Results 111 to 120 of about 23,807 (281)

What is a geomagnetic storm?

Journal of Geophysical Research: Space Physics, 1994
After a brief review of magnetospheric and interplanetary phenomena for intervals with enhanced solar wind‐magnetosphere interaction, an attempt is made to define a geomagnetic storm as an interval of time when a sufficiently intense and long‐lasting interplanetary convection electric field leads, through a substantial energization in the magnetosphere‐
Gonzalez, W., Joselyn, J., Kamide, Y., Kroehl, H., Rostoker, G., Tsurutani, B., Vasyliūnas, V.   +6 more
openaire   +3 more sources

Derivation of Ambient Electron Density Using Spacecraft Potential Measurements From the MMS and Van Allen Satellites: Application to the Plasmasphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract We investigate the empirical relationship between the spacecraft potential (Vs) measured by the Electric Field Double Probes, and the electron density (Ne) measured by the Fast Plasma Instrument on the MMS spacecraft. We derive their relationship during fast‐mode intervals when the Active Spacecraft Potential Control Devices are off.
H. Laakso, G. Le, R. Pfaff, S. Boardsen, K. Nykyri   +4 more
wiley   +1 more source

Occurrence of ionospheric scintillation during geomagnetic storms in Indonesia (2003–2024) using superposed epoch analysis

Earth and Planetary Physics
Ionospheric scintillation refers to rapid radio signal amplitude and phase fluctuations due to small-scale irregularities in the ionosphere. Occurring primarily at equatorial and low latitudes, scintillation is linked to equatorial plasma bubbles (EPBs),
Angga Yolanda Putra, Theodosius Marwan Irnaka, Prayitno Abadi, La Ode Muhammad Musafar Kilowasid, Fitri Nuraeni, Erlansyah, Suraina, Afif Rakhman   +7 more
doaj   +1 more source

Unveiling the combined effects of neutral dynamics and electrodynamic forcing on dayside ionosphere during the 3-4 February 2022 "SpaceX" geomagnetic storms. [PDF]

Sci Rep, 2023
Kakoti G, Bagiya MS, Laskar FI, Lin D.
europepmc   +1 more source

Correlating the interplanetary factors to distinguish extreme and major geomagnetic storms [PDF]

, 2021
R. V. Balachandran, Li‐Jen Chen, Shan Wang, Mei‐Ching Fok   +3 more
openalex   +1 more source

Satellites to study geomagnetic storms [PDF]

Eos, Transactions American Geophysical Union, 2007
NASA's Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission to study geomagnetic substorms over the next two years launched on 17 February from Cape Canaveral Air Force Station, Fla. Substorms are visible in the atmosphere as a sudden brightening of polar auroral ribbons as they split and reorganize, and are thought to ...
openaire   +1 more source

Assessment of the Generation of Traveling Ionospheric Disturbances by Solar Terminators

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract The generation of traveling ionospheric disturbances (TIDs) near solar terminators has been predicted, and several studies have reported the detection of TIDs associated with sunrise. However, there are also observations that do not show TID signatures at sunrise.
Hyosub Kil, Andrew K. Sun, Se‐Heon Jeong, Woo Kyoung Lee, Jeong‐Heon Kim, Jiyun Lee   +5 more
wiley   +1 more source

B2 Thickness Parameter Response to Equinoctial Geomagnetic Storms. [PDF]

Sensors (Basel), 2021
Migoya-Orué Y, Alazo-Cuartas K, Kashcheyev A, Amory-Mazaudier C, Radicella S, Nava B, Fleury R, Ezquer R.   +7 more
europepmc   +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

Characterizing North‐South Ionospheric Gradients During Geomagnetic Storms: A Variogram Enhancement for Wide Area Ionospheric Models

Space Weather, Volume 24, Issue 1, January 2026.
Abstract The intensified solar maximum of Cycle 25 has heightened space weather risks to Global Navigation Satellite Systems (GNSS), where geomagnetic storms critically challenge Positioning, Navigation, and Timing (PNT) availability. Current wide‐area ionospheric models may fail to resolve extreme latitudinal Total Electron Content (TEC) gradients ...
Tong Liu, Yiping Jiang, Bo Chen, Jian Liu, Yufang He, Wu Chen   +5 more
wiley   +1 more source