Some scientific facts about natural phenomena
Answers
1. Volcanic lightning
It's pretty hard to study, but researchers have a few ideas about what causes it. One of the most common is that during an eruption, ash picks up so much friction that the build-up of static electricity causes lightning.
2.2. Fire rainbows — sorry,I mean 'circumhorizon arcs'
These beautiful sky paintings have nothing to do with fire or rain, as weather-loving people are very quick to point out.
They're actually caused by the sun, very high in the sky, shining through a particular type of ice cloud formation. That means that how rare they are varies with how far north or south you are.
3. Halos
Like fire rainbows, halos require just the right formation of ice crystals in clouds high above the surface of the Earth to bend light from the sun into a perfect ring.
The same phenomenon can also happen with moonlight, although moon halos are usually white and sun halos can be rainbow-colored, like this one.
4.Fire whirls, aka fire tornadoes
It's pretty clear how this phenomenon got its nickname: It looks like a tornado, but it's made of fire. "It's just like a spinning column of flames," forecaster Michael Watkins told the Los Angeles Times.
They form when wind patterns twist an active fire into a column.
About once a year, the US sees one large fire whirl — as tall as 1000 feet. Fire whirls can spread fires not only directly, but also by scattering burning debris.
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