## 3 ETL Inventory in Cephalonia Island
### Methodology  
Landslide inventories are essential for predicting future landslides generation on the basis of past conditions [52]. In order to compile a landslide inventory, various mapping approaches can be applied comprising visual interpretation of aerial and satellite imagery and field surveys and mapping, supported by investigation of contemporary sources and post-event field survey reports [52,53]. The resulting landslide inventories are classified into (i) geomorphological inventories, resulted from respective features of the study area, (ii) event inventories, associated with a specific causative event including mainly earthquakes and rainfalls, (iii) multi-temporal inventories of an area for different time periods and (iv) historical inventories for respective time periods and events [52,53].  
We conducted a re-examination of the available scientific literature for historical earthquakes of Cephalonia Island with emphasis on their environmental effects and especially on the ETL. Due to the limited related information in the existing scientific literature (e.g., [41,42,54]), we expanded our search to contemporary sources, including not only post-event field survey reports (e.g., the report of the Institute of Geology and Underground Research [55]), but also daily press databases comprising newspapers of local and national circulation.  
The newspaper databases comprised (Table 1):  
* The Press Museum of the Peloponnese--Epirus--Ionian Islands Daily Newspaper Editors Association [56];
* The Digital Historical Archive of the Lambrakis Press Group [57];
* The Digital Library of Newspapers and Magazines of the National Library of Greece [58];
* The Digital Library of the Greek Parliament [59].  
The Press Museum was founded by the Association of Editors of Daily Newspapers of Peloponnese-Epirus-Islands, was based in Patras (Northwestern Peloponnese) in 1956 and has been operating since 28 May 1957. Its purpose is the collection and preservation of newspapers, magazines, manuscripts and other publications from previous centuries to present, which constitute knowledge and information sources about the history of the area. Through this website, we were given the opportunity to search for newspaper clippings about the August 1953 earthquakes. In particular, four newspapers were found (Table 1), which provided important information about the environmental effects triggered by the August 1953 earthquakes:  
* ETHNIKOS KIRIX (in Greek: E  
The Digital Library of Newspapers and Magazines of the National Library of Greece includes digitized archives of newspaper sheets. Through the website of the digital library, we searched information for the post-earthquake period from two newspapers (Table 1):  
* ANAMORFOSIS (Greek: AVA\(\  
destructive events in the recent history of Greece. In particular, the latter study reconstructed a complete picture of the primary and secondary effects on the environment of the Cephalonia, Ithaki and Zakynthos Islands induced by the mainshock of 12 August, and its large foreshocks that occurred on 9 and 11 August. [PERSON] and [PERSON] [64] reported detailed macroseismic observations of the earthquake in Argostoli, Sami, Lixouri and Fiskardo and their surroundings and presented environmental effects triggered by the earthquake comprising rockfalls and ground failures related to liquefaction phenomena. [PERSON] and [PERSON] [62; 63] presented the environmental effects triggered by the early 2014 Cephalonia earthquakes (Mw = 6.1 on January 26 and Mw = 5.9 on February 3) along with the ESI-07 intensities based on the qualitative and quantitative information of the generated coseismic and secondary phenomena.  
The majority of the extracted information was also verified during field surveys and campaigns held in Cephalonia after their extraction from the aforementioned contemporary sources.