Results 41 to 50 of about 143 (124)

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

Detection of High‐Latitude Magnetic Reconnection Between the Northward Interplanetary Magnetic Field and a Closed Magnetic Field Wedge Linked to a Transpolar Arc

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Transpolar arcs (TPAs) describe a subset of auroral emissions observed poleward of the Earth's main auroral ovals when the interplanetary magnetic field (IMF) is northward. These emissions are thought to align with a “wedge” of closed magnetic field lines extending to the high‐latitude boundary of the Earth's magnetosphere, where they are ...
Nawapat Kaweeyanun, Robert C. Fear, Betty S. Lanchester, Daniel K. Whiter, Imogen L. Gingell, Andrew N. Fazakerley, Iannis Dandouras, Stephen B. Mende, Larry J. Paxton   +8 more
wiley   +1 more source

GRACE Detection of Transient Mass Redistributions During a Mineral Phase Transition in the Deep Mantle

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The temporal evolution of the core‐mantle boundary (CMB) is of critical importance in elucidating the dynamic interactions between the fluid core and the solid mantle, but remains largely unknown. To investigate corresponding mass redistributions, we analyze GRACE satellite and Satellite Laser Ranging (SLR) measurements of the 2003–2015 space ...
Charlotte Gaugne Gouranton, Isabelle Panet, Marianne Greff‐Lefftz, Mioara Mandea, Séverine Rosat   +4 more
wiley   +1 more source

Detection of geomagnetic jerks using wavelet analysis [PDF]

Journal of Geophysical Research: Solid Earth, 1995
Wavelet analysis is applied to detect and characterize singular events, or singularities, or jerks, in the time series made of the last century monthly mean values of the east component of the geomagnetic field from European observatories. After choosing a well‐adapted wavelet function, the analysis is first performed on synthetic series including an ...
Alexandrescu, Mioara, Gibert, Dominique, Hulot, Gauthier, Le Mouël, Jean-Louis, Saracco, Ginette   +4 more
openaire   +3 more sources

AKR Observations From All Local Times Indicate Substorm Activity

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract Auroral Kilometric Radiation (AKR) is known to present emission at lower frequencies near substorm onset, corresponding to activation of higher altitude sources along auroral magnetic field lines and acting as a proxy of the vertical distribution of acceleration processes during these events.
J. E. Waters, L. Lamy, J. Coxon, C. M. Jackman, C. J. Lao, C. Forsyth, A. R. Fogg   +6 more
wiley   +1 more source

Preface

Annals of Geophysics, 2009
Earth is a complex dynamic system and study of the geomagnetic field can provide<br />insight to the dynamic processes operative in the outer core where the main field is<br />produced by a geo-dynamo mechanism.
Baldev Arora, Angelo De Santis, Heather McCreadie   +2 more
doaj   +1 more source

Statistical Distribution of Dawnside Auroral Polarization Streams

Geophysical Research Letters, Volume 52, Issue 13, 16 July 2025.
Abstract Dawnside auroral polarization streams (DAPS) are fast eastward flows in the dawn convection cell of Earth's ionosphere. With a steep flow gradient near the interface between Region 1 and 2 currents and a peak poleward of it, DAPS were suggested to be responsible for instabilities and dramatic events in the magnetosphere‐ionosphere (M‐I) system.
Jiang Liu, Colin Forsyth, L. R. Lyons, Chih‐Ping Wang, Vassilis Angelopoulos, Andrei Runov, Sheng Tian, Yangyang Shen, Johnathan K. Burchill, S. Milan   +9 more
wiley   +1 more source

Could the Mw = 9.3 Sumatra earthquake trigger a geomagnetic jerk? [PDF]

Eos, Transactions American Geophysical Union, 2005
The magnetic field observed at the Earth's surface is not a stationary feature. It is characterized by time variations ranging from milliseconds (micropulsations) to millions of years (the time interval between field reversals). Time variations with periods of a year or longer are related to Earth's outer core sources, whereas for shorter timescales an
Florindo, F., De Michelis, P., Piersanti, A., Boschi, E.   +3 more
openaire   +3 more sources