Figure 2: A set of images showing details and examples of seismic stations deployment, including ocean-bottom seismometers (OBSs) recovery and the air-gun operation.

(a) An image showing the type and size of one of the temporary camps deployed during the TOMODEC experiment. (b) An example of an autonomous seismic stations deployed on permafrost, including the batteries used for power supply. Seismometers were buried as indicated in (c,e). The depth of each hole was controlled by permafrost conditions. The central hub of each seismic array was protected using tents as illustrated in (d). Since each seismometer was connected by cable to this hub, many thousands of metres of cable were used in the experiment. (f) An image illustrating the complex access of some of the autonomous seismic station. (g) Image of the bubble formed at the sea surface following an air gun shot from the ‘Hespérides’ vessel. (h) A picture illustrating the recovery of an OBS from inside of Port Foster.