Fig. 4From: Lightning-associated VLF perturbations observed at low latitude: Occurrence and scattering characteristics(a)–(b): Daytime early/fast events observed simultaneously on NWC, NPM, NLK, and VTX signals on 5 November 2006 at 21:46 UT. All transmitter signals show the early/fast perturbation preceded by a RORD.Back to article page