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Solar flares are complicated physical phenomena that are observable in a broad range of the electromagnetic spectrum, from radiowaves to $\gamma$-rays. For a more comprehensive understanding of flares, it is necessary to perform a combined…

Solar and Stellar Astrophysics · Physics 2017-08-02 Viacheslav M Sadykov , Alexander G Kosovichev , Vincent Oria , Gelu M Nita

Solar flares are transient yet dramatic events in the atmosphere of the Sun, during which a vast amount of magnetic energy is liberated. This energy is subsequently transported through the solar atmosphere or into the heliosphere, and…

Solar and Stellar Astrophysics · Physics 2022-12-14 Graham S. Kerr

Accurate and reliable predictions of solar flares are essential due to their potentially significant impact on Earth and space-based infrastructure. Although deep learning models have shown notable predictive capabilities in this domain,…

Machine Learning · Computer Science 2024-11-28 Temitope Adeyeha , Chetraj Pandey , Berkay Aydin

Recently, there has been growing interest in the use of machine-learning methods for predicting solar flares. Initial efforts along these lines employed comparatively simple models, correlating features extracted from observations of…

Solar and Stellar Astrophysics · Physics 2023-06-21 Varad Deshmukh , Srinivas Baskar , Elizabeth Bradley , Thomas Berger , James D. Meiss

A workshop was recently held at Nagoya University (31 October - 02 November 2017), sponsored by the Center for International Collaborative Research, at the Institute for Space-Earth Environmental Research, Nagoya University, Japan, to…

Indications are presented for a significant connection between the relative motion of the planets and the appearance of energetic solar flares. Based on the records of the last four decades, the analysis highlights remarkable features and a…

Solar and Stellar Astrophysics · Physics 2021-08-25 Eleni Petrakou , Iasonas Topsis Giotis

The spot evolution on the Sun and solar-type stars is important for understanding the nature of consequential flaring activity. This study statistically investigates the variance of flare occurrence rate through the time evolution of spots…

Solar and Stellar Astrophysics · Physics 2025-05-23 Takato Tokuno , Kosuke Namekata , Hiroyuki Maehara , Shin Toriumi

We present a case study of solar flare forecasting by means of metadata feature time series, by treating it as a prominent class-imbalance and temporally coherent problem. Taking full advantage of pre-flare time series in solar active…

Solar and Stellar Astrophysics · Physics 2021-05-26 Azim Ahmadzadeh , Berkay Aydin , Manolis K. Georgoulis , Dustin J. Kempton , Sushant S. Mahajan , Rafal A. Angryk

Flares are a well-studied aspect of the Sun's magnetic activity. Detecting and classifying solar flares can inform the analysis of contamination caused by stellar flares in exoplanet transmission spectra. In this paper, we present a…

Solar and Stellar Astrophysics · Physics 2024-06-25 Nicole Hao , Laura Flagg , Ray Jayawardhana

A crucial challenge to successful flare prediction is forecasting periods that transition between "flare-quiet" and "flare-active". Building on earlier studies in this series (Barnes et al. 2016; Leka et al. 2019a,b) in which we describe…

The triggering mechanism(s) and critical condition(s) of solar flares are still not completely clarified, although various studies have attempted to elucidate them. We have also proposed a theoretical flare-trigger model based on MHD…

Solar and Stellar Astrophysics · Physics 2018-04-04 Yumi Bamba , Kanya Kusano

Solar flare prediction is a central problem in space weather forecasting and recent developments in machine learning and deep learning accelerated the adoption of complex models for data-driven solar flare forecasting. In this work, we…

Machine Learning · Computer Science 2023-09-12 Chetraj Pandey , Anli Ji , Rafal A. Angryk , Berkay Aydin

Monitoring of the Sun and its activity is a task of growing importance in the frame of space weather research and awareness. Major space weather disturbances at Earth have their origin in energetic outbursts from the Sun: solar flares,…

Solar and Stellar Astrophysics · Physics 2016-02-09 Astrid M. Veronig , Werner Pötzi

Every 11 years, the Sun goes through periods of activity, with the occurrence of many solar flares and mass ejections, both energetic phenomena of magnetic origin. Due to its effects on Earth, the study of solar activity is of paramount…

Solar and Stellar Astrophysics · Physics 2023-09-14 Vanessa Lessa , Adriana Valio

We describe a new tool developed for solar flare forecasting on the base of some sunspot group properties. Assuming that the flare frequency follows the Poisson statistics, this tool uses a database containing the morphological…

Solar and Stellar Astrophysics · Physics 2019-05-16 M. Falco , P. Costa , P. Romano

The most powerful explosions on the Sun [...] drive the most severe space-weather storms. Proxy records of flare energies based on SEPs in principle may offer the longest time base to study infrequent large events. We conclude that one…

We use Renewal Theory for the estimation and interpretation of the flare rate from the Geostationary Operational Environmental Satellite (GOES) soft X-ray flare catalogue. It is found, that in addition to the flare rate variability with the…

Solar and Stellar Astrophysics · Physics 2015-03-20 Andrei Gorobets , Mauro Messerotti

Space weather events may cause damage to several fields, including aviation, satellites, oil and gas industries, and electrical systems, leading to economic and commercial losses. Solar flares are one of the most significant events, and…

Solar and Stellar Astrophysics · Physics 2020-06-25 T. Cinto , A. L. S. Gradvohl , G. P. Coelho , A. E. A. da Silva

A method for a time-dependent search for flaring astrophysical sources which can be potentially detected by large neutrino experiments is presented. The method uses a time-clustering algorithm combined with an unbinned likelihood procedure.…

Instrumentation and Methods for Astrophysics · Physics 2015-03-19 D. Gora , E. Bernardini , A. H Cruz Silva

Solar flares are large-scale releases of energy in the solar atmosphere, which are characterised by rapid changes in the hydrodynamic properties of plasma from the photosphere to the corona. Solar physicists have typically attempted to…

Solar and Stellar Astrophysics · Physics 2012-06-26 S. Adamakis , C. L. Raftery , R. W. Walsh , P. T. Gallagher