In this paper two approaches have been used for delineating a magnitude scale for local and near earthquakes of Aswan High Dam Lake (Aswan, Egypt), depending on either the total duration of oscillation or the maximum S-wave amplitude. In using the first approach, 19 local and near earthquakes in the period from 1982 to 1987 recorded by the Aswan Seismic Network were collected. A relation between F-P's (duration) recorded at the GMR station and their magnitudes reported by ISC Bulletin has been established, and it yields the following equation: M = 2.17 log (F-P)-1.3 + 0.00075-DELTA.In the second approach, the maximum ground S-wave amplitude in millimicrons for the micro-earthquakes from three zones were measured and plotted against the mean magnitude (calculated by the previous relation). Applying the method of linear least-squares fitting, a magnitude equation for each station could be obtained. The standard deviations and standard errors of magnitude have been determined. The resulting errors of the magnitude units are within the permissible error in such magnitude determinations.
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