Results 31 to 40 of about 130 (107)

Large, Long‐Lasting Mid‐Latitude Geomagnetically Induced Currents During a Moderate Geomagnetic Storm

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Geomagnetically Induced Currents (GICs) are a key space weather hazard to ground‐based infrastructure, and can cause mis‐operation or even equipment failure. The solar wind interacts with the Earth's geomagnetic field, causing the magnetic field at ground level to vary with time.
A. W. Smith, C. J. Rodger, I. J. Rae, D. H. Mac Manus, M. A. Clilverd, J. Malone‐Leigh, J. C. Coxon, C. D. Beggan, J. Hübert, A. Renton, A. P. Dimmock, C. Forsyth, M.‐T. Walach, W. Sun, K. M. Pratscher, T. Petersen, M. Dalzell   +16 more
wiley   +1 more source

MagPySV: A Python Package for Processing and Denoising Geomagnetic Observatory Data

Geochemistry, Geophysics, Geosystems, 2018
Measurements obtained at ground‐based observatories are crucial to understanding the geomagnetic field and its secular variation (SV). However, current data processing methods rely on piecemeal closed‐source codes or are performed on an ad hoc basis ...
G. A. Cox, W. J. Brown, L. Billingham, R. Holme   +3 more
doaj   +1 more source

Identifying and Predicting Coronal Mass Ejection Occurrence: Observational Checklists for Space Weather Forecasters

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Ejections of magnetized plasma from the Sun, known as coronal mass ejections, can drive major geomagnetic activity if Earth‐directed, and are therefore monitored by space weather forecasters. The current focus being the forecast of the arrival time of a coronal mass ejection at Earth and the level of geomagnetic impact.
L. M. Green, A. W. James, N. Ngampoopun, S. L. Yardley, K. Waite, E. K. Mottram, J. Hernandez Camero, J. O'kane   +7 more
wiley   +1 more source

Geomagnetic jerks from the Earth’s surface to the top of the core [PDF]

Earth, Planets and Space, 2007
Abstract Rapid changes in the magnetic field characterised by an abrupt change in the secular variation have been named “secular variation impulses” or “geomagnetic jerks”. Three of these events, around 1968, 1978 and 1990, occurred during the time-span covered by the comprehensive model CM4 (Sabaka et al., 2002, 2004).
Chambodut, Aude, Eymin, C., Mandea, Mioara   +2 more
openaire   +3 more sources

Dynamic evolution of amplitude and position of geomagnetic secular acceleration pulses since 2000

Frontiers in Earth Science
Recent studies on the behavior of geomagnetic secular acceleration (SA) pulses have provided a basis for understanding the dynamic processes in the Earth’s core.
Chunhua Bai, Guoming Gao, Limin Wen, Guofa Kang   +3 more
doaj   +1 more source

Solar Wind‐Magnetosphere‐Ionosphere Coupling During the October 2024 Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Two geomagnetic storms occurred in October 2024 (Oct 6‐9 and 10–12), driven by the impact of a series of interplanetary coronal mass ejections on the magnetosphere. The first was a moderate storm, with peak Sym‐H near −150 nT, whereas the second was intense, Sym‐H reaching −340 nT.
S. E. Milan, M. K. Mooney, G. E. Bower, R. M. Hodnett, U. V. Amerstorfer, C. Möstl, A. Samsonov, B. J. Anderson, J. Gjerloev, S. K. Vines   +9 more
wiley   +1 more source

Multi‐Decadal Trends in the Low Latitude foF2 Driven by Secular Magnetic Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Long‐term ionospheric trends have been widely studied, but their origin and magnitude remain subjects of debate. This study quantifies the linear trend in the F2‐region critical frequency (foF2) and its local time dependence using observations from eight low‐latitude ionosonde stations.
D. Singh, S. R. Zhang, L. P. Goncharenko, I. S. Batista, A. J. Coster   +4 more
wiley   +1 more source

Finding the Magnetopause Standoff Distance Using Soft X‐Ray Images: Application for the SMILE Mission

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Soft X‐rays are emitted in the magnetosheath and cusps because of solar wind charge exchange. The soft X‐ray Imager (SXI) on board Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) will measure these X‐rays. We developed a new method for finding the magnetopause standoff distance from simulations that reproduce the expected X‐ray ...
Andrey Samsonov, Jennifer Alyson Carter, Steven Sembay, Andrew Read, Colin Forsyth, Samuel Wharton, Philippe Escoubet   +6 more
wiley   +1 more source

Bayesian Inference of Local Paleosecular Variation From Sparse Paleomagnetic Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract We introduce a novel Bayesian method to construct local paleosecular variation (PSV) curves. By modeling the geomagnetic field as a Gaussian process, global models can be incorporated as informative prior distributions. Because we use Hamiltonian Monte‐Carlo methods, complex age distributions resulting for example from radiocarbon calibration ...
M. A. Schanner, R. Meyer, L. V. de Groot
wiley   +1 more source

Determining the Magnetopause Location With SMILE‐SXI Using a Constrained Solar Wind Independent SWCX Model

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract The soft X‐ray imager (SXI) on the SMILE mission promises to revolutionize our understanding of the magnetopause by observing solar wind charge exchange emission from the magnetosheath on a global scale. The primary goal of this instrument is to infer the position and shape of the magnetopause from these images.
S. J. Wharton, J. A. Carter, S. Sembay, A. Paganini, V. Maddi, C. Pagani, Z. Clare, A. Samsonov   +7 more
wiley   +1 more source