  We have analysed arrival times of extensive air showers (EAS) registered with
the EAS-1000 prototype array during the period from August, 1997 till February,
1999. Our analysis has revealed that though the vast majority of samples of
consecutive time intervals between EAS arrival times obey the exponential
distribution, there are sequences of showers that have another distribution and
thus violate the homogeneity hypothesis. The search for correlation between
such events and clusters of showers and events with big delays between arrival
times was also carried out.
