Results 41 to 50 of about 151,377 (290)

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

Response of the mantle to flat slab evolution: Insights from local splitting beneath Peru [PDF]

, 2014
The dynamics of flat subduction, particularly the interaction between a flat slab and the overriding plate, are poorly understood. Here we study the (seismically) anisotropic properties and deformational regime of the mantle directly above the Peruvian ...
Barazangi, Bird, Bowman, Cahill, Caroline M. Eakin, Christensen, Coney, Couch, Crampin, Cristóbal Condori, Dickinson, Eakin, Espurt, Evans, Faccenda, Feng, Gripp, Hampel, Hampel, Hayes, Healy, Henry, Hernando Tavera, Hilairet, Humphreys, James, Jung, Jung, Jung, Karato, Katayama, Kneller, Kneller, Lara S. Wagner, Lloyd, Long, Long, Ma, MacDougall, Maureen D. Long, Nakajima, PeruSE, Phillips, Porter, Ramos, Rosenbaum, Silver, Silver, Susan L. Beck, Wagner, Wagner, Woods, Wüstefeld   +52 more
core   +2 more sources

Shear-Wave Splitting and Mantle Flow Beneath the Colorado Plateau and its Boundary with the Great Basin [PDF]

, 2008
Shear-wave splitting measurements from SKS and SKKS phases show fast polarization azimuths that are subparallel to North American absolute plate motion within the central Rio Grande Rift (RGR) and Colorado Plateau (CP) through to the western rim of the ...
Aster, Richard, Baldridge, W. Scott, Grand, Stephen P., Ni, James F., Sandvol, Eric, Sine, Christopher, Wang, Xinling L., Wilson, David   +7 more
core   +1 more source

Lowermost Mantle Anisotropy Beneath Africa From Differential SKS‐SKKS Shear‐Wave Splitting

Journal of Geophysical Research: Solid Earth, 2019
We investigate seismic anisotropy in the lowermost mantle in the vicinity of the African large low shear velocity province (LLSVP) using observations of differential SKS‐SKKS shear‐wave splitting.
M. Reiss, M. Long, N. Creasy
semanticscholar   +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

The Hudson Bay Lithospheric Experiment (HuBLE) : Insights into Precambrian Plate Tectonics and the Development of Mantle Keels [PDF]

, 2015
The UK component of HuBLE was supported by Natural Environment Research Council (NERC) grant NE/F007337/1, with financial and logistical support from the Geological Survey of Canada, Canada–Nunavut Geoscience Office, SEIS-UK (the seismic node of NERC ...
Bastow, I. D., Darbyshire, F. A., Eaton, D. W., Helffrich, G., Kendall, J.-M., Pawlak, A. E., Snyder, D. B., Thompson, D. A., Wookey, J.   +8 more
core   +2 more sources

The Role of Variable Slab Dip in Driving Mantle Flow at the Eastern Edge of the Alaskan Subduction Margin: Insights From Shear‐Wave Splitting

Geochemistry Geophysics Geosystems, 2019
Alaska provides an ideal tectonic setting for investigating the interaction between subduction and asthenospheric flow. Within the span of a few hundred kilometers along strike, the geometry of the subducting Pacific plate varies significantly and ...
C. Venereau, R. Martin‐Short, I. Bastow, R. M. Allen, R. Kounoudis   +4 more
semanticscholar   +1 more source

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

, 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