A check of SEISMIC ACTIVITY for IRAN on DEC 21 shows nothing for that AREA, at the time the say it happened.
Surely an explosion that large would have registered on SEISMIC LOGS.
Here.... look for yourself.
http://earthquake-report.com/2012/01/19/iran-real-time-earthquakes-list/
Bump to your post no. 29, UCANSEE2.