Article by: Hobart M. King, Ph.D., RPG
World Lightning Map: The map above shows the average yearly counts of lightning flashes per square kilometer based on data collected by NASA’s Lightning Imaging Sensor on the Tropical Rainfall Measuring Mission satellite between 1995 and 2002. Places where less than one flash occurred (on average) each year are gray or light purple. The places with the largest number of lightning strikes are deep red, grading to black. Enlarge.
What is Lightning?
Lightning is a sudden high-voltage discharge of electricity that occurs within a cloud, between clouds, or between a cloud and the ground. Globally, there are about 40 to 50 flashes of lightning every second, or nearly 1.4 billion flashes per year. These electrical discharges are powerful and deadly.
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