Brief report of the macroseismic effects. Comparison of the distribution of the seismic effects with the strongly shaken area of the previous widespread earthquake of August 27, 1886. Critical discussion of the perceptibly shaken area, with the resulting suggestion that the depth of the focus may have been between 28 and 42 kilometers, greater than that of most destructive earthquakes of Greece. There is emphasized the lack of conductibility in the crystalline mass of Cyclades and, conversely, the activity of the Ionian-Cretan conducting line. The perfect coincidence of the locus of origin with the west trench fault of the Gulf of Messinia is taken as suggesting a tectonic origin.