A review on the genesis of coronal mass ejections

This paper provides a short review of some of the basic concepts related to the origin of coronal mass ejections (CMEs). The various ideas which have been put forward to explain the initiation of CMEs are categorized in terms of whether they are force-free or non-force-free and ideal or nonideal. A few representative models of each category are examined to illustrate the p rinciples involved. At the present time there is no model which is sufficie ntly developed to aid forecasters in their efforts to predict CMEs, but giv en the current pace of research, this situation could improve dramatically in the near future.