afterflow

Etymology
From.

Noun

 * 1) Any flow or issue of fluid which continues after the expected cessation; a later or residual flow; drip.
 * 2) * 2013, L.P. Dake, The Practice of Reservoir Engineering - Page 198
 * Free gas in the riser was therefore subjected to a slight but continuous decrease in compressibility which merely served to prolong the period of afterflow.
 * 1) Any outflow or discharge following an event.