  We present the results of a search for time correlations in high energy
cosmic ray data (primary E > 10^14 eV) collected by the California HIgh school
Cosmic ray ObServatory (CHICOS) array. Data from 69 detector sites spread over
an area of 400 km^2 were studied for evidence of isolated events separated by
more than 1 km with coincidence times ranging from 1 microseconds up to 1
second. We report upper limits for the coincidence probability as a function of
coincidence time.
