Analysis of the events that occurred on July 30, 2005, according to ground-based observations in the Ca II 8498 angstrom line and on board spacecraft

作者：Divlekeev M I^*

来源：Geomagnetism and Aeronomy, 2012, 52(8): 1044-1049.

DOI：10.1134/S0016793212080075

The observations of active region (AR) NOAA 10792 in the Ca II 8498 line with an ATB-1 solar telescope at the Sternberg State Astronomical Institute, Moscow State University (SSAI MSU) on July 30, 2005, are illustrated, and the events are analyzed using the data obtained on spacecraft. Three flares and accompanying coronal mass ejections (CMEs) are considered. It has been indicated that the beginning of the first compact CME lagged behind the flare onset by 3 min. Plasma ascended with acceleration that reached 0.4 km/s(2) at the flare maximum. The matter was also apparently accelerated after the flare maximum, since an ejection could only appear at the edge of the occulting C 2 LASCO coronograph disk at 0557 UT when acceleration is about 0.5 km/s(2). The second CME (of the halo type) leaded the beginning of the corresponding flare.

• 出版日期2012-12