imaging the upper mantle beneath turkey and surrounding regions

... This study includes two interdependent sections. The first section presents an analysis of Pn travel times to determine Pn velocity, Pn anisotropy and crustal thickness variations beneath Turkey and surroundings. Between 1999 and 2010, more than 50 000 Pn arrivals are compiled from 700 regional eart ...

... This study includes two interdependent sections. The first section presents an analysis of Pn travel times to determine Pn velocity, Pn anisotropy and crustal thickness variations beneath Turkey and surroundings. Between 1999 and 2010, more than 50 000 Pn arrivals are compiled from 700 regional eart ...

Elastic Wave Propagation in Anisotropic Media: Migration

... primary benefits of this technique are: 1) it allows for fast traveltime computation; 2) it makes possible an extremely rapid estimation of the interval elastic parameters; and 3) it provides physical insight into wave propagation in anisotropic media. Based on the forward modeling discussed above, ...

... primary benefits of this technique are: 1) it allows for fast traveltime computation; 2) it makes possible an extremely rapid estimation of the interval elastic parameters; and 3) it provides physical insight into wave propagation in anisotropic media. Based on the forward modeling discussed above, ...

Structure of the crust and uppermost mantle of Iceland from

... study as their main e¡ect would be to cause a consistent o¡set in the calculated gravity ¢eld. Since we are modelling gravity anomalies rather than the absolute gravity, such an o¡set would make little di¡erence to the crustal thickness variations we model as responsible for those anomalies. We assu ...

... study as their main e¡ect would be to cause a consistent o¡set in the calculated gravity ¢eld. Since we are modelling gravity anomalies rather than the absolute gravity, such an o¡set would make little di¡erence to the crustal thickness variations we model as responsible for those anomalies. We assu ...

The Tectonic Framework of the Sumatran Subduction Zone

... recently was perhaps best known to the world for its coffee, though perhaps not so much as Java, its neighbor to the east. For geologists, who learn largely from the past, it has been there that many important geologic processes have been studied and thus better understood. Some of these processes, ...

... recently was perhaps best known to the world for its coffee, though perhaps not so much as Java, its neighbor to the east. For geologists, who learn largely from the past, it has been there that many important geologic processes have been studied and thus better understood. Some of these processes, ...

Lithosphere structure underneath the Tibetan Plateau inferred from

... sensitive to shallow structures, elevation, geoid height and longwavelength heat flow variations are more sensitive to deep structures. Seismic data provide valuable information on both the geometry of crustal layers and the depth distribution of P-wave velocities. Geopotential, lithostatic and heat ...

... sensitive to shallow structures, elevation, geoid height and longwavelength heat flow variations are more sensitive to deep structures. Seismic data provide valuable information on both the geometry of crustal layers and the depth distribution of P-wave velocities. Geopotential, lithostatic and heat ...

Distinct crustal isostasy trends east and west of the Rocky Mountain

... measurements for a 3-D Vs model. At each location on a 0.2° grid, phase velocity and H/V ratio measurements between 8 and 100 s period and crust thickness determined in section 2.1 were used to invert for 1-D Vs models between 0 and 150 km depth. Outstanding depth resolution can be achieved in the c ...

... measurements for a 3-D Vs model. At each location on a 0.2° grid, phase velocity and H/V ratio measurements between 8 and 100 s period and crust thickness determined in section 2.1 were used to invert for 1-D Vs models between 0 and 150 km depth. Outstanding depth resolution can be achieved in the c ...

Crustal magma plumbing within a segment of the Mid

... tional model de¢ned on a grid with 1 km horizontal and 400 m vertical spacing. The inverse problem is regularized by minimizing the model roughness at each iteration and a stochastic penalty function. The decay length of the smoothing operator is set at 110% of the interval between the perturbationa ...

... tional model de¢ned on a grid with 1 km horizontal and 400 m vertical spacing. The inverse problem is regularized by minimizing the model roughness at each iteration and a stochastic penalty function. The decay length of the smoothing operator is set at 110% of the interval between the perturbationa ...

Goals, Objectives and Investigations for Venus Exploration: 2014

... Venus and Earth began as twins. Their sizes and densities are nearly identical and they stand out as being considerably more massive than other terrestrial planetary bodies. Yet the Venus that has been revealed through past exploration missions is hellishly hot, devoid of oceans, apparently lacking ...

... Venus and Earth began as twins. Their sizes and densities are nearly identical and they stand out as being considerably more massive than other terrestrial planetary bodies. Yet the Venus that has been revealed through past exploration missions is hellishly hot, devoid of oceans, apparently lacking ...

M. Koch

... => Used 700,000 P wave residuals from ISC bulletins to imagine lateral structure of the Earth’s mantle. Use of PcP- and PKP- phases by Karason, H., van der Hilst, R.D., 2001. Improving global tomography models of P-wavespeed. I. Incorporation of differential travel times for refracted and diffracted ...

... => Used 700,000 P wave residuals from ISC bulletins to imagine lateral structure of the Earth’s mantle. Use of PcP- and PKP- phases by Karason, H., van der Hilst, R.D., 2001. Improving global tomography models of P-wavespeed. I. Incorporation of differential travel times for refracted and diffracted ...

The seismic Travel Time Problem as applied to Tomography of the

... => Used 700,000 P wave residuals from ISC bulletins to imagine lateral structure of the Earth’s mantle. Use of PcP- and PKP- phases by Karason, H., van der Hilst, R.D., 2001. Improving global tomography models of P-wavespeed. I. Incorporation of differential travel times for refracted and diffracted ...

... => Used 700,000 P wave residuals from ISC bulletins to imagine lateral structure of the Earth’s mantle. Use of PcP- and PKP- phases by Karason, H., van der Hilst, R.D., 2001. Improving global tomography models of P-wavespeed. I. Incorporation of differential travel times for refracted and diffracted ...

Deep mantle heat flow and thermal evolution of the Earth`s core in

... to the solidus [Xie and Tackley, 2004a]. Composition is represented by the variable C, which varies from 0 (harzburgite) to 1 (basalt/eclogite). [10] The different phase changes in the olivine system and pyroxene-garnet system are implemented using the formulation described by Xie and Tackley [2004a ...

... to the solidus [Xie and Tackley, 2004a]. Composition is represented by the variable C, which varies from 0 (harzburgite) to 1 (basalt/eclogite). [10] The different phase changes in the olivine system and pyroxene-garnet system are implemented using the formulation described by Xie and Tackley [2004a ...

# Geodesy

Geodesy (/dʒiːˈɒdɨsi/), — also known as geodetics or geodetics engineering — a branch of applied mathematics and earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three-dimensional time-varying space. Geodesists also study geodynamical phenomena such as crustal motion, tides, and polar motion. For this they design global and national control networks, using space and terrestrial techniques while relying on datums and coordinate systems.