(A ) SURGE

Surges are mass-ejections with or without a flare.They are visible in H-alpha and other chromospheric lines.Surges follow long, straight or curved columnar paths upward and generally return along the same trajectory (possibly outlining magnetic flux tubes) with speeds less than the solar escape-velocity. The mass-ejection often occurs near spot-penumbrae, or polarity reversal associated with satellite sunspots and the activity ceases when the satellite spot disappears.

(B) SPRAY

Sprays are fast mass ejections, generally associated with flares and their velocities frequently exceed the solar escape-velocity.(i.e. V >618 km/sec). The ejection is extremely violent and contrasting with surges, the ejected matter appears, in narrow-band observations, not contained by the magnetic field but to fly out in fragments. More recent broad-band observations, however, indicate that most of the material is in fact entrained on expanding loops.

(C) LOOP PROMINENCES

Observations of limb flares often show extensive 'loop' prominences in which large amounts of material appear in H-alpha at coronal heights and stream down along curved paths, interpreted as magnetic field lines. The material is somehow injected into the corona above the active region during the flare, which remains invisible in H-alpha before getting cooled down when it shows up as 'knots' streaming down towards the chromosphere.