  The Gerasimova-Zatsepin effect of collisions of ultra-high-energy cosmic ray
nuclei with photons emitted by the sun may cause two simultaneous air showers
on Earth. This effect is simulated using the full energy spectrum of solar
photons, ray tracing through the interplanetary magnetic field and upper limit
values for the iron and oxygen cosmic ray fluxes. Only the most abundant
interactions in which a single proton is emitted from the nucleus are
considered. For the first time the distributions of distances between the
individual showers at Earth as a function of the distance of the primary cosmic
ray to the Sun are shown. These distributions are used to estimate the
capabilities of current detector arrays to measure the Gerasimova-Zatsepin
effect and to show that a dedicated array is capable of measuring this effect.
