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NUEVO PROGRAMA GEOCIENCIAS UNIANDES 2011-01 (LINK)

Paper online:

factor_irf

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.

map_time

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.

 

  1. 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.

  2. 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.

  3. 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.

  4. Baltay, A., G. Prieto, and G. C. Beroza (2010), Radiated seismic energy from coda measurements and no scaling in apparent stress with seismic moment, J. Geophys. Res., 115, B08314, doi:10.1029/2009JB006736.

  5. Elipot, S., R. Lumpkin, G. A. Prieto. (2010) Inertial Oscillation modification by mesoscale vorticity. J. Geophys. Res., 115, C09010, doi:10.1029/2009JC005679.

  6. Prieto, G. A., J. F. Lawrence, G. C. Beroza. (2009), Anelastic Earth Structure from the Coherency of the Ambient Seismic Field, J. Geophys. Res., 114, B07303, doi:10.1029/2008JB006067.

  7. Prieto, G. A., R. L. Parker, F. L. Vernon. (2009), A Fortran 90 library for multitaper spectrum analysis, Computers and Geosciences, 35, pp. 1701-1710. doi:10.1016/ j.cageo.2008.06.007

  8. Prieto, G. A., G. C. Beroza. (2008), Earthquake Ground Motion Prediction Using the Ambient Seismic Field, Geophys. Res. Lett., 35, L14304, doi:10.1029/2008GL034428.

  9. Ma, S, G. A. Prieto, G. C. Beroza. (2008), Testing Community Velocity Models for Southern California Using the Ambient Seismic Field, Bull. Seism. Soc. Am., 98, (6), pp. 2694-2714, doi: 10.1785 /0120080947.

  10. Prieto, G. A., R. L. Parker, D. J. Thomson, F. L. Vernon, and R. L. Graham (2007), Reducing the bias of multitaper spectrum estimates, Geophys. J. Int., 171, 1269-1281. doi: 10.1111/j.1365- 246X.2007.03592.x.

  11. Prieto, G. A., D. J. Thomson, F. L. Vernon, P. M. Shearer and R. L. Parker (2007), Confidence intervals of earthquake source parameters, Geophys. J. Int., 168, 1227-1234. doi: 10.1111/j.1365- 246X.2006.03257.x.

  12. Prieto, G. A., R. L. Parker, F. L. Vernon, P. M. Shearer and D. J. Thomson (2006), Uncertainties in earthquake source spectrum estimation using empirical Green functions. Earthquakes: Radiated Energy and the Physics of Faulting, Abercrombie, McGarr, Kanamori, and di Toro eds. AGU Geophys. Monograph 170, pp. 69-74. doi : 10.1029/170GM08.

  13. Shearer, P. M., G. A. Prieto, and E. Hauksson (2006), Comprehensive analysis of earthquake source spectra in southern California, J. Geophys. Res., 111, B06303, doi:10.1029/2005JB003979.

  14. Prieto, G. A., F. L. Vernon, G. Masters, D. J. Thomson. (2005), Multitaper Wigner-Ville Spectrum for Detecting Dispersive Signals from Earthquake Records, Proceedings of the Thirty-Ninth Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA., pp 938-941. Copyright 2005 IEEE.

  15. Prieto, G. A., P. M. Shearer, F. L. Vernon, D. Kilb. (2004), Earthquake source scaling and self-similarity estimation from stacking P and S spectra, J. Geophys. Res., 109, B08310, doi 10.1029/2004JB003084.

In Press/Review

  1. Prieto, G. A.. M. Denolle, J. F. Lawrence, G. C. Beroza (2010) On amplitude information carried by the ambient seismic field. Accepted at Comptes rendus geoscience. Thematic Issue: Imaging and Monitoring with Seismic Noise.

  2. Lawrence, J. F., G. A. Prieto (2010) Attenuation tomography of the western United States from Ambient Seismic Noise. In press at J. Geophys. Res.

Selected Presentations and Posters

Prieto, G. A., G. C. Beroza (2008) Earthquake ground motion prediction using the ambient seismic field. 2008 SSA Annual Meeting Abstracts.

Kane, D. L., G. A. Prieto, F. L. Vernon, P. M. Shearer (2008) Source parameter estimates: Using a small aperture array to determine error. 2008 SSA Annual Meeting Abstracts.

Baltay, A. M., G. A. Prieto, G. C. Beroza (2008) Revisiting energy estimates using the seismic coda and empirical Green's functions. 2008 SSA Annual Meeting Abstracts.

Prieto, G. A., G. C. Beroza (2007) Earthquake ground motion prediction using the ambient seismic field. Eos Trans. AGU,88(52), Fall Meet. Suppl.

Prieto, G. A., F. L. Vernon and P. M. Shearer (2007) Quantifying the uncertainties and resolving power of surface stations for earthquake source parameter estimation using a small aperture radar. 2007 SSA Annual Meeting Abstracts.

Prieto, G. A., R. L. Parker, D. J. Thomson, F. L. Vernon and P. M. Shearer (2006), Unbiased Spectrum Estimation: Improved Multiple Taper Spectral Analysis, Eos Trans. AGU,87(52), Fall Meet. Suppl.

Prieto, G. A., D. J. Thomson and F. L. Vernon (2005), Time derivatives of the spectrum: Relaxing the stationarity assumption, Eos Trans. AGU, 86(52), Fall Meet. Suppl.

Kilb, D, Agnew, D C, Allmann, B, Kane, D L, Lin, G, Prieto, G A, Shearer, P M, Vernon, F L, AU: Walker, K T (2005), The 2001 and 2005 Anza Aftershock Sequences: Examination of Mainshock Rupture Direction, Post-Seismic Creep, Focal Mechanisms and Spatial/Temporal Behavior of Relocated Aftershocks, Eos Trans. AGU, 86(52), Fall Meet. Suppl.

Shearer, P. M., E. Hauksson and G. A. Prieto (2004), Earthquake source properties in southern California from stacking P-wave spectra, Eos Trans. AGU, 85(47), Fall Meet. Suppl.

Prieto, G. A., F. L. Vernon and R. L. Parker (2004), Time-Frequency analysis of seismic signals using the Wigner-Ville Spectrum (Poster), Eos Trans. AGU, 85(47), Fall Meet. Suppl.