Desparate for evidence that wind farms are producing effects at distances of ten kilometres or more, opponents of wind power have wrongly supposed that a report titled “Seismic Noise by Wind Farms: A Case Study from the VIRGO Gravitational Wave Observatory, Italy” (written by Gilberto Saccorotti, David Piccinini, Lena Cauchie and Irene Fiori) dealt with ordinary noise. The VIRGO group picked up vibrations “at distances as large as 11 km from the wind park”.
In fact this report deals with vibrations carried by the ground and detected by instruments called seismometers. Seismometers are exquisitely sensitive instruments; they respond to earthquakes on the other side of the earth. If the strongest vibrations from wind turbines are, at best, detectable at a distance of 11km then they must be quite undetectable by human senses at distances of hundreds of metres or more from the turbines.
If any reader wants to insist that this report does apply to infrasound rather than seismic waves, how would you explain the following bit “direct surface waves and body waves refracted at a deep (800 m) interface between the Plio-Pleistocenic marine, fluvial, and lacustrine sediments and the Miocene carbonate basement”?
PS. Not only opponents have misunderstood this report, but the Senate Committee on the Impact of Wind Farms also did. See section 2.11.