Rotation-Averaged Rates of Coronal Mass Ejections and Dynamics of Polar Crown Filaments
- 1 January 1994
- journal article
- Published by Cambridge University Press (CUP) in International Astronomical Union Colloquium
- Vol. 144, 83-89
- https://doi.org/10.1017/s0252921100025057
Abstract
We obtained Carrington-rotation-averaged daily rates of coronal mass ejections (CMEs), corrected for duty cycle, for the period 1979-1989. The 27-day averages of CME rate and sunspot number are correlated over this 11-yr period, although significant discrepancies can occur for any given rotation. The baseline CME rate exhibited quasi-discontinuities in 1982 (decrease) and 1988 (increase) when the “tilt angle” of the heliospheric current sheet passed through values of ∼ 50°. We suggest that these quasi-discontinuities are related to the dynamics of the belts of polar crown filaments that reside at ∼ 50° north and south of the equator during solar minimum and move poleward during the rise phase of the solar cycle.Keywords
This publication has 5 references indexed in Scilit:
- Sizes and locations of coronal mass ejections: SMM observations from 1980 and 1984‐1989Journal of Geophysical Research, 1993
- LARGE-SCALE STRUCTURE OF THE HELIOSPHERIC MAGNETIC FIELD: 1976-1991Published by Elsevier ,1992
- Activity associated with the solar origin of coronal mass ejectionsSolar Physics, 1987
- Coronal mass ejections: 1979–1981Journal of Geophysical Research, 1985
- Frequency of coronal transients and solar activitySolar Physics, 1976