Groningen gasfield

Documents and production plan for the Groningen field
TNO has produced the following reports and cover letters as part of the production plan procedure for the Groningen field (listed in date order):

July 2017

June 2016

On the right:
Film of a pressure wave moving through the Groningen gas field at a depth of around 3km below the surface. Please note the date. Average pressure decline in the 12 weeks before this date is indicated in blue. Red means the pressure decline is greater than average at that date (for a comparison, see bottom of picture). The white squares denote events in or near the gas field at around 3km depth below the surface. These squares appear on the date of the event and gradually fade over time

On the left:
The upper graph shows pressure development over time in the Loppersum area in the centre of the Groningen gas field at a point approximately 3km depth below the surface. Time is shown in numbers of weeks after the start of recording the film.

In the middle graph, the development of the pressure difference over time at the same point is compared with the average pressure in the preceding period (see bottom of picture). This is the same as in the figure on the right.

The final graph shows the events over time, plotted against the energy of the event (the released momentum).

Especially for mathematics buffs, the equation used to calculate the pressure difference is shown below :

in which Pi = pressure at time ti, ΔP is the pressure difference and M is the length of the moving average (12 weeks, so M=11).

December 2015


This film shows the earthquake density in the Groningen field each month since January 2003. (film details). The film script explains the period for which earthquake density has been calculated, using a standard Geo-Information System (GIS) application (Kernel density with a 5km radius) and a cell size of 50m. The film shows an increase in earthquake density from January 2003 to January 2014 (in the film: JAN 2014 = earthquake density from January 2013 to January 2014). The earthquake density has generally decreased from January 2014 onwards (for more details, see the report).

June 2015

January 2015

March 2014

December 2013

Recent papers and conference presentations on induced seismicity in Groningen


  • Fokker, P.A. and Van Thienen-Visser, K., Inversion of double-difference measurements from optical levelling for the Groningen gas field, International Journal of Applied Earth Observation and Geoinformation, 49: 1-9, 2016.
  • Van Thienen-Visser, K., Pruiksma, J.P. and Breunese, J.N., Compaction and subsidence of the Groningen gas field in the Netherlands, doi: 10.5194/PHIAS 372-367-2015.
  • Fokker, P.A. and Van Thienen-Visser, K., Inversion of double-difference measurements from optical levelling for the Groningen gas field, doi: 10.5194/PHAIS- 372-375-2015, doi:10.5194.
  • Van Thienen-Visser, K. and Breunese, J.N., Induced seismicity of the Groningen gas field: History and recent developments, The Leading Edge 43(6):664-671, 2015.
  • Wees, J.D., Buijze, L., Van Thienen-Visser, K. and Fokker, P.A., ‘Geomechanics response and induced seismicity during gas field depletion in the Netherlands’, Geothermics 52: 206-219, 2014.
  • Pruiksma, J.P., Breunese, J.N., Van Thienen-Visser, K. and De Waal., H., ‘Isotach formulation of the rate type compaction model for sandstone’, International Journal of Rock Mechanics and Mining Sciences, 78:127-132, 2015.
  • De Waal., H., Van Thienen-Visser, K. and Pruiksma, J.P., Rate type isotach compaction of consolidated sandstone, ARMA 15-436, 2015.
  • Fokker, P.A. and Van Thienen-Visser, K. On the use of double differences in Inversion of surface movement measurements, ARMA 15-096, 2015.
  • Steenbergen, R.D.J.M. and Vrouwenvelder, A.C.W.M, Reliability based assessment of buildings under earthquakes due to gas extraction, Heron 2014 2/3.
  • Steenbergen, R.D.J.M., Vrouwenvelder, A.C.W.M. and Scholten, N., Veiligheidsfilosofie bij aardbevingsbelasting, Veiligheid en rekenwaarden belastingen en sterkte bij aardbevingen, Cement 01/2015.
  • Scholten, N.P.M., Vrouwenvelder, A.C.W.M. and Steenbergen, R.D.J.M., Gas extraction and necessary earthquake regulations, Cobra 2015.

Links to websites with additional information on the Groningen field and induced earthquakes 
Information on the registration of induced events can be found on the website of the Royal Netherlands Meteorological Institute (KNMI). The namplatform site presents the most recent information on the Groningen field from NAM, the operator. The Groningen Ground Movement (Groninger bodembeweging) lobby has built its own portal containing information on the gas field and induced seismicity. Since early 2015, homes have started being reinforced to improve their safety, as well as their occupants’ quality of life and the economy in general. The state, provincial and municipal authorities have appointed a National Groningen Coordinator to ensure that these operations proceed promptly and effectively. The Dutch Practical Guideline (Nederlandse Praktijkrichtlijn = NPR) on earthquake-proof construction can be found on the NEN website.