Results 51 to 60 of about 16,880 (179)

Solar Activity and Energy [PDF]

By performing various activities to model the magnetic fields around the sun, students will gain an understanding of how the restructuring of these magnetic fields can cause a variety of seemingly unrelated shapes and phenomena.

core   +1 more source

Laboratory-generated Coronal Mass Ejections [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractWe have begun a series of laboratory experiments focused on understanding how coronal mass ejections (CME) interact and evolve in the solar wind. The experiments make use of the Helicon-Cathode (HelCat) plasma facility, and the Plasma Bubble eXperiment (PBeX).
Christopher Watts, Yue Zhang, Alan Lynn, Ward Manchester, C. Nick Arge   +4 more
openaire   +1 more source

Radio Observations of Coronal Mass Ejections: Space Weather Aspects

Frontiers in Astronomy and Space Sciences, 2020
We review the current state-of-affairs in radio observations of Coronal Mass Ejections (CMEs) from a Space Weather perspective. In particular, we examine the role of radio observations in predicting or presaging an eruption, in capturing the formation ...
Angelos Vourlidas, Eoin P. Carley, Nicole Vilmer, Nicole Vilmer   +3 more
doaj   +1 more source

Halo Coronal Mass Ejections during Solar Cycle 24: reconstruction of the global scenario and geoeffectiveness [PDF]

, 2017
In this study we present a statistical analysis of 53 fast Earth-directed halo CMEs observed by the SOHO/LASCO instrument during the period Jan. 2009-Sep.
Messerotti, Mauro, Poedts, Stefaan, Rodriguez, Luciano, Scolini, Camilla   +3 more
core   +4 more sources

Global Coronal Mass Ejections

The Astrophysical Journal, 2007
Observations of the low solar corona in the extreme ultraviolet and in soft X-rays evidence a close relationship of coronal dimmings and coronal mass ejections (CMEs). Dimmings are usually interpreted as places of plasma evacuation during a CME. We characterize a CME by the apparent angular extent of associated dimmings above the solar limb and define ...
Andrei N. Zhukov, Igor S. Veselovsky
openaire   +1 more source

COMPOSITION OF CORONAL MASS EJECTIONS [PDF]

The Astrophysical Journal, 2016
ABSTRACT We analyze the physical origin of plasmas that are ejected from the solar corona. To address this issue, we perform a comprehensive analysis of the elemental composition of interplanetary coronal mass ejections (ICMEs) using recently released elemental composition data for Fe, Mg, Si, S, C, N, Ne, and He as compared to O and H ...
T. H. Zurbuchen, M. Weberg, R. von Steiger, R. A. Mewaldt, S. T. Lepri, S. K. Antiochos   +5 more
openaire   +2 more sources

Coalescence of Magnetic Flux Ropes Within Interplanetary Coronal Mass Ejections: Multi-cases Studies

Frontiers in Physics, 2019
Coronal mass ejections (CMEs) are intense solar explosive eruptions and have significant impact on geomagnetic activities. It is important to understand how CMEs evolve as they propagate in the solar-terrestrial space.
Yan Zhao, Yan Zhao, Hengqiang Feng, Hengqiang Feng, Qiang Liu, Qiang Liu, Guoqing Zhao, Guoqing Zhao   +7 more
doaj   +1 more source

Using an Ellipsoid Model to Track and Predict the Evolution and Propagation of Coronal Mass Ejections

, 2012
We present a method for tracking and predicting the propagation and evolution of coronal mass ejections (CMEs) using the imagers on the STEREO and SOHO satellites.
A. Hupach, A. Thernisien, A. Vourlidas, A.B. Galvin, A.J. Hundhausen, B.E. Wood, B.E. Wood, C. Cattell, F. Auchère, G.E. Brueckner, K. Kersten, L. Jian, M.H. Acuna, N. Lugaz, N. Lugaz, N. Lugaz, N.P. Savani, N.R. Sheeley, N.R. Sheeley, R. Schwenn, R.A. Howard, R.M.E. Illing, R.P. Lepping, R.P. Lin, S. Schreiner, T.A. Howard, T.A. Howard, V. Domingo, Y. Liu   +28 more
core   +1 more source

Sympathetic Coronal Mass Ejections

The Astrophysical Journal, 2003
We address the question whether there exist sympathetic coronal mass ejections (CMEs), which take place almost simultaneously in different locations with a certain physical connection. For this study, the following three investigations are performed. First, we have examined the waiting-time distribution of the CMEs that were observed by the SOHO Large ...
Y.‐J. Moon, G. S. Choe, Haimin Wang, Y. D. Park   +3 more
openaire   +1 more source

Current Helicity in Response to Coronal Mass Ejections

The Astrophysical Journal
Coronal mass ejections (CMEs), powerful solar eruptions with massive plasma ejected into the interplanetary space, are caused by the release of the magnetic free energy stored in coronal electric currents.
Zheng Sun, Ting Li, Xinkai Bian, Yijun Hou, Ioannis Kontogiannis, Ziqi Wu   +5 more
doaj   +1 more source