Researchers at the University of Granada have characterized the physical and mechanical properties of the crust in regionm grenadine, which presents an intense seismic activity. The work has linked the temperature of the crust with seismic activity, determining that in areas with higher temperatures there is a much lower probability of occurrence of earthquakes.
Researchers at the Andalusian Institute of Earth Sciences (CSIC) and the Department of Geodynamics at the University of Granada (UGR) have characterized for the first time the physical and mechanical properties of the crust (in its most superficial region, to about 30 kms depth, producing earthquakes of larger magnitude). His work identifies for the first time where active faults are located there in the Gibraltar Arc, which cause earthquakes, thus obtaining valuable geological and geophysical information that could help determine the areas where the probability of earthquakes is greater.
The author of the research Fermín Fernández Ibáñez, whose thesis on “seismicity, rheology and thermal structure of the Gibraltar Arc crust” was directed by prof. Juan Ignacio Soto Hermoso and José Soto Molars. This study, framed within the project SAGAS, the Andalusian Institute of Earth Sciences, has conducted the most comprehensive radiography of the failures of the Alboran Sea. Researchers have characterized a region of intense deformation in which the relative movement of blocks is caused by strike-slip faults left in the direction of movement, called “Transalboran the fault zone, which expands from Murcia to Alhucemas (Morocco). The other major failure of the Gibraltar Arc, which crosses the perpendicularly-runs from Malaga to the Algerian coast, and is called Nerja-Yusuf.
Study of oil wells
Fernández and Soto assure that geological terms, the south of the Iberian Peninsula and North Africa are in a similar way. To characterize the manner in which the Gibraltar Arc is being deformed due to pushing plates, the researchers studied oil wells, analyzing disfigurations caused by these forces.
The thesis Fermín Fernández Ibáñez can help prevent natural disasters. The author argues that, even has an intense seismic activity and movements of the faults could produce tsunamis in the Gibraltar Arc is almost impossible to occur a phenomenon of such magnitude.
The work relates the temperature of the crust with seismic activity. So, have found that in geographic areas with higher temperatures there is much less likely that earthquakes occur where the temperature is lower. Within the Gibraltar Arc region west of Sierra Nevada and Alhucemas are more earthquake zones – low temperatures of the earth’s crust, while the area of Almeria and eastern Alboran Sea are the least likely to suffer movements intense land.
The results have been published in scientific journals “Journal of Geophysical Research or Tectonics. The research group is part of Topo-Iberia, a project that aims to create a temporary seismic network broadband unprecedented in our country, consisting of a minimum of 80 seismic stations.
More information: http://prensa.ugr.es/prensa/investigacion/index.php
|Category: Geography||Tags: earthquakes., geometry, geophysical information, Gibraltar Arc, regionm grenadine, rheology, seismicity|