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W. R. Webber and F. B. McDonald Recent Voyager 1 data indicate that on 25 August 2012 at a distance of 121.7 AU from the Sun, sudden and unprecedented intensity changes were observed in anomalous and galactic cosmic rays Geophysical Research Letters 40

Version of Record online: 12 MAY 2013 | DOI: 10.1002/grl.50383

Key Points

  • Boundary of heliosphere is very sudden
  • Local galactic cosmic ray spectra have peak at 60 MeV
  • Particle layers observed near heliospheric boundary

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