afterwave

Etymology
From.

Noun

 * 1) A wave (in literal and figurative senses) that follows something.
 * 2) * 1801, (translator), The Natural History of Volcanoes by the Abbé Ordinaire, London: T. Cadell, Jun. and W. Davies, Chapter22, p.158,
 * From the fierce burning stream, the afterwaves keep those over which they flow, in a state of fusion: