Mitchel (1992:116) reports that a "massive tumble" was discovered at the foot of the Stratum 11 monumental stairway. The rocks appear to have tumbled westward due to a failure of a retaining wall (D.3:16A) at the east margin of the stairs. Mitchel (1992) and Mitchel (1980) surmised that this tumble was due to an earthquake. Stratum 11 destruction evidence was not found elsewhere on the site except for a cistern in Square C.5 (C.5:228) which was put out of use after the end of Stratum 11. Later building activity such as earth-moving and stone robbing was presumed to have obliterated some Stratum 11 destruction evidence, particularly in Area A and also in Area C.

Dating was based on coins and pottery. A coin of Constans I which dated to 343 CE was found within Stratum 11 in locus C.5:219 and another coin of Constans I which also dated to 343 CE was found in Area A (locus A.5:23) in Stratum 10 above Stratum 11. Complicating things slightly, an Ayyubid coin was found in a questionable Stratum 11 locus (A.2:23) that appeared to contain mixed material from multiple strata. Together, the coin and pottery evidence points towards a destruction date in the second half of the 4th century CE.

Mitchel (1992:116) suggested parallel archaeoseismic evidence in was present in ʿAraq el-Emir, Kerak, Khirbet Ader, and Avdat.