Lightning strikes the Earth's surface about one hundred times per second.
Why it is true
This equals approximately eight million electrical discharges per day across the planet. Most of these lightning strikes occur in tropical regions, where atmospheric convection is more intense and favors the formation of storm clouds.
Source: NASA
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.
Related facts
Lightning is estimated to strike the Earth's surface about eight million times a day, or about one hundred times per second.
Lightning strikes the Earth about one hundred times every second.
A lightning bolt can strike the same tree multiple times.
The Earth is struck by about 100 lightning bolts per second.