气候变化领域集成服务门户(CCPortal): Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region

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DOI	10.1126/science.aba8972
	Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region
	Kim D.; Lekić V.; Ménard B.; Baron D.; Taghizadeh-Popp M.
发表日期	2020
ISSN	0036-8075
起始页码	1223
结束页码	1228
卷号	368 期号:6496
英文摘要	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. © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works
关键词	algorithm arrival time core-mantle boundary heterogeneity learning seismic wave seismograph three-dimensional modeling wave scattering wave velocity waveform analysis Hawaii [United States]Marquesas Islands Pacific Ocean United States algorithm article Hawaii manifold learning plume prevalence waveform
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133434
推荐引用方式 GB/T 7714	Kim D.,Lekić V.,Ménard B.,et al. Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region[J]. Science,2020,368(6496).
APA	Kim D.,Lekić V.,Ménard B.,Baron D.,&Taghizadeh-Popp M..(2020).Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region.,368(6496).
MLA	Kim D.,et al."Sequencing seismograms: A panoptic view of scattering in the core-mantle boundary region".368.6496(2020).