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AILA QUAKE

1st half of 4th century CE

by Jefferson Williams









Introduction & Summary

Thomas et al (2007) uncovered earthquake damage to Late Roman/Early Byzantine structures in Aila which they dated between ca. 320 CE and 363 CE. There are no known textual accounts of an earthquake during this time although there is a mysterious and quite possibly false report of a tsunami in the Dead Sea in 315 CE.

Textual Evidence

Archaeoseismic Evidence

Location (with hotlink) Status Intensity Notes
Aqaba/Eilat - Introduction n/a n/a n/a
Aqaba - Aila definitive ≥ 8 Earthquake VI - 1st half of 4th century CE - Thomas et al (2007) identified earthquake destruction (Earthquake VI) in a collapse layer which they dated to the 4th century but before the southern Cyril Quake of 363 CE. In describing the Phase 2 layer below the collapse layer they provided a terminus post quem of ca. 320 CE
During the early fourth century, the monumental building was expanded and concluded with the final addition of Rooms 11 and 12 constructed after ca. A.D. 320. The upper sequences of floors contained Early Byzantine pottery of the mid to late fourth century.
The terminus ante quem is 363 CE when the southern Cyril Quake is presumed to have created the damage observed in Earthquake V.
This seismic event must have occurred at some point in the mid to late fourth century A.D. but before the final extensive collapse of the complex in Earthquake V [363 CE].
Masada possible ≥ 8 2nd - 4th century CE Earthquake - Netzer (1991:655) reports that a great earthquake [] destroyed most of the walls on Masada sometime during the 2nd to 4th centuries CE.

In an earlier publication, Yadin (1965:30) noted that the Caldarium was filled as a result of earthquakes by massive debris of stones. Yadin concluded that the finds on the floors of the bath-house represent the last stage in the stay of the Roman garrison at Masada. The stationing of a Roman Garrison after the conquest of Masada in 73 or 74 CE was reported by Josephus in his Book The Jewish War where he says in Book VII Chapter 10 Paragraph 1
WHEN Masada was thus taken, the general left a garrison in the fortress to keep it, and he himself went away to Caesarea; for there were now no enemies left in the country, but it was all overthrown by so long a war.
Yadin (1965:36)'s evidence for proof of the stationing of the Roman garrison follows:
We have clear proof that the bath-house was in use in the period of the Roman garrison - in particular, a number of "vouchers" written in Latin and coins which were found mainly in the ash waste of the furnace (locus 126, see p. 42). Of particular importance is a coin from the time of Trajan, found in the caldarium, which was struck at Tiberias towards the end of the first century C.E.*
The latest coin discovered from this occupation phase was found in one of the northern rooms of Building VII and dates to 110/111 CE (Yadin, 1965:119)**. Yadin (1965:119) interpreted this to mean that, this meant that the Roman garrison stayed at Masada at least till the year 111 and most probably several years later. Russell (1985) used this 110/111 coin as a terminus post quem for the Incense Road Earthquake while using a dedicatory inscription at Petra for a terminus ante quem of 114 CE.Masada may be subject to seismic amplification due to a topographic or ridge effect as well as a slope effect for those structures built adjacent to the site's steep cliffs.
Petra - Introduction n/a n/a n/a
Petra - Petra Theater possible ≥ 8 Mid 4th century CE Earthquake - Russell (1980) reports that during the 1961-1962 seasons,
Hammond (1965:13-17) found evidence of 4th century AD architectural collapse while excavating the Main Theater. From the stratigraphic evidence and the recovery of two coins of Constantine I (ruled 306 - 337 AD) and one of Constantius II (ruled 337-361 AD), he was able to date this event to the mid 4th century.
Hammond (1964) labeled the destruction period as Period IV noting that
In this period the scaena and its stories, blockade walls, the tribunalia(e), and other built parts of the Theater were all cataclysmically destroyed.
likely due to southern Cyril Quake of 363 CE
Petra - Khubtha Cliff possible
Cave abandonment could be due to an Earthquake

Zayadine, F. (1973) excavated on the western slope of Khubta Cliff; uncovering a small dwelling in a cave in "Area A". Inside the cave, Zayadine (1973), found objects dated to the beginning of the 4th century AD noting that "it was tempting to consider that the cave was abandoned after an earthquake."

Petra - Wadi Sabra Theater possible ≥ 8
Phase 4 earthquake - Late Roman/Early Byzantine - not precisely dated

Tholbecq et al (2019) reports destruction of the northern masonry of the orchestra during this phase. They deduce that this event (earthquake?) occurs shortly after the late Roman period, or even during this period.

Petra - Jabal Khubthah possible ≥ 8 End of Phase 2 Earthquake - 4th century CE ? - Fiema in Tholbecq et al (2019) acknowledged difficulties in dating this presumed seismic destruction but suggested that the southern Cyril Quake of 363 CE was responsible.
Petra - Qasr Bint possible ≥ 8 3rd-4th century CE Earthquake - Tholbecq et al (2019:36-37) attributed a destruction layer (see Figures 11 and 12) to the southern Cyril Quake of 363 CE based on excavations of the western Temple Staircase (peribola) in Zone F of Qasr al Bint. The dating is approximate - to the 3rd or 4th century CE - apparently based on pottery fragments (North African Sigillata) and oil lamps. Colluvium atop the destruction layer suggests partial abandonment of the site after the destructive earthquake.
Petra - Jabal Harun possible ≥ 8 Pre-Monastic Phasing Destruction Event (IV) - 363 CE or an earthquake from around that time - In Appendix C of the Petra - the mountain of Aaron : the Finnish archaeological project in Jordan., one can find Pre-Monastic Phasing. Phase IV is listed as a destruction layer attributed to the 363 CE earthquake. However, if one considers the dates for the phases before and after Phase IV in Appendix C, it appears that other earthquakes are also plausible candidates such as the Aila Quake of the 1st half of the 4th century and the Monaxius and Plinta Quake of 419 CE. Some of the reasoning behind assigning a 363 CE date to this presumed seismic destruction was based on the southern Cyril Quake of 363 CE being assigned to seismic destruction at other sites in Petra.
Haluza possible ≥ 8
1st Earthquake - late 3rd - mid 6th century CE - perhaps around 500 CE

Korjenkov and and Mazor (2005) surmised that the first earthquake struck in the Byzantine period between the end of the 3rd and the mid-6th centuries A.D.. Citing Avraham Negev, they discussed this evidence further

Negev (1989) pointed out that one earthquake, or more, shattered the towns of central Negev between the end of the 3rd and mid-6th centuries A.D.. Literary evidence is scarce, but there is ample archeological evidence of these disasters. According to Negev a decisive factor is that the churches throughout the whole Negev were extensively restored later on. Negev found at the Haluza Cathedral indications of two constructional phases. One room of the Cathedral was even not cleaned after an event during which it was filled with fallen stones and debris from the collapsed upper portion of a wall. In the other room the original limestone slabs of the floor had been removed but the clear impression of slabs and ridges in the hard packed earth beneath suggests that they remained in place until the building went out of use (Negev, 1989:135).

The dating of the discussed ancient strong earthquake may be 363 A.D., as has been concluded for other ancient cities around Haluza, e.g. Avdat37, Shivta38, and Mamshit39. However, Negev (1989:129-142) noticed inscriptions on walls and artifacts.
The inscriptions Negev noticed were discovered at Shivta which Negev (1989) discussed as follows:
A severe earthquake afflicted Sobata [aka Shivta].
...
The epigraphic evidence of Sobata may help in attaining a close as possible date both for the earthquake and for the subsequent reconstruction of the North Church. One of these inscriptions, that of 506 A.D., is clearly a dedicatory inscription of a very important building, which justified the participation of a Vicarius, a man of the highest rank, in the dedication of this building. This inscription was not found in situ. However, there is no question about the inscription of A.D. 512, in which year the mosaic floor of one of the added chapels was dedicated by a bishop and the local clergy. It is thus safe to assume that the whole remodeling of the North Church began in the first decade of the sixth century.
Although Negev (1989) and Korjenkov and and Mazor (2005) suggested the Fire in the Sky Earthquake of 502 CE as the most likely candidate, its epicenter was too far away to caused widespread damage throughout the region. This suggests that the causitive earthquake is unreported in the historical sources - an earthquake which likely struck at the end of the 5th or beginning of the 6th century CE. This hypothesized earthquake is listed in this catalog as the Negev Quake.

Mampsis possible ≥ 8 First Earthquake - Early Byzantine ? - Negev (1974) dated the first earthquake to late 3rd/early 4th century via coins and church architectural styles however he dates construction of the East Church, where some archaeoseismic evidence for the first earthquake was found, to the 2nd half of the 4th century CE. Given this apparent contradiction, I am labeling the date of the first earthquake at Mamphis as "Early Byzantine ?". Korzhenkov and Mazor (2003) characterized this as a strong earthquake with an epicenter at the north, and an EMS-98 scale intensity of IX or more with an epicenter some distance away

Kamai and Hatzor and Kamai and Hatzor (2007) estimate Intensity of ~7 - 8 based on DDA of a dropped keystone in an arch in Mampsis.
Khirbet Tannur possible 5-8 Two possibilities

End of Period II Earthquake (?) - 3rd century CE - The end of Period II would have occurred shortly before Period III construction which McKenzie et al (2013:62) suggests probably began in the 3rd century CE in association with other repairs after an earthquake. It appears that this date is extrapolated from the date for Period II construction which is chronologically anchored by pottery found in stratigraphic position. McKenzie et al (2002:73) noted similarities in the sculpture of Period III with late antique sculpture in Egypt which suggests the possibility of a date in the third century A.D.. Glueck (1965:106) was not entirely sure that Period II ended with an earthquake stating that earthquake tremors or age or both may have brought about the collapse of the Period II Altar-Base. Glueck (1965:106) characterized Altar-Base II as aesthetically attractive but architecturally weak noting shoddy internal construction particularly the bottom foundation stones (Glueck, 1965:107).

"Further" Earthquake of McKenzie et al (2013) - 3rd - 4th century CE - McKenzie et al (2013:62) reports a further earthquake after Period II construction damaged the colonnades of the Court and that the steps of the Altar Platform were repaired using column drums.
el-Lejjun possible ≥ 7 Possible predecessor earthquake in the early 4th century CE - Lain and Parker (2006:144) report that a beaten earth floor and ash layer in Room A.13 which ante-dated the 1st earthquake (Stratum VI-VB) was chock-full of tile fragments suggesting an apparent roof collapse due to an unknown cause. Such "collapse" debris was not found in any other excavation areas. The floor would have been built after initial construction of the fort which Parker (2006) dates to around 300 CE based on ceramic evidence.
Location (with hotlink) Status Intensity Notes
Aqaba/Eilat - Introduction



Aqaba/Eilat - Aila



Masada



Petra - Introduction



Petra - Petra Theater



Petra - Khubtha Cliff



Petra - Wadi Sabra Theater



Petra - Jabal Khubthah



Petra - Qasr Bint



Petra - Jabal Harun



Haluza



Mampsis



Khirbet Tannur



el-Lejjun



Tsunamogenic Evidence

Location (with hotlink) Status Intensity Notes
Dead Sea unlikely Ambraseys (1962) and Antonopolous (1979) report a tsunami in the Dead Sea in 315 CE based on reports in difficult to find sources. Ambraseys (1962) suspects the tsunami was actually in Lake Van in Armenian Turkey in 344 or 345 CE and he is probably correct.
Location (with hotlink) Status Intensity Notes
Dead Sea



Paleoseismic Evidence

Location (with hotlink) Status Intensity Notes
al-Harif Syria unlikely ≥ 7 Sbeinati et. al. (2010) report a seismic event X which they dated to 335 AD ± 175 years. Estimated Mw = 7.3 - 7.6 based on 4.3 m of slip.
Qiryat-Shemona Rockfalls unlikely 9 Kanari, M. (2008) examined rockfalls in Qiryat-Shemona which were attributed to earthquakes. Optically stimulated luminescence (OSL) dating was performed on soil samples beneath the fallen rocks. Kanari et al (2019) proposed that rockfalls QS-3 and QS-11 were most likely triggered by the northern Cyril Quake of 363 CE. Their discussion is quoted below:
QS-3 (1.6±0.1 ka) and QS-11 (1.7±0.2 ka) fit the historical earthquakes of 363 and 502 CE, and only lack 40 years in error margin to fit the one of 551 CE. Since the 502 CE earthquake was reported on shoreline localities only in the DST area, we find the 363 CE earthquake to be a better rockfall-triggering candidate. We suggest that the two ages are clustered around one of these earthquakes, hence suggesting they represent one rockfall event in the 363 CE earthquake. However, we cannot completely rule out the possibility that these were two separate rockfall events, both triggered by large earthquakes in 363 and 502/551 CE.
Bet Zayda unlikely ≥ 7 Wechsler at al. (2014) found three events which fit within the modeled ages for the Aila Quake however all three events seem more likely to have been a result of an earthquake with a closer epicenter.
Event Modeled Ages Most likely Earthquake Comments
CH4-E1 294-369 CE Northern Cyril Quake peak probability at 326±36 CE
CH4-E2 269-329 CE Beirut Conversion Quake Evidence for event CH4-E2 is weaker than that of some events
CH4-E3 250-310 CE Eusebius Martyr Quake
Dead Sea - Seismite Types n/a n/a n/a
ICDP Core 5017-1 possible 7 Lu et al (2020) associated a turbidite deposit in the core to one of the Cyril Quakes. CalBP is reported as 1636 ± 47. This works out to a date of 314 CE with a 1σ bound of 267-361 CE. Ages come from Kitagawa et al (2017). The deposit is described as a 11 cm. thick turbidite (MMD). Lu et al (2020) estimated local seismic intensity of VII which they converted to Peak Horizontal Ground Acceleration (PGA) of 0.18 g. Dr. Yin Lu relates that "this estimate was based on previous studies of turbidites around the world (thickness vs. MMI)" ( Moernaut et al (2014). The turbidite was identified in the depocenter composite core 5017-1 (Holes A-H).
En Feshka unlikely 7.9-8.8 Kagan et. al. (2011) identified two seismites at En Feshka which might match with the Aila Quake although both seem a better fit for the Monaxius and Plinta Quake of 419 CE.
Top Depth (cm.) Thickness (cm.) Seismite Type Modeled Age (± 1σ) Modeled Age (± 2σ)
220 2 4 462 AD ± 54 452 AD ± 118
228 1 4 430 AD ± 58 422 AD ± 126
En Gedi no evidence Migowski et. al. (2004) did not see any evidence for a 4th century CE seismite in En Gedi. See Paleoseismic Evidence Section for the Cyril Quakes for a more extensive discussion.
Nahal Ze 'elim unlikely At ZA-1, Ken-Tor et al. (2001a) assigned a seismite known as Event D to the Cyril Quake of 363 CE as did Williams (2004). It is possible but unlikely that this seismite was caused by the Aila Quake. At ZA-2, Kagan et. al. (2011) saw no evidence of an earthquake in the 4th century CE.
Araba - Introduction n/a n/a n/a
Taybeh Trench possible ≥ 7 LeFevre et al. (2018) might have seen evidence in the Taybeh Trench (Event E3 - Modeled Age 551 AD ± 264).
Qatar Trench possible ≥ 7 Klinger et. al. (2015) identified a seismic event (E6) in a trench near Qatar, Jordan in the Arava which they modeled between 9 BCE and 492 CE. The large spread in age caused them to consider two possible earthquakes as the cause; the early 2nd century CE Incense Road Quake and the southern Cyril Quake of 363 CE. They preferred the Cyril Quake of 363 CE based on weighing other evidence not related to their paleoseismic study and noted that further investigation was required.
Location (with hotlink) Status Intensity Notes
Displaced Aqueduct at al Harif, Syria

Sbeinati et. al. (2010) report a seismic event X which they dated to 335 AD ± 175 years.



Qiryat-Shemona Rockfalls

Kanari, M. (2008) examined rockfalls in Qiryat-Shemona which were attributed to earthquakes. Optically stimulated luminescence (OSL) dating was performed on soil samples beneath the fallen rocks. Kanari et al (2019) proposed that rockfalls QS-3 and QS-11 were most likely triggered by the northern Cyril Quake of 363 CE. Their discussion is quoted below:

QS-3 (1.6±0.1 ka) and QS-11 (1.7±0.2 ka) fit the historical earthquakes of 363 and 502 CE, and only lack 40 years in error margin to fit the one of 551 CE. Since the 502 CE earthquake was reported on shoreline localities only in the DST area, we find the 363 CE earthquake to be a better rockfall-triggering candidate. We suggest that the two ages are clustered around one of these earthquakes, hence suggesting they represent one rockfall event in the 363 CE earthquake. However, we cannot completely rule out the possibility that these were two separate rockfall events, both triggered by large earthquakes in 363 and 502/551 CE.


Bet Zayda (aka Beteiha)

Wechsler at al. (2014) found three events which fit within the modeled ages for the Aila Quake however all three events seem more likely to have been a result of an earthquake with a closer epicenter.

Event Modeled Ages Most likely Earthquake Comments
CH4-E1 294-369 CE Northern Cyril Quake peak probability at 326±36 CE
CH4-E2 269-329 CE Beirut Conversion Quake Evidence for event CH4-E2 is weaker than that of some events
CH4-E3 250-310 CE Eusebius Martyr Quake


Dead Sea - Seismite Types



Dead Sea - ICDP Core 5017-1

Lu et al (2020) associated a turbidite deposit in the core to one of the Cyril Quakes. CalBP is reported as 1636 ± 47. This works out to a date of 314 CE with a 1σ bound of 267-361 CE. Ages come from Kitagawa et al (2017). The deposit is described as a 11 cm. thick turbidite (MMD). Lu et al (2020) estimated local seismic intensity of VII which they converted to Peak Horizontal Ground Acceleration (PGA) of 0.18 g. Dr. Yin Lu relates that "this estimate was based on previous studies of turbidites around the world (thickness vs. MMI)" ( Moernaut et al (2014). The turbidite was identified in the depocenter composite core 5017-1 (Holes A-H).

See the following from Lu et al (2020b) regarding estimating intensity from turbidites:

Previous studies have revealed that the intensity threshold for triggering historic turbidites are variable in different regions and range from MMI V½ to VII½ (Howarth et al., 2014; Moernaut, 2020; Van Daele et al., 2015; Wilhelm et al., 2016). The intensity threshold constrained from the Dead Sea data (≥VI½) is situated in the middle of this range.

Previous studies in Chilean lakes have indicated that the (cumulative) thickness of historic turbidites across multiple cores correlates with seismic intensity, and can thus be used to infer paleo-intensities in this setting (Moernaut et al., 2014). However, in the case of the Dead Sea core 5017-1, there is a random relationship (a correlation factor of 0.04) between the thickness of prehistoric turbidites and seismic intensity (Figure 5a).


Dead Sea - En Feshka

Kagan et. al. (2011) identified two seismites at En Feshka which might match with the Aila Quake although both seem a better fit for the Monaxius and Plinta Quake of 419 CE.

Top Depth (cm.) Thickness (cm.) Seismite Type Modeled Age (± 1σ) Modeled Age (± 2σ)
220 2 4 462 AD ± 54 452 AD ± 118
228 1 4 430 AD ± 58 422 AD ± 126


Dead Sea - En Gedi

Migowski et. al. (2004) did not see any evidence for a 4th century CE seismite in En Gedi. See Paleoseismic Evidence Section for the Cyril Quakes for a more extensive discussion.



Dead Sea - Nahal Ze 'elim

At ZA-1, Ken-Tor et al. (2001a) assigned a seismite known as Event D to the Cyril Quake of 363 CE as did Williams (2004). It is possible but unlikely that this seismite was caused by the Aila Quake. At ZA-2, Kagan et. al. (2011) saw no evidence of an earthquake in the 4th century CE.



Araba - Introduction



Araba - Taybeh Trench

LeFevre et al. (2018) might have seen evidence in the Taybeh Trench (Event E3 - Modeled Age 551 AD ± 264).



Araba - Qatar Trench

Klinger et. al. (2015) identified a seismic event (E6) in a trench near Qatar, Jordan in the Arava which they modeled between 9 BCE and 492 CE. The large spread in age caused them to consider two possible earthquakes as the cause; the early 2nd century CE Incense Road Quake and the southern Cyril Quake of 363 CE. They preferred the Cyril Quake of 363 CE based on weighing other evidence not related to their paleoseismic study and noted that further investigation was required.



Notes

Paleoclimate - Droughts

References

References

Ambraseys, N. N. (1962). "Data for the investigation of the seismic sea-waves in the Eastern Mediterranean." Bulletin of the Seismological Society of America 52(4): 895-913.

ANTONOPOULOS, J. "Catalogue of Tsunamis in the Eastern Mediterranean from Antiquity to Present Times." Annals of Geophysics 32(1): 113-130.

Hoff, K. V. (1841). Chronik der Erdbeben und Vulkan-Ausbrüche, mit vorausgehender Abhandlung über die Natur dieser Erscheinungen. Gesch. Ueberlieferung nachgew. natürl. Veränder. Erdoberfläche, Parts 4 and 5, Gotha.

Mallet, R., et al. (1858). The earthquake catalogue of the British Association: with the discussion, curves and maps, etc, Printed by Taylor and Francis.

Ritter, K.W. (1847) "Erdbebenschreithung" vol. 2 p. 339 Breslan

Ancient Texts Thomson, R. W. (2006). History of the Armenians by Moses Khoren, Caravan Books.(iii, 8)

in Armenian

in Russian

in Italian

in French

Stepan ,Acogh 'ig of Daron, in E. Dulaurier's translation of the Armenian text "Acogh 'ig's universal history" Publications de Ecole des Langues Orientates N.iivantes, vol. 18, p. 101-102, Paris 1898.