SpaceX rocket carved giant hole in the ionosphere
 

Rockets can leave a mark on the atmosphere well after they've left, and SpaceX may have learned that first-hand. Researchers have determined that a Falcon 9 launch in August 2017 (the Formosat-5 mission above) not only created circular shockwaves, b...

https://www.engadget.com/2018/03/25/...in-ionosphere/