SpaceX Plans Vandenberg Landing That Could Trigger Sonic Booms

A planned overnight rocket launch from Vandenberg Space Force Base in Santa Barbara County could produce loud sonic booms across parts of California's central and southern coast. SpaceX scheduled the Falcon 9 liftoff for 12:39 a.m. Saturday, October 10, 2026, with its first-stage booster expected to return to the launch site approximately eight minutes later.

According to a SpaceX advisory issued Friday, the booster is expected to land at Landing Zone 4 at Vandenberg around 12:47 a.m. Residents in Santa Barbara, San Luis Obispo and Ventura counties could hear one or more sonic booms, depending on weather and other atmospheric conditions.

The rocket will carry satellites for the Space Development Agency's fourth Tranche 1 data transport mission. The mission supports the development of a military satellite communications network in low-Earth orbit.

Unlike missions in which Falcon 9 boosters land on drone ships in the Pacific Ocean, this flight is scheduled to return its first stage to solid ground at the launch base. That planned recovery could make the launch more noticeable to communities along the California coast.

Sonic booms occur when an object travels faster than the speed of sound, generating shock waves that can produce a sudden, thunder-like sound when they reach the ground.

The launch had already experienced three scrubs since October 5, according to the Ventura Star. The planned Saturday flight follows those earlier attempts, although SpaceX has scheduled another opportunity if the launch cannot proceed as planned.

SpaceX has a backup launch window scheduled for Sunday, October 11, at 12:32 a.m. The company is also targeting another Falcon 9 launch from Vandenberg on Monday, October 12, between 4 p.m. and 8 p.m., carrying 27 Starlink satellites into low-Earth orbit.

The overnight launch is not expected to offer the colorful, glowing "space jellyfish" effect sometimes seen during twilight rocket launches. Visibility will depend on cloud cover and other atmospheric conditions.

SpaceX is expected to begin a live webcast approximately 10 minutes before the scheduled liftoff, according to the launch information provided by the company.