Seismic scatterers in the mid-lower mantle

S Kaneshima - Physics of the Earth and Planetary Interiors, 2016 - Elsevier
Recent seismological studies have revealed that rocks with significantly different elastic
properties are juxtaposed in the mid-lower mantle and often scatter seismic waves efficiently …

Insights into the origins and compositions of mantle plumes: A comparison of Galápagos and Hawai'i

KS Harpp, D Weis - Geochemistry, Geophysics, Geosystems, 2020 - Wiley Online Library
The Galápagos and Hawai'i archipelagos are formed by mantle plumes originating at the
large low shear velocity province (LLSVP) boundary. We report new high‐precision Pb, Sr …

Dynamical links between small-and large-scale mantle heterogeneity: Seismological evidence

DA Frost, EJ Garnero, S Rost - Earth and Planetary Science Letters, 2018 - Elsevier
Abstract We identify PKP• PKP scattered waves (also known as P′• P′) from earthquakes
recorded at small-aperture seismic arrays at distances less than 65°. P′• P′ energy travels …

[HTML][HTML] Most complicated lock pattern-based seismological signal framework for automated earthquake detection

SG Ozkaya, N Baygin, PD Barua, AR Singh… - International Journal of …, 2023 - Elsevier
Background Seismic signals record earthquakes and also noise from different sources. The
influence of noise makes it difficult to interpret seismograph signals correctly. This study …

Small‐Scale Scattering Heterogeneities in the Lowermost Mantle From a Global Analysis of PKP Precursors

X Ma, C Thomas - Journal of Geophysical Research: Solid …, 2020 - Wiley Online Library
Small‐scale heterogeneities contain important information on the composition of the Earth's
interior and are vital in understanding the dynamics and evolution of the Earth. Here we …

Improved Characterization of Ultralow‐Velocity Zones Through Advances in Bayesian Inversion of ScP Waveforms

S Pachhai, MS Thorne, S Rost - Journal of Geophysical …, 2023 - Wiley Online Library
Ultralow‐velocity zones (ULVZs) have been studied using a variety of seismic phases;
however, their physical origin is still poorly understood. Short period ScP waveforms are …

Sound velocities of the hydrous iron‐rich HH1‐phase: Implications for lower mantle seismic heterogeneities

L Liu, AQR Baron, E Ohtani, H Fukui… - Geophysical …, 2025 - Wiley Online Library
We investigated the compressional and shear velocities, VP and VS, of the HH1‐phase by
combining the inelastic x‐ray scattering and x‐ray diffraction experiments. In the pressure …

Scattering evidence for an ancient subducted slab using the unique raypath P* PKP

H Zhang, JE Vidale, W Wang - Geophysical Research Letters, 2024 - Wiley Online Library
We observe high‐frequency scatterers consistent with the interpretation of a tabular high‐
velocity structure under the Indian Ocean as an ancient subducted slab. We use a previously …

Small-scale heterogeneities at the bottom of the lower mantle beneath the northern Bay of Bengal and the northern Gulf of Mexico by the analysis of PKP precursors

Y Guan, B Zhang, Y Lü, J Hao, J Li… - Geophysical Journal …, 2024 - academic.oup.com
The bottom of the lower mantle is a key region for material circulation and energy exchange
within the Earth, with extremely high heterogeneity and complex dynamics processes …

On the frequency dependence and spatial coherence of PKP precursor amplitudes

N Mancinelli, P Shearer… - Journal of Geophysical …, 2016 - Wiley Online Library
Studies now agree that small‐scale (∼ 10 km) weak (∼ 0.1%) velocity perturbations
throughout the lowermost mantle generate the globally averaged amplitudes of 1 Hz …