Tag Archive for 'Discharge'

Coronae glow on the tips of spruce needles, induced by charged metal plates in a laboratory. Image credit: William Brune.

Scientists Observe Electrical Discharges on Trees under Thunderstorms

Feb 26, 2026 by Sergio Prostak

Most people know about lightning and the havoc it wreaks on forests. They do not know about the weak electrical glow, called a corona, that is thought...

Lightning starts with a positive fast discharge, followed by an even faster and more extensive negative discharge observed in 3D; signal polarizations slant from the discharge propagation direction and rotate between the two opposite fast discharges; these features can only be due to a cosmic-ray shower that preconditioned the discharge path and guided the discharge current direction. Image credit: ELG21.

Cosmic-Ray Showers Play Pivotal Role in Triggering Lightning Flashes

Mar 11, 2025 by News Staff

How lightning is started in thunderstorms is poorly known. With a newly-developed 3D mapping and polarization system, physicists at Los Alamos National...