Revista Geologica de America Central | |
The Tobosi fault: source of the 2011-2012 Tobosi earthquake swarm in central Costa Rica | |
Rojas, Wilfredo1  Linkimer, Lepolt1  Araya, MarÃa C.1  Montero, Walter1  | |
[1] Universidad de Costa Rica, San Pedro, CR | |
关键词: Active fault; earthquake swarm; seismic hazard; Tobosi; Costa Rica; focal mechanisms.; | |
DOI : 10.15517/rgac.v53i0.21145 | |
学科分类:地质学 | |
来源: Universidad de Costa Rica * Editorial | |
【 摘 要 】
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 Car-tago. 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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201904282781106ZK.pdf | 1768KB | download |