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SUMMARY:Seismic interferometry of vehicle and train traffic: Case studies 
 from the USA and South Africa - Diego Quiros\, University of Cape Town
DTSTART:20241120T140000Z
DTEND:20241120T150000Z
UID:TALK222352@talks.cam.ac.uk
CONTACT:ChuanChuan Lu
DESCRIPTION:In the last two decades seismic interferometry has become an i
 mportant technique in a seismologist’s toolbox. Of the various applicati
 ons of seismic interferometry\, ambient noise tomography is perhaps the be
 st known. The main reason being that it uses the pervasive ambient seismic
  field generated by natural processes. On the other hand\, the anthropogen
 ic contribution to the ambient seismic field has received less attention\,
  although examples that use noise from traffic\, industrial sites and even
  buildings are present in the literature.\n\nIn this presentation\, I’ll
  discuss results from unpublished traffic noise datasets and explore previ
 ously published datasets. The focus of our analyses is the extraction of b
 ody waves\, and more specifically reflections generated by subsurface targ
 ets. These datasets include highway and train traffic noise recordings wit
 hin different environments. Different approaches are tested\, such as cros
 s-coherence interferometry and compared with standard cross-correlation re
 sults to determine the best method for each dataset. In addition\, differe
 nt binning and stacking methods are tested to determine which produces the
  most coherent body wave retrievals.\n\nThe case studies included in the p
 resentation are fairly varied\, for example we will look at a fairly recen
 t deployment in South Africa which recorded train traffic above a railroad
  tunnel\, another example which focused solely in vehicle traffic in the N
 ortheastern US\, and a couple of examples focusing in train traffic in New
  Mexico.
LOCATION:Wolfson Lecture Theatre
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