revontulia
Revontulia is the Finnish term for the aurora borealis, the natural light display that appears in high-latitude night skies. The name translates to “fox fires,” reflecting a Finnish folklore explanation in which a fox sweeping its tail across the snow creates sparks that light the sky.
In Finnish folklore, revontulia are often described as vivid, shifting curtains and arcs of light that dance
Scientifically, revontulia are caused by charged particles from the Sun interacting with Earth’s magnetosphere and upper
Revontulia are most visible in high-latitude regions, particularly within the Arctic Circle, and are commonly observed
Activity levels vary with the solar cycle and space weather; stronger displays accompany periods of high solar