The blast drove the machinery backwards for an instant, which had an understandably immeasurable effect on the tide-line of the artificial island it was built to keep afloat, since said island sank and was subsequently subducted with undersea crust movements some ten million (or so) years earlier. The thrust of the giant pistons did, however, send a tiny pulse of microwaves back to the well-preserved powerplant.
For a few minutes the lights inside burned brightly again, claiming for Hob what would have been third place for the "longest-ranged accidental death-lamp funeral service," had anyone from Frub-Xhin's Record-Setting Galactic Trivia actually been watching.