Results 1 to 10 of about 1,041,432 (241)

Hemispheric comparison of solar flare associated cosmic noise absorption (SCNA) from high latitude stations: Maitri (70.75°S, 11.75°E) and Abisko (68.4°N, 18.9°E)

Frontiers in Astronomy and Space Sciences
The effects of solar flares in the D-region ionosphere at two high-latitude stations: Maitri (70.75°S, 11.75°E) and Abisko (68.4°N, 18.9°E), located in different hemispheres are studied. We analyzed 37 M-class flares and 6 X-class flares of the year 2014,
Shipra Sinha, Shipra Sinha, Geeta Vichare, A. K. Sinha   +3 more
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Solar flare

Materials Today, 2011
Fakhouri, Sami M., Zhang, Lei, Briseno, Alejandro L.   +2 more
  +5 more sources

Solar Flare Activity, 1937–2024: Introducing the New Hemispheric Solar Flare Index (hSFI) in the Context of 2024's Major Solar Storm Events

Space Weather
A new daily composite of the solar flare index (SFI) and the hemispherically‐resolved versions (hSFI) are presented for 1937 to 2024. The data set confirms that the northern hemisphere (NH) dominated solar flare activity during Solar Cycles 17 to 21, but
V. M. Velasco Herrera, W. Soon, S. Knoška, A. Özgüç, G. Velasco Herrera, H. Yeşilyaprak, N. Babynets, M. Švanda, J. Muraközy, S. Qiu, D. Riveros‐Rosas, R. Connolly, M. Connolly, A. Tlatov, L. Cappellotto   +14 more
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Image Synthesis for Solar Flare Prediction

The Astrophysical Journal Supplement Series
Solar flare prediction is a topic of interest to many researchers owing to the potential of solar flares to affect various technological systems, both terrestrial and in orbit.
Elad Amar, Ohad Ben-Shahar
doaj   +1 more source

A magnetic avalanche as the central engine powering a solar flare

Astronomy & Astrophysics
Solar flares are the most powerful, magnetically driven, explosions in the heliosphere. The nature of magnetic energy release in the solar corona that heats the plasma and accelerates particles in a flare, however, remains poorly understood.
Chitta L. P., Pontin D. I., Priest E. R., Berghmans D., Kraaikamp E., Rodriguez L., Verbeeck C., Zhukov A. N., Krucker S., Aznar Cuadrado R., Calchetti D., Hirzberger J., Peter H., Schühle U., Solanki S. K., Teriaca L., Giunta A. S., Auchère F., Harra L., Müller D.   +19 more
doaj   +1 more source

Small-scale and transient extreme ultraviolet kernels in solar flare ribbons

Astronomy & Astrophysics
Aims. Flare ribbons form when energy released by coronal magnetic reconnection is deposited in the low layers of the solar atmosphere. Therefore, by studying the dynamics of flare ribbons, one obtains an indirect measurement of reconnection in the corona.
Collier H., Krucker S., Hayes L. A., Kraaikamp E., Berghmans D., Ryan D. F.   +5 more
doaj   +1 more source

Dual-stage Flare Prediction Using a Full-disk Flare Index: Trend-disturbance Decomposition and Hybrid Forecasting Model

The Astrophysical Journal Supplement Series
Accurate prediction of solar flares is essential for space weather warnings and safeguarding technological infrastructure. This study proposes a dual-stage flare prediction framework leveraging the full-disk flare index (FI).
Shuainan Yan, Yanxia Cai, Bingxian Luo, Liqin Shi, Yanmei Cui   +4 more
doaj   +1 more source

Disentangling Thermal and Abundance Characteristics in a Solar Flare Using SDO/AIA, Hinode/XRT, and MinXSS-1 Observations

The Astrophysical Journal
We investigate the thermal properties of a solar flare by the observations of the soft X-ray Telescope on board Hinode and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory. Our analysis reveals a tenuous but hot plasma cloud
Xiaoyan Xie, Anna Chen, Crisel Suarez, Katharine K. Reeves, Soumya Roy, Christopher S. Moore, Nishu Karna, Joy Velasquez   +7 more
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Particle Acceleration in Solar Flares [PDF]

International Astronomical Union Colloquium, 1989
AbstractParticle acceleration during solar flares is a complex process where the main ‘actors’ (Direct (D.C.) or turbulent electric fields) are hidden from us. It is easy to construct a successful particle accelertion model if we are allowed to impose on the flaring region arbitrary conditions (e.g., strength and scale length of the D.C.
openaire   +1 more source

Turbulent acceleration in solar flares [PDF]

The Astrophysical Journal Supplement Series, 1994
AbstractTurbulent acceleration in the impulsive phase of solar flares is reviewed, with the emphasis on bulk energization of nonrelativistic electrons and prompt acceleration of the gamma-ray emitting nonrelativistic ions and relativistic electrons. The primary energy release in a flare cannot be due to collisional dissipation.
openaire   +1 more source