Results 91 to 100 of about 204 (113)

Seismological support for the metastable superplume model, sharp features, and phase changes within the lower mantle. [PDF]

Proc Natl Acad Sci U S A, 2007
Sun D, Tan E, Helmberger D, Gurnis M.
europepmc   +1 more source

Temperature profile in the lowermost mantle from seismological and mineral physics joint modeling. [PDF]

Proc Natl Acad Sci U S A, 2009
Kawai K, Tsuchiya T.
europepmc   +1 more source

Seismic low-velocity equatorial torus in the Earth's outer core: Evidence from the late-coda correlation wavefield. [PDF]

Sci Adv
Ma X, Tkalčić H.
europepmc   +1 more source

ULVZ, Ultra-Low Velocity Zone

Ed J. Garnero, M. Thorne
core   +2 more sources

Mapping structures on the core–mantle boundary using Sdiff postcursors: Part II. Application to the Hawaiian ULVZ [PDF]

Geophysical Journal International, 2023
SUMMARY We present a new data set of nearly 100 earthquakes which show clear evidence of the Hawaiian ultra-low velocity zone (ULVZ) in the S core-diffracted phase (Sdiff), representing the most comprehensive Sdiff data set of a ULVZ to date.
Thomas Bodin, Sanne Cottaar, Carl Martin
exaly   +4 more sources

A high-resolution map of Hawaiian ULVZ morphology from ScS phases [PDF]

Earth and Planetary Science Letters, 2021
We use core reflected ScS waves sensitive to a broad region of the core-mantle boundary beneath Hawaii to create the first high-resolution map of the Hawaiian ultralow-velocity zone (ULVZ).
Sima Mousavi, Sanne Cottaar, Zhi Li
exaly   +3 more sources

Historical Interstation Pattern Referencing (HIPR): An Application to PcP Waves Recorded in the Antarctic for ULVZ Imaging

Journal of Geophysical Research: Solid Earth, 2021
Much of our knowledge on deep Earth structure is based on detailed analyses of seismic waveforms that often have small amplitude arrivals on seismograms; therefore, stacking is essential to obtain reliable signals above the noise level.
Samantha Hansen, Edward J. Garnero, Sebastian Rost   +2 more
exaly   +2 more sources

Seismic Observation of a New ULVZ Beneath the Southern Pacific [PDF]

Journal of Geophysical Research: Solid Earth
We present new observations of core‐diffracted shear waves which contain anomalous waveforms sampling the lowermost mantle beneath the southern Pacific region.
Sanne Cottaar, Zhi Li, Carl Martin
exaly   +4 more sources

Detection of a ULVZ in the Central Pacific using high frequency Sdiff postcursors

Earth and Planetary Science Letters
In recent decades, ultra-low velocity zones (ULVZs) – thin patches of strongly reduced seismic velocity atop the core-mantle boundary (CMB) – have been inferred from observations of a variety of seismic phases.
Sanne Cottaar, Carl Martin, Stuart Russell   +2 more
exaly   +1 more source