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There are many seismological differences between earthquake and nuclear explosions, but not all of them are observable at large distances or are applicable to every earthquake and explosion. Several discriminations have been checked using the Aswan Seismic Network (ASN) data. Data of 66 earthquakes and 42 presumed underground explosions which occurred in different regions of China, the U.S.S.R., India, Iran, Turkey and recorded at ASN were collected. All data were selected from the NEIC catalogue and EDR reports. It was found that mb: Msas well as mb(1 Hz): mb (2 Hz) work well for events with mb larger than 4.0 from data observed at ASN and obtained from the NEIC catalogue.

Synopsis The Aswan Seismic Net work det ected and observed a number of event s near Aswan ci ty. The magnitude of these event s ranged from 0.9 to 2.6. These event s were considered very important events because they were located not far from the Aswan High Dam. The m ain purpose o f th is wo rk is to in vestigate an d id entify th ese events using di fferent sei smic m ethods. Sm all eart hquakes and expl osions have t he sam e fl at displacement spectrum for short-period P wa ves and discrim ination of sm all events depends on det ection and location. The final resul ts i ndicate t hat the sources of t hese events are natural earthquakes.

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