Haynes et al. (2006) examined paleoseismic and archeoseismic evidence related to damage to a late Byzantine—Early Umayyad birkeh (water reservoir) and aqueduct at Qasr Tilah and concluded that left lateral slip generated by several earthquakes cut through a corner of the reservoir and aqueduct creating displacement of the structures. They identified 4 seismic events which produced coseismic slip on the Wadi Arava fault and led to a lateral displacement of 2.2. +/- 0.5 m at the northwest corner of the reservoir (aka birkeh) and 1.6 +/- 0.4 m of the aqueduct.
The fault strand that moved during the most recent event (MRE) terminates 2-4 cm below the surface and juxtaposes unit j and younger stratigraphic layers (Figure 5). This fault strand is capped by unit a, the modern ground surface. A definite date cannot be assigned to this event because any stratigraphic units that may have originally buried unit j were eroded prior to the deposition of unit a. However, an Ottoman period musket ball near the base of unit a establishes the minimum date for the MRE is pre-1918, the end of Ottoman occupation of the region. The maximum age for the MRE is 1515, the beginning of Ottoman occupation, based on the truncation of layer b, which, by virtue of the musket ball in unit a, is older than 1515-1918.
The penultimate event (II) offsets units e, f, and g and the underlying layers.
... The fault terminates at the top of unit e, which indicates that unit e was the ground surface at the time of the earthquake. Unit e is capped by the undeformed unit d, which, due to its radiocarbon date of 986-1155 A.D. (Figure 5), limits the minimum date for event II to the twelfth century. The maximum date for event II is post seventh century abandonment of the site in underlying layers.
... Event II could not have occurred in 1458, 1293, or 1212. The tenth to twelfth century date of unit d, suggests that the minimum age of Event II is tenth century.
The antepenultimate event (III) is marked by the rupture trace being buried by unit e. Units f, g, h, and k are offset. Fault terminations at the top of units f and g suggest that this was the ground surface at the time of event III, and therefore, it also occurred after the seventh century. The minimum date for event III cannot be earlier than the basal age of unit d (986-1155 A.D.).
... Unit e caps buries the fault strands that define Event III. The overlying unit d has a radiocarbon-constrained age range between the tenth to twelfth century, and the underlying units f, g, and h contain aqueduct rubble and potsherds from the seventh century. Therefore, the age of unit e is constrained to seventh to twelfth century.
MacDonald (1992)  collected some Byzantine and Umayyad surface potsherds at the site and documented ruins of Byzantine houses (village) along the fan surface of Wadi Tilah.If the repair fixed a problem caused by lateral slip rather than generalized destructive shaking, the slip would indicate that part of the Araba fault broke during this event.
Wells and Coppersmith (1994)
|Variable||Output - not considering a Site Effect||Units||Notes|
|unitless||Moment Magnitude for Avg. Displacement|
|unitless||Moment Magnitude for Max. Displacement|