"While some volcanic eruptions can be predicted, not all will show show warning signs, says Mitchell." https://www.sciencefocus.com/news/tonga-volcano/

LOL, did you really just pull that "fact" out of thin air without even doing a simple search? it took less than one minute for me to disprove you. "While some volcanic eruptions can be predicted, not all will show show warning signs, says Mitchell." https://www.sciencefocus.com/news/tonga-volcano/