eprintid: 1265
rev_number: 17
eprint_status: archive
userid: 2
dir: disk0/00/00/12/65
datestamp: 2015-02-16 08:02:18
lastmod: 2017-09-20 12:44:02
status_changed: 2015-04-27 12:10:34
type: article
metadata_visibility: show
creators_name: Häge, Martin
creators_name: Blascheck, Patrick
creators_name: Joswig, Manfred
creators_id: haege@geophys.uni-stuttgart.de
creators_id: 
creators_id: 
corp_creators: Institute of Geophysics, University of Stuttgart, Stuttgart, Germany
title: EGS hydraulic stimulation monitoring by surface arrays - location accuracy and completeness magnitude: the Basel Deep Heat Mining Project case study
ispublished: pub
subjects: RS1
subjects: SG
subjects: SS
divisions: EPOS-P
full_text_status: none
keywords: Geothermal
        Enhanced geothermal systems
        Deep Heat Mining Basel
        Induced seismicity
        Mini arrays
abstract: 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.
date: 2013
publication: Journal of Seismology
volume: 17
number: 1
publisher: Springer Verlag
pagerange: 51-61
id_number: doi:10.1007/s10950-012-9312-9
refereed: TRUE
issn: 1383-4649
official_url: http://dx.doi.org/10.1007/s10950-012-9312-9
access_IS-EPOS: limited
owner: Publisher
citation:   Häge, Martin and Blascheck, Patrick and Joswig, Manfred  (2013) EGS hydraulic stimulation monitoring by surface arrays - location accuracy and completeness magnitude: the Basel Deep Heat Mining Project case study.  Journal of Seismology, 17 (1).  pp. 51-61. DOI: https://doi.org/10.1007/s10950-012-9312-9 <https://doi.org/10.1007/s10950-012-9312-9>