Yesterday they were talking about a hum the earth generates continuously that is just outside our senses range to pick up.
I am wondering if animals can hear it or feel it and can recognize when the hum changes that something big is about to happen.
Something sure happens with them though, there are too many cases documented of their behavior changing before a quake to casually disregard.
Why does the Earth “hum?”
http://www.space.com/scienceastronomy/planetearth/space_symphony_000323.html
The apparent answer, revealed in the March 24 issue of the journal Science, is as surprising as the hum itself.
Kiwamu Nishida of the University of Tokyo’s Earthquake Research Institute has, along with colleagues, analyzed 10 years of seismic data and tied the seismic waves to similar oscillations in the atmosphere.
Inaudible sound waves in the lower atmosphere push and pull on the ground, the researchers say, creating coupled “sound” waves, or seismic waves, inside Earth. The initial source, as yet not determined, could be changes in atmospheric pressure. The researchers also did not rule out possible oceanic sources, such as pounding waves, as the cause of Earth’s hum.
I lived in Southern California for 18 years and I can attest that our dog sensed earthquakes before we did. They sense the ULF (Ultra Low Frequencies) generated by the earth about minutes before an eartquake starts.