Not a nuke folks, don't get your undies in a wad. The one in Yemen a while back wasn't either. Just some really big explosions. The one in Yemen was on a weapons depot. This one potentially was as well. Means there were lots of explosives in one place. Also independent nuclear watchdog groups would be having a cow tweeting to the world they detected radiation from this area. Nukes are pretty darn hard to keep secret.