Results 11 to 20 of about 27,428 (205)
Space Weather, 2023 Solar flares can severely disturb the Earth's ionosphere, leading to changes of atmospheric chemistry and degradation of Global Navigation Satellite System (GNSS) signals. The key to better assess these effects is to more accurately quantify the electron
Wei Xu +11 more
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Some studies on low-frequency signal in relation to X-ray flares and climatic conditions [PDF]
Annales Geophysicae, 1994 The statistical behaviour of the sudden enhancement in signal strength (SES) in relation to solar X-ray flares has been studied for the near east-west propagation of 40 kHz radio waves from Sanwa (36°11'N; 139°51'E) in Japan to Calcutta (22°34'N; 88 ...
S. K. Sarkar, B. K. De
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Remote Sensing, 2022 This work proposes a new indirect method to detect the impact of solar flares on ionospheric sounding measurements, i.e., on the signal-to-noise ratio of ionospheric reflected radio signals. The method allows us to detect and characterize the ionospheric
Victor de Paula +4 more
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The First AGILE Solar Flare Catalog
The Astrophysical Journal Supplement Series, 2023 We report the Astro-rivelatore Gamma a Immagini LEggero (AGILE) observations of solar flares, detected by the onboard anticoincidence system in the 80–200 keV energy range, from 2007 May 1 to 2022 August 31. In more than 15 yr, AGILE detected 5003 X-ray,
A. Ursi +11 more
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Measuring X-ray anisotropy in solar flares. Prospective stereoscopic capabilities of STIX and MiSolFA [PDF]
, 2017 During the next solar maximum, two upcoming space-borne X-ray missions, STIX on board Solar Orbiter and MiSolFA, will perform stereoscopic X-ray observations of solar flares at two different locations: STIX at 0.28 AU (at perihelion) and up to ...
Casadei, Diego +2 more
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On the classifications of the solar active regions (ARs); Case study for solar cycles 23 and 24
Egyptian Journal of Remote Sensing and Space Sciences, 2018 The declining phase of solar cycle 23 is an important case of study. Many high energetic solar flares occurred in 2003. The occurrence of high energetic solar X-ray flares (X-type) is related to solar cycle’s phases and the state of the active regions ...
Wael Mohamed +2 more
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The Astrophysical Journal, 2023 We present light curves and flares from a 7 day, multiwavelength observational campaign of AU Mic, a young and active dM1e star with exoplanets and a debris disk. We report on 73 unique flares between the X-ray to optical data.
Isaiah I. Tristan +15 more
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September 2017 Solar Flares Effect on the Middle Atmosphere
Remote Sensing, 2022 This paper examines the response of the upper atmosphere to increased radiation following exceptional solar activity in September 2017. The active region of the Sun AR2673 has caused intense solar-terrestrial disturbance. This active region has generated
Polina Pikulina +3 more
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The Astrophysical Journal, 2023 Three generations of the Miniature X-ray Solar Spectrometer (MinXSS) have flown on small satellites with the goal “to explore the energy distribution of soft X-ray (SXR) emissions from the quiescent Sun, active regions, and during solar flares, and to ...
Thomas N. Woods +13 more
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X-ray emission from solar neighbourhood flare stars [PDF]
Symposium - International Astronomical Union, 1990 A brief summary is given of a comprehensive analysis of EXOSAT observations of solar neighbourhood flare stars. Special attention is devoted to the discussion of quiescent X-ray emission and time variability.
R. Pallavicini +2 more
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