Results 21 to 30 of about 3,095 (118)

Poloidal‐ and Toroidal‐Mode Mantle Flows Underneath the Cascadia Subduction Zone

Geophysical Research Letters, 2020
Several hypotheses have been proposed to explain intriguing circular shear wave splitting patterns in the Pacific Northwest, invoking either 2‐D entrained flows or 3‐D return flows. Here, we present some hitherto unidentified, depth‐dependent anisotropic
Hejun Zhu, Xueyan Li, Jidong Yang, Robert J. Stern, David E. Lumley   +4 more
doaj   +1 more source

Shear wave splitting of the 2018 Lombok earthquake aftershock area, Indonesia

Geoscience Letters, 2023
Lombok is one of the islands in the transitional zone from the Sunda Arc to the Banda Arc, Indonesia. In the mid-2018, the island of Lombok was shaken by a series of strong earthquakes, started with a moment magnitude (Mw) 6.4 earthquake on July 29, 2018
Annisa Trisnia Sasmi, Andri Dian Nugraha, Muzli Muzli, Sri Widiyantoro, Syuhada Syuhada, Faiz Muttaqy, Zulfakriza Zulfakriza, Shengji Wei, Awali Priyono, Haunan Afif, Pepen Supendi, Yayan Mi’rojul Husni, Billy S. Prabowo, Achmad Fajar Narotama Sarjan   +13 more
doaj   +1 more source

Crack Features and Shear-Wave Splitting Associated with Fracture Extension during Hydraulic Stimulation of the Geothermal Reservoir in Soultz-sous-Forêts

Oil & Gas Science and Technology, 2016
The recent tomography results obtained within the scope of the Enhanced Geothermal System (EGS) European Soultz project led us to revisit the meso-fracturing properties of Soultz test site.
Adelinet M., Dorbath C., Calò M., Dorbath L., Le Ravalec M.   +4 more
doaj   +1 more source

Upper‐Mantle Anisotropy and Dynamics Beneath Northeast Asia: Insight From SKS and Local S Splitting Analysis

Geochemistry, Geophysics, Geosystems, 2020
Tectonics in Northeast Asia are characterized as the deep subduction of the Pacific Plate and the induced volcanism in Northeast China. Seismic anisotropy due to deformations is essential for understanding the mantle dynamics.
Yajing Bi, Zhouchuan Huang, Haibo Wang, Hanting Wu   +3 more
doaj   +1 more source

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

Annals 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

Time Varying Crustal Anisotropy at Whakaari/White Island Volcano

Geophysical 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, M. K. Savage, A. D. Jolly, C. J. Ebinger   +3 more
doaj   +1 more source

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

Antarctic 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

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

Geophysical 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

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

Geochemistry, 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

Geophysical 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