My own 2 cents on EMPs:
On or about Feb 13 2013, two news worthy events occurred
1) The Carnival Cruise Lines ship "Triumph" became disabled at sea. It had lost all power on board both electrical and mechanical. It's location was the southernmost part of the Gulf of Mexico with 3500 passengers on board. It took 4 days to tow the vessel back to port and most passengers became very sick from no sanitation, no running water, no refrigeration and no ability to prepare food. It was a state of the art 900' ship that was totally inoperative.
2) On or about the same date Kim John Un of North Korea announced to the world that NK had successfully detonated a nuclear device in the upper atmosphere. Our mainstream media reported that none of the US monitoring devices had detected such a detonation. They also reported that the disabled ship lost it's power as a result of an engine room fire(no back-up?) At the time, North Korea had only been successful in launching missels from submarines which could have been in international waters as close as 6 miles from the lower Gulf of Mexico.
Coincidence, I think not! Google is your friend, search Triumph, North Korea and 2/13/13