Photographer Mika Wist captured amazing photos of mysterious rainbow "urban light pillars" from his balcony when temperatures plunged to -19°C / -2.2°F earlier this week. According to Spaceweather: "Although they look like auroras, they are not...They're light pillars, caused by ice crystals in the air which intercept urban lights and spread them into colorful columns. No solar activity is required for the phenomenon." Continue reading for more pictures, a video and additional information.
Inhabitat says that "it's possible that the subzero spotlights could form in your own city - provided you have excessive light pollution and a frigid climate, of course. In particular, you should keep an eye out for mini-light pillars that form in the glow of streetlights."