The AM Forum

Here is an intersting post that came up on the weather reflector I subscribe to.  Since we are in the infancy of the 2005 hurricane season.

http://www.newscientist.com/article.ns?id=mg18625065.900

"HURRICANES can trigger swarms of weak earthquakes and even set the Earth
vibrating, according to the first study of such effects.

When Hurricane Charley slammed into Florida in August 2004, physicist
Randall Peters of Mercer University in Macon, Georgia, had a seismometer
ready to monitor any vibrations in the Earth's crust. He did so for over 36
hours as Charley travelled briefly over Florida, then slid back out into
the Atlantic.

As the hurricane reached land, the seismometer recorded a series of
"micro-tremors" from the Earth's crust. This happened again as the storm
moved back out to sea. Then, as Charley grazed the continental shelf on its
way out, it caused a sharp seismic spike. "I suspect the storm triggered a
subterranean landslide," says Peters.

More surprisingly, the storm also caused the Earth to vibrate. The planet's
surface in the vicinity of the hurricane started moving up and down at
several frequencies ranging from 0.9 to 3 millihertz. Such low-frequency
vibrations have been detected following large earthquakes, but this is the
first time a storm has been found to be the cause

http://www.arxiv.org/physics/0506162>www.arxiv.org/physics/0506162