In the past few centuries, the subduction zone off the coast of Sendai has generated earthquakes of up to magnitude 8 or so, but nothing as powerful as a 9, which releases 30 times more energy.
The theories of particle physics predict the strength of dark energy to be about 120 orders of magnitude larger than what is observed, and general relativity cannot explain this enormous discrepancy.
Quantum calculations, however, predict that the amount of vacuum energy in the universe should be more than a hundred orders of magnitude greater than has been observed.