70 pounds of TNT.
A magnitude 1.0 earthquake is roughly equivalent to the energy released from an explosion of about 70 pounds of TNT (a mid-sized construction site blast), a magnitude 2.0 earthquake is similar to an explosion of 1 metric ton of TNT, and a magnitude 4.0 earthquake is approximately equivalent to the energy.
In Physics, magnitude is defined as the maximum extent of size and the direction of an object. Magnitude is used as a common factor in vector and scalar quantities. By definition, we know that scalar quantities are those quantities that have magnitude only.
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