[BenLurkin]

This website says 5.3 Richter equates to 90 kilotons of exploding TNT.

http://www.english.ucla.edu/all-faculty/335-kelly-kiloton-index-of-earthquake-moment-magnitudes

[rdl6989]

I can't say much for the credibility of this source, but this is from Twitter: ‏@DWSAviation 16m16 minutes ago #BREAKING Mil Aircraft continue to depart and arrive in large numbers @ Osan. Flights are are securing UHF and VHF radios with encryption.

[laplata]

Thanks for the info.

[TMSuchman]

And a device that size detonated at 200-300 miles agl [above ground level] over Kansas would turn the entire North American Continent back to the early 1800’s in under a min. Then 90% of our population would be dead within a year. [as per a fema report to congress (unclassified)]

This is a manmade EMP