Results 121 to 130 of about 1,290,320 (212)

Solar flare effects on D-region ionosphere using VLF measurements during low- and high-solar activity phases of solar cycle 24

Earth, Planets and Space, 2018
The effects of solar flares on the propagation of subionospheric VLF signals from NWC and NLK transmitter stations monitored at a low-latitude station, Suva (18.2°S, 178.4°E), Fiji, between December 2006 and December 2010 (an unprecedented solar minimum ...
Abhikesh Kumar, Sushi I Kumar
semanticscholar   +1 more source

Mars Thermospheric Polar Warming at Aphelion: Dynamical Processes Studied Using M‐GITM

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Aphelion Thermospheric Polar Warming (TPW), first identified in 2024 by Mars Atmosphere and Volatile EvolutioN (MAVEN) observations, is a dynamical heating phenomenon in the Martian atmosphere that exists in the winter hemisphere near the aphelion solstice.
Jia‐Zheng Li, Stephen W. Bougher, Cheng Li, Erdal Yiğit   +3 more
wiley   +1 more source

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
doaj   +1 more source

Geoeffectiveness of Coronal Mass Ejections in the SOHO era

, 2014
The main objective of the study is to determine the probability distributions of the geomagnetic Dst index as a function of the coronal mass ejection (CME) and solar flare parameters for the purpose of establishing a probabilistic forecast tool for the ...
Devos, Andy, Dumbovic, Mateja, Leer, Kristoffer, Rodriguez, Luciano, Ruzdjak, Domagoj, Sudar, Davor, Vennerstrom, Susanne, Veronig, Astrid, Vrsnak, Bojan   +8 more
core   +1 more source

Human‐Interpretable SEP Event Prediction Using White‐Box Explainable AI

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Solar energetic particle (SEP) events pose radiation risks to astronauts and space systems, making their prediction essential. Although various prediction models have been developed, most machine learning (ML)‐based models lack interpretability; that is, it is difficult to explain the reasons behind individual predictions.
Naho Fujita, Yuta Kato, Kanya Kusano, Takashi Yanase, Chihiro Mitsuda   +4 more
wiley   +1 more source

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
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

Seismic Emissions from a Highly Impulsive M6.7 Solar Flare

, 2008
On 10 March 2001 the active region NOAA 9368 produced an unusually impulsive solar flare in close proximity to the solar limb. This flare has previously been studied in great detail, with observations classifying it as a type 1 white-light flare with a ...
A. Kosovichev, A.-C. Donea, A.-C. Donea, A.-C. Donea, A.-C. Donea, C. Lindsey, D. Besliu-Ionescu, H. Moradi, H. Moradi, J. Aboudarham, J. C. Martínez-Oliveros, J.C. Martínez-Oliveros, J.J. Sudol, J.P. Li, M. Aschwanden, M.D. Ding, M.E. Machado, R. Chandra, S.P. Rajaguru, V.V. Zharkova, V.V. Zharkova, V.V. Zharkova, W. Uddin, Y. Liu   +23 more
core   +3 more sources

Reconstructing Historical Solar Indices for Predicting Past Space Weather Events

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Modeling and forecasting the near‐Earth space environment, specifically the thermosphere, is particularly important because it affects the motion of low‐Earth orbit objects through atmospheric drag. Solar indices such as F10.7, S10.7, M10.7, and Y10.7 are commonly used as inputs to ionospheric and thermospheric density models.
Poshan Belbase, Denny M. Oliveira, Theodosios Chatzistergos, Gangkai Poh, Eftyhia Zesta   +4 more
wiley   +1 more source

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