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SUMMARY:Fibre-Optic Strain Sensing: A Game Changer for (Urban) Seismic Sur
 veying - Charlotte Krawczyk - GFZ Potsdam and Technical University Berlin.
DTSTART:20191030T160000Z
DTEND:20191030T170000Z
UID:TALK131293@talks.cam.ac.uk
CONTACT:Jenny Jenkins
DESCRIPTION:Natural hazard prediction and efficient crustal exploration be
 nefit from densely designed surveys. Seismological techniques provide grou
 nd-motion data\, while active seismics aims at structural imaging and incr
 easingly on physical properties determination. Dense networks exist on som
 e volcanoes and in exploration plays\, but not in urban areas where data a
 cquisition is more challenging.\nWe demonstrate that dynamic strain determ
 ination is now possible with conventional fibre- optic cables deployed for
  telecommunication. This is a new tool for earthquake location or for crus
 tal exploration using unexpected sources. Thereby\, this method provides k
 ey records for understanding subsurface dynamics\, especially in urban are
 as.\n\nRelevent References:\n1. Ajo-Franklin\, Jonathan B.\, et al. "Distr
 ibuted Acoustic Sensing Using Dark Fiber for Near-Surface Characterization
  and Broadband Seismic Event Detection." Scientific reports 9.1 (2019): 13
 28.\n2. Marra\, Giuseppe\, et al. "Ultrastable laser interferometry for ea
 rthquake detection with terrestrial and submarine cables." Science 361.640
 1 (2018): 486-490.\n3. Jousset\, Philippe\, et al. "Dynamic strain determi
 nation using fibre-optic cables allows imaging of seismological and struct
 ural features." Nature communications 9.1 (2018): 2509.\n
LOCATION:Marine/Wolfson Building lecture hall\, Bullard Labs.
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