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Three-dimensional shear wave velocity structure revealed with ambient noise tomography in the Parkfield, California region
Publication date: Available online 16 May 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Xiangfang Zeng, Clifford ThurberAbstractKnowledge of the shear wave velocity structure in the Parkfield, California region is a key factor for obtaining accurate earthquake locations and improving wave propagation simulations, but it has been poorly resolved in previous studies. We have conducted an ambient noise tomography study using continuous waveform data from available seismic stations, and higher resolution was achieved. The shear wave velocity structure in the crust was inverted from Rayleigh wave dispersion...
Source: Physics of the Earth and Planetary Interiors - May 16, 2019 Category: Physics Source Type: research

Seismic imaging the D″ region beneath the Central Atlantic
Publication date: Available online 16 May 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Yuwei Li, Meghan S. Miller, Daoyuan SunAbstractThe lowermost mantle beneath the central Atlantic is bounded by the western edge of African Large Low Shear Wave Province (LLSVP) and a high-velocity region beneath the eastern Americas, which is attributed to the accumulated subducted slab material at the core-mantle boundary (CMB). Data recorded at broadband seismic arrays in western Europe and Morocco allow us to investigate the detailed structure beneath the Central Atlantic, which provides an important constraint o...
Source: Physics of the Earth and Planetary Interiors - May 16, 2019 Category: Physics Source Type: research

Selenophysical parameter inversion in the Lunar Southern Hemisphere Highland based on mutant particle swarm optimization
Publication date: Available online 14 May 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Zhen Zhong, Jianguo Yan, Shuanggen Jin, Menghua Zhu, J. Alexis P. Rodriguez, Huaqiang Zhu, Yi LiAbstractSelenophysical parameters can be estimated based on admittance between gravity and topography, especially high-precision GRAIL gravity and LOLA topography data. These parameters include load ratio between subsurface and surface loads, crustal thickness, crustal density, and effective elastic thickness. Considering non-negligible membrane stress, the lunar lithosphere is best modeled as a thin and elastic spherical...
Source: Physics of the Earth and Planetary Interiors - May 15, 2019 Category: Physics Source Type: research

Editorial Board
Publication date: June 2019Source: Physics of the Earth and Planetary Interiors, Volume 291Author(s): (Source: Physics of the Earth and Planetary Interiors)
Source: Physics of the Earth and Planetary Interiors - May 10, 2019 Category: Physics Source Type: research

Imaging Yellowstone magmatic system by the joint Gramian inversion of gravity and magnetotelluric data
Publication date: Available online 8 May 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Michael Jorgensen, Michael S. ZhdanovAbstractGravity and long-period magnetotelluric data are combined in a joint Gramian inversion to obtain structurally-similar 3D density and electrical resistivity models of the Yellowstone magmatic feeding system. Structural constraints are enforced through a correlation of the model gradients. Gravity data are sensitive to upper-crustal structure, whereas long-period magnetotelluric data are more sensitive to deeper structure. By combining these complementary data, the jointly i...
Source: Physics of the Earth and Planetary Interiors - May 10, 2019 Category: Physics Source Type: research