Analysis of Colombian Seismicity as a Way to Explain and Understand The Bucaramanga Nest
Colombia is region with high seismicity due to the convergence of Panama Block, Nazca and Caribbean plates with the South American Plate, however there is a complex area named The Bucaramanga Nest which was the motive of this research means of its complexity, being that there have been different studies which have not been able to explain the reason of this phenomenon, for that motive this work has as objective finding this answer by the use of 3679 earthquake information in Colombia, with a Mw higher than 3.5. Having information from all the earthquakes, they were localized on its epicenters to notice how they were distributed, after that, five lines were chosen to make, along them, The Benioff Zone, obtaining the geometry of the slabs for Nazca and Caribbean plates, knowing the angle of subduction of them and how it changed, also, thirty earthquakes near the five lines were selected to see the focal mechanisms along the slabs and knowing the fault system in The Bucaramanga Nest. Beside all it was said before, it was modeled an approximation of the subduction zones by a contour map along the studied region. At the end, it was able to reach an answer about the reason of why The Bucaramanga Nest happened, defining its vertical and lateral extension too.
Corredor, F., 2003. Seismic strain rates and distributed continental deformation in the northern Andes and three-dimensional seismotectonics of northwestern South America. September, 372(3-4), 147-166. https://doi.org/10.1016/S0040-1951(03)00276-2
Cortés, M. & Angelier, J., 2005. Current states of stress in the northern Andes as indicated by focal mechanisms of earthquakes. Tectonophysics, July, Volume 403, 29-58. https://doi.org/10.1016/j.tecto.2005.03.020
Egbue, O., Kellogg, J., Aguirre, H. & Torres, C., 2013. Evolution of the stress and strain fields in the Eastern Cordillera, Colombia. Journal of Structural Geology, January, 58, 8-21. https://doi.org/10.1016/j.jsg.2013.10.004
Freymueller, J., Kellogg, J. & Vega, V., 1993. Plate Motions in the north Andean region. Journal of Geophysical Research, 10 December, 98(B12), 21,853-21,863. https://doi.org/10.1029/93JB00520
Frohlich, C., Kadinsky-Cade, K. & Davis, S., 1995. A Reexamination of the Bucaramanga, Colombia, Earthquake Nest. Bulletin of the Seismological Society of America, 85, 1622-1634.
Malavé, G., Suárez, G., 2018. Intermediate-depth seismicity in northern Colombia and western Venezuela and its relationship to Caribbean plate subduction. Tectonics 14, 617–628. https://doi.org/10.1029/95TC00334
Moncayo, G., Zuluaga, J. & Monsalve, G., 2018. Correlation between tides and seismicity in Northwestern South America: the case of Colombia. Cornell University Library, April. arXiv:1804.07235v1
Ojeda, A. & Havskov, J., 2001. Crustal structure and local seismicity in Colombia. Journal of Seismology, October, 5(4), 575–593. https://doi.org/10.1023/A:1012053206408
Pennington, W. D. et al., 1979. Results of a reconnaissance microearthquake survey of Bucaramanga, Colombia. Journal of Geophysical Research, 65-68. https://doi.org/10.1029/GL006i002p00065
Schneider, J., Pennington, W. & Meyer, R., 1987. Microseismicity and Focal Mechanisms of the Intermediate-Depth Bucaramanga Nest, Colombia. Journal of Geophysical Research, Volume 92, 13913-13926. https://doi.org/10.1029/JB092iB13p13913
Shih, X., Meyer, R. P. & Schneider, J. F., 1991. Seismic anisotropy above a subducting plate. Geology, 1 August , Volume 19, 807-810. https://doi.org/10.1130/0091-7613(1991)019<0807:SAAASP>2.3.CO;2
Taboada, A. et al., 2000. Geodynamics of the northern Andes: Subduction and intercontinental deformation (Colombia). Tectonics, 787-813.
Trenkamp, R., Kellogg, J.N., Freymueller, J.T., Mora, H.P., 2002. Wide plate margin deformation, southern Central America and northwestern South America, CASA GPS observations. J. South Am. Earth Sci. 15, 157–171. https://doi.org/https://doi.org/10.1016/S0895-9811(02)00018-4
Van Der Hilst, R. & Mann, P., 1994. Tectonic implications of tomographic images of subducted lithosphere beneath northwestern South America. Geology, Volume 22, 451-454. https://doi.org/10.1130/0091-7613(1994)022<0451:TIOTIO>2.3.CO;2
Vargas, C. A. & Mann, P., 2013. Tearing and Breaking Off of Subducted Slabs as the Result of Collision of the Panama Arc-Indenter with Northwestern South America. Bulletin of the Seismological Society of America, June, 103(3), 2025-2046. https://doi.org/10.1785/0120120328
Zarifi, Z., Havskov, J. & Hanyga, A., 2007. An insight into the Bucaramanga nest. Tectonophysics, 1 October, 443(1-2), 93-105. https://doi.org/10.1016/j.tecto.2007.06.004
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Copyright @2019. This is an open-access article distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License which permits unrestricted use, distribution, and reproduction in any medium. Copyrights of all materials published in JGEET are freely available without charge to users or / institution. Users are allowed to read, download, copy, distribute, search, or link to full-text articles in this journal without asking by giving appropriate credit, provide a link to the license, and indicate if changes were made. All of the remix, transform, or build upon the material must distribute the contributions under the same license as the original.