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Lightning is a natural phenomenon formed by electrostatic discharges through the atmosphere between two electrically charged regions, either both in the atmosphere or one in the atmosphere and one on the ground, temporarily neutralizing these in a near-instantaneous release of an average of between 200 megajoules and 7 gigajoules of energy, depending on the type.
Lightning interferes with amplitude modulation (AM) radio signals much more than frequency modulation (FM) signals, providing an easy way to gauge local lightning strike intensity. [34] To do so, one should tune a standard AM medium wave receiver to a frequency with no transmitting stations, and listen for crackles among the static. Stronger or ...
Lightning is detected remotely using sensors that detect cloud-to-ground lightning strokes with 95 percent accuracy in detection and within 250 metres (820 ft) of their point of origin. [ 105 ] Summer storm in 19th-century Polish countryside – picture by Jozef Chelmonski , 1896, 107 cm (42.1 in)x163 cm (64.1 in), National Museum in Cracow
“Lightning can travel through plumbing,” the CDC said. “It is best to avoid all water during a lightning storm. Do not shower, bathe, wash dishes, or wash your hands.”
If historical trends hold, deaths by lightning will peak this month. Typically, 32 people die every year in the U.S., most of them while recreating.
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A lightning detector is a device that detects lightning produced by thunderstorms. There are three primary types of detectors: ground-based systems using multiple antennas, mobile systems using a direction and a sense antenna in the same location (often aboard an aircraft), and space-based systems.
Global map of lightning frequency--strikes/km 2 /yr. The high lightning areas are on land located in the tropics. Areas with almost no lightning are the Arctic and Antarctic, closely followed by the oceans which have only 0.1 to 1 strikes/km 2 /yr. The map on the right shows that lightning is not distributed evenly around the planet. [5]