posted on Dec, 24 2019 @ 04:11 PM
Whenever and wherever- you get a situation where you have increasing quake magnitudes over a short period of time in the same area, it is cause for
concern. Because at that point no one knows if they are going to just keep getting bigger. And that's exactly what we had here- and therefore I made
this thread to alert people of the situation. Fortunately nothing greater has happened from that point, as of yet.
It takes time for more information and analysis to come out. Right about the time I figured out that these were intraplate quakes, I saw the post over
at PNSN which corroborated that with moment tensors and I reported it in this thread right away.
If you study scientific papers, you would understand that scientists believe that over time, bouts of these kind of quakes create additional pressure
on the locked zone in Cascadia, because of stress redistribution. The stress gets released from quakes in one area, but this causes adjacent areas to
take on at least a portion of that stress. The locked zone is a huge area on the Cascadia fault which is basically stuck together and cannot move as
the two tectonic plates try to slide past each other. This creates the most dangerous situation, as it continues to build pressure until one day that
pressure releases in the form of an M9+ megathrust quake.
It is possible that one M6 quake in the wrong spot could possibly send the Cascadia fault over the edge, as it is most definitely in the time window
for a recurring mega thrust earthquake. Here we had not just one, but TWO M6 quakes, and worse, in an increasing magnitude scenario. So yeah, I think
that was worth a thread.
Right now the stress released on the Explorer plate with this sequence of large quakes is redistributing, and part of it is getting sent to the
Cascadia fault. Who's to say that in two days, like what happened in Japan in 2011, this redistributed stress could trigger the Cascadia fault to
Because it very well could. Let's just hope it doesn't.