arrow-right Back to articles

The St1 monitoring network detected micro-vibration of 1,24 magnitudes

Water-stimulation of the boreholes is proceeding well at the Otaniemi site, where geothermal heat experts are working around the clock - leading water to a 6.4-km deep hole and monitoring with project’s underground geophones the micro-vibrations and the water flow they induce in the rock. 

The geophones in the bedrock in the Helsinki Metropolitan area, discovered this morning 1,24 magnitude micro-vibration in the depth of the bedrock. The effects of this magnitude of micro-vibration can’t be sensed at the ground level and do not cause a risk to humans or damage to structures. The Institute of Seismology has monitored 1 magnitude micro-vibration.  The differences in the measurement result is due to differences in measurement methods and equipment. The St1 equipment is tuned to detect water movements as accurately as possible. 

Inducing micro-vibration with stimulation is a key part of constructing a geothermal heat plant, as only it can be used to investigate the water flow required for heat production in the deep bedrock. St1 implements the stimulation in a highly controlled manner and according to the measures required by the authorities. We communicate all micro-vibrations exceeding 1.2 magnitudes at our project website.  

Geophone measurement results as well as up to date information can be monitored in real time online



The St1 monitoring network detected micro-vibration of 1,59 magnitudes



Related articles

Read all arrow-left