He not only predicted the approximate date, but also the magnitude and epicenter.
His method (cloud formations) is not widely accepted by the scientific community. Perhaps because his geological and meteorological skills are self-taught. He claims a prediction success rate >60%, and that it would be higher if he had better access to satellite imagery.
I first heard of him in The Cloudspotter’s Guide, then I found these links:
https://www.varsity.co.uk/science/19876
https://www.frontiersin.org/articles/10.3389/feart.2022.812540/full
You didn’t read any of the links, did you? BTW, this is not Mastadon.