The finalization phase of St1's Otaniemi geothermal heat wells will be delayed by about a week

The previously announced heat well finishing phase has been delayed by about a week due to a broken tool. According to the current estimate, the work will be completed by the end of week 21.

Noise nuisance possible in the vicinity in the coming weeks

The effects of the measures are closely monitored in co-operation with the Institute of Seismology of the University of Helsinki. A monitoring system has been set up for the project, which will enable hydraulic tests and stimulation to be carried out in a very controlled manner - without endangering people or property. A measurement network installed deep in the rock is used to monitor both the flow of water and the micro-earthquakes that the work steps are likely to cause deep in the bedrock. Micro-earthquakes may cause momentary sounds on the ground in nearby areas. Sound waves can also resonate in windows and structures, but they do not pose a danger to people or damage structures. Potential micro-earthquakes can occur at different times of the day with hydraulic tests, possible counter-stimulation and preparatory work in progress between weeks 17-21.

We apologize for any noise nuisance caused by micro-earthquakes that may occur to residents in nearby areas during the finishing phase of the heat wells. Read the release about the start of the finalization phase here.

Further information:

St1 Oy, Matti Pentti, Director, Heat from the Ground, tel. +358 10 557 4119,

St1 Nordic Oy is a Nordic energy Group whose vision is to be the leading producer and seller of CO2-aware energy. The Group researches and develops economically viable, environmentally sustainable energy solutions. St1 focuses on fuels marketing activities, oil refining and renewable energy solutions such as waste-based advanced ethanol fuels and industrial wind power. The Group has 1300 St1 and Shell branded retail stations in Finland, Sweden and Norway. Headquartered in Helsinki, St1 employs currently 770 people.

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