High-speed video observations on fork lightning events in Malaysia

Abstract

Malaysia is one of the countries with the highest lightning strikes incidence in the world. Yet, Malaysians are still taking a proper lightning protection indifferent manner. This might be due to lack of knowledge on lightning characteristics. Therefore, this study presents an unusual lightning phenomenon with multiple grounding points that might cause a disastrous event, called fork lightning. Three different patterns of fork lightning mechanism were successfully recorded by using high speed camera with 2800 frame per second. Temporal analysis of the lightning progress had been conducted on the samples based only on the recordings by using Wondershare Filmora video editor. The samples of fork lightning images were acquired among 37 of negative lightning events recorded in this study. The first sample of fork lightning fully established the forked branch 0.35 ms before the return stroke occurred. Whereas, second fork lightning established its forked branch 0.35 ms after the return stroke. Both forked branches for third sample simultaneously fully established with the return stroke event. Obviously, these events had striking the ground in up to ten milliseconds. Thus, there is always a possibility that they might cause serious damage and should not be neglected in designing a lightning protection system.