Dive deeper · 3 min read
Ball lightning floats through windows and vanishes with a pop
Scientists still aren't sure what causes it, but witnesses describe a glowing ball drifting through the air, sometimes through solid glass, before bursting. It's like a tiny, temporary sun that politely leaves the room.
Ball lightning is one of the strangest atmospheric phenomena ever reported: a luminous sphere, usually the size of a grapefruit, that drifts through the air for a few seconds before exploding or fading. Witnesses consistently describe it as glowing, often red, orange, or blue-white, and sometimes translucent. It has been reported for centuries, yet it remains scientifically unresolved. [1][2]
What witnesses actually report
- A glowing ball, typically 10–30 cm across, floating slowly at or below eye level. [1]
- A lifetime of a few seconds, ending in a bang, a pop, or a quiet disappearance. [1][2]
- Occasional reports of passing through window glass or walls without leaving a hole. [1]
- A strong association with thunderstorms, though it has also been seen in clear weather. [2]
The phenomenon is rare enough that most meteorologists never see one, and reports were long dismissed as hallucinations or tall tales. That changed partly because of a famous 1963 letter to the journal Science, in which physicist Philip J. Wyatt argued that the sheer number and consistency of eyewitness accounts made ball lightning worth serious study. [1][2]
Why it's so hard to study
Ball lightning is unpredictable, brief, and appears near violent electrical activity, which makes it nearly impossible to instrument in the field. Researchers have tried to recreate it in the lab using electrical discharges, and some experiments have produced glowing plasma balls, but no one has confirmed that these match the natural phenomenon. [2][3]
One widely discussed hypothesis is that ball lightning is a cloud of ionized gas, or plasma, stabilized in some way. Another suggests it could be a chemical or nanoparticle effect, such as vaporized soil rising from a lightning strike and burning in the air. A 2014 study proposed that certain soil types, when struck by lightning, could release silicon nanoparticles that oxidize and glow. [3][4]
A long history of sightings
- Ancient times
Reports of glowing spheres during storms appear in medieval European chronicles and other historical records.
- 1963
Philip J. Wyatt publishes a letter in Science urging scientists to take eyewitness reports seriously.
- 2000s
Laboratory experiments produce plasma-like balls using electrical discharges, but none are confirmed as the real thing.
- 2014
Researchers propose that vaporized silicon nanoparticles from soil could explain the glow.
Despite decades of effort, there is still no accepted theory that explains every report. Some scientists suspect ball lightning may not be a single phenomenon at all, but a family of effects with different causes that happen to look similar to observers. [2][3]
“Ball lightning is a phenomenon that has been reported for centuries, but has never been reliably observed under controlled conditions.”
— National Weather Service, ball lightning overview
Sources
- Ball lightning Wikipedia
- Ball Lightning National Weather Service
- Ball lightning: a scientific mystery Encyclopaedia Britannica
- A model of ball lightning based on silicon nanoparticles Nature Communications
