The Two Characteristics of Ground Flashes to be Referred for the Human Safety

Abstract

For the safety of human beings against lightning, it is essential to keep away from direct strikes. To establish the proper safety guide, the time intervals between subsequent flashes and the distances between subsequent struck points are the two important factors. The authors statistically analyzed the data obtained by the lightning location system, covering whole Kanto District for two years and clarified the statistical feature of the above two factors. When a person hears thunder, he should immediately refuse into a safe space, such as the interior of buildings. When a person encounters an active thunderstorm, he should keep his posture as low as possible till the storm activity diminishes.