Solar Wind Disturbances and Their Sources in the EUV Solar Corona

A. N. Zhukov; I. S. Veselovsky; F. Clette; J. F. Hochedez; A. V. Dmitriev; E. P. Romashets; V. Bothmer; P. Cargill

doi:10.1063/1.1618692

Solar Wind Disturbances and Their Sources in the EUV Solar Corona

A. N. Zhukov, I. S. Veselovsky, F. Clette, J. F. Hochedez, A. V. Dmitriev, E. P. Romashets, V. Bothmer, P. Cargill

Department of Space Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Scopus citations

Abstract

We investigate possible links between the activity manifestations in the solar corona and conditions in the solar wind. For the reduction of this immense task we have selected 206 events in the solar wind in 1997 - 2000 corresponding to geomagnetic events with A_p > 20 (compiled into a database at http://alpha.sinp.msu.ru/apev). Up to now, 24 events during the epoch of low solar activity (January 1997 - January 1998) are investigated. The solar wind conditions monitored by ACE and WIND spacecraft were traced back to the solar corona observed by SOHO/EIT. The search for coronal signatures which are probably associated with the disturbed solar wind conditions was performed. The coronal sources of these 24 events are identified, namely: eruptions in active regions, filament eruptions and coronal holes. It is shown that halo and partial halo CMEs observed within the SOHO/LASCO sensitivity limits are not necessary indicators of Earth-directed eruptions, and coronal EUV dimmings can be used as a complementary indicator. We also found that a structure now conventionally called a "sigmoid" cannot be represented as a single S-shaped loop (flux tube), but exhibits an assembly of many smaller structures. It could be formed and destroyed via eruptions.

Original language	English
Title of host publication	Solar Wind Ten
Subtitle of host publication	Proceedings of the 10th International Solar Wind Conference
Editors	Marco Velli, Roberto Bruno, Francesco Malara
Publisher	American Institute of Physics Inc.
Pages	711-714
Number of pages	4
ISBN (Electronic)	0735401489
DOIs	https://doi.org/10.1063/1.1618692
State	Published - 2 Sep 2003
Event	10th International Solar Wind Conference - Pisa, Italy Duration: 17 Jun 2002 → 21 Jun 2002

Publication series

Name	AIP Conference Proceedings
Volume	679
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	10th International Solar Wind Conference
Country/Territory	Italy
City	Pisa
Period	17/06/02 → 21/06/02

Access to Document

10.1063/1.1618692

Cite this

Zhukov, A. N., Veselovsky, I. S., Clette, F., Hochedez, J. F., Dmitriev, A. V., Romashets, E. P., Bothmer, V., & Cargill, P. (2003). Solar Wind Disturbances and Their Sources in the EUV Solar Corona. In M. Velli, R. Bruno, & F. Malara (Eds.), Solar Wind Ten: Proceedings of the 10th International Solar Wind Conference (pp. 711-714). (AIP Conference Proceedings; Vol. 679). American Institute of Physics Inc.. https://doi.org/10.1063/1.1618692

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title = "Solar Wind Disturbances and Their Sources in the EUV Solar Corona",

abstract = "We investigate possible links between the activity manifestations in the solar corona and conditions in the solar wind. For the reduction of this immense task we have selected 206 events in the solar wind in 1997 - 2000 corresponding to geomagnetic events with Ap > 20 (compiled into a database at http://alpha.sinp.msu.ru/apev). Up to now, 24 events during the epoch of low solar activity (January 1997 - January 1998) are investigated. The solar wind conditions monitored by ACE and WIND spacecraft were traced back to the solar corona observed by SOHO/EIT. The search for coronal signatures which are probably associated with the disturbed solar wind conditions was performed. The coronal sources of these 24 events are identified, namely: eruptions in active regions, filament eruptions and coronal holes. It is shown that halo and partial halo CMEs observed within the SOHO/LASCO sensitivity limits are not necessary indicators of Earth-directed eruptions, and coronal EUV dimmings can be used as a complementary indicator. We also found that a structure now conventionally called a {"}sigmoid{"} cannot be represented as a single S-shaped loop (flux tube), but exhibits an assembly of many smaller structures. It could be formed and destroyed via eruptions.",

author = "Zhukov, {A. N.} and Veselovsky, {I. S.} and F. Clette and Hochedez, {J. F.} and Dmitriev, {A. V.} and Romashets, {E. P.} and V. Bothmer and P. Cargill",

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Zhukov, AN, Veselovsky, IS, Clette, F, Hochedez, JF, Dmitriev, AV, Romashets, EP, Bothmer, V & Cargill, P 2003, Solar Wind Disturbances and Their Sources in the EUV Solar Corona. in M Velli, R Bruno & F Malara (eds), Solar Wind Ten: Proceedings of the 10th International Solar Wind Conference. AIP Conference Proceedings, vol. 679, American Institute of Physics Inc., pp. 711-714, 10th International Solar Wind Conference, Pisa, Italy, 17/06/02. https://doi.org/10.1063/1.1618692

Solar Wind Disturbances and Their Sources in the EUV Solar Corona. / Zhukov, A. N.; Veselovsky, I. S.; Clette, F. et al.
Solar Wind Ten: Proceedings of the 10th International Solar Wind Conference. ed. / Marco Velli; Roberto Bruno; Francesco Malara. American Institute of Physics Inc., 2003. p. 711-714 (AIP Conference Proceedings; Vol. 679).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - We investigate possible links between the activity manifestations in the solar corona and conditions in the solar wind. For the reduction of this immense task we have selected 206 events in the solar wind in 1997 - 2000 corresponding to geomagnetic events with Ap > 20 (compiled into a database at http://alpha.sinp.msu.ru/apev). Up to now, 24 events during the epoch of low solar activity (January 1997 - January 1998) are investigated. The solar wind conditions monitored by ACE and WIND spacecraft were traced back to the solar corona observed by SOHO/EIT. The search for coronal signatures which are probably associated with the disturbed solar wind conditions was performed. The coronal sources of these 24 events are identified, namely: eruptions in active regions, filament eruptions and coronal holes. It is shown that halo and partial halo CMEs observed within the SOHO/LASCO sensitivity limits are not necessary indicators of Earth-directed eruptions, and coronal EUV dimmings can be used as a complementary indicator. We also found that a structure now conventionally called a "sigmoid" cannot be represented as a single S-shaped loop (flux tube), but exhibits an assembly of many smaller structures. It could be formed and destroyed via eruptions.

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Zhukov AN, Veselovsky IS, Clette F, Hochedez JF, Dmitriev AV, Romashets EP et al. Solar Wind Disturbances and Their Sources in the EUV Solar Corona. In Velli M, Bruno R, Malara F, editors, Solar Wind Ten: Proceedings of the 10th International Solar Wind Conference. American Institute of Physics Inc. 2003. p. 711-714. (AIP Conference Proceedings). doi: 10.1063/1.1618692

Solar Wind Disturbances and Their Sources in the EUV Solar Corona

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