Results 71 to 80 of about 13,868 (214)

The large longitudinal spread of solar energetic particles during the January 17, 2010 solar event

, 2012
We investigate multi-spacecraft observations of the January 17, 2010 solar energetic particle event. Energetic electrons and protons have been observed over a remarkable large longitudinal range at the two STEREO spacecraft and SOHO suggesting a ...
A. Klassen, A. Klassen, A.B. Galvin, A.M. Veronig, A.P. Rouillard, B. Heber, B.R. Ragot, D.V. Reames, E.W. Cliver, E.W. Cliver, E.W. Cliver, G. Wibberenz, G.E. Brueckner, H.V. Cane, J. Torsti, J.E. Borovsky, J.E. Mazur, J.G. Luhmann, J.L. Bougeret, J.L. Bougeret, J.P. Delaboudinière, J.P. Wuelser, J.R. Jokipii, J.R. Jokipii, K.L. Klein, M.B. Kallenrode, M.H. Acuña, N. Dresing, R. Gómez-Herrero, R. Müller-Mellin, R. Müller-Mellin, R.A. Howard, R.A. Mewaldt, R.B. McKibben, R.E. Gold, S. Dalla, S. Dalla, T. Rosenvinge Von, T.R. Sanderson, V.V. Grechnev, W. Dröge, W. Dröge, W. Dröge, Y. Kartavykh   +43 more
core   +1 more source

How Does the Definition of a Geomagnetic Storm Affect the Contents of the Resulting Storm List?

Space Weather, Volume 24, Issue 5, May 2026.
Abstract A geomagnetic storm is a significant and prolonged disturbance of the Earth's magnetic field caused by an enhancement of the ring current. Storms are typically identified using magnetic field measurements from multiple ground‐based magnetometers, and the corresponding dates and times of multiple storms can be collated to form a storm list ...
Atlas M. Patrick, John C. Coxon, Sarah N. Bentley, Maria‐Theresia Walach, Kyle R. Murphy, I. Jonathan Rae, Isobel S. Lockley   +6 more
wiley   +1 more source

Relativistic Proton Production During the 14 July 2000 Solar Event: The Case for Multiple Source Mechanisms

, 2006
Protons accelerated to relativistic energies by transient solar and interplanetary phenomena caused a ground-level cosmic ray enhancement on 14 July 2000, Bastille Day.
Bieber J. W., Cane H. V., D. J. Bombardieri, Fluckiger E., Humble J. E., J. E. Humble, K. J. Michael, M. L. Duldig, McCracken K. G., Rao U. R., Reiner M. J., Shea M. A.   +11 more
core   +1 more source

Predicting CME Arrivals From L5 Heliospheric Imagers: The Impact of HI Track Length

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The Solar TErrestrial RElations Observatory (STEREO) mission has laid a foundation for advancing real‐time space weather forecasting by enabling the evaluation of heliospheric imager (HI) data for predicting coronal mass ejection (CME) arrivals at Earth.
T. Amerstorfer, J. Le Louëdec, D. Barnes, M. Bauer, J. A. Davies, S. Majumdar, E. Weiler, C. Möstl   +7 more
wiley   +1 more source

The acceleration and propagation of solar flare energetic particles [PDF]

Observations and theories of particle acceleration in solar flares are reviewed. The most direct signatures of particle acceleration in flares are gamma rays, X-rays and radio emissions produced by the energetic particles in the solar atmosphere and ...
Forman, M. A., Holzer, T. E., Mihalas, D., Ramaty, R., Sturrock, P. A., Ulrich, R. K., Zweibel, E. G.   +6 more
core   +1 more source

Acceleration Rates and Injection Efficiencies in Oblique Shocks [PDF]

, 1995
The rate at which particles are accelerated by the first-order Fermi mechanism in shocks depends on the angle, \teq{\Tbone}, that the upstream magnetic field makes with the shock normal.
Baring, M. G., Ellison, D. C., Jones, F. C.   +2 more
core   +2 more sources

A Robust Empirical Relationship Between Speed and Turbulence Energy in the Near‐Earth Solar Wind

Space Weather, Volume 24, Issue 5, May 2026.
Abstract The connection between turbulence and solar‐wind acceleration, long known in space physics, is further developed in this study by establishing a robust empirical law that relates the bulk‐flow speed to the magnetohydrodynamic‐scale fluctuation energy in the plasma. The model is based on analysis of 25 years of near‐Earth observations by NASA's
Rohit Chhiber, Yanwen Wang, Manuel E. Cuesta, Jiaming Wang, Sohom Roy   +4 more
wiley   +1 more source

Modeling Particle Acceleration and Release from Solar Eruptions

The Astrophysical Journal
Determining the relative contribution of solar flares versus coronal mass ejections in large solar energetic particle (SEP) events is a long-standing problem.
Xiaocan Li, Joel Dahlin, Fan Guo, Bin Zhuang, Sophie Masson, Spiro Antiochos   +5 more
doaj   +1 more source

Particle acceleration in solar flares [PDF]

The most direct signatures of particle acceleration in flares are energetic particles detected in interplanetary space and in the Earth atmosphere, and gamma rays, neutrons, hard X-rays, and radio emissions produced by the energetic particles in the ...
Forman, M. A., Ramaty, R.
core   +1 more source

Updates, Examples and Validation of the Global Ionosphere Thermosphere Model

Space Weather, Volume 24, Issue 5, May 2026.
Abstract This study provides an updated description, example simulations, and validation of the Global Ionosphere Thermosphere Model (GITM). The updates to GITM include using an exothermic semi‐implicit chemistry scheme that no longer requires an altitude dependent heating efficiency; an ionospheric wind‐driven dynamo; improved neutral, ion, and ...
A. J. Ridley, C. Wu, A. Bukowski, J. Bell   +3 more
wiley   +1 more source