The DEFCON Warning System™

The World’s Only Public Nuclear Threat Advisory System. Independent, real-time analysis of global nuclear tensions. Since 1984.

DEFCON 4 - Blue

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Korea

Fears and questions about North Korea’s growing nuclear arsenal

North Korea’s latest missile launches are a demonstration of the country’s avowed ability to use nuclear force against South Korea and the ...
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Announcements

DEFCON Warning System – Update 3/1/23

This is the DEFCON Warning System. Alert status for 9 P.M. UTC, Wednesday, March 1st, 2023.  Condition code is Green.  DEFCON 5. ...
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Russia

Experts React: Factors Shaping the Russia-Ukraine Conflict in 2023

As Russia and Ukraine head into year two of a war that has defied expectations, a collection of CSIS experts examined driving ...
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Russia

(Radiological) War by Other Means: A Dirty Bomb in Ukraine?

Fear is mightier than the sword, and few things stoke fear like a dirty bomb. So, it should have come as no ...
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Lighthope's Beacon

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Ongoing Geointel and Analysis in the theater of nuclear war.

Opportunity

© 2026 The DEFCON Warning System. Established 1984.

The DEFCON Warning System is a private intelligence organization which has monitored and assessed nuclear threats by national entities since 1984. It is not affiliated with any government agency and does not represent the alert status of any military branch. The public should make their own evaluations and not rely on the DEFCON Warning System for any strategic planning. At all times, citizens are urged to learn what steps to take in the event of a nuclear attack.