Results 11 to 20 of about 1,574 (185)

Evidence of reactivation of a hydrothermal system from seismic anisotropy changes [PDF]

Nature Communications, 2019
In this study, the authors monitor a hydrothermal fluid surge through seismic anisotropy changes at the Hakone volcanic field, Japan. The authors find the anisotropy changes to be set off by the seismic waves of the 2011 Tohoku-Oki earthquake, that ...
Maria Saade, Kohtaro Araragi, Jean Paul Montagner, Edouard Kaminski, Philippe Roux, Yosuke Aoki, Florent Brenguier   +6 more
doaj   +2 more sources

Mantle deformation records fossil convergent upwelling at Perm Anomaly [PDF]

Nature Communications
How low-velocity anomalies in the lower mantle influence convective flow, and their broader role in mantle dynamics, remain a topic of ongoing debate. One such anomaly, located roughly beneath the Russian city of Perm, is exceptionally well sampled by ...
Jonathan Wolf, Mingming Li, Barbara Romanowicz   +2 more
doaj   +2 more sources

Modeling of Seismic Anisotropy Observations Reveals Plausible Lowermost Mantle Flow Directions Beneath Siberia

Geochemistry, Geophysics, Geosystems, 2021
Observations of seismic anisotropy just above the core‐mantle boundary are a powerful way to understand the dynamics of the lowermost mantle. Here we present models of seismic anisotropy in the lowermost mantle beneath Siberia based on new and previously
Neala Creasy, Angelo Pisconti, Maureen D. Long, Christine Thomas   +3 more
doaj   +2 more sources

Reservoir stress path and induced seismic anisotropy: results from linking coupled fluid-flow/geomechanical simulation with seismic modelling

Petroleum Science, 2016
We present a workflow linking coupled fluid-flow and geomechanical simulation with seismic modelling to predict seismic anisotropy induced by non-hydrostatic stress changes.
D. A. Angus, Q. J. Fisher, J. M. Segura, J. P. Verdon, J.-M. Kendall, M. Dutko, A. J. L. Crook   +6 more
doaj   +3 more sources

Depth-dependent anisotropy in the Earth’s inner core linked to chemical stratification [PDF]

Nature Communications
Seismic anisotropy in the Earth’s inner core (IC), including the heterogeneous, depth-dependent anisotropy structure, is a well-documented yet poorly understood feature plausibly related to the alignment of iron alloy crystals. Here, we report the effect
Efim Kolesnikov, Xiang Li, Susanne C. Müller, Arno Rohrbach, Stephan Klemme, Jasper Berndt, Hanns-Peter Liermann, Carmen Sanchez-Valle, Ilya Kupenko   +8 more
doaj   +2 more sources

Seismic characterization of inland and coastal sabkhas using V P , V S , seismic anisotropy, and attenuation [PDF]

Scientific Reports
Sabkhas represent abundant topographic environments along the Arabian Gulf and are increasingly relevant to hydrocarbon exploration and urban development.
Ahmed Eleslambouly, Mohammed Y. Ali, Fateh Bouchaala, Ammar El-Husseiny, Abdullatif Al-Shuhail, Sherif M. Hanafy, Jun Matsushima   +6 more
doaj   +2 more sources

Major methods of seismic anisotropy

Earthquake Research Advances
Seismic anisotropy reveals that seismic wave velocity, amplitude, and other physical properties show variations in different directions, which can be divided into lattice-preferred orientation (LPO) and shape-preferred orientation (SPO) according to its ...
Xinai Zhao, Jing Wu
doaj   +3 more sources

Quantitative Seismic Interpretation of Reservoir Parameters and Elastic Anisotropy Based on Rock Physics Model and Neural Network Framework in the Shale Oil Reservoir of the Qianjiang Formation, Jianghan Basin, China

Energies, 2022
Quantitative estimates of reservoir parameters and elastic anisotropy using seismic methods is essential for characterizing shale oil reservoirs.
Zhiqi Guo, Tao Zhang, Cai Liu, Xiwu Liu, Yuwei Liu   +4 more
doaj   +1 more source

Seismic Anisotropy in Subduction Zones: Evaluating the Role of Chloritoid

Frontiers in Earth Science, 2021
Subduction zones are often characterized by the presence of strong trench-parallel seismic anisotropy and large delay times. Hydrous minerals, owing to their large elastic anisotropy and strong lattice preferred orientations (LPOs), are often invoked to ...
Jungjin Lee, Mainak Mookherjee, Taehwan Kim, Haemyeong Jung, Reiner Klemd   +4 more
doaj   +1 more source

Global Compilation of Deep Mantle Anisotropy Observations and Possible Correlation With Low Velocity Provinces

Geochemistry, Geophysics, Geosystems, 2023
We compile and make publicly available a global digital database of body wave observations of seismic anisotropy in the D′′ layer, grouped using the method used to analyze deep mantle anisotropy. Using this database, we examine the global distribution of
Jonathan Wolf, Maureen D. Long, Mingming Li, Edward Garnero   +3 more
doaj   +1 more source