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stress tensor

Stress tensor

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 ]

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 ]

Paper in GJI on stress field on North Anatolian fault

We published a paper entitled “Detailed analysis of spatiotemporal variations of the stress field orientation along the Izmit-Düzce rupture in NW Turkey from inversion of first-motion polarity data” in Geophysical Journal International.

The reference:

Ickrath, M., Bohnhoff, M., Dresen, G., Bulut, F., Martínez-Garzón, P., Kwiatek, G. and O. Germer (2015). Detailed analysis of spatiotemporal variations of the stress field orientation along the Izmit-Düzce rupture in NW Turkey from inversion of first-motion polarity data. Geophys J. Int. 202, 2120-2132, DOI: 10.1093/gji/ggv273 [ Article Page ]

Article on the stress tensor inversion package MSATSI

Finally, our paper on stress tensor inversion package MSATSI has been published in the recent issue of Seismological Research Letters! The package has an official page at MSATSI website at GFZ (short version), but the extensive documentation and multiple examples you can find at this website.

Martínez-Garzón, P., Kwiatek, G., Ickrath, M. and M. Bohnhoff (2013). MSATSI: A MATLAB package for stress inversion combining solid classic methodology, a new simplified user-handling and a visualization tool. Seismol. Res. Lett. 85 (4), 1-9, DOI: 10.1785/0220130189 [ Article page ]

First Break paper: Relocation, Spectral Ratio and Stress inversion

Another paper has been published in EAGE’s First Break journal. This time we presented the outcome of two studies related to analysis of induced seismicity at Berlin Geothermal Field, El Salvador and The Geysers geothermal field in USA. The paper is entitled: “High-resolution reservoir characterization using induced seismicity and state of the art waveform processing techniques” and you can find it here.

Reference: Kwiatek, G., Bohnhoff, M., Martínez-Garzón, P., Bulut, F. and G. Dresen (2013). High-resolution reservoir characterization using induced seismicity and state of the art waveform processing techniques. First Break 31 (7), 81-88.