Thanks again Buddy - had no idea Conoco had all that to do with this invention.
When they did all the seismic around here we never felt anything - just heard the humming noise coming from the trucks and as you said there were 3 of them hooked together. We are on 16 acres in between land to our north and east of 300 acres and then around a 100 acres to our west were they are testing. When the seismic crew was out here they told us they were starting at the corner of our land and they have done all of the 300 acres to date. The seismic crew told us that usually on smaller acreages they don't necessarily test them for drilling purposes but test the larger acreage and can tell what we have also and would be pooled in - which is why I was curious how far those waves go in telling them what is under our ground when they are across the fence line (about 80 yards from our house) so to speak where they have done the seismic testing.