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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


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 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 languageEnglish
Title of host publicationSolar Wind Ten
Subtitle of host publicationProceedings of the 10th International Solar Wind Conference
EditorsMarco Velli, Roberto Bruno, Francesco Malara
PublisherAmerican Institute of Physics Inc.
Number of pages4
ISBN (Electronic)0735401489
StatePublished - 2 Sep 2003
Event10th International Solar Wind Conference - Pisa, Italy
Duration: 17 Jun 200221 Jun 2002

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference10th International Solar Wind Conference


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