Medina, F. and El Alami, S.O. (2006) Focal Mechanisms and State of Stress in the Al Hoceima Area. Bulletin de l’Institut Scientifique, Section Sciences de la Terre, 28, 19-30.

has been cited by the following article:

• TITLE: Coulomb Stress Perturbations Related to the Al Hoceima (Morocco) Earthquakes of 1994 and 2004

  AUTHORS: Fida Medina

  KEYWORDS: Morocco, Seismicity, Al Hoceima, Coulomb Stress Change, Seismotectonics, Seismic Hazard

  JOURNAL NAME: Open Journal of Earthquake Research, Vol.4 No.1, February 26, 2015

  ABSTRACT: This paper exposes the results of the study of the stress perturbations caused by the Al Hoceima (Morocco) earthquakes of 1994 and 2004 by means of Coulomb modeling. Modeling was based on the compilation of all the studies carried out after both events, including seismological (location and depth of the main shocks and aftershocks), seismotectonic (source parameters, stress field), geodetic (GPS), tomographic and geological ones. It shows that the first earthquake is likely to have induced the second one when adopting appropriate epicenter locations, source and receiver fault planes. In detail, the model shows that motion along the N23E oriented Bousekkour-Aghbal fault in 1994 activated the eastern segment of a previously unknown NW-SE fault located at its southern end, which in turn originated the 2004 earthquake. The model also provides a suitable explanation for the distribution of the aftershock clusters. Finally, an attempt of prediction of the next event shows that it is likely to occur on NE-SW planes located to the NW (Bokkoya and offshore) and SE (reaching the Nekor fault) of the NW-SE fault, while Al Hoceima city should remain in a shadow zone.