[Launch Alert] Liftoff

[Launch Alert]

The following is an update from SpaceX:

"On Monday, September 11 at 11:57 p.m. PT, Falcon 9 launched 21 Starlink satellites to low-Earth orbit from from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California."

A sonic boom followed by a low rumble was heard in southeast Ventura County at 12:06 a.m. PDT (T+9 minutes). This was probably produced by the launch.