Advice on the computation of peakground-velocity confidence regions for the Zuidlaren 23-12-2016 event

On request by the Technical Committee on ground movement (Tcbb), a study was carried out to define the region affected by induced earthquakes related to gas exploitation from gas fields outside the Groningen area. This request is based on advise that the Tcbb formulated in 2019, on a national approach for handling damage due to mining. Since there is no generic ground-motion model for gas fields outside the Groningen area, assumptions should be made with respect to the selection of the best model for the region. Most important is the build-up of the overburden of the gas field, combined with the availability of recorded acceleration data in the vicinity of the gas field. The 2016 induced earthquake near Zuidlaren was used to test the proposed procedure and results are presented in terms of contour plots of expected Peak Ground Velocity (PGV) contours for 1 mm/s untill the maximum level, with a 1, 10 and 50% probability of exceedance.