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Schlagwörter:
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Zusammenfassung:
On February 6th 2023 a magnitude 7.9 earthquake occurred along the east Anatolian fault on the border between Turkey and Syria. The event, that was followed by a long sequence of moderate to large aftershocks, caused thousand of deaths and widespread infrastructural damage.
Despite the mechanism being mainly strike-slip, a small tsunami was still observed along the coasts of Turkey and measured by few sea level stations.
In this work we analyze the tsunami generation and propagation through both analysis of tide gauge records and numerical simulations. The signal analysis is carried out with data driven techniques such as Iterative Filtering and the IMFogram, which are particularly suitable for non-linear and non-stationary signals time series.
Through the use of numerical simulations we investigate the role of the slip distribution on the fault in generating the initial water surface displacement. Comparisons are made with another strike-slip M=7.5 earthquake that happened about 9 hours later on the same day and in the same source area without generating tsunami.
The findings can be useful to improve tsunami hazard assessment, warning and real-time forecasting especially in the case of large magnitude strike-slip earthquakes in the eastern Mediterranean.
