The investigation of the mechanical behaviour of active faults by means of downhole monitoring the physics of earthquakes and aseismic fault motion.

The instrument array included: pT gauges, optical strainmeter, 6 pcs electrical electrodes and a 3c accelerometer package.

6 ¾” borehole, 31 °C static temperature, max. depth 1001 m, still operating

Sept. 2002: successful installation on wireline and outside the cemented casing. Sensors in operation