What is the relationship between earthquakes power and nuclear explosions?

What is the relationship between earthquakes power and nuclear explosions?

How to compared power of earthquake with nuclear explosion?

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Did you check Wikipedia? –  Qmechanic Oct 12 '12 at 11:33
@Qmechanic: quote that as an answer...I guess it is eligible to be an answer.. –  Vineet Menon Oct 12 '12 at 11:36
I think it's correct, and gentlemanly, when Qmechanic doesn't "quote" answers written by someone else - like Wikipedia users - as his own for which he should collect big points. The problem with Vineet's picture is not only that the right verb isn't "quote", but "plagiarize"; this copying would have another drawback, namely the lack of personal responsibility for the answers. This forum shouldn't be reduced to a place where people mindlessly copy and paste. –  Luboš Motl Oct 12 '12 at 12:26
A weak earthquake of magnitude 3 has energy of 2.0 Gigajoules, 0.48 tonnes of TNT, or of a sizable chemical bomb. Since earthquake energies increase by a factor of 32 per magnitude, a modest magnitude 5 earthquake has an energy of 2.0 Terajoules, 480 tonnes of TNT, or a 0.48 megaton nuclear device. The 1960 Chili 9.5 magnitude earthquake, the strongest on record, generated TNT equivalent of 11 Exajoules, 2.7*10$^{12}$tonnes of TNT, or that of a 2.7 billion tonne nuclear bomb!!!