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SUMMARY:Passive seismic monitoring of a geothermal project in the UK using
  nodal seismometers - Tom Kettlety (University of Oxford)
DTSTART:20260121T140000Z
DTEND:20260121T150000Z
UID:TALK243013@talks.cam.ac.uk
CONTACT:ChuanChuan Lu
DESCRIPTION:Recent advances in low-cost seismic node technology offer new 
 opportunities for high-resolution monitoring and characterisation of geoth
 ermal systems\, which are critical for the low-carbon energy transition. I
  will present results from a dense deployment of 450 seismic nodes at a ge
 othermal site in Cornwall\, United Kingdom during well stimulation activit
 ies. I’ll also discuss the benefits and challenges of working with the n
 odal system\, and discuss the methods and results used in the processing o
 f the data. Using automated workflows\, we detected and relocated 241 indu
 ced earthquakes with waveform-migration and double-difference methods\, en
 abling imaging of fault structures. Source parameters\, including moment m
 agnitudes\, stress drops\, fault radii\, and focal mechanisms\, were used 
 to infer fault stress conditions and fluid–fault interactions. To comple
 ment the earthquake-based analysis\, three-component beamforming of ambien
 t seismic noise was recently applied to estimate Rayleigh-wave velocities 
 and anisotropy\, providing an independent constraint on fracture orientati
 ons and permeability structure at depth. Our findings highlight the potent
 ial and flexibility of nodal array data for passive seismic monitoring of 
 induced seismicity.\n
LOCATION:Wolfson Lecture Theatre
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