Results 21 to 30 of about 1,740 (142)

The March 1940 Superstorm: Geoelectromagnetic Hazards and Impacts on American Communication and Power Systems

Space Weather, Volume 21, Issue 6, June 2023., 2023
Abstract An analysis is made of geophysical records of the 24 March 1940, magnetic storm and related reports of interference on long‐line communication and power systems across the contiguous United States and, to a lesser extent, Canada. Most long‐line system interference occurred during local daytime, after the second of two storm sudden ...
Jeffrey J. Love, E. Joshua Rigler, Michael D. Hartinger, Greg M. Lucas, Anna Kelbert, Paul A. Bedrosian   +5 more
wiley   +1 more source

Radio seismology of the outer solar corona [PDF]

, 2013
Observed oscillations of coronal loops in EUV lines have been successfully used to estimate plasma parameters in the inner corona (< 0.2 R_0, where R_0 is the solar radius).
Brazhenko, A. I., Dorovskyy, V. V., Franzuzenko, A. V., Konovalenko, A. A., Melnik, V. N., Panchenko, M., Rucker, H. O., Zaqarashvili, T. V.   +7 more
core   +1 more source

Are Quasi-periodic Pulsations Independent of Loop Oscillations in Solar Flare?

The Astrophysical Journal, 2023
We investigated oscillations in an M8.7 solar flare (SOL2014-10-22), including quasi-periodic pulsations (QPPs) in light curves and Doppler shift oscillations in the flare loops.
Fanpeng Shi, Dong Li, Zongjun Ning, Yangfan Guo, Song Feng, Jun Xu   +5 more
doaj   +1 more source

Torsional Alfvén waves: magneto-seismology in static and dynamic coronal plasmas [PDF]

, 2011
Aims: We study the properties of torsional Alfvén waves in coronal loops so that they may be exploited for coronal seismological applications. Methods: The governing equation is obtained for standing torsional Alfvén waves of a dynamic, gravitationally
Andries, Andries, Aschwanden, Aschwanden, Aschwanden, Banerjee, Bonet, De Moortel, Del Zanna, Dymova, Dymova, Dymova, Edwin, Erdelyi, Erdelyi, Erdélyi, Erdélyi, Erdélyi, Erdélyi, Erdélyi, Erdélyi, Erdélyi, Fedun, Goossens, Goossens, Heyvaerts, Jess, Klimchuk, M. S. Ruderman, Morton, Morton, Morton, Morton, Morton, Ofman, R. Erdélyi, R. J. Morton, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Schrijver, Shelyag, Taroyan, Terradas, Terradas, Tomczyk, Tripathi, van Doorsselaere, Verth, Verth, Verth, Wang, Zaqarashvili, Zaqarashvili   +58 more
core   +1 more source

Nonlinear Fast Magnetosonic Waves in Solar Prominence Pillars

The Astrophysical Journal, 2023
We investigate the properties of nonlinear fast magnetosonic (NFM) waves in a solar prominence, motivated by recent high-resolution and high-cadence Hinode/Solar Optical Telescope (SOT) observations of small-scale oscillations in a prominence pillar.
Leon Ofman, Therese A. Kucera, C. Richard DeVore   +2 more
doaj   +1 more source

Coronal magnetic field measurement using loop oscillations observed by Hinode/EIS [PDF]

, 2008
We report the first spectroscopic detection of a kink MHD oscillation of a solar coronal structure by the Extreme-Ultraviolet Imaging Spectrometer (EIS) on the Japanese Hinode satellite. The detected oscillation has an amplitude of 1 kms−1 in the Doppler
Andries, Andries, Arregui, Aschwanden, Cirtain, Culhane, De Moortel, De Moortel, Dere, E. Verwichte, Kosugi, Landi, Mariska, McEwan, Nakariakov, Nakariakov, Nakariakov, Ofman, Ofman, Okamoto, P. R. Young, Roberts, Ruderman, T. Van Doorsselaere, Tomczyk, V. M. Nakariakov, Van Doorsselaere, Van Doorsselaere, Van Doorsselaere, Verth, Verwichte, Verwichte, Young   +32 more
core   +2 more sources

GLOBAL CORONAL SEISMOLOGY IN THE EXTENDED SOLAR CORONA THROUGH FAST MAGNETOSONIC WAVES OBSERVED BYSTEREOSECCHI COR1

The Astrophysical Journal, 2013
We present global coronal seismology for the first time, which allows us to determine inhomogeneous magnetic field strength in the extended corona. From the measurements of the propagation speed of a fast magnetosonic wave associated with a coronal mass ejection (CME) and the coronal background density distribution derived from the polarized radiances ...
Ryun-Young Kwon, Maxim Kramar, Tongjiang Wang, Leon Ofman, Joseph M. Davila, Jongchul Chae, Jie Zhang   +6 more
openaire   +1 more source

Radiative damping of standing acoustic waves in solar coronal loops [PDF]

, 2008
Context. A detailed understanding of the physical processes that determine the damping timescales of magneto-acoustic waves is essential to interpret diagnostic results from the application of solar magneto-seismology. Aims.
Berghmans, Bradshaw, Bradshaw, Bradshaw, Bradshaw, Bradshaw, De Moortel, De Moortel, De Moortel, De Moortel, De Pontieu, De Pontieu, De Pontieu, De Pontieu, Dere, Erdélyi, Feldman, Hansteen, Kliem, Landi, Mazzotta, McEwan, Mendoza-Briceño, Mendoza-Briceño, Mendoza-Briceño, Müller, Müller, Nakariakov, Nakariakov, Nakariakov, Ofman, Ofman, Porter, R. Erdélyi, Robbrecht, Roberts, S. J. Bradshaw, Sarro, Sigalotti, Spadaro, Taroyan, Taroyan, Taroyan, Teriaca, Tsiklauri, Wang, Wang, Wang, Wang   +48 more
core   +1 more source

Effect of longitudinal magnetic and density inhomogeneity on transversal coronal loop oscillations [PDF]

, 2008
Context. Observations of post-flare transversal coronal loop oscillations by TRACE have given us an excellent opportunity to implement magneto-seismological techniques for probing the plasma fine structure of the Sun's upper atmosphere. Aims.
Andries, Andries, Arregui, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Aschwanden, Banerjee, Brekke, Browning, De Moortel, DeForest, Dymova, Dymova, Dymova, Díaz, Edwin, Erdélyi, G. Verth, Gary, Goossens, Goossens, Hollweg, Klimchuk, Klimchuk, Lin, Lopéz Fuentes, Lopéz Fuentes, McClymont, McEwan, Nakariakov, O'Shea, R. Erdélyi, Rae, Roberts, Ruderman, Schrijver, Spruit, Terra-Homem, Van Doorsselaere, Van Doorsselaere, Vernazza, Verth, Verth, Verwichte, Watko, Winebarger, Winebarger, Winebarger   +50 more
core   +3 more sources

MHD Waves and Coronal Seismology: an overview of recent results

, 2012
Recent observations have revealed that MHD waves and oscillations are ubiquitous in the solar atmosphere, with a wide range of periods. We give a brief review of some aspects of MHD waves and coronal seismology which have recently been the focus of ...
Uchida Y., Wang T., Zajtsev V. V.
core   +2 more sources