Results 71 to 80 of about 16,482 (212)

Joule Heating in the Northern Hemisphere During Geomagnetic Storms Driven by High‐Speed Streams and Coronal Mass Ejections

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract We present a robust method for estimating the auroral Joule heating in the northern hemisphere by combining SuperMAG, SuperDARN and AMPERE data products. This method is applied to 292 storms during 2010–2023. Temporal evolution and spatial distributions of the storm‐time Joule heating are studied using a superposed epoch analysis, with the ...
H. Vanhamäki, M. Pedersen, A. Aikio, C. Waters, J. Gjerloev, L. Cai, M. Myllymaa, B. Kunduri, K. Sterne, S. Vines, B. Anderson   +10 more
wiley   +1 more source

Coronal Heating from Alfvén Wave Turbulence in Solar Coronal Loops

, 2020
This work is supported by the NSF-REU Solar Physics program at SAO, grant number AGS-1850750.
openaire   +1 more source

Impulsively Excited Quasiperiodic Fast-propagating Waves in the Solar Corona

The Astrophysical Journal
Quasiperiodic fast-propagating (QFP) waves excited by an impulsive, spatially localized velocity perturbation in a curved coronal loop are investigated with three-dimensional numerical simulations.
Mijie Shi, Valery M. Nakariakov, Bo Li, Mingzhe Guo   +3 more
doaj   +1 more source

Alfvén Wave Connection between the Chromosphere and the Corona of the Sun: An Analytical Study

The Astrophysical Journal, 2023
Alfvén waves are closely relevant to the three outstanding problems in the solar corona: coronal heating, solar wind acceleration, and the fractionization of low first ionization potential (FIP) elements.
Jongchul Chae, Kyoung-Sun Lee
doaj   +1 more source

Case Study of Four Homologous Large-Scale Coronal Waves Observed on 2010 April 28 and 29

, 2011
On 2010 April 28 and 29, the Solar TErrestrial Relations Observatory B/Extreme Ultraviolet Imager observed four homologous large-scale coronal waves, the so-called EIT-waves, within 8 hr.
Attrill, Biesecker, Chen, Cohen, Gopalswamy, Kienreich, Long, Muhr, Patsourakos, Priest, Thompson, Veronig, Veronig, Veronig, Wang, Wills-Davey   +15 more
core   +1 more source

Global Ionospheric TEC Variability: Long‐Term Spectral–Wavelet Analysis and Geomagnetic Storm Event Case Studies

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract This study investigates global ionospheric variability using Global Total Electron Content (GTEC), defined as the spatial average of daily averaged Global Ionospheric Maps derived from the International GNSS Service. The analysis spans from 2010 to 2024, covering Solar Cycle 24 and the rising phase of Solar Cycle 25, and incorporates ...
Ramadane Hamed Linjouom Nsangou, Y. Reuveni   +1 more
wiley   +1 more source

STUDY OF SOLAR ENERGETIC PARTICLE ASSOCIATIONS WITH CORONAL EXTREME-ULTRAVIOLET WAVES [PDF]

The Astrophysical Journal, 2015
We study the relationship between large gradual solar energetic particle (SEP) events and associated extreme-ultraviolet (EUV) wave properties in 16 events that occurred between 2010 August and 2013 May and were observed by SDO, the Solar and Heliospheric Observatory (SOHO), and/or STEREO.
Jinhye Park, D. E. Innes, R. Bucik, Y.-J. Moon, S. W. Kahler   +4 more
openaire   +2 more sources

Energy and Mass Transport Associated with Impulsive Spicular Flows in Solar Coronal Holes

The Astrophysical Journal Letters
How the solar atmosphere is heated from a temperature of about 5000 to 6000 K in the lower atmosphere to about 1–2 MK in the corona has challenged the astrophysical community for nearly 80 yr.
Lei Ni, Jun Lin, Tanmoy Samanta, Guanchong Cheng, Yifu Wang, Robert Erdélyi   +5 more
doaj   +1 more source

Reconstruction of Two‐Dimensional Magnetohydrodynamic and Hall Magnetohydrodynamic Equilibria in Space Using Physics‐Informed Neural Networks

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract We present a novel data analysis technique based on physics‐informed neural networks (PINNs) to reconstruct two‐dimensional (2D) magnetohydrodynamic (MHD) and Hall MHD equilibria in a space plasma from in situ spacecraft measurements. Our method incorporates the steady‐state MHD or Hall MHD equations—a set of partial differential equations ...
Hiroshi Hasegawa, Eunjin Choi, Kyoung‐Joo Hwang, Kyunghwan Dokgo   +3 more
wiley   +1 more source

Propagating transverse waves in soft X-ray coronal jets [PDF]

, 2009
Aims. The theoretical model for magnetohydrodynamic (MHD) modes guided by a field-aligned plasma cylinder with a steady flow is adapted to interpret transverse waves observed in solar coronal hot jets, discovered with Hinode/XRT in terms of fast ...
Alexander, Aschwanden, Cirtain, Cooper, Culhane, E. Verwichte, Edwin, Ferrari, Golub, Goossens, Joarder, Koutchmy, Murawski, Murray, Nakariakov, Nakariakov, Nakariakov, Nishizuka, Ofman, Roberts, Ruderman, S. Vasheghani Farahani, Shibata, Shimojo, T. Van Doorsselaere, Terra-Homem, Tomczyk, V. M. Nakariakov, Van Doorsselaere, Verwichte, Williams, Yokoyama   +31 more
core   +1 more source