The distance a lightning strike can travel in open water depends on various factors, including the strength of the lightning bolt, the conductivity of the water, and the surrounding conditions. Generally, lightning seeks the path of least resistance to the ground.
When a lightning bolt strikes open water, it typically spreads out along the water's surface, known as "surface flashover." This phenomenon occurs because water is a relatively good conductor of electricity. The lightning current will spread out in a circular pattern from the point of impact, traveling through the water.
The extent of the spread and travel distance of a lightning strike on open water can vary. In some cases, the lightning current may dissipate quickly, traveling only a short distance from the strike point. However, under certain conditions, particularly if the strike is powerful, the current can propagate over a larger area.
In rare instances, a lightning bolt can travel through the water for several meters or more before dissipating. There have been reports of lightning strikes causing injuries or fatalities to individuals swimming or standing near the water's edge. Therefore, it is important to exercise caution during thunderstorms and seek shelter indoors to avoid the risk of being struck by lightning.