Germán A. Prieto's Webpage

NUEVO PROGRAMA GEOCIENCIAS UNIANDES 2011-01 (LINK)

Paper online:

Just published in BSSA, we quantify variations in source parameter estimates at closely spaced stations. Accurate estimates of course parameters and their uncertainties are essential, particularly when the results are used in the comparisons among different studies over a range of earthquake magnitudes and locations.

We use an empirical Green’s function method to spectra estimated using the seismic coda to investigate earthquake source scaling. Our data span a magnitude range from Mw 3.0–Mw 7.1. We find that a constant scaled energy provides a reasonable fit to the data, with no dependence of scaled energy on seismic moment. Published in JGR. g can be generated from ambient noise. Figure above shows the IRF of the Factor Building in UCLA at two different frequency bands.

Seismology / Geophysics
	Assistant Professor, Departamento de Física Universidad de los Andes (2009 - Present) Ph.D - Scripps Inst. Oceanography (2007) B.S. - Univ. Nacional, Colombia (2002) Departamento de Física Calle 18A # 1 - 10 Bloque Ip, Of. 301 Universidad de los Andes AA 4976, Bogotá, Colombia Phone: 57 (1) 339-4949 Ext 4754 Fax: 57 (1) 332-4516 E-mail: gprieto@uniandes.edu.co

Research Interests

My main interest is to use seismic records to understand the earthquake source, the interior of the Earth and how both affect the ground motions that we feel on the Earth's surface. Seismological observations are affected by the internal structure of the Earth, for example amplification of seismic waves in sedimentary basins. The nature of the earthquake source has also a significant impact on ground motions, and I am interested in a better understanding of earthquake ruptures, i.e., are large earthquakes different from the more common small ones?

Current research project can be found here.

Curriculum Vitae

Education
2007 Ph.D. (Earth Sciences) UC San Diego
2004 M. Sc. (Earth Sciences) UC San Diego
2002 B.S. (Geology) Universidad Nacional de Colombia

Professional Experience
2009 - Present Assistant Professor - Universidad de los Andes
2007 - 2008 Thompson Postdoctoral Scholar, Stanford University
2002 - 2007 Graduate Student Researcher UC San Diego

Honours
2010 Keiiti Aki Young Scientist Award (video)

Publications

Baltay, A., S. Ide, G. A. Prieto, G. C. Beroza (2011) Variability in earthquake stress drop and apparent stress. Geophys. Res. Lett. 38, L06303, doi:10.1029/ 2011GL046698
Kane, D. L., G. A. Prieto, F. L. Vernon, P. M. Shearer (2011), Quantifying Seismic Source Parameter Uncertainties, B. Seism. Soc. Am., 101 (2), pp. 535-543, doi:10.1785/0120100166
Prieto, G. A., J. F. Lawrence and A. I Chung M. D. Kohler (2010), Impulse Response of Civil Structures from Ambient Noise Analysis, B. Seism. Soc. Am., 100 (5A), pp. 2322-2328, doi:10.1785/0120090285.
Elipot, S., R. Lumpkin, G. A. Prieto. (2010) Inertial Oscillation modification by mesoscale vorticity. J. Geophys. Res., 115, C09010, doi:10.1029/2009JC005679
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Research	Publications
See more of my research in this section. It will be updated as new topics are looked at.	Recent and old publications. Here you can find my most recent publications.
Software	Teaching
I have written a large number of programs in Fortran 90 that I use for my research and publications. This includes plotting software, multitaper codes and other random programs.	This semester (2009-02) I am teaching Natural Disasters. Previous courses can also be found in this link.