TY - JOUR
T1 - Long Tsunami Oscillations Following the 30 October 2020 Mw 7.0 Aegean Sea Earthquake
T2 - Observations and Modelling
AU - Heidarzadeh, Mohammad
AU - Pranantyo, Ignatius Ryan
AU - Okuwaki, Ryo
AU - Dogan, Gozde Guney
AU - Yalciner, Ahmet C.
N1 - Funding Information:
We used the GMT software for drafting some of the figures (Wessel and Smith, ). Software ObsPy (Beyreuther et al., ), Pyrocko (Heimann et al., ), and matplotlib (Hunter, ) were used to generate some of the figures. The facilities of IRIS Data Services, and specifically the IRIS Data Management Center, were used for access to waveforms, related metadata, and/or derived products used in this study. IRIS Data Services are funded through the Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation under Cooperative Support Agreement EAR‐1851048. Earthquake source models used in this study are archived at Github repository (Okuwaki, ). We are sincerely grateful to Prof Alexander Rabinovich (the Editor-in-Chief) for commenting on the manuscript before submission. This research is funded by the Royal Society (the United Kingdom) grant number CHL\R1\180173. The authors GGD and ACY acknowledge Yuksel Proje International Co. for significant and invaluable support for the researches related to the 30 October 2020 tsunami and similar events.
Funding Information:
We used the GMT software for drafting some of the figures (Wessel and Smith, 1998). Software ObsPy (Beyreuther et al., 2010), Pyrocko (Heimann et al., 2017), and matplotlib (Hunter, 2007) were used to generate some of the figures. The facilities of IRIS Data Services, and specifically the IRIS Data Management Center, were used for access to waveforms, related metadata, and/or derived products used in this study. IRIS Data Services are funded through the Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation under Cooperative Support Agreement EAR?1851048. Earthquake source models used in this study are archived at Github repository (Okuwaki, 2020). We are sincerely grateful to Prof Alexander Rabinovich (the Editor-in-Chief) for commenting on the manuscript before submission. This research is funded by the Royal Society (the United Kingdom) grant number CHL\R1\180173. The authors GGD and ACY acknowledge Yuksel Proje International Co. for significant and invaluable support for the researches related to the 30 October 2020 tsunami and similar events.
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/5
Y1 - 2021/5
N2 - 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.
AB - 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.
KW - Aegean Sea
KW - earthquake
KW - Greece
KW - Izmir
KW - numerical simulations
KW - Samos
KW - spectral analysis
KW - Tsunami
KW - Turkey
UR - http://www.scopus.com/inward/record.url?scp=85106469350&partnerID=8YFLogxK
U2 - 10.1007/s00024-021-02761-8
DO - 10.1007/s00024-021-02761-8
M3 - Article
AN - SCOPUS:85106469350
SN - 0033-4553
VL - 178
SP - 1531
EP - 1548
JO - Pure and Applied Geophysics
JF - Pure and Applied Geophysics
IS - 5
ER -