5.2 Gulf of Mexico probably a slump
- From: Skywise <into@xxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 23 Feb 2006 03:05:18 -0000
I learned today that the 5.2 quake on Feb 9 in the Gulf of
Mexico south of New Orleans, may not have been a quake at
all. It may have been a slump (undersea landslide).
Don in Hollister, on another forum, stated that he had contacted
someone from the USGS looking for a moment tensor solution.
According to the response received, there were no high frequency
components in the energy release.
The quake is no longer listed on the USGS site and it's detail
page has been removed.
Don did further searching on the net and found the following:
"An undersea landslide - technically, a "slump" - about 90
miles off Galveston once sent some 12 to 14 cubic miles of
earth sliding down. The slump at the gulf's East Breaks
formation threw a tsunami estimated at 25 feet high onto
the Texas shoreline, according to researchers who have
studied its geological aftermath on the gulf floor. That
was about 5,000 to 10,000 years ago - many lifetimes for
humans, but a blink in geological time. Peter Trabant, a
marine hazards consultant in Houston who has studied the
landslide, said there's no reason to believe that it won't
happen again. "If it happened again, it would rush over all
the barrier islands, including Galveston Island, and all
the coastal cities - Port Arthur, Galveston, Freeport,
Corpus Christi," Trabant said. "There's definitely a
possibility that this could happen at any time." Still,
the likelihood that it will happen anytime soon seems so
small that Texas has done nothing to plan for it."
As Don put it, "It appears the Gulf Coast may have dodged a
bullet that could have made Katrina look like a drip."
Brian
--
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