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 Joined: Sat Nov 14, 2009 7:08 am Posts: 3245 
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 Quake on China, Russia, NK BorderFOXNews.com
Earthquake Strikes Russia, China, North Korea Border Wednesday, February 17, 2010 AP ADVERTISEMENT BEIJING — A magnitude 6.7 earthquake rocked the region where China, Russia and North Korea meet Thursday, the U.S. Geological Survey said. There were no immediate reports of damage or injuries. Though area residents said they did not feel the quake, office towers in Beijing — about 770 miles away from the epicenter — swayed slightly for about a minute. The quake occurred 335 miles below the earth's surface. With earthquakes centered deep underground, sometimes those close to the epicenter don't feel it while people further away notice some shaking, said the duty officer at the Seismological Bureau of Yanbian Korean Autonomous Prefecture in northeast China's Jilin province. He refused to give his name as is common among Chinese officials. The Korea Earthquake Research Center said there was no damage in North or South Korea and that quakes occur in that region about once a year. The USGS said the epicenter was on the Russian coast along the Sea of Japan, 61 miles (98 kilometers) west-southwest of Vladivostok, about 70 miles east of China's Yanji city in Jilin province. SEARCH Click here for FOX News RSS Feeds A Copyright 2010 FOX News Network, LLC. All rights reserved. All market data delayed 20 minutes. http://www.foxnews.com/printer_friendly ... 08,00.html _________________ I know not, with what weapons WWIII will be fought, but WWIV will be fought with sticks, and stones. (Einstein) |
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| Thu Feb 18, 2010 8:42 am |
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 Joined: Thu Sep 24, 2009 12:29 pm Posts: 754 Location: Corner Of Walk and Don't Walk, Half Way Between Heaven and Hell
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Re: Quake on China, Russia, NK Border They upgraded this quake to M6.9.
Last night I was amazed ad how many of the seismograph recorders seemed to have pick this up. If this is the same shockwave then it seems it took nearly 9-10 minutes to the US. I know we calculated once that the big quake that caused Mexico City was actually in the ground around a minute before the massive S-Waves hit the city. That tells me there is hope for early warning devices on the bigger quakes. Maybe not right on the epicenter but out a few hundred miles. Projects such as The Quake Catcher Netwrok (http://qcn.stanford.edu/press/videos.php) may really be worth while. For instance, this recent quake probably took 1-2 minutes to reach Beijing from the epicenter. With a one minute warning I can leisurely walk down the stairs and outside here in the office building where I work.
Look at 6:24 (1824) PM Mountain last night. The same event is seen on nearly every recorder around the western US and Canada. Another thing to note that may indicate this came from a great distance was the approximate 2 minute lead-time separation of P-wave and S-wave. (see the recoding below) http://www.seis.utah.edu/helicorder/  Seismic Wave Speed discussed here. http://en.wikipedia.org/wiki/Seismic_wave _________________ I just know that something good is going to happen. I don't know when, But just saying it could even make it happen. http://www.kuernodechivo.com/ |
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| Thu Feb 18, 2010 11:09 am |
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