Published

2007-01-01

CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA

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Authors

  • Orlando Hernandez-Pardo
  • Ralph R. B. von Frese
  • Jeong Woo Kim
Any uncompensated mass of the northern Andes Mountains is presumably under pressure to adjust within the Earth to its ideal state of isostatic equilibrium. Isostasy is the ideal state that any
uncompensated mass seeks to achieve in time. These pressures interact with the relative motions between adjacent plates that give rise to earthquakes along the plate boundaries. By combining the
gravity MOHO estimates and crustal discontinuities with historical and instrumental seismological catalogs the correlation between isostatically disturbed terrains and seismicity has been established.
The thinner and thicker crustal regions were mapped from the zero horizontal curvature of the crustal thickness estimates. These boundaries or edges of crustal thickness variations were compared to
crustal discontinuities inferred from gravity and magnetic anomalies and the patterns of seismicity that have been catalogued for the last 363 years. The seismicity is very intense along the Nazca-North
Andes, Caribbean-North American and North Andes-South American collision zones and associated with regional tectonic compressional stresses that have locally increased and/or diminished by
compressional and tensional stress, respectively, due to crustal thickness variations. High seismicity is also associated with the Nazca-Cocos diverging plate boundary whereas low seismicity is associated with the Panama-Nazca Transform Fault and the South American Plate.

How to Cite

APA

Hernandez-Pardo, O., B. von Frese, R. R., & Woo Kim, J. (2007). CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA. Earth Sciences Research Journal, 11(1), 81-94. Retrieved from https://revistas.unal.edu.co/index.php/esrj/article/view/21211

ACM

[1]
Hernandez-Pardo, O., B. von Frese, R.R. and Woo Kim, J. 2007. CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA. Earth Sciences Research Journal. 11, 1 (Jan. 2007), 81-94.

ACS

(1)
Hernandez-Pardo, O.; B. von Frese, R. R.; Woo Kim, J. CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA. Earth sci. res. j. 2007, 11, 81-94.

ABNT

HERNANDEZ-PARDO, O.; B. VON FRESE, R. R.; WOO KIM, J. CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA. Earth Sciences Research Journal, [S. l.], v. 11, n. 1, p. 81-94, 2007. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/21211. Acesso em: 16 oct. 2021.

Chicago

Hernandez-Pardo, Orlando, Ralph R. B. von Frese, and Jeong Woo Kim. 2007. “CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA”. Earth Sciences Research Journal 11 (1):81-94. https://revistas.unal.edu.co/index.php/esrj/article/view/21211.

Harvard

Hernandez-Pardo, O., B. von Frese, R. R. and Woo Kim, J. (2007) “CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA”, Earth Sciences Research Journal, 11(1), pp. 81-94. Available at: https://revistas.unal.edu.co/index.php/esrj/article/view/21211 (Accessed: 16October2021).

IEEE

[1]
O. Hernandez-Pardo, R. R. B. von Frese, and J. Woo Kim, “CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA”, Earth sci. res. j., vol. 11, no. 1, pp. 81-94, Jan. 2007.

MLA

Hernandez-Pardo, O., R. R. B. von Frese, and J. Woo Kim. “CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA”. Earth Sciences Research Journal, vol. 11, no. 1, Jan. 2007, pp. 81-94, https://revistas.unal.edu.co/index.php/esrj/article/view/21211.

Turabian

Hernandez-Pardo, Orlando, Ralph R. B. von Frese, and Jeong Woo Kim. “CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA”. Earth Sciences Research Journal 11, no. 1 (January 1, 2007): 81-94. Accessed October 16, 2021. https://revistas.unal.edu.co/index.php/esrj/article/view/21211.

Vancouver

1.
Hernandez-Pardo O, B. von Frese RR, Woo Kim J. CRUSTAL THICKNESS VARIATIONS AND SEISMICITY OF NORTHWESTERN SOUTH AMERICA. Earth sci. res. j. [Internet]. 2007Jan.1 [cited 2021Oct.16];11(1):81-94. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/21211

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