PRELIMINARY SEISMOTECTONIC REGIONAL DETERMINATION OF A ANDEAN EASTERN COLOMBIAN FOOTHILLS SECTOR: AN JUAN DE ARAMA - CUMARAL, META, COLOMBIA.

  With the regional tectonic scenario determination carried out with remote sensors, secondary information and field observations, be determined that the faults related to the Eastern Frontal Fault System - EFFS, obeys to a geometry of shortcut planes with maximum longitudes of 30 km, these represent thrust faults that limit to the Andean basement with the South American plate. Also with the support of the historical seismicity and instrumental seismicity registration of the RSNC for the period 1993 - 2001, low seismic activity was determined between 3º and 4º N, and moderate seismic activity to the south of this latitude. This sector of EFFS is composed by listric fault type with low dip angle toward depth under compression stress regime and it seismicity obeys to stress release of these planes in the contact area where the basements converge. The maximum magnitude estimated is M ≥ 6,0 with 5 - 30 km depth hypocenters. However the low previous seismological information and few studies in these faults yet hinder the realization of earthquake prediction in probabilistic sense for these.   Key Words: Andean Eastern Cordillera Foothill, Eastern Frontal Fault System, Geotectonics, Seismicity, Seismotectonics  

• Fecha de publicación: 2007
• Institución: Universidad Industrial de Santander
• Repositorio: Repositorio UIS
• Idioma: spa
• OAI Identifier: oai:noesis.uis.edu.co:20.500.14071/4995
• Acceso en línea: https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/839; https://noesis.uis.edu.co/handle/20.500.14071/4995
• Rights: openAccess
• License: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)