The reason for the study was the earthquake in Huizinge on August 16, 2012. SSM has found that increased gas production since 2000 of about 20 up to 50 billion m3 per year has not only led to an increase in the number of earthquakes but also to an increased risk of severe earthquakes. The study of SSM shows that the number of earthquakes is not expected to decrease in the short term. Only with a very drastically reduction of the gas or even a stop, it is expected after several years virtually no perceptible earthquakes will occur in the Groningen gas field. SSM has determined that a reduction in the gas leads to a proportional reduction in the number of earthquakes. If the gas production from the Groningen gas field remains unchanged, there is 7 percent chance of an earthquake with greater strength than 3.9 on the Richter scale in the period 2013/2014.
The research is sent together with an advice letter to the Minister of Economic Affairs, including a letter from the NAM on current seismological insights into the Groningen gas field.