Fig. 10From: Lightning evolution and VLF perturbations associated with category 5 TC Yasa in the South Pacific RegionThe mother Morlet wavelet spectra of NPM (a, b), NLK (c, d) and JJI (e, f) signals during 10 to 25 December 2020. The daytime and nighttime spectra for each signals are shown in the left and right columns, respectivelyBack to article page