CME observed continuously from the lower corona to the far corona (CME's onset on November 3, 1997).
Abstract
A program of observations with EIT on board SOHO, is to observe the whole sun surface in 195 Å, i.e. in a Fe XII emission line, every 17 minutes. The very beginning of some CMEs is observed. The authors correlate each Fe XII observation with He II, Hα and coronagraph observations on 97/11/03 and 97/11/04. They found that three prominences were ejected, and that an active region produced 4 ejections. The ejections are dark bubbles propagating above the sun limb, and dimmings propagating on the solar surface in Fe XII. They each produced an associated CME. One CME was not correlated to a Fe XII low corona event. Maybe, this CME had its origin behind the limb. The prominence gave a quite slow CME, i.e. about 50 km s-1 and the active region produced some quite fast CMEs, i.e. about 300 km s-1.
- Publication:
-
JOSO Annu. Rep., 1998
- Pub Date:
- 1999
- Bibcode:
- 1999joso.proc..162D
- Keywords:
-
- Solar Corona: Mass Ejection;
- Solar Corona: Iron Lines