## 5 Discussion  
This work explores earthquake-triggered landslides (ETL) on the island of Cephalonia, one of the most active areas in the Mediterranean region. The study addresses the gap in the record of past events and examines the ETL susceptibility of the island exploiting the long record that has been created. Given the rich record of the identified ETL phenomena, the island is considered to be particularly prone to slope failures due to earthquakes. From the implemented inventory, it is concluded that 67 cases were induced by earthquakes in Cephalonia from 1636 to 2014, with most of them being triggered by the 12 August 1953 earthquake (30 cases, 44.78%). The majority of failures have been reported from earthquakes after 1900 (Figure 12). Although historical earthquakes that have affected Cephalonia had magnitudes larger than 5.9, information on environmental effects, despite their important impacts, is limited. This does not mean that these events did not cause such effects, but it is probably due to the fact that the interest of residents, authorities and researchers at the time was mainly focused on damage to buildings which were mainly associated with unpleasant effects on the local population. In addition, the earthquake effects resulted usually in heavy damage of the road network, disrupting transportation between local villages, making it impossible for researchers to record the complete impact of earthquakes on both the natural environment and the building stock. This situation seems to have changed after the first half of the 20 th century, as evidenced by the plethora of recorded landslides caused by the 1953, 1983 and 2014 earthquakes. Figure 11: ROC graph and AUC for the landslide susceptibility model applied for Cephalonia. Based on the rich record of ETL developed, it was possible to validate the result of landslide susceptibility analysis in terms of spatial distribution. In the course of this analysis, we used not only morphological and geological variables as the causative factors, but also seismological, hydrometeorological and environmental parameters, in order to effectively identify and precisely map the most susceptible zones in the island. Both from the landslide susceptibility map individually and from the comparison of the historical and landslide susceptibility maps, it was found that the spatial distribution of the studied effects in Cephalonia is not random. They were mainly generated in certain zones with high to critically high susceptibility to landslide triggering in the case of strong earthquake ground motion. These zones include the following from north to south:  
* The northern margins of Pylaros valley, located between Kalon Mt to the north and Ayia Dynati to the south, constitutes one for the most susceptible zones. Along the southern slopes of Kalon Mt, the Ayia Efimia oblique slip reverse fault occurs, which has formed a highly fractured and deformed rock mass, susceptible to slope failure from earthquakes. This situation is highlighted not only by the slope failures generated during the 1953 earthquakes at Lekatsata, Logarata and Karousata villages (Figure 4), but also by similar impressive effects that have taken place further west, in the coastal area of Myrtos bay during the occurrence of the devastating earthquakes of 1953, 1983 and 2014 [10; 62; 64], which resulted in damage and destruction of adjacent sections of the road network and temporary traffic disruption. It is important to mention that the coastal area of Myrtos is particularly prone to slope failures, caused not only by earthquakes, but also during extreme hydro-meteorological events.