No specific geological studies exist to date concerning the identification and 
characterisation of the seismogenic potential of the Cividale Source. 
Nevertheless, information on the location and  geometry of the source, causative 
fault of the Me=6.8 1511 Slovenia earthquake, can be obtained from several 
papers dealing with the neotectonic evolution of the Friuli region. Additional 
information on the associated earthquake may be retrieved from the "Catalogue of 
Strong Italian Earthquakes, 461 b.C. to 1990" (Boschi et al., 1997), also 
available from http://www.ingv.it/.

Ribaric (1979)
This paper re-evaluates the historical data for the March 26, 1511 earthquake, 
and based on the time distribution indicated by various sources proposes the 
occurrence of two main shocks on the same day. According to this reconstruction 
the first of the two shocks (around 15h) had the strongest effects in the region 
of western Slovenia, while the second (around 20h) hit mainly the Friuli area. 
The author also suggests a possible association of the two shocks with two 
distinct WNW-ESE and NW-SE-striking faults, both belonging to the Dinaric 
system.

Boschi et al. (1997).
This catalogue reviews the hypothesys of the two shocks for the 1511 earthquake 
proposed by Ribaric (1979), and points out that his conclusions are affected by 
problems in the conversion of the different local times used at the time of the 
earthquake in Slovenjia and Friuli. Following this reevaluation the 1511 event 
was characterised by a main shock at 14h that produced its strongest effects in 
Friuli (Tagliamento valley) and in western Slovenjia.
