Officially, the rocket company owned by Elon Musk was launching its Falcon 9 rocket into space to deliver SAOCOM 1A, an Argentine satellite, into orbit. This was SpaceX's first land landing on the West Coast.
In metro Phoenix, witnesses hit up social media with photos and videos of the peculiar streak of light and ghostlike images they saw.
The mission consisted of two identical satellites, SAOCOM 1A and 1B, each of which carries an L-Band SAR polarimetric instrument.
Air Force officials have issued a warning that residents in San Luis Obispo, Santa Barbara and Ventura counties could potentially hear one or more sonic booms due to the launch.
The private spaceflight company has launched multiple satellites and shuttled supplies and science gear to the International Space Station, with its Falcon 9 being the first spacecraft from a private company to reach the station in 2012.
SpaceX inaugurated its West Coast rocket-landing pad in style.
"This is great news for everyone here at SpaceX", Tom Praderio, a SpaceX firmware engineer, said during live launch commentary tonight.
Argentina's satellite will reportedly track natural disasters, crop yields and soil-moisture levels from 385 miles (620km) above the earth. The satellite is one of a planned six-satellite array. It was the 30th successful landing for SpaceX out of 62 total launches and the 12th on land.
Its name is short for Satelite Argentino de Observacion Con Microondas.
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But he got a reprieve as second-half goals from Juan Mata , Anthony Martial and Alexis Sanchez earned a staggering comeback win. Even before their team had gone 2-0 up with goals from Kenedy and Yoshinori Muto that left the home side reeling.
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SpaceX launch and landing in California
The launch, employing the upgraded Block 5 version of the Falcon 9 rocket , remained scheduled for 7:21 p.m. This will mark the first time SpaceX has attempted a ground landing of the Falcon 9 on the West Coast.