Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives

The cluster formed by active regions (ARs) NOAA 11121 and 11123, approximately located on the solar central meridian on 11 November 2010, is of great scientific interest. This complex was the site of violent flux emergence and the source of a series of Earth-directed events on the same day. The onse...

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Autores principales: Cremades, H., Mandrini, C.H., Schmieder, B., Crescitelli, A.M.
Formato: JOUR
Materias:
Coronal mass ejections, initiation and propagation
Coronal mass ejections, low coronal signatures
Prominences, dynamics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00380938_v290_n6_p1671_Cremades
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00380938_v290_n6_p1671_Cremades2023-10-03T14:48:53Z Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives Cremades, H. Mandrini, C.H. Schmieder, B. Crescitelli, A.M. Coronal mass ejections, initiation and propagation Coronal mass ejections, low coronal signatures Prominences, dynamics The cluster formed by active regions (ARs) NOAA 11121 and 11123, approximately located on the solar central meridian on 11 November 2010, is of great scientific interest. This complex was the site of violent flux emergence and the source of a series of Earth-directed events on the same day. The onset of the events was nearly simultaneously observed by the Atmospheric Imaging Assembly (AIA) telescope onboard the Solar Dynamics Observatory (SDO) and the Extreme-Ultraviolet Imagers (EUVI) on the Sun-Earth Connection Coronal and Heliospheric Investigation (SECCHI) suite of telescopes onboard the Solar-Terrestrial Relations Observatory (STEREO) twin spacecraft. The progression of these events in the low corona was tracked by the Large Angle Spectroscopic Coronagraphs (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) and the SECCHI/COR coronagraphs on STEREO. SDO and SOHO imagers provided data from the Earth’s perspective, whilst the STEREO twin instruments procured images from the orthogonal directions. This spatial configuration of spacecraft allowed optimum simultaneous observations of the AR cluster and the coronal mass ejections that originated in it. Quadrature coronal observations provided by STEREO revealed many more ejective events than were detected from Earth. Furthermore, joint observations by SDO/AIA and STEREO/SECCHI EUVI of the source region indicate that all events classified by GOES as X-ray flares had an ejective coronal counterpart in quadrature observations. These results directly affect current space weather forecasting because alarms might be missed when there is a lack of solar observations in a view direction perpendicular to the Sun-Earth line. © 2015, Springer Science+Business Media Dordrecht. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00380938_v290_n6_p1671_Cremades
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Coronal mass ejections, initiation and propagation
Coronal mass ejections, low coronal signatures
Prominences, dynamics
spellingShingle Coronal mass ejections, initiation and propagation
Coronal mass ejections, low coronal signatures
Prominences, dynamics
Cremades, H.
Mandrini, C.H.
Schmieder, B.
Crescitelli, A.M.
Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
topic_facet Coronal mass ejections, initiation and propagation
Coronal mass ejections, low coronal signatures
Prominences, dynamics
description The cluster formed by active regions (ARs) NOAA 11121 and 11123, approximately located on the solar central meridian on 11 November 2010, is of great scientific interest. This complex was the site of violent flux emergence and the source of a series of Earth-directed events on the same day. The onset of the events was nearly simultaneously observed by the Atmospheric Imaging Assembly (AIA) telescope onboard the Solar Dynamics Observatory (SDO) and the Extreme-Ultraviolet Imagers (EUVI) on the Sun-Earth Connection Coronal and Heliospheric Investigation (SECCHI) suite of telescopes onboard the Solar-Terrestrial Relations Observatory (STEREO) twin spacecraft. The progression of these events in the low corona was tracked by the Large Angle Spectroscopic Coronagraphs (LASCO) onboard the Solar and Heliospheric Observatory (SOHO) and the SECCHI/COR coronagraphs on STEREO. SDO and SOHO imagers provided data from the Earth’s perspective, whilst the STEREO twin instruments procured images from the orthogonal directions. This spatial configuration of spacecraft allowed optimum simultaneous observations of the AR cluster and the coronal mass ejections that originated in it. Quadrature coronal observations provided by STEREO revealed many more ejective events than were detected from Earth. Furthermore, joint observations by SDO/AIA and STEREO/SECCHI EUVI of the source region indicate that all events classified by GOES as X-ray flares had an ejective coronal counterpart in quadrature observations. These results directly affect current space weather forecasting because alarms might be missed when there is a lack of solar observations in a view direction perpendicular to the Sun-Earth line. © 2015, Springer Science+Business Media Dordrecht.
format JOUR
author Cremades, H.
Mandrini, C.H.
Schmieder, B.
Crescitelli, A.M.
author_facet Cremades, H.
Mandrini, C.H.
Schmieder, B.
Crescitelli, A.M.
author_sort Cremades, H.
title Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
title_short Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
title_full Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
title_fullStr Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
title_full_unstemmed Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
title_sort coronal mass ejections from the same active region cluster: two different perspectives
url http://hdl.handle.net/20.500.12110/paper_00380938_v290_n6_p1671_Cremades
work_keys_str_mv AT cremadesh coronalmassejectionsfromthesameactiveregionclustertwodifferentperspectives
AT mandrinich coronalmassejectionsfromthesameactiveregionclustertwodifferentperspectives
AT schmiederb coronalmassejectionsfromthesameactiveregionclustertwodifferentperspectives
AT crescitelliam coronalmassejectionsfromthesameactiveregionclustertwodifferentperspectives
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