Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region

DOI10.1126/SCIENCE.ABA8972zbMATH Open1478.86009arXiv2007.09485OpenAlexW3100554531WikidataQ96301671 ScholiaQ96301671MaRDI QIDQ5023379

Author name not available (Why is that?)

Publication date: 21 January 2022

Published in: (Search for Journal in Brave)

Abstract: Scattering of seismic waves can reveal subsurface structures but usually in a piecemeal way focused on specific target areas. We used a manifold learning algorithm called "the Sequencer" to simultaneously analyze thousands of seismograms of waves diffracting along the core-mantle boundary and obtain a panoptic view of scattering across the Pacific region. In nearly half of the diffracting waveforms, we detected seismic waves scattered by three-dimensional structures near the core-mantle boundary. The prevalence of these scattered arrivals shows that the region hosts pervasive lateral heterogeneity. Our analysis revealed loud signals due to a plume root beneath Hawaii and a previously unrecognized ultralow-velocity zone beneath the Marquesas Islands. These observations illustrate how approaches flexible enough to detect robust patterns with little to no user supervision can reveal distinctive insights into the deep Earth.

Full work available at URL: https://arxiv.org/abs/2007.09485

Mathematics Subject Classification ID

No records found.

This page was built for publication: Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region

Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q5023379)