School of GeoSciences

School of GeoSciences



I have recently completed my PhD in Seismic Interferometry, focussing on the application of Source-Receiver Interferometry (SRI) in Earthquake Seismology. Following a seismic event (e.g., an earthquake), SRI is a method that allows the seismic signals from that event to be redatumed to new measurement locations, even after all of the energy from that event has dissipated. This spatial and temporal redatuming of real earthquake energy has enabled the construction of virtual earthquake seismograms on seismometers that were deployed before or after an earthquake occurred. Thus, using the benefit of hindsight of earthquake magnitude and location estimates, seismometers can be deployed post-earthquake in more useful locations, and virtual earthquake seismograms can nevertheless be obtained (Curtis et al., 2012). We have developed and identified suitable, multi-scale SRI source and receiver geometries to construct these virtual earthquake seismograms, retrospectively, on USArray seismometers deployed across much of the United States (Entwistle et al., 2015). We have also improved SRI receiver integration by embedding seismometer arrays within 2-D spatial Voronoi cells, thereby reducing the effects of spatial irregularities caused by missing/inactive seismometers.

For a copy of my EGU 2015 Poster please download the following PDF

Publications

  • E. Entwistle, Curtis, A., Galetti, E., Baptie, B., Meles, G., 2015. Constructing new seismograms from old earthquakes: Retrospective seismology at multiple length scales, JGR (PDF)
  • A. Curtis, Behr, Y., Entwistle, E., Galetti., E., Towend, J., Bannister, S., 2012. The benefits of hindsight in observational science: Retrospective seismological observations, EPSL (PDF)
  • E. Entwistle, Curtis, A., Baptie, B., Meles, G. Successes and limitations of source-receiver interferometry in constructing virtual earthquake seismograms, in Prep.

Contact Information [Glen Etive]

Email: E.Entwistle@ed.ac.uk

Phone: +44(0)7875419001