Results 141 to 150 of about 1,141,583 (297)
Using the Maximum X-ray Flux Ratio and X-ray Background to Predict Solar Flare Class
, 2015 We present the discovery of a relationship between the maximum ratio of the flare flux (namely, 0.5-4 Ang to the 1-8 Ang flux) and non-flare background (namely, the 1-8 Ang background flux), which clearly separates flares into classes by peak flux level.
Balasubramaniam, K., Winter, Lisa M.
core +1 more source
AGU Advances, Volume 6, Issue 4, August 2025.Abstract Cities play a crucial role in reducing global greenhouse gas emissions. While activity‐based (“bottom up”) emission estimates are widely used for global cities, they often lack independent verification. In this study, we use remotely‐sensed CO2 observations from the Orbiting Carbon Observatory‐3 (OCO‐3) to “top‐down” estimate CO2 emissions for
D. Y. Ahn +7 more
wiley +1 more source
Quasi-periodic Pulsations in Solar and Stellar Flares: An Overview of Recent Results (Invited Review) [PDF]
, 2016 Quasi-periodic pulsations (or QPPs) are periodic intensity variations in the flare emission that occur across all wavelength bands. In this article, we review the observational and modelling achievements since the previous review on this topic by ...
T. Van Doorsselaere +2 more
semanticscholar +1 more source
Solar PhysicsAbstract Solar flares commonly have a “hot onset precursor event” (HOPE), detectable from soft X-ray observations. To detect this requires subtraction of pre-flare fluxes from the non-flaring Sun prior to the event, fitting an isothermal emission model to the flare excess fluxes by comparing the GOES passbands at 1 – 8 Å and 0.5 – 4 Å, and ...
openaire +2 more sources
Journal of Cosmetic Dermatology, Volume 24, Issue 8, August 2025.ABSTRACT Background Rosacea is a chronic inflammatory skin condition primarily affecting the face, which greatly influences patients' quality of life and mental well‐being. Aim This research aimed to examine environmental and dietary factors, systemic comorbidities, and their effects on the quality of life and psychological impact of rosacea in Chinese
Namrata Kunwar +3 more
wiley +1 more source
Super active regions and production of major solar flares [PDF]
The success of imaging detectors with small fields of veiw such as HXIS or P/OF (Pinhole/Occulter Facility) depends heavily on pointing to the right place at the right time.
Bai, T.
core +1 more source
The Response of the Thermosphere to the 26 December 2019 Solar Eclipse
Geophysical Research Letters, Volume 52, Issue 14, 28 July 2025.Abstract This study investigates thermospheric response to the 2019 solar eclipse, focusing on temperature and neutral mass density variations at Wuhan and Beijing. The method proposed by Li et al. (2023, https://doi.org/10.1029/2022ja030988) to derive thermospheric parameters from electron density profiles was employed.
Shaoyang Li +5 more
wiley +1 more source
The Periodic and Temporal Behaviors of Solar X-Ray Flares in Solar Cycles 23 and 24
Astrophysical Journal, 2019 The recent solar cycles 23 and 24 are thought to be unusually quiet with more prolonged periods. Both sunspot groups and solar soft X-ray (SXR) flares show a decline in numbers comparable to cycles 21 and 22.
Jacob Oloketuyi, Yu Liu, Mingyu Zhao
semanticscholar +1 more source
Operational prediction of solar flares using a transformer-based framework. [PDF]
Sci Rep, 2023 Abduallah Y, Wang JTL, Wang H, Xu Y.
europepmc +1 more source
The correlation between soft and hard X-rays component in flares: from the Sun to the stars
, 2007 In this work we study the correlation between the soft (1.6--12.4 keV, mostly thermal) and the hard (20--40 and 60--80 keV, mostly non-thermal) X-ray emission in solar flares up to the most energetic events, spanning about 4 orders of magnitude in peak ...
Favata, F. +3 more
core +1 more source