A5005994483- Geological and Tectonic Studies in Latin America
- earthquake and tectonic studies
- Seismic Performance and Analysis
- Botany and Geology in Latin America and Caribbean
- Seismic Waves and Analysis
- Structural Health Monitoring Techniques
- Earthquake Detection and Analysis
- Complex Systems and Time Series Analysis
- Infrastructure Resilience and Vulnerability Analysis
- Geological and Geochemical Analysis
- Streptococcal Infections and Treatments
- Wind and Air Flow Studies
Colombian Geological Survey
1996-2024
Observatorio San Calixto
2020
This study presents a seismic risk assessment and set of earthquake scenarios for the residential building stock three largest metropolitan centers Colombia: Bogotá, Medellín Cali (with 8.0, 2.5, 2.4 million inhabitants, respectively). A uniform methodology was followed development hazard, vulnerability, exposure models, thus allowing direct comparison between different cities. Risk metrics such as exceedance probability curves average annual losses were computed each city. The selected...
ABSTRACT Crustal earthquakes are some of the main contributors to seismic hazard in northern South America (NoSAm). There is evidence historical crustal events with epicenters near populated cities, such as 1999 Mw 6.2 Coffee Region earthquake, whose damages added up 1.9% Colombia’s gross domestic product and reported about 1200 deaths. Because global ground-motion models (GMMs) routinely used assessments region biased respect available records, this article presents a regional GMM developed...
Subduction ground motions in northern South America are about a factor of 2 smaller than the for similar events other regions. Nevertheless, historical and recent large-interface intermediate-depth slab earthquakes moment magnitudes M w = 7.8 (Ecuador, 2016) 7.2 (Colombia, 2012) evidenced vast potential damage that vulnerable populations close to earthquake epicenters could experience. This article proposes new empirical ground-motion prediction model subduction America, regionalization...
This article proposes a semiempirical model to estimate seismic site effects based on predominant-period classification scheme for application in earthquake ground-motion models (GMMs). The proposed introduces the use of peak amplitude average horizontal-to-vertical ratio spectral response obtained from records. is implemented within GMM estimated using records northern South America. research compares performance function with other formulations V S30 or predominant period. approach yields...
In this study, we investigate the performance of several parameters as estimators seismic site effects for sites in northern South America. Investigated include conventional time-averaged shear wave velocity upper 30 m (VS30), predominant period site, and horizontal-to-vertical spectral ratios. To assess these parameters, estimate amplification waves within shallow soil layers (i.e., effects) at recording stations across The is estimated by analyzing residuals calculated from ground-motion...
Abstract The Bucaramanga seismic nest has the highest concentration in volume of intermediate depth events with light and moderate magnitudes (Mb > 4.8) worldwide. Despite ( Z hypo ≥ 100 km), these play a crucial role hazard assessment for several cities northern South America (NoSAm), particularly those situated close to their epicenters. Moreover, earthquakes are widely felt across country, even hundreds kilometers away from nest. This paper assesses performance commonly used subduction...
In Colombia, recent lavas from Nevado del Huila and Puracé volcanoes, located in the middle part of Cordillera Central, show geochemical characteristics with a adakitic signature (i.e. high Sr LREE contents, low Y HREE Sr/Y La/ Yb, 87Sr/86Sr <0,7045). These have been associated to specific tectonic settings that allow participation subduced slab melts genesis magmas. Analysis seismicity gravimetric anomalies allows infer geometry subduction, information magnetic ages oceanic floor, make...
Este artículo presenta el conjunto de datos terremotos denominado Catálogo Sísmico Integrado (CSI) para Colombia y territorios limítrofes (fronteras con Costa Rica, Ecuador, Nicaragua, Panamá, Perú Venezuela). El CSI contiene soluciones denominadas preferidas, construidas base en catálogos sísmicos globales regionales. Cada solución preferida incluye las mejores alternativas disponibles magnitud localización, seleccionadas entre candidatas provenientes los diferentes recopilados siguiendo...
En este artículo se presentan los datos de las intensidades macrosísmicas y efectos sismos que han causado daños significativos en Colombia, generados informes sismicidad histórica elaboran proyectos amenaza riesgo sísmico del Servicio Geológico Colombiano (SGC). Estos son resultado la investigación basada recopilación, organización análisis información relacionada con sismos, acuerdo metodología Escala Macrosísmica Europea 1998 (EMS-98), maneja descripciones grados intensidad según...
Located in the extreme northwestern part of Los Coconucos volcanic chain Central Cordillera, Purace is one Colombia's most active volcanoes. Recent geological studies indicate an eruptive history mainly explosive behavior which was marked recently by a minor ash eruption 1977. Techniques used to forecast renewal activity volcanoes after long period quiescence include monitoring seismicity and ground deformation near volcano. As first approach toward volcano, Southwest Seismological...
We present initial remote sensing and field data that suggest active distributed right-lateral faulting at the northern edge of Quito-Latacunga tectonic block in Ecuador southern Colombia. In this region, oblique subduction Nazca Plate beneath South America plate induces northward migration Northern Andean Sliver (NAS), with respect to stable America. Recent geodetic studies now sliver is composed several independent blocks, boundaries these blocks are locations where we hypothesize crustal...
<title>Abstract</title> The Bucaramanga seismic nest has the highest concentration of events with magnitudes over 4.8 worldwide. Despite depth, these play a crucial role in hazard assessment for several cities northern South America (NoSAm), particularly those situated close to their epicenters. Moreover, earthquakes are widely felt across country, even hundreds kilometers away from nest. This paper assesses performance commonly used subduction intra-slab Ground Motion Models (GMMs)...