Dr. Heidorn also looks at Viking vanes, rooster-vanes on church steeples, vanes in both the Old and New Worlds, vanes in folk art, and much more. As always, his is a fascinating essay. A great chart makes the patterns clearer. A sudden gust of wind intruded itself upon my musings. I enjoyed reading it and hope you will too.
Infrasonic shocks produce characteristic pressure effects on structures and organisms alike.
The sensation flattens the body. It is as if one were struck with a solid invisible wall from which there is no escape. There are physiological effects as well. Anxiety, fear, extreme emotional distress, and mental incapacitation are all part of the unpleasant phenomenon. Notable among human exposures to quake-correlated infrasound is the precursory nausea which many report . . . .