The 20th July 2017 Bodrum–Kos Tsunami Field Survey

Doğan, Gözde Güney; Annunziato, Alessandro; Papadopoulos, Gerassimos A.; Güler, Hasan Gökhan; Yalçıner, Ahmet Cevdet; Cakir, Tarık Eray; Sözdinler, Ceren Özer; Ulutaş, Ergin; Arikawa, Taro; Süzen, Mehmet; Guler, I.; Probst, Pascal; Kânoğlu, Utku; Synolakis, Costas E.

doi:10.1007/s00024-019-02151-1

Cited by 32 publications

(17 citation statements)

References 40 publications

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“…1). The latter event was followed by a damaging tsunami (Dogan et al, 2019;Heidarzadeh et al, 2017;Karasözen et al, 2018). Some unusual observations were reported following the 30 October 2020 tsunami including longlasting tsunami oscillations, which were over a day, and an unusual tsunami run-up height of 3.8 m which are not usually expected from an M w 7.0 normalfaulting earthquake.…”

Section: Introductionmentioning

confidence: 96%

Long Tsunami Oscillations Following the 30 October 2020 Mw 7.0 Aegean Sea Earthquake: Observations and Modelling

Heidarzadeh

Pranantyo

Okuwaki

et al. 2021

Pure Appl. Geophys.

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Eastern Mediterranean Sea has experienced four tsunamigenic earthquakes since 2017, which delivered moderate damage to coastal communities in Turkey and Greece. The most recent of these tsunamis occurred on 30 October 2020 in the Aegean Sea, which was generated by an Mw 7.0 normal-faulting earthquake, offshore Izmir province (Turkey) and Samos Island (Greece). The earthquake was destructive and caused death tolls of 117 and 2 in Turkey and Greece, respectively. The tsunami produced moderate damage and killed one person in Turkey. Due to the semi-enclosed nature of the Aegean Sea basin, any tsunami perturbation in this sea is expected to trigger several basin oscillations. Here, we study the 2020 tsunami through sea level data analysis and numerical simulations with the aim of further understanding tsunami behavior in the Aegean Sea. Analysis of data from available tide gauges showed that the maximum zero-to-crest tsunami amplitude was 5.1–11.9 cm. The arrival times of the maximum tsunami wave were up to 14.9 h after the first tsunami arrivals at each station. The duration of tsunami oscillation was from 19.6 h to > 90 h at various tide gauges. Spectral analysis revealed several peak periods for the tsunami; we identified the tsunami source periods as 14.2–23.3 min. We attributed other peak periods (4.5 min, 5.7 min, 6.9 min, 7.8 min, 9.9 min, 10.2 min and 32.0 min) to non-source phenomena such as basin and sub-basin oscillations. By comparing surveyed run-up and coastal heights with simulated ones, we noticed the north-dipping fault model better reproduces the tsunami observations as compared to the south-dipping fault model. However, we are unable to choose a fault model because the surveyed run-up data are very limited and are sparsely distributed. Additional researches on this event using other types of geophysical data are required to determine the actual fault plane of the earthquake.

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Section: Introductionmentioning

confidence: 96%

Long Tsunami Oscillations Following the 30 October 2020 Mw 7.0 Aegean Sea Earthquake: Observations and Modelling

Heidarzadeh

Pranantyo

Okuwaki

et al. 2021

Pure Appl. Geophys.

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“…The Samos tsunami is arguably the most significant event in the Aegean since the 09 July 1956 Amorgos earthquake and tsunami that produced wave runup values as high as 20 m on the south coast of Amorgos (Okal et al 2009 ). It follows four other smaller events that have impacted the Greek coasts since 2017, namely Lesvos on 12 June 2017, Kos on 20 July 2017 (Heidarzadeh et al 2017 ; Dogan et al 2019 ), Zakynthos on 25 October 2018 (Cirella et al 2020 ; Ganas et al 2020 ), and south Crete on 02 May 2020 (Heidarzadeh and Gusman 2021 ). It is also worth noting that a small tsunami was observed along the north coast of Chios island and Cesme, Turkey, following the 23 July 1949 Chios earthquake (Melis et al 2020 ).…”

Section: Introductionmentioning

confidence: 73%

Field survey of the 30 October 2020 Samos (Aegean Sea) tsunami in the Greek islands

Kalligeris

Skanavis

Charalampakis

et al. 2021

Bull Earthquake Eng

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On October 30th, 2020, a magnitude 7.0 earthquake offshore off the northern coast of Samos, Greece, generated a tsunami that impacted the nearshore Greek islands and the Aegean coastline of Turkey. Here, we describe detailed results from several post-event field surveys, and report first wave arrival timing and polarity information as well as tsunami height/runup measurements, from five islands. In Chios, wave runup reached 1.38 m, in Samos ~ 3 m, in Fourni 1.57 m, in Thimena 1.46 m, and in Ikaria 1.18 m. This event marks two milestones. One, the General Secretariat for Civil Protection of Greece, disseminated a message through Greece's 1–1-2 Emergency Communications Service to all cell phones in the eastern Aegean geographical region, warning recipients to stay away from coastal areas. According to eyewitnesses, the message was received ~ 3–5 min prior to the second and largest flood in Vathi, as the first flood had not sufficiently alarmed the local authorities to evacuate residents. Two, we were able to infer complete tsunami hydrographs from measurements for the first two floods in Vathi, which suggests that the water level rose to about one meter overland flow depth in one minute.

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“…According to field survey, most regions in the Kos coastal zone were negligibly affected by 2017 Bodrum‐Kos tsunami. However, the resonance effect produced an abnormal 1.5 m runup height at the Port of Kos, which caused many motor bikes, cars and even some large size vessels to crash and drift away (Doğan et al., 2019). Similar situations were observed in other regions as well.…”

Section: Tsunami Dynamicsmentioning

confidence: 99%

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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The 20th July 2017 Bodrum–Kos Tsunami Field Survey

Cited by 32 publications

References 40 publications

Long Tsunami Oscillations Following the 30 October 2020 Mw 7.0 Aegean Sea Earthquake: Observations and Modelling

Long Tsunami Oscillations Following the 30 October 2020 Mw 7.0 Aegean Sea Earthquake: Observations and Modelling

Field survey of the 30 October 2020 Samos (Aegean Sea) tsunami in the Greek islands

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

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