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DTSTAMP:20210916T132449Z
LOCATION:Louis Favre
DTSTART;TZID=Europe/Stockholm:20210706T120000
DTEND;TZID=Europe/Stockholm:20210706T123000
UID:submissions.pasc-conference.org_PASC21_sess118_msa342@linklings.com
SUMMARY:Global Seismic Tomography with Millions of Waveforms
DESCRIPTION:Minisymposium\n\nGlobal Seismic Tomography with Millions of Wa
 veforms\n\nTsekhmistrenko, Hosseini, Sigloch\n\nSeismic tomography is the 
 main tool for imaging the Earth's interior. Since the advent of this metho
 d, the internal structure of Earth has been vastly sampled and imaged at a
  variety of scales. Recent advances in seismic data acquisition, methodolo
 gy and computing power have drastically progressed tomographic models. How
 ever, the resolution of these models varies significantly depending on the
  data coverage, quality of the measurements and the inversion technique. H
 ere, we compare the mantle structures imaged by two recent, high-resolutio
 n tomography models: a global-scale model with ~13M measurements and a reg
 ional-scale model beneath the Western Indian Ocean with ~2.5M measurements
 . These models are generated using a linear inversion technique in which t
 he traveltime observations are linearly linked to the discretized earth mo
 del (as parameterized by an adaptive tetrahedral grid). We examine the imp
 acts of three factors on the resulting models: (1) data selection; (2) (da
 ta-driven) parameterization; and (3) regularization parameters. We will th
 en discuss how these parameters were selected to address different scienti
 fic questions.\n\nDomain: CS and Math, Solid Earth Dynamics
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