Results 21 to 30 of about 204 (113)
ULVZ Distribution Database from 54 studies
, 2017 <p>We collect ULVZ location information from 54 seismic studies and then digitized these locations.</p> <p>Two ways to go from here: These locations data can be used in your new researches.
Shule Yu, Edward Garnero
core +1 more source
Ultralow-velocity zone geometries resolved by multi-dimensional waveform modeling [PDF]
, 2016 Ultra-low velocity zones (ULVZs) are thin patches of material with strongly reduced seismic wave speeds situated on top of the core-mantle boundary (CMB).
Rost, S +5 more
core +2 more sources
Seismic Imaging of Earth’s Core-Mantle Boundary using Diffracted Waves [PDF]
, 2022 Earth’s core-mantle boundary marks the transition from the rocky mantle to the liquid outer core and exhibits the most extreme velocity jump in the Earth’s radial seismic structure.
core +2 more sources
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.Abstract Silicate melt has been proposed to exist near the base of the mantle and has been invoked to explain seismic and electrical conductivity anomalies observed near the core‐mantle boundary; however, its presence and stability under lowermost‐mantle conditions remain uncertain.
Izumi Mashino +5 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract Dense sedimentary iron formations (IFs) subducted into the mantle during Earth's early history, may have descended to the core‐mantle boundary where they could exert strong control on its thermal and seismological properties. A key unanswered question is the extent to which IFs retain their oxidized character in the much more reducing mantle ...
Jemila A. Edmond +2 more
wiley +1 more source
Investigating ultra-low velocity zones in the southern hemisphere using an Antarctic dataset [PDF]
, 2020 Given limited seismic coverage of the lowermost mantle, less than one-fifth of the core-mantle boundary (CMB) has been surveyed for the presence of ultra-low velocity zones (ULVZs).
Carson, SE +4 more
core +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 5, May 2026.Abstract The Iceland Plume, a hot upwelling from the Earth's deep mantle, is thought to have caused high mantle temperatures beneath Iceland and its surroundings resulting in voluminous volcanism, from the North Atlantic Igneous Province at 60 Ma to the present.
Thomas A. J. Merry +5 more
wiley +1 more source
Global Presence and Absence of Ultra‐Low Velocity Zones as Seen by Sdiff Postcursors
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract The core‐mantle boundary (CMB) is a region of significant lateral heterogeneity. Two antipodal large low‐velocity provinces (LLVPs) dominate the lower mantle, while smaller but more extreme ultralow velocity zones (ULVZs) are scattered atop the CMB in a variety of morphologies.
J. R. Atkins, C. Martin, S. Cottaar
wiley +1 more source
Evaluating the Role of Iron-Rich (Mg,Fe)O in Ultralow Velocity Zones [PDF]
, 2019 The composition of ultralow velocity zones (ULVZs) remains an open question, despite advances in both seismology and experimental work. We investigate the hypothesis of iron-rich (Mg,Fe)O (magnesiowüstite) as a cause of ULVZ seismic signatures. We report
Dobrosavljevic, Vasilije V. +2 more
core +2 more sources
Decadal Stability of Multi‐Scale Core‐Mantle Boundary in Core‐Reflections of Repeating Earthquakes
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract Temporal changes near the core‐mantle boundary (CMB) would trigger insights into ongoing thermal and chemical interactions between the Earth's core and mantle. Here, we search for multidecadal temporal changes in the CMB topography and heterogeneity using waveform similarity analysis of core‐reflected phases (PcP, ScP, and ScS) from global ...
Tianyu Cui +5 more
wiley +1 more source