Geophysics ERT borehole equipment, 2014-12-09 ERT doline installation, 31-01-2014 electrode in bentonite, 2014-01-31 trench for ERT, 2014-01-29 Electrode installation in limestone, 2014-01-24 8×8 cm stainless steel plate fixed by a 8 cm stainless steel piton 2014-01-24 Electrode dans le calcaire, 2014-01-24 Electrode, 2014-05-02 Electrode, 2014-01-24 Electrode, 2014-01-24 trapped rods, 2014-11-27 Drilling for piezometer, 2014-11-25 Tubes for borehole equipment 2014-12-09 Logging the borehole 2014-12-05 2014-11-25 Drilling a borehole Logging the borehole: Camera 2014-12-08 CG5 gravimeter in front of the doline, 2014 Arrival of the GWR iGrav#019 superconducting gravimeter 2014-11-26 Gravimetrist coating the new pillar, 2013-10-23 Gravimetrist at work, 2014-05-23 Gravimetrist at work 2014-01-24 CG5 gravimeter in the cave 2014-12-05 2014-11-27 Preparing the iGrav for He liquefaction 2014-11-26 Preparing the iGrav for He liquefaction 2014-11-27 Preparing the iGrav Installing the iGrav#019 R. Reineman (from GWR) and S. Castelein (ROB), 8 Dec. 2014 Absolute gravimeter FG5#202 iGrav#019 after installation surface lab during ERT installation, 2014-01-29 Surveying with DGPS, AW at work 2014-03-14