Now showing items 1-3 of 3

    • Correlation of long-term cosmic-ray modulation with solar activity parameters 

      Caballero-Lopez, R.A.; Engelbrecht, N.E.; Richardson, J.D. (IOP Publishing, 2019)
      In this work, we analyze the long-term cosmic-ray modulation observed by the Hermanus neutron monitor, which is the detector with the longest cosmic-ray record, from 1957 July. For our study we use the force-field approximation ...
    • On the pulse shape of ground-level enhancements 

      Strauss, R.D.; Ogunjobi, O.; Moraal, H.; McCracken, K.G.; Caballero-Lopez, R.A. (Springer, 2017)
      We study the temporal intensity profile, or pulse shape, of cosmic ray ground-level enhancements (GLEs) by calculating the rise (τr) and decay (τd) times for a small subset of all available events. Although these quantities ...
    • Spectral index of solar cosmic-ray flux from the analysis of ground-level enhancements 

      Caballero-Lopez, R.A.; Moraal, H. (Elsevier, 2016)
      In this work we analyze the ground-level enhancement of the cosmic-ray intensity due to solar energetic particles as observed on 29 September 1989, by using two pairs of standard and lead-free neutron monitors. This enables ...