I don't think there is a consensus about what caused the 17-second cycle oscillation of the planet on November 11.
Geologists were quoted in the MSM as remarking that the oscillation looked artificial in nature, because it was such a pristine single frequency. A general sense of "we've never seen THIS before".
The story quickly changed in the MSM to a consensus that it was an underwater volcano, which made that kind of oscillation signature because … well, it must have been that. Unclear if these stores were genuine (it could have been a volcano in a weird context) or a cabal cover story, it's the MSM, shrug.
There's plenty of speculation that it was something that struck a major blow against the cabal, based in the timing (Nov 11 being a date highlighted by Q) and the frequency (note that, if true, it's implied that the specific oscillation period was chosen because 17, therefore the specific period was not required by mission parameters, it could have been a little different and still worked, whatever it was.) Q seemed to endorse this interpretation.
But that leaves wide open WHAT it might have been. No real ideas there. Everything's been floated, it seems, but there's no evidence to really sort out what's true. Something that destroyed a cabal DUMB base? Something that changed the energy vibrations of the planet or reality itself? A "go" signal to far-distant submarines? A warning shot to the cabal that we have some specific technology of which we anons are unaware? Unknown.
The area is near a French island (actually legally part of France itself, from a legal perspective, like Hawaii is for the US.) And Trump was in France for the WW I ceremonies that day. That coincidence caught some attention. The area around that island chain is said to have some trafficking connections. Unknown if any of that is relevant.
So the verdict is … ?????