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Updating the macroseismic intensity database of 19th century damaging earthquakes in Greece: a case study in Samos Island

Kouskouna Vasiliki

Acta Geophysica

2021

Vol. 69, no. 3

1101--1111

Sources containing descriptive information on earthquake efects in Greece from the period 1800–1899 are analysed and EMS-98 macroseismic intensities are assigned, aiming at the enrichment of the number of macroseismic datapoints contained in the Hellenic Macroseismic Database (HMDB.UoA). Based on the information provided by the analysis, intensities were re-assigned for all events reported in the sources. Compared to the MDPs presented in the Hellenic Macroseismic database, the total number of MDPs from the present study is more than double. Similar procedure was applied to the 19th century Samos and surrounding areas earthquakes including all macroseismic intensity degrees. For the case study of Samos, two macroseismic intensity data sets are presented: the damaging (IEMS98>6) and the non-damaging ones. The macroseismic parameters of one new earthquake were determined and the seismic history of the island showed that two earthquakes, probably similar to the 30 October 2020 Samos event, occurred in the 19th century. New earthquakes improve the seismic history and increased MDPs number allow for more accurate parameters assessment.