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Big Earthquakes Spark Jolts Worldwide

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posted on May, 26 2008 @ 08:05 AM
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Big Earthquakes Spark Jolts Worldwide


www.sciencedaily.com



"ScienceDaily (May 26, 2008) — Until 1992, when California's magnitude-7.3 Landers earthquake set off small jolts as far away as Yellowstone National Park, scientists did not believe large earthquakes sparked smaller tremors at distant locations. Now, a definitive study shows large earthquakes routinely trigger smaller jolts worldwide, including on the opposite side of the planet and in areas not prone to quakes.Previously it was thought seismically active regions or geothermal areas were most vulnerable to large earthquake triggers," says Kris Pankow, a seismologist at the University of Utah Seismograph Stations and a co-author of the new study.

But Pankow and colleagues analyzed 15 major earthquakes stronger than magnitude-7.0 since 1992, and found that at least 12 of them triggered small quakes hundreds and even thousands of miles away, according to the findings published online May 25, 2008 in the journal Nature Geoscience.

"We conclude that dynamic triggering is a ubiquitous phenomenon," they wrote.
(visit the link for the full news article)



[edit on 26-5-2008 by grover]




posted on May, 26 2008 @ 08:05 AM
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This is interesting... I wonder what the time delay is... days... weeks... months or years.

www.sciencedaily.com
(visit the link for the full news article)



posted on May, 26 2008 @ 08:14 AM
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reply to post by grover
 


With so many quakes that happen every day, I wonder how they can say which one is directly related to another?

For example, all of these happened on the 19th
2008/05/19 19:02:56 31.70S 178.60W 142 5.0 KERMADEC ISLANDS REGION

2008/05/19 17:52:33 32.23N 105.03E 10 5.2 SICHUAN-GANSU BORDER REG, CHINA

2008/05/19 15:19:20 5.71S 147.21E 121 5.2 EASTERN NEW GUINEA REG., P.N.G.

2008/05/19 14:49:17 1.74N 99.19E 10 5.2 NORTHERN SUMATRA, INDONESIA

2008/05/19 14:26:45 1.63N 99.14E 10 6.0 NORTHERN SUMATRA, INDONESIA

2008/05/19 12:49:57 2.78N 95.46E 35 4.8 SIMEULUE, INDONESIA

2008/05/19 10:08:35 42.52N 131.87E 504 5.7 E. RUSSIA-N.E. CHINA BORDER REG.

2008/05/19 06:06:54 32.43N 105.30E 10 5.1 SICHUAN-GANSU BORDER REG, CHINA

2008/05/19 05:40:39 7.10S 130.61E 35 5.3 KEP. TANIMBAR REGION, INDONESIA

2008/05/19 04:21:01 6.49S 106.84W 10 4.8 CENTRAL EAST PACIFIC RISE

2008/05/19 04:08:59 32.58N 105.07E 10 4.9 SICHUAN-GANSU BORDER REG, CHINA

2008/05/19 03:16:13 47.74S 31.89E 10 5.9 SOUTH OF AFRICA

2008/05/19 00:54:42 19.43N 64.04W 67 3.5 VIRGIN ISLANDS REGION



posted on May, 26 2008 @ 08:18 AM
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What I am interested in are the long term echos... for example could the quakes in China have originally been kicked off by the one off of Sumatra in 06.



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