The Tobosi Fault: Source of the 2011-2012 Tobosi Earthquake Swarm in Central Costa Rica

 

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Autores: Araya, María C., Linkimer, Lepolt, Montero, Walter, Rojas, Wilfredo
Formato: artículo original
Estado:Versión publicada
Fecha de Publicación:2015
Descripción:The Central Costa Rica Deformed Belt (CCRDB) is an ~100-km broad zone of deformation that marks the boundary between the Caribbean Plate and the Panama Microplate. From December 2011 to February 2012, an earthquake swarm took place in a portion of the CCRDB, near the town of Tobosi, 7 km southwest of the city of Cartago. In this study, data recorded by the National Seismological Network of Costa Rica (RSN: UCR-ICE) is used to relocate the earthquakes and calculate their focal mechanisms. Additionally, the tectonic geomorphology of the region is analyzed. The results show a transtension structure near the town of Tobosi, which comprises at least three faults, named: the Tobosi, Tablon, and Alumbre faults. It was found that the Tobosi fault is an active left-lateral strike-slip fault with a normal component and was the source of the Tobosi earthquake swarm.
País:Portal de Revistas UCR
Institución:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Lenguaje:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/21145
Acceso en línea:https://revistas.ucr.ac.cr/index.php/geologica/article/view/21145
Access Level:acceso abierto
Palabra clave:Active fault
earthquake swarm
seismic hazard
Tobosi
Costa Rica
focal mechanisms
Falla activa
enjambre sísmico
amenaza sísmica
mecanismos focales