posted on Dec, 28 2012 @ 12:51 PM
It's been a while since I posted in this thread, but I thought I would bring it back to the front page for some input, so here goes.
I've noticed that the GPS array situated across the Vancouver Island, B.C./northern Puget Sound, WA region has remained unsettled since the Mag 7.8
Haida Gwaii earthquake 03:04:11 UTC October 28th.
The map below shows the array. map source
Now check out the data.
will take you to the Latitude page--showing movement in the North-South
direction. (sorry, the page is too large to provide a screen shot)
Almost every station shows a 15 millimeter (1.5 cm) movement to the south over a two-day period. Then a 10 mm rebound to the north the following day.
(The best I can tell, this movement occurred over the 22nd, 23rd, and 24th of December.)
Does anyone else think this movement is large? Looking at the graphs prior to the end of October, the GPS positions seem fairly constant. Not
stationary, but relatively calm. But to my eye, November and December look like a rollercoaster across the entire region.
Use this link
to check out the vertical locations. Just about every station in the
array experienced a 20 millimeter (2 cm) drop over the same time period.
No slow-slip (ETS) has been observed in the area over the past week or so, so it is not that.
Umm, I don't know what to make of it, but I wanted to share. Maybe over a longer time frame, these movements will look tame.