"A curious and credible Tweet from the Director of the Nuclear Information Project for the Federation of American Scientists, Hans Kristensen, on August 1, 2018 at 5:14 PM Washington D.C. time claimed that a, “Meteor explodes with 2.1 kilotons force 43 km above missile early warning radar at Thule Air Base.”
The Tweet apparently originated from Twitter user “Rocket Ron”, a “Space Explorer at the Jet Propulsion Laboratory”. The original Tweet read, “A fireball was detected over Greenland on July 25, 2018 by US Government sensors at an altitude of 43.3 km. The energy from the explosion is estimated to be 2.1 kilotons.” Rocket Ron’s Tweet hit in the afternoon on Jul. 31."
"NASA’s Jet Propulsion Laboratory did provide a Tweet with a screenshot of data showing record of an object of unspecified size traveling at (!) 24.4 Kilometers per second (about 54,000 MPH or Mach 74) at 76.9 degrees’ north latitude, 69.0 degrees’ west longitude on July 25, 2018 at 11:55 PM. That latitude and longitude does check out as almost directly over Thule, Greenland."
https://theaviationist.com/?p=58201