TY  - JOUR
ID  - epos1265
UR  - http://dx.doi.org/10.1007/s10950-012-9312-9
IS  - 1
A1  - Häge, Martin
A1  - Blascheck, Patrick
A1  - Joswig, Manfred
N2  - The potential and limits of monitoring induced seismicity by surface-based mini arrays was evaluated for the hydraulic stimulation of the Basel Deep Heat Mining Project. This project aimed at the exploitation of geothermal heat from a depth of about 4,630 m. As reference for our results, a network of borehole stations by Geothermal Explorers Ltd. provided ground truth information. We utilized array processing, sonogram event detection and outlier-resistant, graphical jackknife location procedures to compensate for the decrease in signal-to-noise ratio at the surface. We could correctly resolve the NNW?SSE striking fault plane by relative master event locations. Statistical analysis of our catalog data resulted in M L 0.36 as completeness magnitude, but with significant day-to-night dependency. To compare to the performance of borehole data with M W 0.9 as completeness magnitude, we applied two methods for converting M L to M W which raised our M C to M W in the range of 0.99?1.13. Further, the b value for the duration of our measurement was calculated to 1.14 (related to M L), respectively 1.66 (related to M W), but changes over time could not be resolved from the error bars.
VL  - 17
TI  - EGS hydraulic stimulation monitoring by surface arrays - location accuracy and completeness magnitude: the Basel Deep Heat Mining Project case study
AV  - none
EP  - 61
Y1  - 2013///
PB  - Springer Verlag
JF  - Journal of Seismology
KW  - Geothermal
        Enhanced geothermal systems
        Deep Heat Mining Basel
        Induced seismicity
        Mini arrays
SN  - 1383-4649
SP  - 51
ER  -