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Table 3 Absolute gravity determinations at the reference site GPK1

From: Monitoring of a geothermal reservoir by hybrid gravimetry; feasibility study applied to the Soultz-sous-Forêts and Rittershoffen sites in the Rhine graben

Date

Duration (hours)

Gravity (μGal)

Uncertainty (μGal)

22/10/2013

11

9 80 910 145.0

2.7

16/04/2013

5

9 80 910 145.3

2.1