Update on the Wisconsin Fireball (and meteorites)

A brilliant and well observed fireball was observed flying over the American Midwest Wednesday evening. The map below shows that sightings were made from Kansas in the south to Minnesota in the north and from Indiana in the east to South Dakota in the north. The yellow stars denote a sighting while the red stars denote reports of sonic booms (a tell tale sign that meteorites may have survived to hit the ground).

Map of fireball and sonic boom reports for the April 15 Wisconsin fireball. All reports were submitted to the Amercian Meteor Society and this blog. Yellow stars denote sightings and red stars denote sonic boom reports. Credit: Carl Hergenrother

Zooming in on the area where most of the sonic booms were heard brings us to southwestern Wisconsin. We now know that meteorites were found in this area. Not only did the sonic booms  and the large number of videos point meteorite hunters to this area but as many as 3 NWS Doppler radars picked up the meteorites as they were falling through the atmosphere. The blue square pinpoints were the radars place the most likely area of meteorite falls.

Zoomed in map of fireball and sonic boom reports for the April 15 Wisconsin fireball. All reports were submitted to the Amercian Meteor Society and this blog. Yellow stars denote sightings, red stars denote sonic boom reports and the blue square denotes most likely point of meteorite landings. Credit: Carl Hergenrother

All of these observations have allowed researchers to quickly find meteorites from this fireball. Meteorite related stories can be found here and here.

Finally a YouTube video of the fall…