TY  - JOUR
ID  - epos2049
UR  - http://doi.org/10.1017/njg.2017.20
IS  - 05
A1  - Dost, Bernard
A1  - Ruigrok, Elmer
A1  - Spetzler, Jesper
Y1  - 2017/12//
N2  - The increase in number and strength of shallow induced seismicity connected to the Groningen gas field since 2003 and the occurrence of a ML 3.6
event in 2012 started the development of a full probabilistic seismic hazard assessment (PSHA) for Groningen, required by the regulator. Densification
of the monitoring network resulted in a decrease of the location threshold and magnitude of completeness down to ? ML = 0.5. Combined with a
detailed local velocity model, epicentre accuracy could be reduced from 0.5?1 km to 0.1?0.3 km and a vertical resolution ?0.3 km. Time-dependent
seismic activity is observed and taken into account into PSHA calculations. Development of the Ground Motion Model for Groningen resulted in a
significant reduction of the hazard. Comparison of different implementations of the PSHA, using different source models, based on either a compaction
model and production scenarios or on extrapolation of past seismicity, and methods of calculation, shows similar results.
PB  - Cambridge University Press
JF  - Netherlands Journal of Geosciences
VL  - 96
SN  - 0016-7746
TI  - Development of seismicity and probabilistic hazard assessment for the Groningen gas field
SP  - s235
AV  - none
EP  - s245
ER  -