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Table 1 Distribution of soil moisture sensors installed at different depths around each gravity station; some soil profiles are deployed at equal distances to the iGrav pillar (e.g. two profiles with 12.1 m distance at SCGW), in these cases the sensors are installed below different micro-topographic features (e.g. small hills or terrain depressions)

From: Environmental and anthropogenic gravity contributions at the Þeistareykir geothermal field, North Iceland

Gravity station

No. of sensors

No. of profiles

Profile distance to iGrav pillar [m]

Sensor depths [m]

SCGW

14

4

6.5, 7.5, 12.1, 12.1

0.1 (4×), 0.3 (4×), 0.5 (4×), 0.8 (2×)

SCGC

13

5

10.3, 11.9, 11.9, 13.4, 13.4

0.1 (5×), 0.3 (4×), 0.5 (3×), 0.8 (1×)

SCGE

13

4

8.1, 8.4, 11.4, 11.4

0.1 (4×), 0.3 (4×), 0.5 (3×), 0.6 (1×), 0.8 (1×)