The overall vector magnitude of the seismic noise decreased by about 90% when the 1 Hz filter was substituted for the 15 Hz filter. Very interestingly, the magnitude distribution is much more gaussian than the output from the 15 Hz device, as well. Will this be good or bad for what the device is intended to do?

I have increased the amplification of the second stage of the amplifier by a factor of 2 to partially compensate for the diminished noise intensity. The overall signal response to small local events seems to have decreased, but there is expected to be no change in the probability data output. Too soon to tell.The software variables are still being tweaked to deal with the new arrangement. It will be interesting to see how the data from the 1 Hz and 15 Hz devices compare while running side by side! Hopefully I will have some data to post in the next week or two.