Twitter’s wrong on the math.. a 3.0 earthquake is equivalent to 1,000 pounds of tnt. A 2.5 is equivalent to 187 pounds.
Since it was an above ground explosion on recovered land, much of the shockwave below ground would have been absorbed by the soft material and not transferred over a distance for earthquake measurement.
what are they reporting as the strength? A good geologist can make the calculations as we have plenty of data on thing like this.