post_instability_rev

New paper on fault instability at The Geysers

We published a new paper in Journal of Geophysical Research: Solid Earth that discusses the influence of long-term fluid injection on fault reactivation potential at The Geysers geothermal field, California.

References:

Martínez-Garzón, P., Kwiatek, G., Bohnhoff, M., and G. Dresen (2016). Impact of fluid injection on fracture reactivation at The Geysers geothermal field. J. Geophys. Res. 121, DOI: 10.1002/2016JB013137. [ Article Page ]

post_grl_sensitivity_pore_pressure_rev

Paper on the influence of pore pressure changes on stress tensor inversion parameters

Another paper! This time we discuss the influence of temporal changes in pore pressure on the results of stress tensor inversion from focal mechanisms, with the special focus on stress shape ratio coefficient. There is also a neat presentation of the effects using the data from The Geysers geothermal field. The paper has been published in Geophysical Research Letters. Have fun!

Reference:

Martínez-Garzón, P., Vavryčuk, V., Kwiatek, G., and M. Bohnhoff. Sensitivity of stress inversion of focal mechanisms to pore pressure changes (2016). Geophys. Res. Lett., 43, 8441-8450, DOI: 10.1002/2016GL070145. [ Article Page ]

JGF paper - limits on detection and analysis of small earthquakes

Paper on theoretical limits on detection and analysis of small earthquakes

Finally, the paper entitled “Theoretical limits on detection and analysis
of small earthquakes” has been published in Journal of Geophysical Research: Solid Earth. In this paper we investigate theoretical limits on detection and reliable estimates of source characteristics of small earthquakes using synthetic seismograms for shear/tensile dislocations on kinematic circular ruptures and observed seismic noise and properties of several acquisition systems (instrument response, sampling rate). The results presented in the manuscript provide guidelines on detection of small events in various geological environments, along with information relevant to reliable analyses of earthquake source properties.

Reference:

Kwiatek, G., and Y. Ben-Zion (2016), Theoretical limits on detection and analysis of small earthquakes, Journal of Geophysical Research-Solid Earth, 121, doi:10.1002/2016JB012908.
post_hybridmt_rev

SRL paper on hybridMT package

Finally, the paper on hybridMT MATLAB/shell environment package for seismic moment tensor inversion and refinement is out! The paper, published in Seismological Research Letters – Electronic Seismologist is freely available for download:

Grzegorz Kwiatek, Patricia Martinez-Garzon and M. Bohnhoff (2016). HybridMT: A MATLAB/shell environment package for seismic moment tensor inversion and refinement. Seismol. Res. Lett. 87 (4), DOI: 10.1785/0220150251.. (1.8 MiB)

 

Paper by Stierle et al.

On acoustic emissions, moment tensors and anisotropy

We have published a paper related to the analysis of seismic moment tensors of acoustic emission data with a special focus on effects of rock anisotropy on resulting moment tensors.

Stierle, E., V. Vavryčuk, G. Kwiatek, E.-M. Charalampidou, and M. Bohnhoff (2016). Seismic moment tensors of acoustic emissions recorded during laboratory rock deformation experiments: sensitivity to attenuation and anisotropy, Geophysical Journal International 205, no. 1, 38–50, doi 10.1093/gji/ggw009.

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