TY  - CONF
ID  - epos1990
UR  - http://meetingorganizer.copernicus.org/EGU2017/EGU2017-1874-1.pdf
A1  - Lopez-Comino, Jose Angel
A1  - Cesca, Simone
A1  - Kriegerowski, Marius
A1  - Heimann, Sebastian
A1  - Dahm, Torsten
A1  - Mirek, Janusz
A1  - Lasocki, Stanislaw
Y1  - 2017///
N2  - Induced seismicity related to industrial processes including shale gas and oil exploitation is a current issues that im-
plies enough reasons to be concerned. Hydraulic fracturing usually induces weak events. However, scenarios with
larger earthquakes are possible, e.g. if the injected ?uids alter friction conditions and trigger the failure of neigh-
bouring faults. This work is focused on a hydrofracking experiment monitored in the framework of the SHEER
(SHale gas Exploration and Exploitation induced Risks) EU project at the Wysin site, located in the central-western
part of the Peribaltic synclise of Pomerania, Poland. A speci?c network setup has been installed combining surface
installation with three small-scale arrays and a shallow borehole installation. The fracking operations were carried
out in June and July 2016 at a depth 4000 m. The monitoring has been operational before, during and after the
termination of hydraulic fracturing operations. We apply a recently developed automated full waveform detection
algorithm based on the stacking of smooth characteristic function and the identi?cation of high coherence in the
signals recorded at different stations. The method was tested with synthetic data and different detector levels yield-
ing values of magnitude of completeness around 0.1. An unsupervised detection catalogue is generated with real
data for a time period May-September 2016. We identify strong temporal changes (day/night) of the detection
performance. A manual revision of the detected signals reveals that most detections are associated to local and
regional seismic signals. Only two events could be assigned to the volume potentially affected by the fracking
operations.
TI  - Assessing the induced seismicity by hydraulic fracturing at the Wysin site (Poland)
M2  - Vienna, Austria
AV  - public
T2  - EGU General Assembly 2017
ER  -