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SUMMARY:Earthquake ground-motion assessment and rupture behaviours of indu
 ced seismicity from deep geothermal production - Joanna Holmgren\, Univers
 ity of Bristol
DTSTART:20220518T150000Z
DTEND:20220518T160000Z
UID:TALK173159@talks.cam.ac.uk
CONTACT:Tom Winder
DESCRIPTION:With UK’s net-zero carbon emissions goal for 2050\, geotherm
 al energy has become a promising renewable energy source with its low carb
 on footprint. In 2020\, it stood for 4.5% of UK’s renewable energy\, and
  there are several geothermal projects planned for the near future. Howeve
 r\, one of the risks associated with geothermal production is induced seis
 micity. Although small microseismic events are natural at geothermal sites
 \, a few recent cases of larger earthquakes overseas have alarmed the publ
 ic\, caused damage\, and paused or halted the energy development. Thus\, a
 s UK is developing its geothermal sites\, it is important to analyse the f
 irst earthquakes available from each location to better understand how the
  regions respond to ground motions and how the earthquakes behave.\n\nUsin
 g a local Raspberry Shakes seismic network\, we examined the induced earth
 quakes from the United Downs geothermal site in Cornwall\, UK\, and found 
 that the region experiences more high-frequency content than expected base
 d on relevant models. We also concluded that low-cost Raspberry Shakes are
  a suitable alternative for preliminary seismic hazard analysis in regions
  lacking seismic networks. Additionally\, we investigated the first induce
 d earthquakes from the Helsinki\, Finland\, deep geothermal site to get a 
 closer look at the rupture behaviour of the earthquakes\, identifying clea
 r rupture directivity and complex behaviour similar to larger\, natural ea
 rthquakes.
LOCATION:ONLINE - Details to be sent by email
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