It was just frozen rocket fuel ejected during a SpaceX launch.
https://metro.co.uk/2023/01/31/elon-musk-thought-to-be-responsible-for-whirlpool-in-night-sky-18189747/?utm_source=dlvr.it&utm_medium=blogger
https://metro.co.uk/2023/01/31/elon-musk-thought-to-be-responsible-for-whirlpool-in-night-sky-18189747/?utm_source=dlvr.it&utm_medium=blogger