Results 31 to 40 of about 2,347 (211)

Comparison of eight years magnetic field data from Cluster with Tsyganenko models in the inner magnetosphere [PDF]

, 2010
Eight years of magnetic field data, taken while the four Cluster spacecraft pass through, or adjacent to, the equatorial ring current, have been surveyed to investigate the effects on the Earth's magnetic field of the externally driven current systems
Holme R, Dunlop MW, Dunlop, M.W., Woodfield, E.E., Woodfield EE, M. W. Dunlop, Holme, R., Q.-H. Zhang, E. E. Woodfield, R. Holme, Zhang QH, Zhang, Q.-H.   +11 more
core   +1 more source

April 2000 geomagnetic storm: Ionospheric drivers of large geomagnetically induced currents [PDF]

, 2003
International audienceGeomagnetically induced currents (GIC) flowing in technological systems on the ground are a direct manifestation of space weather. Due to the proximity of very dynamic ionospheric current systems, GIC are of special interest at high
Thomson, A., A. Thomson, A. Pulkkinen, E. Clarke, Pulkkinen, A., Clarke, E., A. McKay, McKay, A.   +7 more
core   +1 more source

The electric field in northern England and southern Scotland: implications for geomagnetically induced currents. [PDF]

, 2006
Magnetotelluric (MT) data, in the form of MT tensors, are used to estimate directly the size and spatial distribution of the electric field in northern England and southern Scotland with the aim of predicting the flow of geomagnetically induced currents ...
McKay, A. J., Whaler, K. A.; id_orcid, McKay, Allan, Whaler, K.A.   +3 more
core   +1 more source

Geomagnetic secular variation forecast using the NASA GEMS ensemble Kalman filter: A candidate SV model for IGRF-13

Earth, Planets and Space, 2021
We have produced a 5-year mean secular variation (SV) of the geomagnetic field for the period 2020–2025. We use the NASA Geomagnetic Ensemble Modeling System (GEMS), which consists of the NASA Goddard geodynamo model and ensemble Kalman filter (EnKF ...
Andrew Tangborn, Weijia Kuang, Terence J. Sabaka, Ce Yi   +3 more
doaj   +1 more source

A statistical comparison of hot-ion properties at geosynchronous orbit during intense and moderate geomagnetic storms at solar maximum and minimum. [PDF]

, 2006
Hot-ion measurements at geosynchronous orbit from the Los Alamos Magnetospheric Plasma Analyzer (MPA) instrument during geomagnetic storms at solar maximum (July 1999–June 2002) and at solar minimum (July 1994–June 1997) are collected, categorized, and ...
Zhang, Jichun C., Kozyra, Janet U., Borovsky, Jospeh E., Borovsky, Joseph E., Thomsen, Michelle F., Denton, Michael H., Liemohn, Michael W., Zhang, Jichun   +7 more
core   +1 more source

Modeling of the Sq geomagnetic field induced by tidal oscillations of the atmosphere

Earth and Planetary Physics
The Sq (solar quiet) geomagnetic field is generated by the electric currents in the E-region of the ionosphere, driven by the atmospheric tides. It is a critical part of high-precision geomagnetic field modeling.
WenBo Li, DaLi Kong, HongBo Yao, Hao Yan
doaj   +1 more source

Modeling the Geomagnetic Response to the September 2017 Space Weather Event Over Fennoscandia Using the Space Weather Modeling Framework: Studying the Impacts of Spatial Resolution

Space Weather, 2021
We must be able to predict and mitigate against geomagnetically induced current (GIC) effects to minimize socio‐economic impacts. This study employs the space weather modeling framework (SWMF) to model the geomagnetic response over Fennoscandia to the ...
A. P. Dimmock, D. T. Welling, L. Rosenqvist, C. Forsyth, M. P. Freeman, I. J. Rae, A. Viljanen, E. Vandegriff, R. J. Boynton, M. A. Balikhin, E. Yordanova   +10 more
doaj   +1 more source

Magnetic field at geosynchronous orbit during high-speed stream-driven storms: Connections to the solar wind, the plasma sheet, and the outer electron radiation belt [PDF]

, 2010
Superposed-epoch analysis is performed on magnetic field measurements from five GOES spacecraft in geosynchronous orbit during 63 high-speed stream-driven storms in 1995–2005. The field strength and the field stretching angle are examined as functions of
Joseph E. Borovsky, Denton, Michael H., Michael H. Denton, Borovsky, J. E.   +3 more
core   +1 more source

Improved construction method for regional geomagnetic benchmark map based on Taylor polynomial modeling

Shenzhen Daxue xuebao. Ligong ban
To address the issues of limited accuracy and poor adaptability in the traditional geomagnetic benchmark map modeling, we propose a construction method for regional geomagnetic benchmark map based on Taylor polynomial expansion.
LI Yunhong, LI Yunti, LI Shibo, AN Yuxin, HU Yingjie, ZHANG Zhaozhao, LIU Wanghong   +6 more
doaj   +1 more source

The influence of regularization on the geomagnetic core field modeling

地球与行星物理论评
Earth's magnetic field is generated through the dynamo action in the liquid outer core. Using observational data from geomagnetic satellites and observatories, we can construct geomagnetic models that describe spatial and temporal variations of the core ...
Juyuan Xu, Yufeng Lin, Keke Zhang
doaj   +1 more source