Fig. 6From: Lightning-associated VLF perturbations observed at low latitude: Occurrence and scattering characteristics(a)–(b): Early/slow events observed simultaneously on transmissions from NWC and NPM which occurred in the daytime at 00:34:50.2 UT (12:34:50.2 LT). Solid traces (blue color) and dotted traces (red color) represent amplitude and the phase, respectively. The solid line with arrows in panel (a) shows time of occurrence of VLF perturbation event.Back to article page