posted on Jan, 5 2013 @ 05:28 AM
reply to post by Nyiah
I saw your "never mind", but to answer your specific question about that heliplot in FL, the P wave arrived there at about 9.06 (UTC), which is right
on for the estimated P-wave travel time for the event off Craig, AK
. As for all the
rest that makes the plot do hard to read, it's interference. On the page you linked to, just click on the tag "station issues" and you'll see it says:
Power system may be causing some station noise.
(From the USGS station issues page
the above Helicorder.)
In other words, they're getting intereference from the power supply, which is not such an uncommon problem for helis in more isolated places.
This quake sure shook things up for a long time. Take a look at helicorder station YML in
We can see the first waves from the quake arrived there at about 9:02:45 (UTC -- 02:02:45 MST -- local), and after the first, smaller jolt that built
to a peak after 30 seconds and then died down again, things rumbled a bit for around 4 1/2 minutes and then the main shock hit at around 09:08:15
(UTC). There was about 2 1/2 minutes of very intense shaking (the scale is clipped off and it doesn't show the peaks), then at around 9:11:30 it
begins to died down, but it keeps rumbling as it dies away over the next three-quarters of an hour or so.
Just a note for anyone: the colors of the traces mean nothing. They are just to make it easier to discern the lines when things get messy.
from left to right to follow the time. The time scale on the left is local to Yellowstone, the one shown on the right is UTC. The fine, vertical lines
are to divide things up into one-minute intervals.
edit on 5/1/13 by JustMike because: (no reason given)