Q noise
From Glossary of Meteorology
Q noise
Quasi-continuous sequences of VHF (very high frequency) radiation emanating from lightning that is associated with high-speed K-change activity along pre-ionized lightning channels.
The process was named by David Proctor (1974).
Proctor, D. 1974. VHF radio pictures of lightning. CSIR Special Report, No. TEL 120. Pretoria, South Africa..