Hello I noticed today a giant spike in hash rate all the way tipping off at 548PH/s

Any thoughts on who with what kind of miners could have caused this massive spike?
https://ibb.co/2VPhRx0 1st image ------2nd image
https://ibb.co/C3ZLhPBZCould there be some massive group out there with a large amount of miners getting ready to try and take over a large amount of the hashrate?
-Loshi
BTC