I work at Vexcel Corporation in
Colorado. I'm building wireless sensor network nodes (sometimes called
bricks) that are used to acquire data in remote field locations. At the
moment we are in "Generation 2" with "Gen 3" on the drawing board.
Below is a picture of 16 of these units and here is the User's Manual.
Now watch the mass of ice at center bottom carefully in this sequence
You'll notice it appears to be growing. This is not an illusion or a
backwards time sequence.
That cliff face I estimate at 120--140 meters high.
Collapsing under its own weight the submarine iceberg falls back into
And just a fraction of a second later, this last photo.
Typical seismicity from these events at 200 samples per second
(separate bricks recording the same event).
This blow-up shows the precision with which the seismic signals track
one another. The two bricks were only a few meters apart so the seismic
signals are quite similar.