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The Mw = 6.6 earthquake and tsunami of south Crete on 2020 May 2

Kalligeris Nikos, Skanavis Vassilios, Melis Nikolaos S., Okal Emile, Dimitroulia Angeliki, Charalampakis Marinos, Lynett Patrick, Synolakis Kostas

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URIhttp://purl.tuc.gr/dl/dias/4FCE488B-2248-4B5F-8A97-0E5B4BECE728-
Identifierhttps://doi.org/10.1093/gji/ggac052-
Identifierhttps://academic.oup.com/gji/article/230/1/480/6524844-
Languageen-
Extent27 pagesen
TitleThe Mw = 6.6 earthquake and tsunami of south Crete on 2020 May 2en
CreatorKalligeris Nikosen
CreatorΚαλλιγερης Νικοςel
CreatorSkanavis Vassiliosen
CreatorMelis Nikolaos S.en
CreatorOkal Emileen
CreatorDimitroulia Angelikien
CreatorΔημητρουλια Αγγελικηel
CreatorCharalampakis Marinosen
CreatorLynett Patricken
CreatorSynolakis Kostasen
CreatorΣυνολακης Κωσταςel
PublisherOxford University Pressen
Content SummaryOn 2020 May 2, an Mw = 6.6 earthquake struck about 63 km south of Ierapetra in Crete, Greece. The earthquake generated a small tsunami which agitated local harbours. We studied this event in the context of earthquakes with seismic records in 1908, 1910, 1923, 1952, 2009 and 2013, all of similar magnitudes located south of Crete. Based on an energy-to-moment ratio, our analysis suggests that this event was neither slow nor fast, hence appropriate for using scaling laws to infer seafloor deformations. We also performed a field survey, three days after the event and present field observations from seven locations, including the island of Chrisi, where our highest measurement of 0.95 m was located. Runup along the coast of southern Crete ranged from 0.24 to 0.87 m. One tide gauge record is available for this event, and we did image analysis to obtain accurately timed water surface elevations from eyewitness videos and images. We undertook high-resolution hydrodynamic simulations using published moment tensor solutions to identify the source of the tsunami. Simulations were performed with two models, MOST (a nonlinear shallow water model) and COULWAVE (a Boussinesq-type model), to infer how different approximations of the parent equations of motion affect predictions for tsunamis of this size, which are fairly common in the Eastern Mediterranean and routinely trigger Tsunami Service Providers to issue warning messages. Based on the inter-model comparison, we conclude that the shallow-water equations are adequate in modelling this event at the distances considered, suggesting that such codes can be used to infer the tsunami source and to estimate tsunami impacts. Last, our field work revealed lack of knowledge of tsunami hazards, as most eyewitnesses remained near the waterfront, filming the associated unusual water motions instead of taking shelter on high ground.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2024-02-29-
Date of Publication2022-
SubjectTsunamisen
SubjectEuropeen
SubjectImage processingen
SubjectNumerical modellingen
SubjectEarthquake source observationsen
Bibliographic CitationN. Kalligeris, V. Skanavis, N. S. Melis, E. A. Okal, A. Dimitroulia, M. Charalampakis, P. J. Lynett, and C. E. Synolakis, “The Mw = 6.6 earthquake and tsunami of south Crete on 2020 May 2,” Geophys. J. Int., vol. 230, no. 1, pp. 480–506, July 2022, doi: 10.1093/gji/ggac052. en

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