Results 51 to 60 of about 49,445 (284)

PHYSICAL CONDITIONS OF CORONAL PLASMA AT THE TRANSIT OF A SHOCK DRIVEN BY A CORONAL MASS EJECTION [PDF]

open access: yes, 2015
We report here on the determination of plasma physical parameters across a shock driven by a coronal mass ejection using white light (WL) coronagraphic images and radio dynamic spectra (RDS).
R. Susino, A. Bemporad, S. Mancuso
semanticscholar   +1 more source

WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE? [PDF]

open access: yes, 2015
Mass is one of the most fundamental parameters characterizing the dynamics of a coronal mass ejection (CME). It has been found that CME apparent mass measured from the brightness enhancement in coronagraphs increases during its evolution in the corona ...
Li Feng   +6 more
semanticscholar   +1 more source

Source Regions of Coronal Mass Ejections [PDF]

open access: yesProceedings of the International Astronomical Union, 2004
The majority of flare activity arises in active regions which contain sunspots, while CME activity can also originate from decaying active regions and even so-called quiet solar regions which contain a filament. Two classes of CME, namely flare-related CME events and CMEs associated with filament eruption are well reflected in the evolution of active ...
Schmieder, Brigitte   +1 more
openaire   +3 more sources

A SOLAR CORONAL JET EVENT TRIGGERS A CORONAL MASS EJECTION [PDF]

open access: yes, 2015
In this paper, we present multi-point, multi-wavelength observations and analysis of a solar coronal jet and coronal mass ejection (CME) event. Employing the GCS model, we obtained the real (three-dimensional) heliocentric distance and direction of the ...
Jiajia Liu   +5 more
semanticscholar   +1 more source

Periodicities in solar coronal mass ejections [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2003
Mid-term quasi-periodicities in solar coronal mass ejections (CMEs) during the most recent solar maximum cycle 23 are reported here for the first time using the four-year data (February 5, 1999 to February 10, 2003) of the Large Angle Spectrometric Coronagraph (LASCO) onboard the Solar and Heliospheric Observatory (SOHO).
Yuming Wang   +10 more
openaire   +4 more sources

THE ROLE OF ACTIVE REGION CORONAL MAGNETIC FIELD IN DETERMINING CORONAL MASS EJECTION PROPAGATION DIRECTION [PDF]

open access: yes, 2015
We study the role of the coronal magnetic field configuration of an active region (AR) in determining the propagation direction of a coronal mass ejection (CME).
Rui Wang   +5 more
semanticscholar   +1 more source

Observations of Coronal Mass Ejections with the Coronal Multichannel Polarimeter [PDF]

open access: yesSolar Physics, 2013
The Coronal Multichannel Polarimeter (CoMP) measures not only the polarization of coronal emission, but also the full radiance profiles of coronal emission lines. For the first time, CoMP observations provide high-cadence image sequences of the coronal line intensity, Doppler shift and line width simultaneously in a large field of view. By studying the
G. de Toma   +5 more
openaire   +5 more sources

Interplanetary Propagation Behavior of the Fast Coronal Mass Ejection on 23 July 2012 [PDF]

open access: yes, 2014
The fast coronal mass ejection (CME) on 23 July 2012 caused attention because of its extremely short transit time from the Sun to 1 AU, which was shorter than 21 h.
M. Temmer, N. Nitta
semanticscholar   +1 more source

The relationship of coronal mass ejections to streamers [PDF]

open access: yesJournal of Geophysical Research: Space Physics, 1999
We have examined images from the Large‐Angle and Spectrometric Coronagraph (LASCO) to study the relationship of coronal mass ejections (CMEs) to coronal streamers. We wish to test the suggestion [Low, 1996] that CMEs arise from flux ropes embedded in a streamer erupting and disrupting the streamer. The data span a period of 2 years near Sunspot minimum
Prasad Subramanian   +4 more
openaire   +4 more sources

Unusual shrinkage and reshaping of Earth’s magnetosphere under a strong northward interplanetary magnetic field

open access: yesCommunications Earth & Environment, 2023
Open magnetic flux in the polar cap almost completely disappeared and the Earth’s magnetotail was compressed into a calabash shape during the 9th April 2015 coronal mass ejection, according to magnetohydrodynamic simulations and observations from DMSP ...
Xiang-Yu Wang   +13 more
doaj   +1 more source

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