Kuvaus
In June and July 2018 St1 Deep Heat Oy (ST1DH) performed hydraulic stimulation between 6km and 7 km depth beneath the Aalto University campus, in Otaniemi, Espoo, Finland, to
establish an Enhanced Geothermal System (EGS) doublet for district heating. The
remarkable depth of the stimulation can be attributed to the shallow geothermal gradient
intrinsic to the geologically stable Fennoscandian shield. The Institute of Seismology,
University of Helsinki (ISUH) monitored the stimulation stage using a network of surface
seismic stations and geophones.
The EGS-site is located near the center of Greater Helsinki in Southern Finland; a region that
has low natural seismicity and shallow to non-existent sedimentary cover. Many sensitive
installations and other infrastructure are situated within few kilometers of the site. These
provide unique challenges, requirements but also opportunities for the seismic monitoring of
the project.
We present the various seismic networks that were used in monitoring the site, as well as the
induced seismicity that was observed during and after the stimulation. We will also briefly
discuss the public response to the induced seismicity with focus on the largest event. For
background, the natural seismicity of Southern Finland is briefly covered, as well as the so called Traffic Light System (TLS) that was used during the stimulation to manage the induced
seismicity
Aikajakso | 15 lokak. 2019 |
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Tapahtuman otsikko | The 50th Nordic Seminar in Seismology |
Tapahtuman tyyppi | Seminaari |
Sijainti | Uppsala, RuotsiNäytä kartalla |
Tunnustuksen arvo | Kansainvälinen |
Asiakirjat ja linkit
Tähän liittyvä sisältö
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Aktiviteetit
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Geoterminen energia ja maanjäristykset Etelä-Suomessa
Aktiviteetti: Puhe- tai esitystyypit › Kutsuesitelmä
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The 50th Nordic Seminar in Seismology
Aktiviteetti: Tapahtumaan osallistumisen ja tapahtuman järjestämisen tyypit › Konferensseihin, kursseille ja seminaareihin osallistuminen ja näiden järjestäminen
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Tutkimustuotos
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Using array‐derived rotational motion to obtain local wave propagation properties from earthquakes induced by the 2018 geothermal stimulation in Finland
Tutkimustuotos: Artikkelijulkaisu › Artikkeli › Tieteellinen › vertaisarvioitu
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Design and implementation of a traffic light system for deep geothermal well stimulation in Finland
Tutkimustuotos: Artikkelijulkaisu › Artikkeli › Tieteellinen › vertaisarvioitu
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Evolving the Fennoscandian GMPEs (EVOGY)
Tutkimustuotos: Artikkeli kirjassa/raportissa/konferenssijulkaisussa › Kirjan luku tai artikkeli › Tieteellinen
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The 2018 Geothermal Reservoir Stimulation in Espoo/Helsinki, Southern Finland: Seismic Network Anatomy and Data Features
Tutkimustuotos: Artikkelijulkaisu › Artikkeli › Tieteellinen › vertaisarvioitu
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Lehtileikkeet
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Tietoaineistot