Geomagnetism Program

Publications

Geomagnetism publications.

View List of Abstracts

Filter Total Items: 417
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Year Published: 2008

Magnetic monitoring of earth and space

For centuries, navigators of the world’s oceans have been familiar with an effect of Earth’s magnetic field: It imparts a directional preference to the needle of a compass. Although in some settings magnetic orientation remains important, the modern science of geomagnetismhas emerged from its romantic nautical...

Love, Jeffrey J.

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Year Published: 2008

Monitoring the Earth's dynamic magnetic field

The mission of the U.S. Geological Survey's Geomagnetism Program is to monitor the Earth's magnetic field. Using ground-based observatories, the Program provides continuous records of magnetic field variations covering long timescales; disseminates magnetic data to various governmental, academic, and private institutions; and conducts research...

Love, Jeffrey J.; Applegate, David; Townshend, John B.
Monitoring the Earth's Dynamic Magnetic Field; 2008; FS; 2007-3092; Love, Jeffrey J.; Applegate, David; Townshend, John B.

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Year Published: 2008

Lightning‐driven electric fields measured in the lower ionosphere: Implications for transient luminous events

Transient luminous events above thunderstorms such as sprites, halos, and elves require large electric fields in the lower ionosphere. Yet very few in situ measurements in this region have been successfully accomplished, since it is typically too low in altitude for rockets and satellites and too high for balloons. In this article, we present some...

Thomas, Jeremy N.; Barnum, Benjamin H.; Lay, Erin; Holzworth, Robert H.; Cho, Mengu; Kelley, Michael C.

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Year Published: 2008

Rare measurements of a sprite with halo event driven by a negative lightning discharge over Argentina

As part of a collaborative campaign to investigate Transient Lummous Events (TLEs) over South America, coordinated optical, ELF/VLF, and lightning measurements were made of a mesoscale thunderstorm observed on February 22-23, 2006 over northern Argentina that produced 445 TLEs within a ???6 hour period. Here, we report comprehensive measurements...

Taylor, M.J.; Bailey, M.A.; Pautet, P.D.; Cummer, S.A.; Jaugey, N.; Thomas, J.N.; Solorzano, N.N.; Sao, Sabbas F.; Holzworth, R.H.; Pinto, O.; Schuch, N.J.
Rare measurements of a sprite with halo event driven by a negative lightning discharge over Argentina; 2008; Article; Journal; Geophysical Research Letters; Taylor, M. J.; Bailey, M. A.; Pautet, P. D.; Cummer, S. A.; Jaugey, N.; Thomas, J. N.; Solorzano, N. N.; Sao, Sabbas, F.; Holzworth, R. H.; Pinto, O.; Schuch, N. J.

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Year Published: 2007

Statistical modeling of storm level Kp occurrences: Solar cycle modulation

We consider the nonstationary, statistical modeling of the occurrence in time of large Kp geomagnetic storms over the course of multiple solar cycles. Previous work showed that wait times between storms can be represented by an exponential density function, consistent with the realization of a Poisson process. Here we also assume a...

Love, Jeffrey J.; Remick, K.J.; Perkins, David M.

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Year Published: 2007

The International Geomagnetic Reference Field, 2005

This is a set of five world charts showing the declination, inclination, horizontal intensity, vertical component, and total intensity of the Earth's magnetic field at mean sea level at the beginning of 2005. The charts are based on the International Geomagnetic Reference Field (IGRF) main model for 2005 and secular change model for 2005-2010. The...

Rukstales, Kenneth S.; Love, Jeffrey J.
The International Geomagnetic Reference Field, 2005; 2007; SIM; 2964; Rukstales, Kenneth S.; Love, Jeffrey J.

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Year Published: 2007

The contribution of geomagnetic observatories and magnetic models to the study of secular variation and jerks in Antarctica

Some of the most interesting features of the geomagnetic field and its time variations are displayed in polar areas. Observatory monthly means usually provide an excellent opportunity to study the temporal changes of the magnetic field at a given location. Unfortunately, on the Antarctic continent the distribution of the permanent ground- based...

Meloni, A.; Cafarella, L.; Michelis, P. De; Tozzi, R.
The contribution of geomagnetic observatories and magnetic models to the study of secular variation and jerks in Antarctica; 2007; OFR; 2007-1047-SRP-071; Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007; Meloni, A.; Cafarella, L.; Michelis, P. De; Tozzi, R.

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Year Published: 2007

Statistical methods for paleovector analysis

Our concern is with the statistical description of paleomagnetic vectors and the estimation of their mean and variance. These vectors may come from a number of different rock units or archeological samples, representing a range of acquisition times, and be useful for studies of the mean paleomagnetic field and paleosecular variation;...

Love, Jeffrey J.

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Year Published: 2007

Principal component analysis in paleomagnetism

When studying the mean and variance of paleomagnetic data it is a common practice to employ principal component analysis (Jolliffe, 2002). The theory of this method is related to the mathematics quantifying the moment of inertia of a set of particles of mass about some reference point of interest. For the purposes of data analysis, principal...

Love, Jeffrey J.

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Year Published: 2007

Observatories, program in USA

The Geomagnetism Program of the US Geological Survey has, for over a century now, monitored the Earth's magnetic field through a network of magnetic observatories and conducted scientific analysis on the data collected. The program traces its origins to the Reorganization Act of 1843, in which Congress authorized the creation of a coastal survey...

Love, Jeffrey J.; Townshend, J.B.

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Year Published: 2007

Magnetic indices

Magnetic indices are simple measures of magnetic activity that occurs, typically, over periods of time of less than a few hours and which is recorded by magnetometers at ground‐based observatories (Mayaud, 1980; Rangarajan, 1989; McPherron, 1995). The variations that indices measure have their origin in the Earth's ionosphere and...

Love, Jeffrey J.; Remick, K.J.