## 1 Introduction  
Among the earthquake environmental effects (EEE) as defined by [PERSON] et al. [1], the earthquake-triggered landslides (ETL) prevail in a variety of environments from coastal to mountainous areas. They are characterized by high potential to cause not only economic but also human losses [2; 3; 4; 5]. Casualties due to ETL are attributed to the collapse of buildings and other infrastructure due to slope failures and mobilization of unstable geological formations [6], as well as to the transport of material with high velocities over terrains with gentle slopes [7]. ETL are responsible for the 70% of all earthquake-induced human losses, which are not directly attributed to the earthquake ground motion [2], but to secondary phenomena. At least 90% of the ETL fatalities are attributed to rockfalls, rock avalanches and rapid soil flows, despite the fact that rock avalanches and rapid soil flows are neither common nor frequent events [7]. The consequences of ETL on society are not only direct, i.e., destruction of buildings and infrastructure, but also indirect, being associated with failures and damage to lifelines including road network, dams and utilities (e.g., [8; 9; 10]). This damage has high potential to cause disruption of various socio-economic activities including transportation as well as communication breakdown. This, in turn, can result in a delay in the emergency response and recovery actions and an increase in the number of casualties, due to delayed first aid and transport of the injured to health facilities. ETL have been reported since 1789 BC in China [11]. The most used ETL classification has been provided by [PERSON] [7], who has analyzed data from a set of 40 historical earthquakes worldwide having a magnitude ranging from 5.2 to 9.5 and generating in a variety of geographic, geological and seismotectonic environments. This classification is based on the nature of the movement, the degree of the internal disruption of the mobilized material and the morphological, lithological and geological properties of the affected areas. Fourteen individual types of ETL are classified into three main categories: (i) disrupted slides and falls, (ii) coherent slides and (iii) lateral spreads and flows [7]. The first category comprises falls, slides and avalanches in rocks and soils, the second one slumps and block slides in rocks and soils as well as slow earth flows and the third one soil lateral spreads, rapid soil flows and subaqueous landslides [7]. The most common type of ETL comprises highly disrupted landslides, which includes falls, slides and avalanches involving either rock or soil, generated along steep source slopes and extending further on relatively gentle slopes [7; 12]. The total number of ETL generally increases with earthquake magnitude [7] ranging from a few tens for the majority of M < 5.5 earthquakes to several thousand in M > 8.0 earthquakes. Since the extensive research on ETL worldwide conducted by [PERSON] [7] and [PERSON] et al. [13], several ETL studies have been performed both at national and local level. Among others, [PERSON] et al. [14; 15] and [PERSON] et al. [16] have published relevant research and databases for New Zealand, [PERSON] and [PERSON] [17] for Greece, and [PERSON] and [PERSON] [18] and [PERSON] et al. [19] for Italy. Taking into account the existing literature on seismicity and EEE in the Mediterranean, we see that the Lefkada, Cephalonia, Ithaki and Zakythnos islands have been repeatedly hit by strong and destructive earthquakes with many triggered EEE (e.g., [PERSON] et al. [20] for Lefkada Island and [PERSON] et al. [21] for Zakythnos Island). This strong seismicity is attributed to the proximity of the southern Ionian Islands to the: (i) Cephalonia Transform Fault Zone (CTFZ), which is a NE-SW striking and SE-dipping right-lateral strike-slip fault zone, the most seismic active structure in Greece and the Eastern Mediterranean and (ii) the northwestern part of the Hellenic Trench, along which the African plate is subducting beneath Eurasia (Figure 1).