SIERRA FIREBALL DECODED: An explosion over California that rattled homes across at least two states on Sunday, April 22nd, has been analyzed by NASA’s Meteoroid Environment Office: It was a natural meteoroid the size of a mini-van. Analysts say the space rock exploded in the atmosphere with an energy equal to nearly 4 kilotons of TNT and might have sprayed the Sierra Nevada mountains with meteorites. Visit http://spaceweather.com for more information.
AURORA WATCH: At the time this alert is being written on April 23rd, a minor geomagnetic storm is underway. The storm is likely due to Earth’s passage through the wake of a CME that swept past our planet earlier in the day. Sign up for aurora alerts at http://spaceweathertext.com (text) or http://spaceweatherphone.com (voice).