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

Kalligeris, Nikos; Skanavis, Vassilios; Charalampakis, Marinos; Melis, Νikolaos S.; Voukouvalas, Evangelos; Annunziato, Alessandro; Synolakis, Costas E.

doi:10.1007/s10518-021-01250-6

Cited by 17 publications

(6 citation statements)

References 35 publications

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“…The number 1 in Figure 6 denotes the points corresponding to the tsunami on 30 October 2020 in Turkey (M w 7.0). The consequences of this event have been investigated by several expeditions [68][69][70]. There are 272 records of recorded tsunami runups in the GHTD database.…”

Section: Results Of Operation Of the "Tsunami Observer" Systemmentioning

confidence: 99%

Automatic Tsunami Hazard Assessment System: “Tsunami Observer”

et al. 2022

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The current prototype of a fully automatic earthquake tsunami hazard assessment system, “Tsunami Observer”, is described. The transition of the system to the active phase of operation occurs when information about a strong earthquake (Mw ≥ 6.0) is received. In the first stage, the vector field of coseismic displacements of the Earth’s crust is calculated by using the Okada formulas. In the calculations, use is made of data on the coordinates, the seismic moment, the focal mechanism, and the depth of the earthquake, as well as empirical patterns. In the second stage, the initial elevation of the water surface at the tsunami’s focus is determined with the vector field of coseismic displacements of the bottom and the distribution of ocean depths, and the earthquake’s potential energy is calculated. In the third stage, the intensity of the tsunami is estimated on the Soloviev–Imamura scale in accordance with the magnitude of the potential energy by using the empirical relationship that is obtained as a result of a statistical analysis of historical tsunami events. In the final stage, if the energy exceeds the critical value of 109 J, a numerical simulation of the tsunami is performed, which allows the determination of the predominant directions of wave energy propagation and estimation of the runup height on the nearest coast. In this work, data on the operation of the system over the last 3 years are presented.

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Section: Results Of Operation Of the "Tsunami Observer" Systemmentioning

confidence: 99%

Automatic Tsunami Hazard Assessment System: “Tsunami Observer”

et al. 2022

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“…Some of them have already been studied in specific papers (Table 1, Figure 1), and, therefore, our compilation did not include those tsunamis. [20][21][22] Figure 1. Map of epicenters (black circles) and moment magnitudes of the tsunamigenic earthquakes listed in Table 1.…”

Section: Introductionmentioning

confidence: 99%

New Observational Material about Seismic and Non-Seismic Tsunamis in Greece and Surrounding Areas from 1900 to 2023

Triantafyllou,

Papadopoulos

2024

GeoHazards

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A new set of observations has been compiled for tsunamis occurring in Greece and in the surrounding areas from 1900 to 2023. A variety of information sources has been collected and examined, including scientific and press reports, books, eyewitness accounts, pictorial and video material, and tide-gauge records. New material was also collected during our field surveys in the islands of Cephalonia, Karpathos, and Kos. Our investigation included 26 distinct events and revealed several tsunamis. The majority of them have remained unknown so far in the tsunami community. Our compilation also included little-known events for which further documentation has been provided. Among others, of particular importance is the collection of new information about the well-known tsunami associated with the 9 February 1948 large earthquake in Karpathos Island as well as the unknown so far series of local but powerful tsunamis generated during the seismic crisis of very strong earthquakes that destroyed the Ionian islands during August 1953. The new observational material collected is significant for the enrichment of existing tsunami catalogs with positive implications for better understanding the tsunami generation mechanisms and the assessment of tsunami hazards and risks.

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“…Earthquakes (EQs) are perceived as sudden, violent tremors of the Earth's surface, which, depending on the hypocenter location and the magnitude, can have multiple devastating consequences to the society and economy, such as material damages (to infrastructures, company losses, personal properties, etc.) and injuries or even loss of lives, [e.g., Yuan, 2008;Kazama and Noda, 2012;Kalligeris et al 2022;Dolu and İkizler, 2022;Naddaf, 2023;Nature Editorial, 2023]. Due to their potentially catastrophic consequences, EQs attract the interest of the society and scientists, as it happens for all natural disasters, e.g., [Keller and DeVecchio 2019].…”

Section: Introductionmentioning

confidence: 99%

ELSEM-Net, a network of ground-based telemetric stations for the monitoring of fracture-induced electromagnetic emissions in Greece: Instrumentation, management and analysis of recent observations associated with strong earthquakes

Malkotsis,

Papadopoulos,

Politis

et al. 2023

Annals of Geophysics

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The hELlenic Seismo-ElectroMagnetics Network (ELSEM-Net, http://elsem-net.uniwa.gr) is a network of telemetric stations spanning all over Greece for the monitoring of fracture-induced electromagnetic emissions (FEME), often also referred to as electromagnetic radiation (FEMR). At the laboratory scale, it has been proved that FEME/FEMR are produced by opening cracks in a wide frequency spectrum ranging from the MHz to the kHz bands as the general (macroscopic) fracture is approaching, rendering them precursors of general fracture that permit the monitoring of the gradual damage of stressed materials. FEME/FEMR is also observed at the geophysical scale, preceding strong earthquakes (EQs) with epicenters on land or near the coast-line. Based on the idea that MHz-kHz FEME/FEMR should also permit the monitoring of the gradual damage of stressed materials in the Earth’s crust, as it happens in the laboratory experiments, ELSEM-Net was gradually developed from 1992 to 1998 and currently comprises 11 stations installed in various locations in Greece. Here we present the instrumentation that has been specifically designed for ELSEM-Net, both hardware and firmware/software, as well as a web-based system for the management of the field stations, the recorded data, and the automated preliminary analysis results. Finally, we present the analysis of selected observations associated with recent strong earthquakes that hit Greece, using a most recently introduced time series analysis method. Our presentation aims to communicate in detail the experimental infrastructure behind our almost 30 years of research in geophysical scale FEME/FEMR so that other interested research groups around the world can take advantage of it and have the opportunity to install similar stations/networks in other locations of the world for the study of pre-EQ processes associated with natural or man-induced seismicity.

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

Cited by 17 publications

References 35 publications

Automatic Tsunami Hazard Assessment System: “Tsunami Observer”

Automatic Tsunami Hazard Assessment System: “Tsunami Observer”

New Observational Material about Seismic and Non-Seismic Tsunamis in Greece and Surrounding Areas from 1900 to 2023

ELSEM-Net, a network of ground-based telemetric stations for the monitoring of fracture-induced electromagnetic emissions in Greece: Instrumentation, management and analysis of recent observations associated with strong earthquakes

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