Kinematics of the 30 October 2020 Mw 7.0 Néon Karlovásion (Samos) earthquake in the Eastern Aegean Sea: Implications on source characteristics and dynamic rupture simulations

Taymaz, Tuncay; Yolsal‐Çevikbilen, Seda; Irmak, Tahir Serkan; Vera, Felipe; Liu, Chengli; Eken, Tuna; Zhang, Zhenguo; Erman, Ceyhun; Keleş, Derya

doi:10.1016/j.tecto.2022.229223

Cited by 21 publications

(14 citation statements)

References 122 publications

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“…However, several distant stations are located on Greek Islands within this azimuthal range in our database and they result in larger residuals which represent the higher amplitudes than their predicted values. This inference corroborates the statement of "the possibility of a predominantly westward with less eastward directivity" highlighted by Ganas et al, 2021, Kiratzi, et al, 2021and Taymaz et al, 2022.…”

Section: Evaluation Of Source Directivity and Azimuthal Impactssupporting

confidence: 89%

“…This fault movement caused uplift of Samos Island on the footwall side of the fault and subsidence on the hanging wall side, hence why the Greek Islands to the North of the epicentre saw higher tsunami run-up levels (Aktas et al, 2021). Considerable research efforts have also been dedicated to the identification of the finite fault models, many of which are compatible with each other for the mainshock (Kiratzi et al, 2021 (see Supplementary Table S1); Akinci et al, 2021;Karakostas et al, 2021;Chousianitis and Konca, 2021;Ganas et al, 2021;Taymaz et al, 2022). Kiratzi et al (2021) has established a mainshock slip model with thirty recordings chosen to represent all azimuth angles based on a finite fault inversion method.…”

Section: Brief Seismological Information Of the Eventmentioning

confidence: 99%

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Characteristics of Strong Ground Motions in the 30 October 2020, MW6.9 Aegean Sea Earthquake

Malcıoğlu

O’Kane

Dönmez

et al. 2022

Front. Built Environ.

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The eastern parts of the Aegean Sea were struck by a destructive MW 6.9 earthquake on 30 October 2020 at 11:51:27 UTC. The earthquake ruptured an East-West trending normal fault in the Aegean Sea between the northern coast of Samos Island and the southern coast of İzmir and also triggered a medium level tsunami and thousands of aftershocks across the region. 119 fatalities, 1,051 injuries, and many collapsed buildings were reported due to the earthquake in the affected region. The most catastrophic consequences of the earthquake were registered in the Bayraklı and Bornova districts, which are built on a deep alluvial Basin approximately 60–70 km away from the epicentre of the mainshock. This paper explains the damage with an extensive dataset of ground motion records of the mainshock and aftershocks, which are provided by both Greek and Turkish networks. A set of ground motion parameters such as peak ordinates, spectral quantities, intensity measures and duration parameters are calculated and analysed. The closest softer soil station in Samos Island produces the highest peak ground acceleration and velocity. The ground motion models employed commonly for the region overestimate the observed data beyond 60–70 km of Joyner-Boore distance except for the recently published local ground motion model, which utilises local earthquakes in the derivation of the model. Contrary to expectations, stiff soil recordings exhibit considerable spectral accelerations in the long period region, similar to those in soft soils. The calculated ground motion parameters are correlated with the results of the hybrid reconnaissance mission, organized by the Earthquake Engineering Field Investigation Team (EEFIT). Although the peak values and regarded intensity measures clearly highlight the variability in soil conditions in the most damaged area (Bayraklı and Bornova), velocity-based ground motion parameters seem to be the more responsive damage indicators. The spectral shapes of the normalised response spectra in the İzmir Basin are not compatible with the 2018 Turkish seismic code spectrum whereas their response spectra are below the 475-years return period design spectra provided in outdated and current Turkish seismic codes.

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Section: Evaluation Of Source Directivity and Azimuthal Impactssupporting

confidence: 89%

Section: Brief Seismological Information Of the Eventmentioning

confidence: 99%

Characteristics of Strong Ground Motions in the 30 October 2020, MW6.9 Aegean Sea Earthquake

Malcıoğlu

O’Kane

Dönmez

et al. 2022

Front. Built Environ.

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“…On the other hand, the dipping direction remains unresolved from this method, which could be due to the similar dip angles of the two nodal planes as suggested in He and Ni (2017). With the constraint from near-field strong motion, Taymaz et al (2022) suggested a north-dipping model with updip and westward propagation of the bilateral rupture pattern could best fit teleseismic waveforms and well explain the aftershock distributions.…”

Section: Aftershock Distribution and Source Geometriesmentioning

confidence: 88%

“…With the constraint from near‐field strong motion, Taymaz et al. (2022) suggested a north‐dipping model with updip and westward propagation of the bilateral rupture pattern could best fit teleseismic waveforms and well explain the aftershock distributions.…”

Section: Aftershock Distribution and Source Geometriesmentioning

confidence: 99%

“…A north‐dipping extensional normal fault with an almost east‐west strike was proposed for the mainshock by Ganas et al. (2020), while both south‐ and north‐dipping fault models were proposed in previous studies (Bulut et al., 2021; Chousianitis & Konca, 2021; Ganas et al., 2021; Heidarzadeh et al., 2021; Sakkas, 2021; Taymaz et al., 2022). The Samos earthquake was followed by a powerful tsunami at the surrounding coasts, especially in the northern Samos Island, Greece, and southern coast of Izmir, Turkey and 1,800 ( M L > 2) aftershocks during the first post‐earthquake month (Chousianitis & Konca, 2021).…”

Section: Introductionmentioning

confidence: 97%

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Source Characteristics and Exacerbated Tsunami Hazard of the 2020 Mw 6.9 Samos Earthquake in Eastern Aegean Sea

et al. 2022

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On 30 October 2020, 11:51 UTC (13:51 local time), a strong and shallow earthquake of Mw 6.9 occurred off the northern coast of Samos Island, the eastern Aegean Sea, close to the Izmir region of Turkey (Figure 1). The focal mechanism of the Samos earthquake, provided by both teleseismic and geodetic information, is as yet ambiguous due to the lack of near-field observation near the epicenter. A north-dipping extensional normal fault with an almost east-west strike was proposed for the mainshock by , while both south-and north-dipping fault models were proposed in previous studies (

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3-D shallow crustal structure and offshore geothermal potential of the Aegean region of Türkiye from ambient noise tomography

Mulumulu,

Polat,

Chávez‑García

2025

Journal of Asian Earth Sciences

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Kinematics of the 30 October 2020 Mw 7.0 Néon Karlovásion (Samos) earthquake in the Eastern Aegean Sea: Implications on source characteristics and dynamic rupture simulations

Cited by 21 publications

References 122 publications

Characteristics of Strong Ground Motions in the 30 October 2020, MW6.9 Aegean Sea Earthquake

Characteristics of Strong Ground Motions in the 30 October 2020, MW6.9 Aegean Sea Earthquake

Source Characteristics and Exacerbated Tsunami Hazard of the 2020 Mw 6.9 Samos Earthquake in Eastern Aegean Sea

3-D shallow crustal structure and offshore geothermal potential of the Aegean region of Türkiye from ambient noise tomography

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