Quantitative risk assessment in El-Jadida (Northern Atlantic Coast of Morocco) for a tsunami scenario equivalent to that of the 1755 Lisbon earthquake

Abstract

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The Tsunami Generated by the Gorringe Bank Fault: Analyzing Wave Heights and Travel Time in the Atlantic Coast of Morocco

“…In Casablanca the MXH calculated is 5.5 m which is smaller than the value of 10 m found by [13]. This difference is probably related to the GB fault parameters used in [13] which correspond to those in the work of [1], whereas in our study we used the new GBF fault parameters used in [8]. Concerning Rabat, the MWH recorded is almost 1 m less than the value recorded in Casablanca.…”

“…Furthermore, the magnitude obtainned for the invistigated scenario is about 8.5, which is smaller than the magnetudes calculated in [14] (8.75 -9) as well as those calculated by [15], [1] and [16]. However, recent estimates of the magnitude of the 1755 event have a range of 7.2 -8.2, which is more similar to the results obtained by [13]. However, our belief is that the difference will not be significant enough to radically alter the results for future tsunami risks in Morocco.…”

“…In El-Jadida, which is the first site to be reached by the tsunami in almost 60 minutes, the simulation that the tsunami waves could reach the nearshore areas with the MWH of about 5 m. This value is significantly smaller than 5.5 m that is a value found by [8] for the same scenario, this difference is due to the highresolution digital elevation model used in their study. In Casablanca the MXH calculated is 5.5 m which is smaller than the value of 10 m found by [13]. This difference is probably related to the GB fault parameters used in [13] which correspond to those in the work of [1], whereas in our study we used the new GBF fault parameters used in [8].…”

Evaluation of Tsunami Inundation in the Plain of Martil (North Morocco): Comparison of Four Inundation Estimation Methods

“…Furthermore, extreme events scenarios have not been investigated for the north of Morocco. Only the famous 1755 event, supposedly being the most destructive one in the Atlantic region, has been extensively studied (Amine et al, 2018a;Baptista et al, 2003;El Moussaoui et al, 2017;Omira et al, 2012;Ramalho et al, 2018;Tadibaght et al, 2022a). Overall, the 1755 Atlantic case prevalence and the lack of research on submarine landslide tsunamis are two reasons that justify the significant need to fill knowledge gaps on the exposure of the northern coast of Morocco to tsunami.…”

Perception and Knowledge of Disaster Risks and Preparedness: The Case of the City of Mohammedia, Morocco

“…Knowing that one of the disasters that threatens the city is mainly flooding, especially since the city is surrounded by two rivers, for example, the river Oued El Maleh, which causes floods that cause significant losses; what increases the risk is its impact on the largest petroleum region in Morocco, as was witnessed in 2002 [3]. Another significant risk is that the city's coast is vulnerable to tsunamis, as studies have confirmed that the city has already been hit by a tsunami in previous centuries, reaching a height of 8 meters [4].…”