Nasa astronaut on ISS, caught this sprite over Mexico and the US this morning. Sprites are TLEs or Transient Luminous Events, that happen above the clouds and are triggered by intense electrical activity in the thunderstorms below. Source: NASA Astronaut Nichole Ayers

December 4th is Saint #Barbara day. In European medieval folklore, Barbara is the patron saint of stone cutters and people associated with rocks like miners, and today in extension to the geosciences in general ⚒️