring Tuff with the geomagnetic polarity time scale and new constraints on tectonic rotations in the Mojave Desert, California

We report new paleomagnetic results and 40Ar/39Ar ages from the Peach Spring Tuff (PST), a key marker bed that occurs in the desert region between Barstow, California, and Peach Springs, Arizona. The 40Ar/39Ar ages were determined using individual hand-picked sanidine crystals from ash-flow specimens used in previous paleomagnetic...

Hillhouse, John W.; Miller, David M.; Turrin, Brent D.

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Year Published: 2010

Averaging and sampling for magnetic-observatory hourly data

A time and frequency-domain analysis is made of the effects of averaging and sampling methods used for constructing magnetic-observatory hourly data values. Using 1-min data as a proxy for continuous, geomagnetic variation, we construct synthetic hourly values of two standard types: instantaneous "spot" measurements and simple 1-h "boxcar"...

Love, Jeffrey J.; Tsai, V.C.; Gannon, Jennifer L.

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Year Published: 2010

Movie‐maps of low‐latitude magnetic storm disturbance

We present 29 movie‐maps of low‐latitude horizontal‐intensity magnetic disturbance for the years 1999–2006: 28 recording magnetic storms and 1 magnetically quiescent period. The movie‐maps are derived from magnetic vector time series data collected at up to 25 ground‐based observatories. Using a technique similar to that used in the calculation of...

Love, Jeffrey J.; Gannon, Jennifer L.

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Year Published: 2009

Proceedings of the XIIIth IAGA Workshop on Geomagnetic Observatory Instruments, Data Acquisition, and Processing

The thirteenth biennial International Association of Geomagnetism and Aeronomy (IAGA) Workshop on Geomagnetic Observatory Instruments, Data Acquisition and Processing was held in the United States for the first time on June 9-18, 2008. Hosted by the U.S. Geological Survey's (USGS) Geomagnetism Program, the workshop's measurement session was held...

Love, Jeffrey J.
Proceedings of the XIIIth IAGA Workshop on Geomagnetic Observatory Instruments, Data Acquisition, and Processing; 2009; OFR; 2009-1226; Edited by Love, Jeffrey J.