Abstract
Strong earthquakes can trigger several phenomena inducing soil deformation, such as liquefaction, ground fracturing and landslides, which can often cause more damage than the seismic shaking itself. A research performed on numerous historical accounts reporting descriptions of seismogeological effects in central-eastern Sicily, allowed the authors to update the previous liquefaction datasets. 75 liquefaction-induced phenomena observed in 26 sites, triggered by 14 earthquakes, have been used to define relationships between intensity/magnitude values and epicentral distance from the liquefied sites. The proposed upper bound-curves, at regional scale for central- eastern Sicily, are realized by using the updating liquefaction dataset and also the new CPTI04 Italian earthquake parametric catalogue. These relationships can be useful in hazard assessment to evaluate the minimum energy of an earthquake inducing liquefactions.
Highlights
Liquefaction is one of the most common ground deformation effects of earthquakes and often a major cause of damage and destruction to buildings and infrastructures
This paper presents an updated dataset of liquefaction phenomena in central-eastern Sicily, realized through the revision of historical accounts, retrieved from the aforementioned catalogues and through an original research of historical primary sources
The epicentres of the 1783 and 1894 earthquakes are localized in Southern Calabria; the 1908 event is located in the Messina Strait; the 1169 and 1542 sources are close to the southeastern coast of Sicily, the 1978 epicentre is located in the Tyrrhenian Sea
Summary
Liquefaction is one of the most common ground deformation effects of earthquakes and often a major cause of damage and destruction to buildings and infrastructures. Numerous and widespread liquefaction phenomena have been triggered by earthquakes in several places of the world and many studies have revealed a strong relationship between earthquake parameters and maximum epicentral or fault distance from the sites in which liquefaction develops. Italian historical records offer several descriptions of seismogeological effects which occurred during the last millennium, such as landslides, liquefaction and ground fracturing. These records were used to compile several catalogues and liquefaction prone area maps
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