Results 71 to 80 of about 6,140,836 (207)

Soft X‐Ray Telescopes of the Future: Trade Study of Micro‐Pore Optic Size for Imaging Dayside Magnetospheric Features

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract This study compares the capabilities of different sized micro‐pore optic (MPO) based soft X‐ray telescopes and their ability to observe features and phenomena of the magnetosheath at Earth. The basic science is the starting point and different instrument properties are applied to test which would be capable of studying features of the near ...
Emil A. Atz, Brian M. Walsh, Kip D. Kuntz, Maxime Grandin, Markus Battarbee, Yann Pfau‐Kempf, Minna Palmroth   +6 more
wiley   +1 more source

Underlying scaling relationships between solar activity and geomagnetic activity revealed by multifractal analyses [PDF]

, 2014
Free to read\ud \ud This paper identifies some scaling relationships between solar activity and geomagnetic activity. We examine the scaling properties of hourly data for two geomagnetic indices (ap and AE), two solar indices (solar X-rays Xl and solar ...
Anh, Vo, Eastes, Richard, Zu‐Guo Yu, Vo Anh, Yu, Zu-Guo, Richard Eastes   +5 more
core   +1 more source

The Spatial Localization of Storm‐Time ULF Waves Due To Plasmaspheric Plumes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract The generation and propagation of Ultra Low Frequency (ULF) waves are intrinsically coupled to the cold plasma population in the terrestrial magnetosphere. During geomagnetic storms, extreme reconfigurations of the cold plasma create a complex and dynamic system that drastically modifies this coupling.
J. K. Sandhu, K. R. Murphy, I. J. Rae, T. K. Yeoman, A. W. Degeling, A. Osmane, D. P. Hartley, M.‐T. Walach   +7 more
wiley   +1 more source

Recovering of local magnetic K-indices from global magnetic Kp-indices using neural networks: an application to Antarctica

Annals of Geophysics, 2015
This paper describes a method to obtain local magnetic index, K, from the global index, Kp. Until now, however, for the cases of areas without magnetic observatories, to estimate the geomagnetic activity there, global indices were the only option.
Antoni Segarra, Juan José Curto
doaj   +1 more source

Global Geomagnetic Model Errors as a Function of Altitude and Geomagnetic Activity

Space Weather
Abstract The errors of global geomagnetic models, such as the International Geomagnetic Reference Field and the World Magnetic Model (WMM), are well‐characterized at the Earth's surface, but their error behavior as a function of altitude and geomagnetic activity has not been quantified.
Manoj C Nair, Martin Fillion, Arnaud Chulliat, Samuel T Califf   +3 more
openaire   +1 more source

Van Allen Probes Observations of a Fundamental Poloidal Wave in the Plasmasphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract All past spacecraft observations of fundamental poloidal Alfvén (P1) waves attributed to ion drift resonance have been made outside the plasmasphere. In this study, we present the first spacecraft observations of a plasmaspheric P1 wave driven by that resonance.
Kazue Takahashi, Tomotsugu Yamakawa, Matina Gkioulidou, D. G. Mitchell, Jerry W. Manweiler   +4 more
wiley   +1 more source

RESPONSE OF BIOLOGICAL SYSTEMS TO GEOMAGNETIC STORMS

Acta Biomedica Scientifica, 2018
At present, influence of weak magnetic fields associated with solar and geomagnetic activity on biological systems is gaining more interest. Taking into account the accumulated data on the influence of geomagnetic storms on different biological levels ...
A. A. Bazhenov, M. V. Prikop, A. S. Averina, V. V. Sukhovskaya, A. V. Ukhova   +4 more
doaj   +1 more source

Simulating Inner Radiation Belt Electron Transport and Low‐Latitude Precipitation Driven by Disturbance Electric Fields

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract Increasing attention has been given to large‐scale disturbance electric fields in the inner radiation belt as a driver of drift‐periodic zebra stripe formations. Such disturbance electric fields have also been discussed as a possible driving mechanism of electron precipitation, transporting electrons below the inner belt and into the ...
S. D. Walton, S. Lejosne
wiley   +1 more source

High-latitude geomagnetically induced current events observed on very low frequency radio wave receiver systems [PDF]

, 2010
Noise burst events observed at Sodankylä, Finland, in the frequency range 20–25 kHz during January–April 2005 last up to 4 s, occur more often at midnight, are associated with high geomagnetic activity, and exhibit a quasi-constant amplitude perturbation
Dietrich, Sarah, Raita, Tero, Clarke, Ellen, Thomson, Alan W.P., Rodger, Craig J., Clilverd, Mark A., Ulich, Thomas, Kavanagh, Andrew J.   +7 more
core   +1 more source

Impact of Solar Radiation Pressure, Coriolis Force, and Exobase Conditions on Terrestrial Exospheric Density: MATE Simulation Results

Journal of Geophysical Research: Space Physics, Volume 131, Issue 11, November 2026.
Abstract We improved the Model for Analyzing the Terrestrial Exosphere (MATE), a kinetic exosphere model, by incorporating solar radiation pressure and Coriolis force arising from the Earth's revolution around the Sun, in addition to Earth's gravity, to investigate their impacts on the terrestrial exospheric hydrogen density. Under constant and uniform
Sang‐Yun Lee, Hyunju K. Connor
wiley   +1 more source