Many have upper edges that tend to be sharper than their lower sides, which can be irregular or scalloped in form. Motion of material in QRFs is usually slow and small in scale, leaving the overall prominence shape unchanged, but minor changes can occasionally be seen in as little as 10 minutes. When viewed on the solar disk, QRFs tend to lose some of their fine detail, becoming faint irregular dark patches or large gently curving arcs of dark matter. Prominences are darker on the disk because they absorb light from below and then re-emit it in all directions. Disparition Brusque eruptions usually last less than one or two hours.
Mild surface brightening can also occasionally occur.
Sometimes, a vanished quiescent will even reform a few hours or days later near its previous location. In a few large eruptions, a Dispartition Brusque can produce a Coronal Mass Ejection. Some prominences do rotate slowly, and a few even look and act like tornadoes, especially Disparition Brusque debris. They are present in or near active regions and sometimes wind around or even through large sunspot groups. They can be particularly dark when a spot is emerging, and often show Doppler shifts from material flowing in the fibrils.