Physics of the Earth and Planetary Interiors 
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This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.Nonlinear dynamics of crustal blocks and faults and earthquake occurrences in the Transcaucasian region
Publication date: Available online 23 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Inessa Vorobieva, Alik Ismail-Zadeh, Alexander GorshkovAbstractThe Caucasus is a part of ongoing collision of the Arabian and Eurasian plates, where moderate to strong earthquakes caused significant losses of lives and livelihood in the past. To better understand seismic hazard in the region, we develop a model of block-and-fault dynamics for Transcaucasia, the largest part of the Caucasus to the south of the Greater Caucasus Mountains, to simulate regional earthquakes. The model structure is developed by employ...
Source: Physics of the Earth and Planetary Interiors - October 25, 2019 Category: Physics Source Type: research
Crustal and uppermost mantle structure across the Lower Yangtze region and its implications for the late Mesozoic magmatism and metallogenesis, eastern South China
We present here high-resolution seismic sections of crustal and uppermost mantle structure along two dense linear arrays across the Lower Yangtze region in the eastern South China Block (SCB). Our seismic images reveal two low-velocity anomalies (LVAs) in the uppermost mantle which we interpreted as relic (still cooling) mantle magma chambers ponding and underplating beneath the base of the crust in the areas of the Dexing porphyry copper deposits and the Cretaceous South Anhui granites. The Moho and LAB discontinuities imaged also exhibit deformation directly above the two mantle LVAs, which probably indicate local mantle...
Source: Physics of the Earth and Planetary Interiors - October 22, 2019 Category: Physics Source Type: research
The melt content of the low velocity layer in the eastern South China: Implications for the subduction process of the Western Pacific plate
Publication date: Available online 21 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Maining Ma, Xiaoya Zhou, Zhishuang Xu, Guohui Li, Yongbing Li, Yuanze ZhouAbstractThe low-velocity layer (LVL) atop the mantle transition zone involves diapiric segregating, melt upwelling, mantle mixing, magmatic eruption and the remnants. The lateral variations of the LVL could record the process of the subducting plates. The LVL beneath the eastern South China intensively affected by the subduction of Western Pacific plate since Mesozoic is imaged with observed P-wave triplications recorded by the dense Chine...
Source: Physics of the Earth and Planetary Interiors - October 22, 2019 Category: Physics Source Type: research
Gravimetric study of the shallow basaltic plumbing system of Tenerife, Canary Islands
Publication date: Available online 21 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): S. Sainz-Maza Aparicio, J. Martí, F.G. Montesinos, A. Borreguero Gómez, J. Pereda de Pablo, P. Vaquero Fernández, M. Calvo García-MarotoAbstractRecent studies on intraplate volcanic islands reveal that magma ascends sub-vertically through these volcanic edifices, following well-defined zones in the lithospheric mantle and oceanic crust, and occasionally suffering lateral propagation along rift zones when it reaches very shallow depths. Visualizing the internal structure of the shallowest part of such magma p...
Source: Physics of the Earth and Planetary Interiors - October 22, 2019 Category: Physics Source Type: research
Effects of Coulomb stress change on Mw ≥ 6 earthquakes in the Caucasus
Publication date: Available online 21 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Bahruz Ahadov, Shuanggen JinAbstractCoulomb stress variations may trigger earthquakes, while the incident of stress transfer mechanisms is not clear. In this paper, Coulomb stress changes are investigated related to the sequences of strong earthquakes in the Caucasus region, which followed the 1988 Mw6.8 in Spitak, the 1991 Mw6.9 in Racha and the 2000 Mw6.2 in Baku. Our results show that the mainshocks induced a variation in the stress field where most of the seismic events occurred. Coulomb stress increases 2...
Source: Physics of the Earth and Planetary Interiors - October 22, 2019 Category: Physics Source Type: research
Three-dimensional ground motion modelling in the Kachchh rift zone, Gujarat, India
Publication date: Available online 20 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Prantik Mandal, Kimiyuki AsanoAbstractThe strong motion dataset of the 6 April 2006 Bhuj aftershock of Mw5.5 from 16 three-component accelerograph stations are used here to perform a detailed ground motion modelling in the Kachchh rift basin. First, we estimate the 1-D velocity structure model down to the bedrock at 16 accelerograph sites, through the Genetic Algorithm inversion of strong motion waveforms. Then, a 3-D velocity structure model of the basin is constructed using the modelled 1-D velocity structure ...
Source: Physics of the Earth and Planetary Interiors - October 21, 2019 Category: Physics Source Type: research
Refined 3600 years palaeointensity curve for Mexico
Publication date: Available online 19 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Ahmed Nasser Mahgoub, Erick Juárez-Arriaga, Harald Böhnel, Linda R. Manzanilla, Ann CyphersAbstractOur knowledge of the Earth's magnetic field intensity changes over the past few thousand years is still limited because of the uneven spatial and temporal distribution of data, which also includes the Americas. The present study reports 41 new palaeointensity data covering the past 3600 years which, together with 38 previously published data of similar quality, are used to construct a palaeointensity secular va...
Source: Physics of the Earth and Planetary Interiors - October 20, 2019 Category: Physics Source Type: research
Evidence for an upwelling mantle plume beneath the Songliao Basin, Northeast China
Publication date: Available online 17 October 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Chuansong HeAbstractA mushroom-like low-velocity body (MLLVB) was defined by tomography beneath Northeast China, which may be linked to a vestige of the Mesozoic upwelling mantle plume. However, multiple lines of evidence indicate that the necessary condition of the upwelling is that the upwelling mantle plume has a temperature sufficiently higher than that of the surrounding mantle. The upwelling mantle plume cannot be defined only based on the low-velocity structure. To investigate this issue, I conducted comm...
Source: Physics of the Earth and Planetary Interiors - October 19, 2019 Category: Physics Source Type: research
Editorial Board
Publication date: October 2019Source: Physics of the Earth and Planetary Interiors, Volume 295Author(s): (Source: Physics of the Earth and Planetary Interiors)
Source: Physics of the Earth and Planetary Interiors - October 16, 2019 Category: Physics Source Type: research
2D kernel-based imaging of coda-Q space variations in the Gargano Promontory (Southern Italy)
Publication date: Available online 12 September 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Marilena Filippucci, Pezzo, Salvatore de Lorenzo, Andrea TallaricoAbstractCrustal seismic attenuation in the Gargano Promontory (Southern Italy) was inferred by analyzing coda waves of about one hundred small magnitude earthquakes recorded by the OTRIONS local seismic network. Coda attenuation Qc was computed using the Sato (1977) model, i.e. the assumption of single back-scattering, at different lapse times and at different frequencies. Average Qc is comparable with the same quantity measured in the adjacent ...
Source: Physics of the Earth and Planetary Interiors - September 13, 2019 Category: Physics Source Type: research
Assessment of heterogeneities of the shallow crust from geophysical logging in the Koyna-Warna region, Deccan Volcanic Province, India
Publication date: Available online 10 September 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): D. Gopinadh, N. Satyavani, Kusumita Arora, M. Srihari Rao, K.N.S.S.S. Srinivas, Y. Srinu, P. Sai Vijay Kumar, H.V.S. SatyanarayanaAbstractAnalysis and comparison of geophysical logs from seven exploratory boreholes of 1–1.5 km depth in the Koyna-Warna region of India illustrate variations in physical properties and structural characteristics of the basalts and underlying granite-gneiss basement in and around the seismogenic zone. In the north, south of the Koyna reservoir, densities are higher, gamma value...
Source: Physics of the Earth and Planetary Interiors - September 11, 2019 Category: Physics Source Type: research
GeoVReality: A computational interactive virtual reality visualization framework and workflow for geophysical research
We present a new interactive computational virtual reality (VR) visualization framework for geophysical big data and models for the development of immersive collaborative virtual reality applications with a focus on targeted processing and interaction of big data. The framework includes a high-performance scalable persistent storage solution for the spatial analysis of Geospatial Information System (GIS), which uses an engine based on efficient in-memory computing. To more effectively visualize and interact in a VR environment, a machine learning algorithm library is used for compressing and extracting visual data. The fra...
Source: Physics of the Earth and Planetary Interiors - September 11, 2019 Category: Physics Source Type: research
New normal mode constraints on bulk inner core velocities and density
Publication date: Available online 6 September 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Alexander J.S. Robson, Barbara RomanowiczAbstractInner core elastic parameters Vp, Vs and density (ρ) inform both experimental and theoretical studies of inner core composition and potential light element candidates. Meanwhile, constraints on the density jump at the inner core boundary offer much-needed observational insight into the processes powering the geodynamo. Thus, obtaining accurate observational constraints on the elastic structure of the inner core is key to gaining better understanding of its compo...
Source: Physics of the Earth and Planetary Interiors - September 7, 2019 Category: Physics Source Type: research
Mapping P-wave azimuthal anisotropy of the New Madrid seismic zone
Publication date: Available online 29 August 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): Zewei Wang, Dapeng ZhaoAbstractWe determine a detailed tomographic model of 3-D P-wave azimuthal anisotropy in the crust and upper mantle beneath the New Madrid seismic zone (NMSZ) using a large number of high-quality arrival-time data of 877 local earthquakes and relative travel-time data of 1511 teleseismic events recorded at 62 USArray stations. The tomographic inversion is conducted by using a limit-memory Broyden–Fletcher–Goldfarb–Shanno algorithm for bound constrained optimization. Because damping reg...
Source: Physics of the Earth and Planetary Interiors - August 31, 2019 Category: Physics Source Type: research
Toward a Boot Strap Hypothesis of Plate Tectonics: Feedbacks Between Plates, The Asthenosphere, and The Wavelength of Mantle Convection
Publication date: Available online 24 August 2019Source: Physics of the Earth and Planetary InteriorsAuthor(s): A. Lenardic, M. Weller, T. Höink, J. SealesAbstractThe solid Earth system is characterized by plate tectonics, a low viscosity zone beneath plates (the asthenosphere), and long wavelength flow in the convecting mantle. We use suites of numerical experiments to show: 1) How long wavelength flow and the operation of plate tectonics can generate and maintain an asthenosphere, and 2) How an asthenosphere can maintain long wavelength flow and plate tectonics. Plate subduction generates a sub-adiabatic temperature gra...
Source: Physics of the Earth and Planetary Interiors - August 25, 2019 Category: Physics Source Type: research
