Isotropy of ultra-high-energy cosmic rays and multiple supernova I galactic source

Ultra-high-energy cosmic rays are usually associated with an extragalactic origin. Active galactic nuclei are an unlikely source because of photon drag. Here the possibility of supernova events are considered. The time spread of arrival of 1020 eV protons is 100 to 400 years at 10 to 20 kpc and the angular spread is +-15 to +-300 depending upon the Galactic field configuration. The time spread is sufficient to include several to a dozen type I SN. This is enough events and angular spread to include the observed data. The concentration of the observed events at the galactic poles is contradictory. The flux is reasonable if the observed flux and slope at 1012 to 1015 eV is characteristic of the source(s) and confined at this energy for roughly 100 traversals of the Galaxy, or 3 x 106 years