During the statistical evaluation of fault plane solutions of earthquakes, one problem is posed by the fact that, for many earthquakes, a whole series of fault plane solutions (by different investigators) is available, from which, somehow, a “representative” solution must be extracted. The significance of regularities in such multiple solutions is discussed; it is shown that the P(maximum compressional) and T(maximum tensional) directions are representative of preponderant readings on the seismograms concerned. It then follows that a “representative” solution can be obtained by treating the individual P and T directions as if they were dilatational and compressional “readings,” respectively, and by constructing a fault plane solution from them. An example is given.

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