%0 Journal Article %1 bommer_etal:2006 %A Bommer, J. %A Oates, S. %A Cepeda, J. %A Lindholm, C. %A Bird, J. %A Torres, R. %A Marroquin, G. %A Rivas, J. %D 2006 %J Engineering Geology %K seismology %N 4 %P 287--306 %R 10.1016/j.enggeo.2005.11.002 %T Control of hazard due to seismicity induced by a hot fractured rock geothermal project %U http://dx.doi.org/10.1016/j.enggeo.2005.11.002 %V 83 %X In 2003 hydraulic stimulations were carried out in a geothermal field in eastern El Salvador, Central America, as part of a project to explore the feasibility of commercial hot fractured rock energy generation. A key requisite for this environmentally friendly energy source is that the fracturing of the hot rocks at depths of 1-2 km must not produce levels of ground shaking at the surface that would present a serious disturbance or threat to the local population. Thresholds of tolerable ground motion were inferred from guidelines and regulations on tolerable levels of vibration and from correlations between instrumental strong-motion parameters and intensity, considering the vulnerability of the exposed housing stock. The thresholds were defined in terms of peak ground velocity (PGV) and incorporated into a 'traffic light' system that also took account of the frequency of occurrence of the induced earthquakes. The system was implemented through a dedicated seismograph array and locally derived predictive equations for PGV. The 'traffic light' was used as a decision-making tool regarding the duration and intensity of pumping levels during the hydraulic stimulations. The system was supplemented by a small number of accelerographs and re-calibrated using records obtained during the rock fracturing.

@article{bommer_etal:2006, abstract = {In 2003 hydraulic stimulations were carried out in a geothermal field in eastern El Salvador, Central America, as part of a project to explore the feasibility of commercial hot fractured rock energy generation. A key requisite for this environmentally friendly energy source is that the fracturing of the hot rocks at depths of 1-2 km must not produce levels of ground shaking at the surface that would present a serious disturbance or threat to the local population. Thresholds of tolerable ground motion were inferred from guidelines and regulations on tolerable levels of vibration and from correlations between instrumental strong-motion parameters and intensity, considering the vulnerability of the exposed housing stock. The thresholds were defined in terms of peak ground velocity (PGV) and incorporated into a 'traffic light' system that also took account of the frequency of occurrence of the induced earthquakes. The system was implemented through a dedicated seismograph array and locally derived predictive equations for PGV. The 'traffic light' was used as a decision-making tool regarding the duration and intensity of pumping levels during the hydraulic stimulations. The system was supplemented by a small number of accelerographs and re-calibrated using records obtained during the rock fracturing.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Bommer, J. and Oates, S. and Cepeda, J. and Lindholm, C. and Bird, J. and Torres, R. and Marroquin, G. and Rivas, J.}, biburl = {https://www.bibsonomy.org/bibtex/21fa8a869a292cf2a9b39039eb3504acc/nilsma}, day = 03, doi = {10.1016/j.enggeo.2005.11.002}, interhash = {ca3715ce1ea8af8e592e13965f0861f3}, intrahash = {1fa8a869a292cf2a9b39039eb3504acc}, issn = {00137952}, journal = {Engineering Geology}, keywords = {seismology}, month = mar, number = 4, pages = {287--306}, timestamp = {2021-02-09T13:24:20.000+0100}, title = {Control of hazard due to seismicity induced by a hot fractured rock geothermal project}, url = {http://dx.doi.org/10.1016/j.enggeo.2005.11.002}, volume = 83, year = 2006 }