Results 101 to 110 of about 1,290,320 (212)

Sudden Ionospheric Disturbances Generated by Solar Flares—Not so Sudden?

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It is known that solar flares generate instantaneous ionization enhancement, referred to as sudden ionospheric disturbance (SID), that occurs simultaneously across the entire dayside. In this work, we use high‐rate 1‐s data of total electron content (TEC) to analyse ionospheric response to 13 solar flares that occurred in 2003–2023.
B. Maletckii, E. Astafyeva, N. M. Pedatella, L. Qian   +3 more
wiley   +1 more source

MULTI-WAVELENGTH OBSERVATIONS OF A LARGE SOLAR FLARE

Odessa Astronomical Publications, 2019
We present the results of the multi- wavelength study of the two-ribbon solar flare on July 19, 2000 in the active region NOAA 9087. The evo- lution and morphological properties of the flare pro- ductive active region have been analyzed.
S N. Chornogor, N. N. Kondrashova
doaj   +1 more source

FEATURES OF THE DEVELOPMENT OF A CIRCULAR SOLAR FLARE

Odessa Astronomical Publications, 2020
We present the results of the analysis of morphology and evolution of the circular solar flare using H-alpha images. H-alpha filtergrams were obtained with the Meudon spectroheliograph.
S N. Chornogor, N. N. Kondrashova
doaj   +1 more source

Multiwavelength Study of M8.9/3B Solar Flare from AR NOAA 10960

, 2010
We present a multi-wavelength analysis of a long duration white-light solar flare (M8.9/3B) event that occurred on 4 June 2007 from NOAA AR 10960. The flare was observed by several spaceborne instruments, namely SOHO/MDI, Hinode/SOT, TRACE and STEREO ...
A. K. Srivastava, A.K. Srivastava, B. Filippov, B. Filippov, B. Kliem, B.P. Filippov, C. Liu, C.L. Gerrard, D. Nandy, D.M. Rust, D.R. Williams, G.A. Gary, H. Ji, H. Wang, H. Wang, J. Krall, J. Lin, K.H. Schatten, M.D. Altschuler, P. Kumar, P.C. Liewer, P.H. Scherrer, Pankaj Kumar, R. Liu, R.C. Canfield, S. Min, S. Tsuneta, S.F. Gissot, S.K. Antiochos, T. Amari, T. Török, T. Török, T.G. Forbes, T.T. Ishii, T.T. Ishii, W. Tend van, Wahab Uddin, Y. Fan, Y. Liu   +38 more
core   +1 more source

Pulsations in the Earth's Lower Ionosphere Synchronized With Solar Flare Emission [PDF]

, 2017
Solar flare emission at X‐ray and extreme ultraviolet (EUV) energies can cause substantial enhancements in the electron density in the Earth's lower ionosphere.
L. Hayes, P. Gallagher, J. McCauley, B. Dennis, J. Ireland, A. Inglis   +5 more
semanticscholar   +1 more source

Methane and Ethane Emission Rates, Intensities, and Trends: Aircraft Mass Balance Insights Over the Denver‐Julesburg Basin, Fall 2021

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Despite a 2.1‐fold increase in oil and gas (O&G) production from 2012 to 2021 in the Wattenberg Field (WF) area of the Denver‐Julesburg Basin (DJB), total methane (CH4) emissions have remained unchanged within measurement uncertainties (26.0 ± 6.8 t/hr in 2012, 24.0 ± 5 t/hr in 2015, and 21.4 ± 5.7 t/hr in 2021), while ethane (C2H6) emissions ...
H. M. Daley, R. R. Dickerson, P. Stratton, H. He, X. Ren, A. R. Koss, W. A. Brewer, S. Baidar, B. Hmiel, D. Bon, G. Pierce, P. Weibring, D. Richter, J. Walega, M. C. Ngulat, A. Santos, A. L. Hodshire, T. L. Vaughn, D. Zimmerle, A. Fried   +19 more
wiley   +1 more source

Initial Observations of Sunspot Oscillations Excited by Solar Flare

, 2007
Observations of a large solar flare of December 13, 2006, using Solar Optical Telescope (SOT) on Hinode spacecraft revealed high-frequency oscillations excited by the flare in the sunspot chromosphere.
A. G. Kosovichev, T. Sekii, Yoon T.-S.
core   +1 more source

Detection of Three-minute Oscillations in Full-disk Lyα Emission during a Solar Flare [PDF]

, 2017
In this Letter we report the detection of chromospheric 3-minute oscillations in disk-integrated EUV irradiance observations during a solar flare. A wavelet analysis of detrended Lyα (from GOES/EUVS) and Lyman continuum (from Solar Dynamics Observatory ...
R. Milligan, B. Fleck, J. Ireland, L. Fletcher, B. Dennis   +4 more
semanticscholar   +1 more source

Turbulent Kinetic Energy in the Energy Balance of a Solar Flare. [PDF]

Physical Review Letters, 2017
The energy released in solar flares derives from a reconfiguration of magnetic fields to a lower energy state, and is manifested in several forms, including bulk kinetic energy of the coronal mass ejection, acceleration of electrons and ions, and ...
E. P. Kontar, J. E. Pérez, J. E. Pérez, L. Harra, A. Kuznetsov, A. Emslie, N. Jeffrey, N. Bian, B. Dennis   +8 more
semanticscholar   +1 more source

Energy Deposition into the Ionosphere during a Solar Flare with Extreme-ultraviolet Late Phase

The Astrophysical Journal Letters
Solar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap for ...
Jing Liu, Liying Qian, Wenbin Wang, Kevin Pham, Xiangliang Kong, Yao Chen, Wenlong Liu, Libo Liu, Xuanqing Liu   +8 more
doaj   +1 more source