Open AccessElectric Field Waveforms of Very Close Negative Cloud to Ground Flashes
Author(s) -
Shamsul Ammar Shamsul Baharin,
Mohd Riduan Ahmad
Publication year - 2020
Publication title -
journal of engineering and scientific research
Language(s) - English
Resource type - Journals
ISSN - 2685-1695
DOI - 10.23960/jesr.v2i2.68
Subject(s) - electric field , lightning (connector) , cloud computing , waveform , meteorology , field (mathematics) , physics , environmental science , remote sensing , electrical engineering , geography , computer science , engineering , mathematics , voltage , power (physics) , quantum mechanics , operating system , pure mathematics
Negative cloud-to-ground brings down negative charge from cloud to ground. In this paper, observations of the characteristics of fast and slow electric field within reversal distance (less than 7-8 km from lightning sensor) are reported. A total of four negative cloud to ground lashes detected very close to our measurement site in Universiti Teknikal Malaysia Melaka on 12th November 2019 were selected for analysis. The captured waveforms are compared with the location data provided by Tenaga Nasional Berhad Research (TNBR) for validation purposes. It can be observed that electric field changes of stepped leader and return stroke are always positive whether beyond or within reversal distance. Meanwhile, for cloud activities, the electric field change is always negative within reversal distance.