slight increase with increasing seismic moment in the range 3 x 10" to 5 x 10" dyn cm, while the increase is more rapid for larger events. Baltic Shield earthquakes show increasing stress drops, ranging from about 0.1 to 10 bars, for increasing seismic moment. The relatively low stress drops could, in part, be explained by bias due to band-limited analog data.The slope of the curve relating seismic moment to comer frequency is steeper than -3, which suggests a departure from a constant stress drop scaling relation proposed for large earthquakes. The derived relationship between the seismic moment (Mc) and magnitude (ML) is: log M,, = 16.93 + 1.01 M, (for 2 d M, < 5.2).

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