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Cosmic Ray Levels Jump 19% Beyond Anything Seen in the Last 50 Years Posted by Guy Pirro on 9/29/2009 7:31 PM Energetic iron nuclei counted by the Cosmic Ray Isotope Spectrometer on NASA's Advanced Composition Explorer (ACE) spacecraft reveal that cosmic ray levels have jumped 19% beyond anything we've seen in the past 50 years. The cause of the surge is the current solar minimum, a deep lull in solar activity that began around 2007 and continues today. Researchers have long known that cosmic rays go up when solar activity goes down. The sun's magnetic field is our first line of defense against these highly-charged, energetic cosmic particles and right now solar activity is as weak as it has been in modern times. | Read full story |

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