Results 81 to 90 of about 657 (236)

Real-time determination and monitoring of the auroral electrojet boundaries

Journal of Space Weather and Space Climate, 2013
A method for nowcasting of the auroral electrojet location from real-time geomagnetic data in the European sector is presented. Along the auroral ovals strong electrojet currents are flowing. The variation in the geomagnetic field caused by these auroral
Johnsen Magnar Gullikstad
doaj   +1 more source

On the Generation of Pre‐Sunrise Equatorial Plasma Bubbles in Southeast Asia During the Geomagnetic Storm of May 2024

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract A set of fresh Equatorial Plasma Bubbles (EPBs) formed during pre‐sunrise hours in the Southeast Asian sector amid the recovery phase of May 2024 geomagnetic storm. They offered new insights into their formation mechanism. This study used Total Electron Content (TEC) and Rate of TEC Index maps over Indonesia, along with ionosondes in Thailand ...
Sri Ekawati, Prayitno Abadi, Takuya Sori, Rezy Pradipta, Ihsan Naufal Muafiry, Teguh Nugraha Pratama, Agri Faturahman, Noersomadi, Febrylian Fahmi Chabibi, Punyawi Jamjareegulgarn   +9 more
wiley   +1 more source

Polytropic Index and Thermodynamic Behavior of the Central Plasma Sheet Near Lunar Distances

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract In addition to making near‐Earth observations, the THEMIS/ARTEMIS mission is uniquely positioned at lunar distance, in the deep magnetotail, reaching distances of 60 RE ${R}_{E}$ and further. This vantage point allows ARTEMIS to access the plasma sheet and measure entropy evolution across convective channels, plasma flow gradients ...
Ephrem Tesfaye Desta, R. D. Strauss, N. E. Engelbrecht   +2 more
wiley   +1 more source

Space magnetometry: mapping Earth’s magnetic field with satellites

Earth, Planets and Space
Magnetic measurements from low earth orbiting (LEO) satellites have revolutionised our ability to globally map Earth’s magnetic field. This paper reviews the processing and calibration of satellite magnetometer data from both dedicated magnetic field ...
Nils Olsen
doaj   +1 more source

Bow Shock Current Closure Through the Magnetosheath for Non‐Zero IMF By—Results From Hybrid Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The bow shock current (BSC) flows on the bow shock due to the compression of the interplanetary magnetic field (IMF) across the shock. Although previous studies have shown that the BSC can connect to magnetospheric current systems via the magnetosheath, it is still not known how this happens.
G. Semrén, M. Hamrin, S. Fatemi, E. Krämer, L. Macke, T. Karlsson, T. Pitkänen, P. Dredger, R. E. Lopez, O. Goncharov, S. E. Milan   +10 more
wiley   +1 more source

The CHAOS-8 geomagnetic field model

Earth, Planets and Space
Abstract We present CHAOS-8, an extension of the CHAOS field model series that describes the time-dependent near-Earth geomagnetic field, valid from 1999 to 2025. It is estimated from magnetic measurements collected by multiple low-earth-orbit satellites, such as CHAMP and Swarm
C. Kloss, C. C. Finlay, N. Olsen, L. Tøffner-Clausen, N. Gillet, A. Grayver   +5 more
openaire   +1 more source

MMS Observations of Multi‐Species Wave‐Particle Interactions and Rapid Foreshock Evolution

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The ion foreshock is the region upstream of Earth's bow shock where magnetic field lines connect to the quasi‐parallel shock surface. Within this region, there exist a variety of backstreaming ion populations from the shock ramp that can generate ultra‐low frequency (ULF) waves through wave‐particle interactions. In this work, we use data from
Guan Le, Xochitl Blanco‐Cano, Yuxi Chen, Megha Pandya, Gangkai Poh, Hanying Wei, Scott Boardsen, Poshan Belbase, Christopher T. Russell, Daniel J. Gershman, Ian J. Cohen, S. A. Fuselier   +11 more
wiley   +1 more source

Excitation of Large Amplitude Compressional ULF Waves in the Magnetosphere by Solar Wind Pressure Spikes and IMF Southward Turning

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We present a case study of large amplitude, compressional Pc5 waves observed by GOES 13 and 15 at geosynchronous orbit near noon. These waves were excited near the arrival time of two consecutive solar wind dynamic pressure spikes at the magnetopause, the second of which was associated with a large and rapid southward turning of the ...
C. Lazzeri, C. Forsyth, A. Samsonov, A. Fazakerley, M. Archer, T. Elsden, K. J. Trattner, J. Rae, A. W. Degeling   +8 more
wiley   +1 more source

Geomagnetic response to solar and interplanetary disturbances

Journal of Space Weather and Space Climate, 2013
The space weather discipline involves different physical scenarios, which are characterised by very different physical conditions, ranging from the Sun to the terrestrial magnetosphere and ionosphere.
Saiz Elena, Cerrato Yolanda, Cid Consuelo, Dobrica Venera, Hejda Pavel, Nenovski Petko, Stauning Peter, Bochnicek Josef, Danov Dimitar, Demetrescu Crisan, Gonzalez Walter D., Maris Georgeta, Teodosiev Dimitar, Valach Fridich   +13 more
doaj   +1 more source

O regionalnom modeliranju geomagnetskog glavnog polja

Geofizika, 2007
U ovom istraživanju primijenila sam Sfernu harmoničku analizu na kuglinoj kaloti, (Spherical cap harmonic analyses), SCHA, s fizikalnom regularizacijom na nizu sintetskih podataka koji su dobiveni CM4 modelom (Comprehensive Model CM4) (Sabaka i sur., 2004) na lokacijama 46 Europskih opservatorija i 11 dodatnih opservatorija koji su izabrani radi ...
openaire   +2 more sources