Fred M: Count me in with maxwell. “I don’t know,” “I doubt it” or “It’s not really significant” would all have been better answers.
The oceans average ~3000 meters deep. Sea level has been rising ~1.8 mm/year for the past century. Since 1993 it’s been measured at 2.9 mm/year, so chalk up 1 mm/year to global warming. Call it a couple of extra centimeters of sea level due to AGW. So we are talking about an increase of less than 1/10,000 sea depth as a cause for the earthquake.
To me this is like arguing for gun control because an extra homicide in the US could trigger World War III.
I think that there are serious arguments for concern about ACC, but this is not one of them. To the extent that ACC scientists and advocates tug their chins and intone that ACC could be the cause for almost every negative event imaginable makes them look credulous and desperate.