Weird Weather.

The Hessdalen Lights

Beginning December 1981, residents of a remote valley in central Norway started seeing bright luminous objects hovering and darting through the sky — sometimes 15 to 20 times per week. Forty years later, Project Hessdalen runs an instrumented observatory there. Spectrometers, magnetometers, and radar all detect the lights. Plasma, piezoelectricity, and scandium-ion mechanisms have been proposed. None fully account for what the instruments record.