A house shaking test, according to what people were saying online. Viewers from all over the region commented that they could feel and or hear the test as all four engines provided over a million pounds of thrust during testing at Stennis Space Center yesterday.

Due to COVID-19 protocols, there was no public test viewing opportunity on site.

The largest rocket element NASA has ever built, the core stage of NASA’s Space Launch System (SLS) rocket, fired its four RS-25 engines for 8 minutes and 19 seconds Thursday at NASA’s Stennis Space Center. The successful test, known as a hot fire, is a critical milestone ahead of the agency’s Artemis I mission, which will send an uncrewed Orion spacecraft on a test flight around the Moon and back to Earth, paving the way for future Artemis missions with astronauts. Engineers designed the eight-part Green Run test campaign to gradually bring the SLS core stage to life for the first time, culminating with the hot fire. The team will use data from the tests to validate the core stage design for flight.