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The Central System (CS) or Spanish Central System forms part of two of the five morphotectonic mesoblocks that make up the Intermediate macroblock (number 6) of the Iberian plate. The combination of geological, geophysical and geomorphological data, used in accordance with the Rantsman methodology (1979), served as the basis for obtaining a regional analysis. The cartography obtained shows territorial units (4 macroblocks, 4 mesoblocks, 35 blocks, 85 microblocks and 162 nanoblocks), morphotectonic alignments (quantity/order: 3/2, 4/3, 5/23, 6/48, 7/93 and 8/164) and morphotectonic knots (quantity/order: 1/2, 5/3, 35/4, 85/5, 162/6, 324/7, 816/8). The number of delimited morphostructures increases from the central part towards the east. At the block level, one may distinguish a transverse differentiation of the territorial units and alignments, which is interpreted as an expression of the region’s lithospheric heterogeneity. There is a close relationship between the morphostructures and seismicity, indicating that greater activity occurs in the blocks of the eastern and northeastern sectors.

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Damage and parameters of the earthquakes of October 14, 1800, September 18, 1826, and July 7, 1842, in Santiago de Cuba, in southeastern Cuba, have been studied. A quantitative re-evaluation of the size of the events is not feasible due to a lack of data. Hence, we have reinterpreted existing data to establish likely intensities and determine the epicentral region of occurrence. Available data do not permit accurate depth determinations. Intensities estimated from contemporary documentary sources give maximum values of 8, 8–9 and 8 (MSK scale), respectively. These seismic shocks were located in the Southeastern Seismotectonic Province of Cuba, Plate Boundary Zone Caribbean—North Atmerican. The earthquakes are associated with the Oriente fault system.