Time-clustering behavior in the sequence of the aftershocks of the Al-Hoceima (Morocco) 24 February 2004 earthquake
- 1Istituto di Metodologie per l'Analisi Ambientale, CNR, Tito Scalo (PZ), Italy
- 2Laboratory of Enginnering Geology, Faculty of Sciences, Meknes Universiy, P.O. Box 11201, Zitoune, Meknes, Morocco
- 3Institut Scientifique, Mohamed V – Agdal University, Rabat, Morocco
Abstract. The time dynamics of the aftershock sequence of the Al-Hoceima (Morocco) earthquake of 24 February 2004 has been investigated. The sequence of the occurrence times of the events with threshold magnitude Mth≥3.2 is characterized by a time-clustering behavior, identified using different fractal methods (Fano Factor, Allan Factor, Count-based Periodogram), well suited to reveal scaling features in point processes. The obtained results not only show the presence of memory phenomena and correlation structures in the Al-Hoceima aftershocks, but also furnish quantitatively the estimate of the magnitude of such correlation by means of the estimate of the scaling exponent α.