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Better forecasting of damaging earthquake swarms may now be more possible after scientists helped to confirm a theory by USGS seismologist James H. Dieterich of how and why swarms occur. The scientists investigated a "super-swarm" of earthquakes offshore Tokyo that struck in the summer of 2000. The research, by Geological Survey of Japan scientist Shinji Toda, USGS scientist Ross Stein, and Geographical Survey Institute of Japan scientist Takeshi Sagiya, will be the cover article in the Sept. 5 edition of Nature. Both Japanese authors were recent post-doctoral scientists at the USGS in Menlo Park, California. In the super-swarm of earthquakes the authors studied, a staccato-like burst of 7,000 magnitude-3 or larger shocks occurred over 2 months about 100 miles south of Tokyo, underneath the Pacific Ocean. There were 45 magnitude-5 shocks and 5 magnitude-6 shocks.
"We believe the total energy released during the Izu islands earthquake swarm is the highest ever recorded," said Stein. "The energy released by this swarm was almost ten times greater than the 1980-81 Long Valley, Calif., swarm; the rate of energy release is 100 times higher."
Earthquake swarms, Stein noted, do not exhibit "typical" earthquake behavior in which a mainshock occurs, followed by a series of aftershocks that become less frequent with time. Instead, in a swarm there is a sustained high rate of earthquakes. Eventually, the seismic action stops or peters out. Swarms are most common in volcanic areas, such as in Hawaii, the Pacific Northwest, Alaska, Yellowstone, and parts of northern and southern California. However, such swarms also may occur on tectonic faults, including California's famed San Andreas. Why swarms occur has always been a mystery
Originally posted by WyrdeOne
Also, I know the whole planet x thing was blown out of proportion and debunked from a hundred angles, but wouldn't this latest, otherwise inexplicable event, serve to coroborate that story somewhat?
Originally posted by Banshee
Okay guys, I've been holding off on doing this for about 12 hours now, but I think it's time to update the death toll.
sg.news.yahoo.com...
45,000 seems to be the next "official" number. It's been dropped here and there throughout the day, and now it's looking more like it's correct.
*sighs*
Originally posted by CazMedia
Japan pledges 30 mill in relief
USA pledges 15 mill in relief
Australia pledges 10 mill in relief
A silent world watches as you give without concern but for the victims....
I thank those that contribute any aid they can on behalf of those now suffering.
SEVERAL hundred Germans are still missing in Thailand after their holiday resorts were battered by tidal waves triggered by an earthquake, tour operator Thomas Cook said today.
A company spokesman said it had been unable to contact about one-third of its nearly 1000 guests in the western resort areas of Phuket and Khao Lak since the quakes struck on Sunday.
Dozens of clients booked at the 319 room Sofitel Magic Lagoon Resort in Khao Lak, which was completely destroyed by the tsunamis, were also missing.