Hi,
  Spectacular!  Even the 7.7 exceeded (slightly) the 16 bit A/D capacity
here in New Jersey.  Motion was above background until about 5 hrs.
after the 7.7 arrived.
  A "Geotech Blastcorder Mod. 5050" is on ebay #499098344, ends 11/21.
It looks like it may be a short period seismograph. Can someone on this
net tells us what this thing does?
Bob Barns
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