100-ton blast used to calibrate nuke-tracking instruments

The IDF conducted a 100-ton controlled explosion in the Negev Wednesday morning in order to calibrate the Geophysical Institute of Israel's instruments used to track nuclear tests around the world, Channel 10 reported.
The explosion, equivalent to an earthquake measuring 2.5 on the Richter scale, was registered by tracking stations from Eilat in the South to the Hermon Mountain in the North, according to the report. A large mushroom cloud was created by the explosion.