%A Bernard Dost
%A Elmer Ruigrok
%A Jesper Spetzler
%J Netherlands Journal of Geosciences
%T Development of seismicity and probabilistic hazard assessment for the Groningen gas field
%X 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.
%N 05
%P s235-s245
%V 96
%D 2017
%I Cambridge University Press
%R doi:10.1017/njg.2017.20
%L epos2049