It's a shallow quake so unfortunately, you're probably right.
Be interesting to know if the under sea volcanic activity has changed.
When KV was going to the Marine Sci lectures there were some really cool footage taken of these vents in the active ring of fire by the man in craft undersea explorers.
I wish they could have left behind some sort of monitoring system to gauge any correlation between quakes and venting of the undersea molten lava.
The one thing that was amazing is this lava had lil crabs running around on it.
Most have some heat resistant non melting shells/claws.