The intended seismic risk from gas production is negligible for gas fields N05-A and N05-A-North, which thus fall in the lowest seismic risk category (SRA Cat. I). TNO and SSM endorse this assessment. The Tanzanite-Oost gas field has a probability of trembling of 19%, but on the basis of a more detailed analysis data is also classified in the lowest seismic risk category. Because of the low negligible seismic risk and the large distance to the Wadden (islands) and the mainland, no detrimental effects and damage as a result of soil vibration are expected from this gas production.