Seismic activity in Costa Rica during 2012

Revista Geológica de América Central

Barquero, Rafael¹  Rojas, Wilfredo¹  Linkimer, Lepolt¹  Taylor, Magda¹  Araya, María C.¹  Vargas, Alberto¹ 

[1] Red Sismológica Nacional, San Pedro, Costa Rica

关键词: /span> Seismicity in 2012;    Costa Rican seismic sources;    Samara earthquake;   

DOI  :  

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

During 2012, the National Seismological Network (RSN: UCR-ICE) recorded 3455 local earthquakes and reported 260 felt events. This high level of seismicity was mainly the result of the aftershocks and triggered seismicity of the Samara earthquake on 5 of September (Mw 7,6). There were also 12 significant earthquakes with magnitude ≥ 5,0. The majority (90%) of earthquakes were shallow (< 30 km) and 56% had low magnitude (Mw 3,0-3,9). The subduction of the Cocos Plate beneath the Caribbean Plate and the Panama microplate generated 53% of felt earthquakes. Local faults originated 45% of felt seismicity, mainly in the Central Valley, the Calero Island, and the Coto Brus regions. The highest intensity observed during 2012 was VII (Modified Mercalli, MM) in the Nicoya Peninsula and in the Zarcero-Naranjo region due to the Samara earthquake. Moreover, eight other earthquakes produced intensities of V (MM).

【 授权许可】

CC BY-NC