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Coronal mass ejections: Solar cycle aspects
Advances in Space Research, 2007Abstract Research in the area of coronal mass ejections (CMEs) is now mature, since their discovery coincided with the first coronagraph that was flown in space in 1971. However, the continuity of space coronagraphs and similar instruments has allowed the detection and measurement of CMEs over almost three consecutive solar cycles.
Hebe Cremades, O.C. St. Cyr
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The Hydromagnetic Nature of Solar Coronal Mass Ejections
Annual Review of Astronomy and Astrophysics, 2005▪ Abstract Solar coronal mass ejections (CMEs) are a major form of activity on the Sun. A CME takes 1015-16g of plasma from the low corona into the solar wind, to disturb the near-Earth space if the CME direction is favorable. We summarize current observations and ideas of CME physics to provide a hydromagnetic view of the CMEs as the products of ...
Mei Zhang, Boon Chye Low
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The solar sources of coronal mass ejections
2008Despite nearly two decades of observations and study of coronal mass ejections (CMEs), the question of the physical and phenomenological origins of CMEs remains unanswered. This question has been addressed in several different types of studies, each having important limitations.
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The Sun’s magnetized plasma atmosphere is the source of various forms of activity, the most dramatic of which are coronal mass ejections (CMEs). These ejections are a bulk expulsion of plasma and magnetic field that travel out into the heliosphere, causing space weather effects on any planetary environments that they interact with.
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The source regions of solar coronal mass ejections
Solar Physics, 1990Knowledge of the origin of the solar coronal mass ejection (CME) may be crucial to our understanding of several active solar phenomena, such as flares, as well as to the structure and stability of the corona and the prediction of interplanetary disturbances.
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Study of Multiple Coronal Mass Ejections at Solar Minimum Conditions
Solar Physics, 2012The aim of this work is to provide a physical explanation for the genesis of multiple coronal mass ejections (CMEs) in an asymmetric coronal field configuration. We analyze STEREO observations of a multiple eruption and compare the results from the data analysis with predictions provided by magnetohydrodynamic (MHD) simulations.
Bemporad A. +4 more
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Coronal mass ejections: Relationship with solar flares and coronal holes
2002Abstract The Coronal Mass Ejections (CMEs) observed by the LASCO coronagraph and associated solar activity phenomena whose locations were identified by EIT and solar Hα flare observations during year 2000 indicate that about 40%, 26% and 30% of CMEs were observed when there were coronal holes (CHs) within 1–10, 11–20 and 21–40 degrees, respectively
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The Solar Cycle Dependence of Coronal Mass Ejections
1986The Solwind white light coronagraph on P78-1 has been making routine observations of the solar corona since 28 March 1979. Data from the 1984/1985 time period has just been analyzed. During this interval, a period of low solar activity, coronal mass ejections (CMEs) occurred at the rate of 0.2– 0.4/day, in contrast to the rate of 1.8/day during the ...
R. A. Howard +3 more
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The Automatic Detection of Coronal Mass Ejections Using the Solar Mass Ejection Imager
2009Abstract : The most severe space weather is known to arise from large eruptions of plasma and magnetic field from the Sun. These eruptions, called Coronal Mass Ejections (CMEs), are an important mechanism in the evolution of the solar cycle. Because of their known association with geomagnetic storms and their resulting costly damage, there has been a ...
Maxwell M. Hampson +2 more
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