[TimeStar] hurricane and earthquake connection

[Lindsay]

I found this article interesting, especially in light of other recent
studies that say we can expect to have a larger number of hurricanes in
the coming years.
Diz
 


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


Earth trembles as big winds move in


*	02 July 2005 

*	NewScientist.com news service 

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).

>From issue 2506 of New Scientist magazine, 02 July 2005, page 19
 
 
 
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