Surface wave tomography in Northwestern South America

Juan Carlos Bermúdez Barrios (M. Sc. Student)Maria Cristina Dimaté Castellanos (Thesis Director)

Tectonic context

• Northwestern South America: convergence zone between Nazca, Caribbean plates, Chocó-Panamá Block and South American Plates.

• Broad deformation zone in the Colombian Andes

(A. Taboada, L. Rivera, et al., Tectonics, 2000)

Problems to solve• Plate boundaries: Caribbean plate southern boundary in Colombia

In Audemar et al., 1999Taboada et al., 2000

?

• Nazca and Caribbean geometry

Corredor, 2000)

• ... and Panamá Block

(A. Taboada, L. Rivera, et al., Tectonics, 2000)

•Lateral variations in velocity corresponding to large tectonic provinces: Panamá block, Andean Block.

• Moho depth

Data

Stations Map

Red triangles: IRIS stations

Blue triangles: RSNC stations

Miller et al., 2009

Events similar to ...

Questions

• Range of station-event distances

• Range of surface wave periods

• Preprocessing of waveforms