Results 91 to 100 of about 18,291 (244)

Toward a Dynamic Model for Topside Ionospheric Irregularities: Spherical Harmonic Decomposition

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Ionospheric irregularities arise from highly dynamic and turbulent processes related to magnetosphere‐ionosphere coupling and can lead to electromagnetic signal distortion or loss of lock events in global navigation satellite system signals, representing a hazard associated with space weather events. For this reason, understanding and modeling
S. Mestici, P. De Michelis, G. Consolini, A. Pignalberi, R. Tozzi, F. Giannattasio, F. Berilli   +6 more
wiley   +1 more source

Geoeffectiveness and efficiency of CIR, Sheath and ICME in generation of magnetic storms

, 2011
We investigate relative role of various types of solar wind streams in generation of magnetic storms. On the basis of the OMNI data of interplanetary measurements for the period of 1976-2000 we analyze 798 geomagnetic storms with Dst < -50 nT and their ...
Akasofu, Alves, Alves, Borovsky, Borovsky, Burlaga, Burton, Cane, D'Amicis, Denton, Despirak, Despirak, Dmitriev, Dungey, Echer, Echer, Echer, Fairfield, Gonzalez, Gonzalez, Gonzalez, Guo, Huttunen, Huttunen, Huttunen, I. G. Lodkina, Jian, Khabarova, King, Koskinen, Lepping, Longden, Lopez, M. Y. Yermolaev, Mustajab, N. S. Nikolaeva, Nikolaeva, Nikolaeva, Plotnikov, Pulkkinen, Pulkkinen, Richardson, Rostoker, Russell, Thatcher, Tsurutani, Tsurutani, Turner, Weigel, Xu, Y. I. Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Yermolaev, Zhang   +63 more
core   +1 more source

The Probability of the May 2024 Geomagnetic Superstorm

Space Weather
In May 2024, a series of coronal mass ejections resulted in the first “severe” (G4‐level) geomagnetic storm watch in nearly 20 years. This event evolved into a significant space weather event, including an “extreme” (G5) geomagnetic storm, moderate (S2 ...
S. Elvidge, D. R. Themens
doaj   +1 more source

Machine Learning‐Ready Data Sets for the Analysis and Nowcasting of Atmospheric Radiation at Aviation Altitudes

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Nowcasting and forecasting of the radiation environment in the Earth's lower atmosphere are critical for the safety of aircraft and spacecraft crews and passengers. Currently, this problem is addressed by employing statistical and physics‐based models that take into account particle transport and precipitation.
V. M. Sadykov, Z. M. Watkins, D. Kempton, W. Jones, S. K. C, G. T. Goodwin, X. He, W. K. Tobiska, I. Kitiashvili, C. Mertens, S. Ranjan, D. G. Deardorff, R. Spaulding   +12 more
wiley   +1 more source

Mid-latitude ionosphere during two great geomagnetic storms

Annals of Geophysics, 1996
The ionospheric disturbances observed at many European ionosonde stations in association with the severe geomagnetic storms occurring on 19-20 December 1980 and 11-12 April 1981 were investigated by using the available ionospheric and geomagnetic data ...
L. R. Cander, I. M. Vasiljevic
doaj   +1 more source

Relative Contributions of Solar Wind Dynamic Pressure and Interplanetary Electric Field on the Early Positive Part of Main Phase of Geomagnetic Storms

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The important early declining part of the main phase (MP) of geomagnetic storms in SYM‐H (and Dst) from positive main phase onset (MPO) to 0‐level of SYM‐H was somehow missed in the treatment of the storms. We included the missed part (or revised the storms) by raising the 0‐level of SYM‐H to MPO‐level, and showed that the inclusion is ...
Jijin K. Raj, N. Balan, Qing‐He Zhang, Y. Otsuka, K. Shiokawa, Zan‐Yang Xing, V. Manu, B. Nilam, Yu‐Zhang Ma, Yong Wang   +9 more
wiley   +1 more source

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

FalconSEED: First Year Review of the Solid‐State Energetic Electron Detector in Geosynchronous Orbit

Space Weather, Volume 24, Issue 3, March 2026.
Abstract We present results from Space Test Program Satellite‐6 (STP Sat‐6) in geosynchronous orbit. The electron detector, named SEED (Solid‐state Energetic Electron Detector) is built entirely from commercial‐off‐the‐shelf (COTS) parts. The instrument data show the electron environment over the entire energy range of detection(14keV−146keV) $(14 ...
J. D. Williams, R. A. Vincent, R. L. Balthazor, M. G. Mcharg, P. C. Neal, G. R. Wilson, A. J. Rogers, C. A. Maldonado, J. V. Rodriguez, A. Boudouridis, T. Leonard   +10 more
wiley   +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

TIE‐GCM ROPE—Part II: Dynamic Modeling

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Forecasting thermospheric density remains a critical challenge for satellite drag modeling and space situational awareness. Building on our previously introduced Reduced Order Probabilistic Emulator framework which compresses high‐dimensional Thermosphere‐Ionosphere‐ Electrodynamics General Circulation Model outputs into a low‐dimensional ...
Anirudh Tapedia, Daniele Sicoli, Piyush M. Mehta   +2 more
wiley   +1 more source