Results 41 to 50 of about 48,351 (153)

Comment on the report "Operational Earthquake Forecasting" by the International Commission on Earthquake Forecasting for Civil Protection

open access: yesAnnals of Geophysics, 2012
<p>The recently published report Operational Earthquake Forecasting: State of Knowledge and Guidelines for Utilization by the International Commission on Earthquake Forecasting for Civil Protection (ICEF) presupposes that there is no method for the
Stuart Crampin
doaj   +1 more source

Shear wave splitting in SE Brazil: an effect of active or fossil upper mantle flow, or both? [PDF]

open access: yes, 2003
International audienceWe investigated the structure of the upper mantle beneath southeastern Brazil using teleseismic shear wave splitting measurements. Measurements were performed on seismic data recorded in the Ribeira and Brasilia Neoproterozoic belts,
Assumpçao, Marcelo   +4 more
core   +2 more sources

Crust-mantle decoupling revealed by seismic velocity anisotropy beneath Syowa Station, Antarctica

open access: yesAntarctic Record, 1997
We analyzed shear wave splittings in the crust beneath Syowa Station, using Moho converted Ps waves. Three set of receiver functions and stacked receiver functions from Tonga events are analyzed.
Atsuki Kubo, Masaki Kanao
doaj   +1 more source

Time Varying Crustal Anisotropy at Whakaari/White Island Volcano

open access: yesGeophysical Research Letters
Whakaari/White Island has been the most active New Zealand volcano in the 21st century, producing small phreatic and phreatomagmatic eruptions, which are hard to predict.
D. Y. Mengesha   +3 more
doaj   +1 more source

Small Shear Wave Splitting Delays Suggest Weak Anisotropy in Cratonic Mantle Lithosphere

open access: yesGeophysical Research Letters, 2021
We use splitting in core‐refracted teleseismic shear waves (SKS, PKS, and similar) to investigate anisotropic properties of the upper mantle beneath the Superior craton in eastern North America and the Yilgarn craton in Western Australia.
Xiaoran Chen, Vadim Levin, Huaiyu Yuan
doaj   +1 more source

Upper mantle anisotropy beneath the African IRIS and Geoscope stations [PDF]

open access: yes, 2001
International audienceUpper mantle anisotropy beneath the African IRIS and Geoscope stations is investigated through the measurements of splitting of teleseismic shear waves such as SKS, SKKS and PKS phases.
Barruol, Guilhem, Ben Ismail, Walid
core   +4 more sources

Sub‐slab anisotropy beneath the Sumatra and circum‐Pacific subduction zones from source‐side shear wave splitting observations

open access: yesGeochemistry, Geophysics, Geosystems, 2014
Understanding the dynamics of subduction is critical to our overall understanding of plate tectonics and the solid Earth system. Observations of seismic anisotropy can yield constraints on deformation patterns in the mantle surrounding subducting slabs ...
Colton Lynner, Maureen D. Long
doaj   +1 more source

Classification of Teleseismic Shear Wave Splitting Measurements: A Convolutional Neural Network Approach

open access: yesGeophysical Research Letters, 2022
Shear wave splitting (SWS) analysis is widely used to provide critical constraints on crustal and mantle structure and dynamic models. In order to obtain reliable splitting measurements, an essential step is to visually verify all the measurements to ...
Yanwei Zhang, Stephen S. Gao
doaj   +1 more source

Low-Frequency Raman Modes and Electronic Excitations In Atomically Thin MoS2 Crystals [PDF]

open access: yes, 2012
Atomically thin MoS$_{2}$ crystals have been recognized as a quasi-2D semiconductor with remarkable physics properties. This letter reports our Raman scattering measurements on multilayer and monolayer MoS$_{2}$, especially in the low-frequency range ($
Cui, Xiaodong   +5 more
core   +3 more sources

Changes in seismic anisotropy at Ontake volcano: a tale of two eruptions

open access: yesSeismica
The interaction of faults, fractures, and hydromagmatic systems of volcanoes can lead to complicated stress patterns that vary over short spatial and temporal scales.
Michael Kendall   +6 more
doaj   +1 more source

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