Results 71 to 80 of about 2,802,659 (186)

A Multi‐Event Comparison of dB/dt Resulting From Omega Band Aurora

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Omega bands are an auroral form occurring in the dawn sector which cause magnetic perturbations on the ground as they drift eastwards. If these changes in the magnetic field are large, omega bands can become a space weather hazard as the corresponding geomagnetically induced currents have the potential to cause damage to ground based ...
R. M. Hodnett, S. E. Milan, S. K. Vines, J. W. Gjerloev, L. J. Paxton   +4 more
wiley   +1 more source

Study on the Temporal Evolution of the Radial Differential Rotation of Solar Corona Using Radio Emissions

The Astrophysical Journal
The daily measurements of the disk-integrated solar radio flux, observed by the Radio Solar Telescope Network, at 245, 410, 610, 1415, 2695, 4995, and 8800 MHz during the time interval of 1989 January 1 to 2019 December 17, are used to investigate the ...
N. B. Xiang, X. H. Zhao, L. H. Deng, F. Y. Li, Y. J. Wang, X. W. Tan   +5 more
doaj   +1 more source

Geomagnetic Storms and Related Solar Phenomena (a. Precipitating Particles and Auroras) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I)

Antarctic Record, 1980
This is an attempt to identify the causes of geomagnetic storms which occurred during a year and a half from January 1977 to June 1978. The assignment of geomagnetic storm causation to appropriate coronal holes or solar flares has been made by ...
Katsuhide MARUHASHI, Takahiroo ISHI
doaj   +1 more source

Ground‐Based Solar Radio Observations From the Mexican e‐Callisto Stations During the May 2024 Extreme Space Weather Events

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The period from 1 to 14 May 2024 was marked by some of the most intense solar activity of Solar Cycle 25, including multiple X‐class flares, fast coronal mass ejections (CMEs), and diverse solar radio emissions. We present observations from the Mexican e‐Callisto network (REC‐Mx), including long‐duration continuum emissions (CTMs), Type II ...
E. Aguilar‐Rodriguez, G. Baron, R. Gutiérrez‐Zalapa, C. Y. Cruz‐Rodríguez, M. Rodriguez‐Martinez, M. A. Chacón, E. Romero‐Hernandez, K. S. Caballero‐Mora, J. Ramírez Vélez, E. Andrade‐Mascote, P. Villanueva‐Hernandez, I. A. Peralta‐Mendoza, J. Herrera, J. H. Castro‐Chacón, E. Perez‐Tijerina, J. A. Gonzalez‐Esparza, H. de León‐Hidalgo, R. Arceo‐Reyes, O. G. Morales‐Olivares, D. A. Garcia‐Sanchez, J. E. Perez‐Leon, C. Monstein, J. Bussons Gordo, M. Prieto Mateo   +23 more
wiley   +1 more source

The Efficiency of Harmonic Emissions Excited by Energetic Electrons in Coronal Loops

The Astrophysical Journal
Magnetic reconnection is a key process that drives the energy release in solar flares. This process can occur at multiple locations along the coronal loop.
Mehdi Yousefzadeh, Alexey Kuznetsov, Yao Chen, Mahboub Hosseinpour   +3 more
doaj   +1 more source

Emission Characteristics of Energetic Electrons with Crescent-shaped Velocity Distributions

The Astrophysical Journal
Solar flares release magnetic energy through reconnection, accelerating electrons into nonthermal velocity distributions, including crescent-shaped electron populations. These energetic electron distributions are crucial in driving instabilities that can
Mehdi Yousefzadeh
doaj   +1 more source

Radio Signature of the Strong Compression between a Streamer and a Coronal Hole Boundary

The Astrophysical Journal Letters
We present evidence of the first detection of the radio signature at metric wavelengths of the strong compression between a helmet streamer (HS) and the boundary of a coronal hole (CH) using radio observations from the Callisto MEXICO-LANCE and ALASKA ...
E. Aguilar-Rodriguez, A. Vourlidas, P. Corona-Romero, C. Monstein, W. D. Reeve, E. Romero-Hernandez, E. Andrade-Mascote, P. Villanueva-Hernandez, I. A. Peralta-Mendoza, J. E. Perez-Leon, E. Perez-Tijerina   +10 more
doaj   +1 more source

Simultaneous observations of changes in coronal bright point emission at the 20 cm radio and He Lambda 10830 wavelengths [PDF]

, 1986
Preliminary results of observations of solar coronal bright points acquired simultaneously from ground based observatories at the radio wavelength of 20 cm and in the He I wavelength 10830 line on September 8, 1985, are reported.
Habbal, Shadia R., Harvey, Karen L.
core  

MICROWAVE EMISSION OF SOLAR FLARES: CORONAL MASS EJECTIONS AND SHOCK WAVES

Odessa Astronomical Publications, 2017
Coronal  mass  ejections  (CMEs)  mostly affect  the  geomagnetic  field.  These  structures  are  observed  and  studied  with  coronagraphic  images  thereforewe don’t see the corona in the plane of the sky and  the measurements  of  the  propagation ...
E. A. Isaeva, Yu. T. Tsap
doaj   +1 more source

Imaging a Large Coronal Loop Using Type U Solar Radio Burst Interferometry

The Astrophysical Journal
Solar radio U-bursts are generated by electron beams traveling along closed magnetic loops in the solar corona. Low-frequency (
Jinge Zhang, Hamish A. S. Reid, Eoin Carley, Laurent Lamy, Pietro Zucca, Peijin Zhang, Baptiste Cecconi   +6 more
doaj   +1 more source