Local date | 21 July 365 |
---|---|
Local time | Sunrise |
Magnitude | 8.5+[1] |
Epicenter | 35°00′N23°00′E / 35.0°N 23.0°ECoordinates: 35°00′N23°00′E / 35.0°N 23.0°E[2] |
Areas affected | Greece, Crete |
Max. intensity | XI (Extreme)[2] |
Tsunami | Yes |
Casualties | 'many thousands'[2][3] |
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The 365 Crete earthquake occurred at about sunrise on 21 July 365 in the Eastern Mediterranean,[4][5] with an assumed epicentre near Crete.[6] Geologists today estimate the undersea earthquake to have been a magnitude 8.0 or higher.[5] It caused widespread destruction in central and southern Greece, northern Libya, Egypt, Cyprus, Sicily,[7] and Spain.[8] On Crete, nearly all towns were destroyed.[5]
The Crete earthquake was followed by a tsunami which devastated the southern and eastern coasts of the Mediterranean, particularly Libya, Alexandria and the Nile Delta, killing thousands and hurling ships 3 km (1.9 mi) inland.[3] The quake left a deep impression on the late antique mind, and numerous writers of the time referred to the event in their works.[9]
Geological evidence[edit]
Recent (2001) geological studies view the 365 Crete earthquake in connection with a clustering of major seismic activity in the Eastern Mediterranean between the fourth and sixth centuries which may have reflected a reactivation of all major plate boundaries in the region.[5] The earthquake is thought to be responsible for an uplift of nine metres (30 feet) of the island of Crete, which is estimated to correspond to a seismic moment of 1×1022N⋅m (7.4×1021lbf⋅ft), or 8.6 on the moment magnitude scale. An earthquake of such a size exceeds all modern ones known to have affected the region.[5]
Carbon dating shows that corals on the coast of Crete were lifted ten metres (33 feet) and clear of the water in one massive push. This indicates that the tsunami of 365 was generated by an earthquake in a steep fault in the Hellenic Trench near Crete. Scientists estimate that such a large uplift is only likely to occur once in 5,000 years; however, the other segments of the fault could slip on a similar scale—and this could happen every 800 years or so. It is uncertain whether 'one of the contiguous patches might slip in the future.'[10][11]
Literary evidence[edit]
Historians continue to debate the question whether ancient sources refer to a single catastrophic earthquake in 365, or whether they represent an historical amalgamation of a number of earthquakes occurring between 350 and 450.[12] The interpretation of the surviving literary evidence is complicated by the tendency of late antique writers to describe natural disasters as divine responses or warnings to political and religious events.[13] In particular, the virulent antagonism between rising Christianity and paganism at the time led contemporary writers to distort the evidence. Thus, the SophistLibanius and the church historian Sozomenus appear to conflate the great earthquake of 365 with other lesser ones to present it as either divine sorrow or wrath—depending on their viewpoint—for the death of Emperor Julian, who had tried to restore the pagan religion two years earlier.[14]
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On the whole, however, the relatively numerous references to earthquakes in a time which is otherwise characterized by a paucity of historical records strengthens the case for a period of heightened seismic activity.[15]Kourion on Cyprus, for example, is known to have been hit then by five strong earthquakes within a period of eighty years, leading to its permanent destruction.[16]
Archeology[edit]
Archeological evidence for the particularly devastating effect of the 365 earthquake is provided by a survey of excavations which document the destruction of most late antiquity towns and cities in the Eastern and Southern Mediterranean around 365.[7]
Tsunami[edit]
The Roman historian Ammianus Marcellinus described in detail the tsunami that hit Alexandria and other places in the early hours of 21 July 365.[3] His account is particularly noteworthy for clearly distinguishing the three main phases of a tsunami, namely an initial earthquake, the sudden retreat of the sea and an ensuing gigantic wave rolling inland:
Slightly after daybreak, and heralded by a thick succession of fiercely shaken thunderbolts, the solidity of the whole earth was made to shake and shudder, and the sea was driven away, its waves were rolled back, and it disappeared, so that the abyss of the depths was uncovered and many-shaped varieties of sea-creatures were seen stuck in the slime; the great wastes of those valleys and mountains, which the very creation had dismissed beneath the vast whirlpools, at that moment, as it was given to be believed, looked up at the sun's rays. Many ships, then, were stranded as if on dry land, and people wandered at will about the paltry remains of the waters to collect fish and the like in their hands; then the roaring sea as if insulted by its repulse rises back in turn, and through the teeming shoals dashed itself violently on islands and extensive tracts of the mainland, and flattened innumerable buildings in towns or wherever they were found. Thus in the raging conflict of the elements, the face of the earth was changed to reveal wondrous sights. For the mass of waters returning when least expected killed many thousands by drowning, and with the tides whipped up to a height as they rushed back, some ships, after the anger of the watery element had grown old, were seen to have sunk, and the bodies of people killed in shipwrecks lay there, faces up or down. Other huge ships, thrust out by the mad blasts, perched on the roofs of houses, as happened at Alexandria, and others were hurled nearly two miles from the shore, like the Laconian vessel near the town of Methone which I saw when I passed by, yawning apart from long decay.[17]
The tsunami in 365 was so devastating that the anniversary of the disaster was still commemorated annually at the end of the sixth century in Alexandria as a 'day of horror'.[18][19]
Gallery[edit]
Effects of the earthquake visible in the ancient remains:
Microsoft Dynamics 365 Ce
Raised beach 2 km west of Paleochora showing wave-cut notch and sea caves uplifted by about 9 m during the earthquake
Sea advanced close to the baths at Sabratha
Submerged harbors at Apollonia
The no-longer-submerged harbor in Phalasarna
See also[edit]
Footnotes[edit]
- ^Stiros, S. C. (2010). 'The 8.5+ magnitude, AD365 earthquake in Crete: Coastal uplift, topography changes, archaeological and historical signature'. Quaternary International. 216 (1–2): 54–63. Bibcode:2010QuInt.216...54S. doi:10.1016/j.quaint.2009.05.005.
- ^ abcNGDC. 'Comments for the Significant Earthquake'. Retrieved 21 May 2011.
- ^ abcAmmianus Marcellinus, 'Res Gestae', 26.10.15–19
- ^Today in Earthquake HistoryArchived 2007-03-25 at the Wayback Machine
- ^ abcdeStiros 2001, p. 545
- ^Stiros 2001, p. 546, fig. 1
- ^ abStiros 2001, pp. 558–560, app. B
- ^Moreno, M. E., Los estudios de sismicidad histórica en Andalucía: Los terremotos históricos de la Provincia de Almería(PDF), Instituto Andaluz de Geofísica y Prevención de Desastres Sísmicos, pp. 124–126
- ^For summaries of the sources, see: Stiros 2001, pp. 557f., app. A
- ^Jeff Hecht (15 March 2008). 'Mediterranean's 'horror' tsunami may strike again'. New Scientist. 197 (2647): 16. doi:10.1016/S0262-4079(08)60641-7.
- ^Shaw, B.; Ambraseys, N.N.; England, P.C.; Floyd, M.A.; Gorman, G.J.; Higham, T.F.G.; Jackson, J.A.; Nocquet, J.-M.; Pain, C.C.; Piggott, M.D. (2008). 'Eastern Mediterranean tectonics and tsunami hazard inferred from the AD 365 earthquake'(PDF). Nature Geoscience. 1 (4): 268–276. Bibcode:2008NatGe...1..268S. doi:10.1038/ngeo151. Archived from the original(PDF) on 4 March 2016. Retrieved 20 May 2011.
- ^Stiros 2001, pp. 545f.
- ^Kelly 2004, p. 145
- ^Stiros 2001, pp. 547 & 557f.
- ^Stiros 2001, p. 553
- ^Soren, D. (1988). 'The Day the World Ended at Kourion. Reconstructing an Ancient Earthquake'. National Geographic. 174 (1): 30–53.
- ^Kelly 2004, p. 141
- ^Stiros 2001, pp. 549, 557
- ^Hecht, Jeff (March 10, 2008). 'Mediterranean's 'horror' tsunami may strike again'. New Scientist.
References[edit]
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- Kelly, Gavin (2004), 'Ammianus and the Great Tsunami'(PDF), The Journal of Roman Studies, 94: 141–167, doi:10.2307/4135013, hdl:20.500.11820/635a4807-14c9-4044-9caa-8f8e3005cb24, JSTOR4135013
- Stiros, Stathis C. (2001), 'The AD 365 Crete Earthquake and Possible Seismic Clustering During the Fourth to Sixth Centuries AD in the Eastern Mediterranean: A Review of Historical and Archaeological Data', Journal of Structural Geology, 23 (2–3): 545–562, Bibcode:2001JSG....23..545S, doi:10.1016/S0191-8141(00)00118-8
Further reading[edit]
Literary discussion on sources and providentialist tendencies
- G. J. Baudy, 'Die Wiederkehr des Typhon. Katastrophen-Topoi in nachjulianischer Rhetorik und Annalistik: zu literarischen Reflexen des 21 Juli 365 n.C.', JAC 35 (1992), 47–82
- M. Henry, 'Le temoignage de Libanius et les phenomenes sismiques de IVe siecle de notre ere. Essai d'interpretation', Phoenix 39 (1985), 36–61
- F. Jacques and B. Bousquet, “Le raz de maree du 21 juillet 365“, Mélanges de l'École française de Rome, Antiquité (MEFRA), Vol. 96, No.1 (1984), 423–61
- C. Lepelley, 'Le presage du nouveau desastre de Cannes: la signification du raz de maree du 21 juillet 365 dans l'imaginaire d' Ammien Marcellin', Kokalos, 36–37 (1990–91) [1994], 359–74
- M. Mazza, 'Cataclismi e calamitä naturali: la documentazione letteraria', Kokalos 36–37 (1990–91) [1994], 307–30
Geological discussion
365 Ce Year
- Bibliography in: E. Guidoboni (with A. Comastri and G. Traina, trans. B. Phillips), Catalogue of Ancient Earthquakes in the Mediterranean Area up to the 10th Century (1994)
- D. Kelletat, 'Geologische Belege katastrophaler Erdkrustenbewegungen 365 AD im Raum von Kreta', in E. Olhausen and H. Sonnabend (eds), Naturkatastrophen in der antiken Welt: Stuttgarter Kolloquium zur historischen Geographie des Altertums 6, 1996 (1998), 156–61
- P. Pirazzoli, J. Laborel, S. Stiros, 'Earthquake clustering in the Eastern Mediterranean during historical times', Journal of Geophysical Research, Vol. 101 (1996), 6083–6097
- S. Price, T. Higham, L. Nixon, J. Moody, 'Relative sea-level changes in Crete: reassessment of radiocarbon dates from Sphakia and West Crete', BSA 97 (2002), 171–200
- G. Waldherr, 'Die Geburt der 'kosmischen Katastrophe'. Das seismische Großereignis am 21. Juli 365 n. Chr.', Orbis Terrarum 3 (1997), 169–201
- Stathis C. Stiros; Was Alexandria (Egypt) Destroyed in A.D. 365? A Famous Historical Tsunami Revisited. Seismological Research Letters ; 91 (5): 2662–2673. doi: https://doi.org/10.1785/0220200045
External links[edit]
Ce 365 Login
- Ancient Mediterranean Tsunami May Strike Again – National Geographic
- The 365 A.D. Tsunami Destruction of Alexandria, Egypt: Erosion, Deformation of Strata and Introduction of Allochthonous Material – Geological Society of America
- Ancient city by the sea rises amid Egypt's resorts – Associated Press
- The tsunami of 365 – Livius.org
- Earthquake and tsunami of July 21, 365 AD in the eastern Mediterranean Sea – George Pararas-Carayannis