%0 Journal Article %1 goertz-allmann_etal:2011 %A Goertz-Allmann, Bettina P. %A Goertz, Alex %A Wiemer, Stefan %D 2011 %J Geophysical Research Letters %K geophysics seismology %N 9 %P L09308+ %R 10.1029/2011GL047498 %T Stress drop variations of induced earthquakes at the Basel geothermal site %U http://dx.doi.org/10.1029/2011GL047498 %V 38 %X We determine stress drops from P-wave spectra of about 1000 earthquakes induced by hydraulic stimulation in crystalline rock for a deep heat mining project in Basel, Switzerland. We observe an increase in stress drop by about a factor of five with radial distance from 10 m to 300 m, which suggests that stress drop correlates with pore pressure perturbations due to the injection. We test this hypothesis by calculating the injection-related pore pressure perturbation based on a simple linear pore pressure diffusion model and find a good correlation of the expected pore pressure perturbation with the estimated stress drops.

@article{goertz-allmann_etal:2011, abstract = {We determine stress drops from P-wave spectra of about 1000 earthquakes induced by hydraulic stimulation in crystalline rock for a deep heat mining project in Basel, Switzerland. We observe an increase in stress drop by about a factor of five with radial distance from 10 m to 300 m, which suggests that stress drop correlates with pore pressure perturbations due to the injection. We test this hypothesis by calculating the injection-related pore pressure perturbation based on a simple linear pore pressure diffusion model and find a good correlation of the expected pore pressure perturbation with the estimated stress drops.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Goertz-Allmann, Bettina P. and Goertz, Alex and Wiemer, Stefan}, biburl = {https://www.bibsonomy.org/bibtex/24f09ef8fb093cabe59664815cecb94d5/nilsma}, day = 6, doi = {10.1029/2011GL047498}, interhash = {be3255d5174982db5836f1f38a6d9a18}, intrahash = {4f09ef8fb093cabe59664815cecb94d5}, issn = {0094-8276}, journal = {Geophysical Research Letters}, keywords = {geophysics seismology}, month = may, number = 9, pages = {L09308+}, timestamp = {2021-02-09T13:26:17.000+0100}, title = {Stress drop variations of induced earthquakes at the Basel geothermal site}, url = {http://dx.doi.org/10.1029/2011GL047498}, volume = 38, year = 2011 }