Space Geodesy Infrastructure in Colombia for Geodynamics Research

Mora‐Páez, Héctor; Peláez‐Gaviria, Juan‐Ramón; Diederix, Hans; Bohorquez-Orozco, O. P.; Cardona‐Piedrahita, Leonardo; Corchuelo‐Cuervo, Yuli; Ramírez‐Cadena, Jair; Díaz-Mila, Fredy

doi:10.1785/0220170185

Cited by 15 publications

(7 citation statements)

References 22 publications

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“…We first compute a stochastic model of geodetic coupling along the Ecuadorian subduction interface. We use inter-seismic GPS velocities computed by Chlieh et al (2014) and Nocquet et al (2014) from 29 stations installed in Ecuador and Colombia and measured from 1994 to 2012 (Mothes et al, 2018;Mora-Páez et al, 2018). Considering that more than 20 years separate the 1979 earthquake and the first GPS measures, it is unlikely that they are significantly affected by post-seismic deformation.…”

Section: Stochastic Inter-seismic Modelingmentioning

confidence: 99%

Strain budget of the Ecuador–Colombia subduction zone: A stochastic view

Gombert

Duputel

Jolivet

et al. 2018

Earth and Planetary Science Letters

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The 2016 Pedernales earthquake (M W =7.8) ruptured a portion of the Colombia-Ecuador subduction interface where several large historical earthquakes have been documented since the great 1906 earthquake (M =8.6). Considering all significant ruptures that occurred in the region, it has been suggested that the cumulative moment generated co-seismically along this part of the subduction over the last century exceeds the moment deficit accumulated interseismically since 1906. Such an excess challenges simple models with earthquakes resetting the elastic strain accumulated inter-seismically in locked asperities. These inferences are however associated with large uncertainties that are generally unknown. The impact of spatial smoothing constraints on co-seismic and inter-seismic models also prevents any robust assessment of the strain budget. We propose a Bayesian kinematic slip model of the 2016 Pedernales earthquake using the most comprehensive dataset to date including InSAR and

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Section: Stochastic Inter-seismic Modelingmentioning

confidence: 99%

Strain budget of the Ecuador–Colombia subduction zone: A stochastic view

Gombert

Duputel

Jolivet

et al. 2018

Earth and Planetary Science Letters

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“…At present (Mora-Páez et al, 2018), GPS data are processed with GIPSY-OASIS II software, version 6.3 developed by the Jet Propulsion Laboratory (JPL), California Institute of Technology (Zumberge et al, 1997;Bertiger et al, 2010). The station velocities are computed using HECTOR (Bos et al, 2013), a software package developed at SEGAL (Space & Earth Geodetic Analysis Laboratory at the University of Beira Interior, Portugal) which is capable of taking into account temporal correlations in the data to estimate the associated uncertainties.…”

Section: Gps Data Processingmentioning

confidence: 94%

“…The CORS network now has 108 stations: 92 GeoRED GNSS stations; 4 GNSS stations that are part of the COCONet (Continuously Operating Caribbean GPS Observational Network) project run by UNAVCO (University NAVSTAR Consortium); the Bogotá IGS GNSS station (BOGT); the San Andrés Island station (SAN0), and 10 stations installed under a collaborative partnership with local Colombian institutions, such as Cenicaña (Centro de Investigación de la Caña de Azúcar), Universidad Nacional de Colombia, Área Metropolitana del Valle de Aburrá, and the Empresa de Acueducto de Bogotá (Figure 4). Eight of the CORS stations were collocated with seismic stations that are part of the Red Sismológica Nacional de Colombia run also by the Servicio Geológico Colombiano and eleven stations were installed with meteorological sensors (Mora-Páez et al, 2018). Some of these stations have been used to perform geodetic ties with tide gauges installed in Colombia by the Dirección General Marítima (Dimar).…”

Section: Geored Networkmentioning

confidence: 99%

Chapter 14

SGC¹

2019

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Space geodetic measurements have transformed our understanding of regional tectonics in the North Andes and southwest Caribbean. The Central and South America GPS project, begun in 1988, provided the first direct measurement of subduction at a convergent plate boundary, and it led to the establishment of a global civilian GPS tracking network. Colombia was the center of the 1988 field campaign, and the leadership of Servicio Geológico Colombiano with logistics, training, and personnel was key to the success of the Central and South America project. Early GPS results showed evidence for northward movement of the North Andes, convergence at the South Caribbean deformed belt, rapid Panamá-North Andes collision, and interseismic "locking" at the Colombia-Ecuador trench. Beginning in 2007, space geodetic measurements took a great step forward with GeoRED project, a continuously operating Global Navigation Satellite System network that now has 108 sites providing the first accurate comprehensive model of North Andean Block motion. Recent GeoRED findings include that the North Andean Block is moving to the northeast at a rate of 8.6 mm/y, the Eastern Cordillera is being compressed at a rate of 4.3 mm/y, the Panamá Arc is colliding eastward with the North Andean Block at approximately 15-18 mm/y, and the Panamá-Chocó collision may have been responsible for much of the uplift of the Eastern Cordillera. The new continuous Global Navigation Satellite Systems measurements help quantify tectonic deformation in northwestern South America and the southwest Caribbean, including earthquake hazards at the Colombia trench, the Caribbean margin, the East Andean Fault System in the Eastern Cordillera, and the Panamá collision zone in northwestern Colombia; as well as the deformation of Colombian volcanoes.

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“…The general purpose of the GeoRED Project is to improve the technical, scientific and operational capabilities in Colombia for analysis, interpretation and policy formulation regarding phenomena related to crustal deformation in Colombia, using GNSS satellite technology. The GNSS GeoRED project is being executed under the operations framework of the Space Geodesy Research Group-SGRG of the Geohazards Directorate [48]. The current cGPS network has 153 stations installed as December 2020.…”

Section: Regional and National Geodetic Networkmentioning

confidence: 99%

GNSS Networks for Geodynamics in the Caribbean, Northwestern South America, and Central America

Mora‐Páez¹,

Audemard²

2021

Geodetic Sciences - Theory, Applications and Recent Developments

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For several years, under the framework of national and international projects, the number of GNSS geodetic stations has been increasing in countries located in the area comprised by the Caribbean, northwestern South America and Central America. Data from these geodetic stations have made it possible not only to meet the needs for geospatial information in each of the countries, but also to get a better understanding about the geodynamic interaction of the Caribbean, South American, Nazca and Cocos plates, as well as tectonic blocks wedged in between these plates. This article presents a brief description of the tectonic framework, the existing geodetic networks and the results obtained using data from some stations in the study area.

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Space Geodesy Infrastructure in Colombia for Geodynamics Research

Cited by 15 publications

References 22 publications

Strain budget of the Ecuador–Colombia subduction zone: A stochastic view

Strain budget of the Ecuador–Colombia subduction zone: A stochastic view

Chapter 14

GNSS Networks for Geodynamics in the Caribbean, Northwestern South America, and Central America

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