When Lightning Strikes, Does It Electrocute The Entire Ocean?

Lightning is one of the most dangerous weapons in Mother Nature's arsenal. Lightning packs millions of volts of electrical energy and can reach temperature that is hotter than the sun. When lightning strikes the ground, it can cause fires, damage property and even kill people. What happens when lightning strikes the ocean? Does it kill every fish? How far does the electricity travel? How deep does it go?


Surprisingly, lightning does not cause widespread damage in the ocean.

Electricity from the lightning travels along the path of least resistance. In an ocean, the water surface offers the least resistance and electrons spread horizontally on the surface than penetrating it vertically. Therefore, fish and underwater plants that live in shallow waters are more likely to be electrocuted than those that live in deeper waters.

Unlike a lightning strike on the ground, which propels electrons in streams along a certain direction, lightning strike on the water causes them to be radiated equally in all directions. This causes the electrons to lose energy quicker than on the ground. The total affected area in water may be more, but the distance at which the charge remains dangerous is significantly smaller.

Even though there are no accurate estimates available, it is estimated that the “kill zone” for fish is few hundred feet (in a radius) from the point where the lighting strikes.  

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