[Samurai_Jack]

1. Zionist attack on the liberated iranian nuclear infrastructure development.
2. Fuel Tank dropping off a passing aircraft.
3. Construction Blast
4. Geophysical Exploration
5. ???

[Samurai_Jack]

Explanation number 4 GeoPhysical Exploration

(CNN) -- A "geophysical exploration" caused a large blast Wednesday near the southern port city of Dailam in Iran, a local official in the Bushehr province said.

Oil exploration frequently takes place in the area, Iranian officials said.

RIGHT... thats why you need your nuclear facilities?