COMMENT OF THE DAY: THE FOLKS THUMPING YOUR PROPERTY “As someone who used to work on seismic crews for years before moving into designing these subsurface programs, I can tell you all about these. Vibe machines shake the ground using varying frequencies, some you feel, many you can’t. Those waves penetrate the earth with some of the energy reflecting back to the surface when it hits a density change while some of the energy refracts deeper down. Geophones are placed in an array at set spacing surrounding the source (vibe) and ‘listen’ for these reflected waves to return and record the strength and timing of the returning wave. So, as previously mentioned, this is an oil/gas survey not ‘minerals,’ although the subsurface rights are called ‘mineral rights.’ Mineral rights supercede those of surface rights. You absolutely can shoot seismic on someones land without their permission. It sets up bad rapport and ultimately it’s not the seismic company that makes that decision, it’s the oil/gas company that is hiring them to do so. It usually only has to happen on large tracts. Small ones, you can navigate around the refusal without compromising data integrity. Large tracts you have to get a TRO (temporary restraining order) and usually the local sheriff is brought in to ensure security. It was rare, but it did happen. Aside from bad blood between the landowner and the field crew, we would generally find some of our equipment damaged upon removal.” [jeff, commenting on The Seismic Vibrators Shaking Up Some Southeast Houston Neighborhoods]