NASA’s John Stennis Space Center advises people in the vicinity of Bay St. Louis, Mississippi, to expect elevated decibel levels Saturday during the final hot fire test in the Green Run test series on the new Space Launch System core stage.

A NASA spokesman said the acoustic level is not expected to reach high enough to have any damaging effect.

Whether people hear it and how loud it is will depend on their location relative to the test site and the prevailing weather conditions, he said.

The anticipated test will involve firing four RS-25 engines to produce a combined 1.6 million pounds of thrust, he said. The acoustic level produced is expected to be about 10-20 decibels higher than during a normal single engine test at the site.

NASA is targeting a two-hour test window that opens at 4 p.m. for the hot fire test of the SLS core stage, the spokesman said. Live coverage will begin at 4:20 p.m. on the agency’s website.

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

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