Volume 479, Number 3, March I 2008
|Page(s)||859 - 864|
|Published online||02 January 2008|
Large-scale disturbances preceding a fast halo CME
National Center for Space Weather, China Meteorological Administration, Beijing 100081, PR China e-mail: email@example.com
Accepted: 10 December 2007
Aims.The nature of coronal waves, often termed “EIT waves” is still unclear. Therefore new efforts are needed to investigate large-scale disturbances during solar eruptions. In this paper, we present observations of an event occurring on 19 January 2005, and study the large-scale disturbance during the event in detail.
Methods.Using the high cadence images from SXI onboard GOES-12, the large-scale disturbance is identified. Combined with EIT 195 Å images, TRACE UV 1600 Å images, RHESSI hard X-ray data and MDI/SOHO longitudinal magnetic field maps, the intrinsic process of the large-scale disturbance is discussed.
Results.The large-scale disturbance propagated over a distance about 3.8105 km at a velocity of about 390 km s-1. Along the trajectory of the disturbance, a brightening line was left behind, which was coincident with the dense structure in EIT intensity images. With the morphology and metric radio spectrum data, it was found that the disturbance was not a wave but the low-coronal signatures of the eruption.
Key words: Sun: flares / Sun: coronal mass ejections (CMEs) / Sun: magnetic fields
© ESO, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.