[TigerLikesRooster]

Update:

The magnitude of the blast was 2.6 in Richter Scale.

[michigander]

Richter Magnitude How many kilograms of TNT would have this much energy?

0	                 0.6	


1.0	               20	  


2.0	               600	                *  Smallest quake people can normally feel


3.0	               20 000   	        *  Most people near epicenter feel the quake
       
                                              *  Nearly 100, 000 occur every year of size 2.5 - 3.0

4.0	               60 000	           *  A small fission atomic bomb

                                              *  Quakes above 4.5 can cause local damage
  
5.0	               20 000 000	    *  A standard fission bomb, similar to the first bomb tested in New 
                                              Mexico, U.S.

6.0	               60 000 000  	  *  A hydrogen bomb;  can cause great damage locally

                                             *  About 100 shallow quakes of size 6.0 every year

7.0	               20 billion	      *  Major earthquake;  about 14 every year

                                             *  Enough energy to heat New York City for 1 year

                                             *  Large enough to be detected all over globe

8.0	               60 billion	      *  Largest known:  8.9 in Japan and in Chile/Ecuador

                                             *  San Francisco destroyed by 8.25 in 1906

9.0	               20 trillion	    *  Roughly the worldÕs energy usage in a year

[Southack]

"The magnitude of the blast was 2.6 in Richter Scale."

For comparison, GlobalSecurity.org reports that the smallest nuclear blast, the five tests by Pakistan in response to India's nuclear test, measured up to 5.0 on the Richter scale. http://www.globalsecurity.org/wmd/world/pakistan/nuke-chron.htm

CNN says those blasts measured 4.6: http://www.cnn.com/WORLD/asiapcf/9805/30/pakistan.nuclear/

The two conventional explosions on the doomed Russian submarine Kursk measured 3.5 and 1.5 on the Richter scale:
http://www.cnn.com/2000/WORLD/europe/08/18/russian.submarine.05/

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