sentences:  A total of 293 aftershocks took place between 28 December 1908 and 11 March 1909.In 2008 it was proposed that the concurrent tsunami was not generated by the earthquake, but rather by a large undersea landslide it triggered.The probable source of the tsunami was offshore of Giardini Naxos (40 km south of Messina) on the Sicilian coast where a large submarine landslide body with a headwall scarp was revealed on a Bathymetric map of the Ionian seafloor.