(Continued from above.)
Now let's take a look at the following day. Sunday Jan 22, 2012, at ~ 1500 UTC (9 am local):
Memphis has a movement range of about 2.5, Bauxite now is down slightly to around 1.0. So, very little change from about 24 hours earlier.
So, on to Monday Jan 23, this time at ~ 14:00 (8 am local):
Now, about 23 hours after the previous trace shown above, Memphis has a range of around 4 and is quite heavy. Bauxite's range is also up a little, to
about 1.5. But also notice that Bauxite's trace is heavier: this means that there was more change in the rate of movement.
A couple hours or so later at ~ 16:20 (10:20 am local), Memphis was busier still, and so was Bauxite:
Remember, although the Bauxite (lower) trace looks
bigger, it actually shows less movement that the top one for Memphis, because its scale is
finer. Now, the average range for Memphis is around 5.5 to 6, while Bauxite's is around 1.8 or so. (Memphis shows a spike around 16:27, with a range
of 26, and this makes the average range of 6 look much smaller. That spike may have been a micro-quake, so small that it was likely unfelt by anyone.)
Key point: the movement in Memphis is a bit more than three times greater than in Bauxite, and also 3 times more than it was (in Memphis) a day or two
This situation in Memphis continued on intermittently into the next day. Here's the shot for Tuesday Jan 24 at ~ 14:30 (8:30 am local):
Memphis: average range 6. Bauxite: still around 1.8 to 2 and quite busy.
Then it began to quieten down. Here's Wednesday Jan 25 at ~ 15:00 (9 am local):
Memphis: around 3.5 to 4 range. Bauxite: about 1.5 to 1.8, but a little less heavy looking.
I like to comment here that if the increase for Memphis was due to cultural activity like road traffic, then I'd expect the traces to be virtually the
same on a Monday and Wednesday morning at what is basically peak hour. However, the variation in the traces would suggest that it's not due to
What's been happening since? Well, things seemed to settle down for a while but not quite back to where it was prior to Jan 22 or so. Right now,
Memphis is showing a range of about 4, Bauxite about 1.5 to 1.8. So, I'll be keeping an eye on it.
Just to finish off, I'd like to add a screenshot that shows the sort of detail you can view with GEE if you wish to. Here's Memphis and Bauxite, today
(Monday) Feb 6 2012 from ~ 17:15 to 17:35 UTC:
You can see the ranges I was talking about.
Now, here's a small section of the above. I've zoomed in on the trace, so it's only showing us about 9 seconds, from ~ 17:25:45 to 17:25:53.
(There's some color loss because this is a jpeg image file. In reality it's much sharper and the lines are clearly blue.)
Notice that the two traces are quite different in character. While the lower one (Bauxite) usually looks like this and presents the impression of a
gentle wave, the trace for Memphis is much more irregular. Again, that's the way it usually is. These two regions produce traces that are, in fact,
quite different animals and this could in part be due to the substrata through which the seismic waves propogate.
Anyway, that's enough for now. Everyone, please keep us posted if you sense or notice anything of interest.
edit on 6/2/12 by JustMike because: A typo... Thgere alwayas hasd tro bee a typpo...