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This paper focuses on the ionospheric anomalies observed in the F2 layer at Tortosa in Ebre Observatory (40.8oN, 0.49oE), before and after a seismic event in Morocco (Agadir). The data on optimal frequency of F2 layer (f0F2) were acquired using ground based ionosonde. The median-based statistical technique was applied to the data to examine the possible relationship between the earthquake displacement field and the variation of the f0F2 in the ionosphere. The results point to a variation characterized by absence of f0F2 values over four days before the earthquake and continue for almost three days after the day of earthquake. The diurnal monthly median of the f0F2 values also revealed anomalous which has been considered as supporting evidence for the observed correlation.

Ionospheric Anomalies before/after the 1960 Agadir Earthquake