Sure seems like an extra ordinary number of weird occurances lately, the booming sounds and now this at 0' of depth. If I were a local USGS guy, I'd seen a team out to have a look around.
Heads up on a Super New Moon if you didn't know about it. The last one was in March of last year and I don't have to tell you what happened in March of last year. :)
'Supermoon' Alert: Biggest Full Moon of 2012 Occurs This Week
At perigee, the moon will exert about 42 percent more tidal force than it will during its next apogee two weeks later,
The North and South ends of the Juan de Fuca plate have been busy last couple days. One each end, one hour apart this morning.