A SpaceX Falcon 9 rocket is scheduled to be launched, and then landed, at Vandenberg Air Force Base on Wednesday morning, and base officials are warning that the rocket's return could cause one or more sonic booms that may be audible throughout Santa Barbara, Ventura and San Luis Obispo counties. The launch is scheduled for a window beginning at 7:17 a.m. Wednesday, June 12, from VAFB’s Space Launch Complex-4. The Falcon 9 rocket is set to carry the RADARSAT Constellation, which will include three Earth observation satellites, on behalf of the Canadian Space Agency.

Launch countdown starts - 12:28

Booster landing starts - 19:00

Booster landing at VAFB - 20:30