English

DTIC AD1040918: CATACLYSMIC POLARITY SHIFT IS U.S. NATIONAL SECURITY PREPARED FOR THE NEXT GEOMAGNETIC POLE REVERSAL

The Earth's core is undergoing a dramatic change with geomagnetic field strength dropping by 40 percent over the last 400 years, and satellite observations showing the field weakening ten times faster than previously calculated. These changes are a precursor to a common geological phenomenon known as a geomagnetic polarity reversal, where the north and south magnetic poles of the Earth reverse. Geomagnetic polarity reversals significantly decrease the strength of the magnetic field, thereby considerably increasing the interaction of the solar wind with the Earth's atmosphere and biosphere. The purpose of this research is to answer if the United States is prepared for the impacts to national security resulting from the next geomagnetic polarity reversal. The report begins with an overview of pole reversals, then evaluates the effects of reversals on United States national security by utilizing six evaluation criteria ranging from infrastructure areas such as the electrical power grid to national response capabilities. The research evaluates the impacts of increases in solar and cosmic radiation and the threat of adverse space weather during a polarity transition on United States nat

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