Bulletin of the Seismological Society of America, Vol. 76, No. 2, pp
... Both station delays and slowness distribution are quite similar to those computed earlier by Hearn (1984b). The major differences between the two sets of delays occur primarily in the Los Angeles and the Ventura basins. Differences of up to 0.4 sec exist. As tests of the tomographic method on the sa ...
... Both station delays and slowness distribution are quite similar to those computed earlier by Hearn (1984b). The major differences between the two sets of delays occur primarily in the Los Angeles and the Ventura basins. Differences of up to 0.4 sec exist. As tests of the tomographic method on the sa ...
Lithospheric layering in the North American craton
... How cratons—extremely stable continental areas of the Earth’s crust—formed and remained largely unchanged for more than 2,500 million years is much debated. Recent studies of seismic-wave receiver function data have detected a structural boundary under continental cratons at depths too shallow to be ...
... How cratons—extremely stable continental areas of the Earth’s crust—formed and remained largely unchanged for more than 2,500 million years is much debated. Recent studies of seismic-wave receiver function data have detected a structural boundary under continental cratons at depths too shallow to be ...
link to answer key. - Warren County Schools
... These are the 5 main layers in order from the surface to the center of the Earth. [4 pts.] inner core, outer core, mesosphere, asthenosphere, lithosphere mesosphere, asthenosphere, lithosphere, inner core, outer core lithosphere, asthenosphere, mesosphere, outer core, inner core asthenosphere, litho ...
... These are the 5 main layers in order from the surface to the center of the Earth. [4 pts.] inner core, outer core, mesosphere, asthenosphere, lithosphere mesosphere, asthenosphere, lithosphere, inner core, outer core lithosphere, asthenosphere, mesosphere, outer core, inner core asthenosphere, litho ...
Diverging Plates: The Underlying Story
... We have run many other models with different parameters. They allow us to verify the following general statements. (1) The driving force for convection is the lateral thermal gradients near the base of the lithosphere, generated by rifting in the plate. Stronger gradients will produce more vigorous ...
... We have run many other models with different parameters. They allow us to verify the following general statements. (1) The driving force for convection is the lateral thermal gradients near the base of the lithosphere, generated by rifting in the plate. Stronger gradients will produce more vigorous ...
The Science of Tsunamis
... recorded using modern seismographic equipment. As it shook the west coast of Sumatra, Indonesia, and proceeded along a fault line at the eastern edge of the Indian Ocean, the earthquake generated a tsunami that focused the world’s attention on the devastating power of this natural phenomenon. With e ...
... recorded using modern seismographic equipment. As it shook the west coast of Sumatra, Indonesia, and proceeded along a fault line at the eastern edge of the Indian Ocean, the earthquake generated a tsunami that focused the world’s attention on the devastating power of this natural phenomenon. With e ...
The thermal structure of subduction zones constrained by seismic
... studies prescribe the geometry and motion of the subducting slab and assume that this drives convection dynamically in the overlying mantle wedge, which in turn lies below an immobile lithospheric plate. In most cases the interface between slab and wedge is inferred from the Wadati-Benioff zone (WBZ ...
... studies prescribe the geometry and motion of the subducting slab and assume that this drives convection dynamically in the overlying mantle wedge, which in turn lies below an immobile lithospheric plate. In most cases the interface between slab and wedge is inferred from the Wadati-Benioff zone (WBZ ...
Breakthrough the Discontinuity: 21st Century Mohole
... from the crust into the uppermost mantle through the Moho not only changes the physicochemical properties of the lithosphere and the chemical composition of the ocean but also modifies the Moho discontinuity by serpentinization of the mantle peridotite, where deep frontiers of microbes are expected. ...
... from the crust into the uppermost mantle through the Moho not only changes the physicochemical properties of the lithosphere and the chemical composition of the ocean but also modifies the Moho discontinuity by serpentinization of the mantle peridotite, where deep frontiers of microbes are expected. ...
- Arizona State University
... high background noise and/or instability in the receiver function deconvolution. By calculating the maximum predicted dt/dp we can calculate the maximum physically reasonable range of k and design an f k filter to attenuate receiver function amplitudes with high variability as a function of horizont ...
... high background noise and/or instability in the receiver function deconvolution. By calculating the maximum predicted dt/dp we can calculate the maximum physically reasonable range of k and design an f k filter to attenuate receiver function amplitudes with high variability as a function of horizont ...
Lateral Forces Study Guide:
... Damping - is any effect, either deliberately engendered or inherent to a system, that tends to reduce the amplitude of oscillations of an oscillatory system. Alluvium - soil or sediments deposited by a river or other running water. Alluvium is typically made up of a variety of materials, including f ...
... Damping - is any effect, either deliberately engendered or inherent to a system, that tends to reduce the amplitude of oscillations of an oscillatory system. Alluvium - soil or sediments deposited by a river or other running water. Alluvium is typically made up of a variety of materials, including f ...
Next-generation plate-tectonic reconstructions using
... images (in which the value of each cell is the color of a pixel). The first type of raster is generally the unprocessed result of some geospatial computation or measurement; the second type of raster is either a photographic image, or a computational result or measurement that has already been proces ...
... images (in which the value of each cell is the color of a pixel). The first type of raster is generally the unprocessed result of some geospatial computation or measurement; the second type of raster is either a photographic image, or a computational result or measurement that has already been proces ...
Seismic Waves
... surface experiences shaking from the waves that are both coming and going, increasing the strength of shaking. Other factors further influence how seismic waves behave, particularly topography and soil composition. Loosely compacted soils such as sand or old lakebeds can liquefy, causing buildings t ...
... surface experiences shaking from the waves that are both coming and going, increasing the strength of shaking. Other factors further influence how seismic waves behave, particularly topography and soil composition. Loosely compacted soils such as sand or old lakebeds can liquefy, causing buildings t ...
When and why the continental crust is subducted: Examples of
... The Indian subcontinent has been colliding against Asia along the Himalayas. Hindu Kush and Burma in this collision zone have intermediate-depth seismicities beneath them, with most of the continental crust subducted into a few hundred km depth. The subduction, not collision, in these regions is an ...
... The Indian subcontinent has been colliding against Asia along the Himalayas. Hindu Kush and Burma in this collision zone have intermediate-depth seismicities beneath them, with most of the continental crust subducted into a few hundred km depth. The subduction, not collision, in these regions is an ...
47. Structure and Evolution of the Central Kerguelen Plateau
... reflectors; they have grouped the flows using variations in the physical properties, and their calculations indicate that the transitions between the groups often produce reflection coefficients of a magnitude sufficient to explain the reflection events observed in the seismic record. The two types ...
... reflectors; they have grouped the flows using variations in the physical properties, and their calculations indicate that the transitions between the groups often produce reflection coefficients of a magnitude sufficient to explain the reflection events observed in the seismic record. The two types ...
Chiral ratio of the compressional and shear velocity for the
... and the Hara’s relation (high-frequency energy radiation from the arrival time of a P-wave). We find this connection through the dilatation factor t ' t / ( x) which is incorporated to eq. (9). The meaning of time may be considered in two ways: (a) the time based on the reading of clocks which ...
... and the Hara’s relation (high-frequency energy radiation from the arrival time of a P-wave). We find this connection through the dilatation factor t ' t / ( x) which is incorporated to eq. (9). The meaning of time may be considered in two ways: (a) the time based on the reading of clocks which ...
M. Koch
... allowing determination of Vp/Vs- ratios. Su, W.-J., Dziewonski, A.M., 1997. Simultaneous inversion for 3-D variations in shear and bulk velocity in the mantle. Phys. Earth Planet. Inter. 100, 135–156 ...
... allowing determination of Vp/Vs- ratios. Su, W.-J., Dziewonski, A.M., 1997. Simultaneous inversion for 3-D variations in shear and bulk velocity in the mantle. Phys. Earth Planet. Inter. 100, 135–156 ...
Structure of the South-Eastern Nechako Basin
... First-arrival tomographic inversion (Aldridge and Oldenburg, 1993) derives an estimate of the seismic P-wave velocity from the seismic travel times. Velocity models derived from several Canadian Hunter reflection lines reveal structures in near-surface rocks that are poorly imaged by seismic reflect ...
... First-arrival tomographic inversion (Aldridge and Oldenburg, 1993) derives an estimate of the seismic P-wave velocity from the seismic travel times. Velocity models derived from several Canadian Hunter reflection lines reveal structures in near-surface rocks that are poorly imaged by seismic reflect ...
The seismic Travel Time Problem as applied to Tomography of the
... allowing determination of Vp/Vs- ratios. Su, W.-J., Dziewonski, A.M., 1997. Simultaneous inversion for 3-D variations in shear and bulk velocity in the mantle. Phys. Earth Planet. Inter. 100, 135–156 ...
... allowing determination of Vp/Vs- ratios. Su, W.-J., Dziewonski, A.M., 1997. Simultaneous inversion for 3-D variations in shear and bulk velocity in the mantle. Phys. Earth Planet. Inter. 100, 135–156 ...
3-D structure of the Rio Grande Rift from 1
... The Southern terminus of the Rio Grande Rift region has been poorly defined in the geologic record, with few seismic studies that provide information on the deeper Rift structure. In consequence, important questions related to tectonic and lithospheric activity of the Rio Grande Rift remain unresolve ...
... The Southern terminus of the Rio Grande Rift region has been poorly defined in the geologic record, with few seismic studies that provide information on the deeper Rift structure. In consequence, important questions related to tectonic and lithospheric activity of the Rio Grande Rift remain unresolve ...
Delamination, Slab Break-Off, and Slab Roll-Back
... • Mechanical properties of the crust and lithospheric mantle • Basis for series of lithospheric-scale cross sections showing collisional delamination ...
... • Mechanical properties of the crust and lithospheric mantle • Basis for series of lithospheric-scale cross sections showing collisional delamination ...
CE2071_Unit 5
... It will involve actions for upgrading the seismic resistance of an existing building so that becomes safer under the occurrence of probable future earthquakes. The seismic behavior of existing buildings is affected by their original structural inadequacies, material degradation due to aging and alte ...
... It will involve actions for upgrading the seismic resistance of an existing building so that becomes safer under the occurrence of probable future earthquakes. The seismic behavior of existing buildings is affected by their original structural inadequacies, material degradation due to aging and alte ...
The Moho in subduction zones - Earth and Space Sciences at the
... nature of subduction zones implies the convergence of two plates, each characterized by a distinct Moho: one Moho associated with the incoming oceanic plate and another that may be of either continental or oceanic affinity. In this paper, we shall examine the processes operating in subduction zone fo ...
... nature of subduction zones implies the convergence of two plates, each characterized by a distinct Moho: one Moho associated with the incoming oceanic plate and another that may be of either continental or oceanic affinity. In this paper, we shall examine the processes operating in subduction zone fo ...
THE ORIGIN AND GROWTH OF CONTINENTS 1 Geophysical
... evidence (Table II). Layer 3 of the oceanic crust and appears to be universally observed in oceanic areas. It is characterised by very uniform F-wave velocities and this argues for uniform composition. Present geological processes on the ocean floor will give rise to a non-uniform mixture of basic v ...
... evidence (Table II). Layer 3 of the oceanic crust and appears to be universally observed in oceanic areas. It is characterised by very uniform F-wave velocities and this argues for uniform composition. Present geological processes on the ocean floor will give rise to a non-uniform mixture of basic v ...
Local earthquake tomography of central Costa Rica
... (iv) Do the seismic velocities or V p /V s ratio indicate substantial differences in the crustal structure across the edge of the active section of the volcanic arc? Based on two seismic networks with an average station spacing of ∼15 km, we aimed to obtain high-resolution P- and S-wave tomo C ...
... (iv) Do the seismic velocities or V p /V s ratio indicate substantial differences in the crustal structure across the edge of the active section of the volcanic arc? Based on two seismic networks with an average station spacing of ∼15 km, we aimed to obtain high-resolution P- and S-wave tomo C ...
This article appeared in a journal published by Elsevier. The
... structure, the Las Cañadas edifice (Marti et al., 1994) (Fig. 1). The volcanic evolution of Tenerife comprises both constructive and destructive phases including vertical and lateral collapses on the order of several km3 (Marti et al., 1997). At least three vertical collapses resulted in the formatio ...
... structure, the Las Cañadas edifice (Marti et al., 1994) (Fig. 1). The volcanic evolution of Tenerife comprises both constructive and destructive phases including vertical and lateral collapses on the order of several km3 (Marti et al., 1997). At least three vertical collapses resulted in the formatio ...
Earthscope
Earthscope is an earth science program using geological and geophysical techniques to explore the structure and evolution of the North American continent and to understand the processes controlling earthquakes and volcanoes. The project has three components: USARRAY, the Plate Boundary Observatory, and the San Andreas Fault Observatory at Depth.The project is funded by the National Science Foundation (NSF), and the data produced is publicly accessible in real-time. Organizations associated with the project include UNAVCO, the Incorporated Research Institutions for Seismology (IRIS), Stanford University, the United States Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). Several international organizations also contribute to the initiative.