The average yearly counts of lightning flashes per square kilometer

The average yearly counts of lightning flashes per sq. km. from 1995 - 2013. Areas with the fewest number of flashes each year are gray and purple, areas with the largest number of lightning flashes — as many as 150 per year per square kilometer — are bright pink.

The map is based on data collected from 1998 to 2013 by the Lightning Imaging Sensor  on NASA’s Tropical Rainfall Measuring Mission satellite, and from 1995 to 2000 by the Optical Transient Detector on the OrbView-1/Microlab satellite.

Via NASA