Seismic attenuation in fluid-filled fractured porous media – a
... of fluid pressure diffusion phenomena. This physical process occurs between the compliant fracturefilling material and the stiff host rock (FB WIFF) as well as between intersecting fractures (FF WIFF). As shown numerically (Rubino et al. 2013) and theoretically (Guo et al. 2016), wave-induced fluid ...
... of fluid pressure diffusion phenomena. This physical process occurs between the compliant fracturefilling material and the stiff host rock (FB WIFF) as well as between intersecting fractures (FF WIFF). As shown numerically (Rubino et al. 2013) and theoretically (Guo et al. 2016), wave-induced fluid ...
Oceanic lithosphere-asthenosphere boundary from - HAL
... The data set is composed of compiled Rayleigh and Love wave group and phase velocities. A very large amount of these data was collected from different groups. These include phase velocity dispersion data of the fundamental mode of the Love and Rayleigh waves from Harvard [Ekström et al., 1997] using ...
... The data set is composed of compiled Rayleigh and Love wave group and phase velocities. A very large amount of these data was collected from different groups. These include phase velocity dispersion data of the fundamental mode of the Love and Rayleigh waves from Harvard [Ekström et al., 1997] using ...
The Trajan Markets and their Great Hall
... The analytical study of the vault and its surrounding structural elements was carried out by means of a numerical 3D model developed for the static and dynamic structural behaviour evaluation, using the Algor program produced by Algor Inc. The 3D Finite Element mesh is refined in such a way to descr ...
... The analytical study of the vault and its surrounding structural elements was carried out by means of a numerical 3D model developed for the static and dynamic structural behaviour evaluation, using the Algor program produced by Algor Inc. The 3D Finite Element mesh is refined in such a way to descr ...
GPS in Earth Sciences
... D) Looking at your graphs of the North and East components, which direction is site P499 currently travelling (i.e. between September 2012 and May 2014)? (Hint: A positive slope indicates north and east movement respectively). ...
... D) Looking at your graphs of the North and East components, which direction is site P499 currently travelling (i.e. between September 2012 and May 2014)? (Hint: A positive slope indicates north and east movement respectively). ...
3.2PlateBoundaries
... • Break the graham cracker into four rectangles following the perforations. Set aside two graham cracker pieces for Part 4. • Using two graham cracker rectangles, dip one end of both graham crackers about 2 centimeters into a cup of water. Immediately remove the crackers and lay them end to end on t ...
... • Break the graham cracker into four rectangles following the perforations. Set aside two graham cracker pieces for Part 4. • Using two graham cracker rectangles, dip one end of both graham crackers about 2 centimeters into a cup of water. Immediately remove the crackers and lay them end to end on t ...
Upper mantle and lithospheric heterogeneities in central
... Potsdam, Telegrafenberg, 14473 Potsdam, Germany. E-mail: [email protected] Universität Berlin, Germany ...
... Potsdam, Telegrafenberg, 14473 Potsdam, Germany. E-mail: [email protected] Universität Berlin, Germany ...
Limits on lateral density and velocity variations in the Earth`s outer core
... The viscosity of the core is not well known precisely because (unlike the mantle) it is dynamically unimportant. At the top of the core, nutation studies limit the kinematic viscosity v.;; 10 5 cm 2 s- 1 (Toomre 1974; see also Rochester 1976). Although seismic constraints are more global, yet weaker ...
... The viscosity of the core is not well known precisely because (unlike the mantle) it is dynamically unimportant. At the top of the core, nutation studies limit the kinematic viscosity v.;; 10 5 cm 2 s- 1 (Toomre 1974; see also Rochester 1976). Although seismic constraints are more global, yet weaker ...
The recent seismo-volcanic activity at Deception Island volcano
... have been deployed temporarily during each Antarctic summer. These networks have consisted of a variety of instruments, including radio-telemetered stations, autonomous digital seismic stations, broadband seismometers, and seismic arrays. We have identified two main types of seismic signals generated ...
... have been deployed temporarily during each Antarctic summer. These networks have consisted of a variety of instruments, including radio-telemetered stations, autonomous digital seismic stations, broadband seismometers, and seismic arrays. We have identified two main types of seismic signals generated ...
Asymmetric ocean basins - Indico
... and Ritzwoller, 2002; http://ciei. colorado.edu/~nshapiro/MODEL) obtained by tomographic ...
... and Ritzwoller, 2002; http://ciei. colorado.edu/~nshapiro/MODEL) obtained by tomographic ...
Structure and Serpentinization of the Subducting Cocos Plate
... 2008, 2010] and South America [Ranero and Sallarès, 2004; Contreras‐Reyes et al., 2008a] with ocean bottom seismometer (OBS) refraction profiles has shown that seismic wave speeds are reduced in both the oceanic crust and upper mantle between the outer rise of the subduction zone and the trench axis ...
... 2008, 2010] and South America [Ranero and Sallarès, 2004; Contreras‐Reyes et al., 2008a] with ocean bottom seismometer (OBS) refraction profiles has shown that seismic wave speeds are reduced in both the oceanic crust and upper mantle between the outer rise of the subduction zone and the trench axis ...
Why the Philippine Sea Plate Moves as It Does
... You should be familiar with the schematic cross-section of a Steerhead basin. Why do early draping sediments tend to be salts? Why do later sediments tend to onlap the adjacent rift flanks? Whare are good examples of Steerhead basins? Metamorphic core complexes (MCCs) are rather different beasts (p ...
... You should be familiar with the schematic cross-section of a Steerhead basin. Why do early draping sediments tend to be salts? Why do later sediments tend to onlap the adjacent rift flanks? Whare are good examples of Steerhead basins? Metamorphic core complexes (MCCs) are rather different beasts (p ...
Seismic Response of High Plasticity Clays subjected
... leading to costly and sometimes unsafe seismic designs. This is particularly important in Mexico City, because historical seismicity has proven that the subduction zone located along the Coast of Oaxaca state is able to produce events with moment magnitude, M w , of 8.6, with potential fault rupture ...
... leading to costly and sometimes unsafe seismic designs. This is particularly important in Mexico City, because historical seismicity has proven that the subduction zone located along the Coast of Oaxaca state is able to produce events with moment magnitude, M w , of 8.6, with potential fault rupture ...
Lecture 7: Rock and Minerals
... Magma: mixture of molten rock, gases and mineral phases, produced by mantle melting Mantle melts between ~800-1250ºC due to: 1) Increase in temperature 2) Decrease in pressure 3) Addition of volatile phases (e.g., water) ...
... Magma: mixture of molten rock, gases and mineral phases, produced by mantle melting Mantle melts between ~800-1250ºC due to: 1) Increase in temperature 2) Decrease in pressure 3) Addition of volatile phases (e.g., water) ...
Hydrothermal vent Activities At the Gjallar Ridge In the
... magma chamber. They can be found on continental margins and likely formed during early stages of continental rifting. Geothermal systems Hydrothermal circulation systems The heat of Earth’s interior is thought to have several sources. Apart from the heat derived from the formation of the planet, the ...
... magma chamber. They can be found on continental margins and likely formed during early stages of continental rifting. Geothermal systems Hydrothermal circulation systems The heat of Earth’s interior is thought to have several sources. Apart from the heat derived from the formation of the planet, the ...
Velocity increase in the uppermost oceanic crust of subducting
... distinct later arrivals were observed during other events (e.g., events 6 and 7) of similar epicenter locations but different source depths (Figure 1c,d). The observed distinct later phases were interpreted as trapped P waves propagating along the oceanic crust of the Philippine Sea plate. To obtain ...
... distinct later arrivals were observed during other events (e.g., events 6 and 7) of similar epicenter locations but different source depths (Figure 1c,d). The observed distinct later phases were interpreted as trapped P waves propagating along the oceanic crust of the Philippine Sea plate. To obtain ...
(2008) Stress-forecasting not predicting earthquakes: A paradigm shift
... attempting to predict earthquakes by investigating source zones and source-zone precursors, the time and magnitude and in some circumstances location of impending larger earthquakes can be stress-forecast by monitoring the approach to fracture criticality anywhere within an extensive volume surround ...
... attempting to predict earthquakes by investigating source zones and source-zone precursors, the time and magnitude and in some circumstances location of impending larger earthquakes can be stress-forecast by monitoring the approach to fracture criticality anywhere within an extensive volume surround ...
south Brittany - Site de Patrick Ledru
... This paper combines geological knowledge and geophysical imagery at the crustal scale to model the 3D geometry of a segment of the Hercynian suture zone of western Europe in the Champtoceaux area (Brittany, France). The Champtoceaux complex consists of a stack of metamorphic nappes of gneisses and m ...
... This paper combines geological knowledge and geophysical imagery at the crustal scale to model the 3D geometry of a segment of the Hercynian suture zone of western Europe in the Champtoceaux area (Brittany, France). The Champtoceaux complex consists of a stack of metamorphic nappes of gneisses and m ...
Ground rotations
... fields. Standard inertial seismometers measure three components of translational ground displacement (velocity, acceleration) and form the basis for monitoring seismic activity and ground motion. The second type aims at measuring the deformation of the Earth (strains). It has been noted for decades ( ...
... fields. Standard inertial seismometers measure three components of translational ground displacement (velocity, acceleration) and form the basis for monitoring seismic activity and ground motion. The second type aims at measuring the deformation of the Earth (strains). It has been noted for decades ( ...
Crustal structure of the ultra-slow spreading Knipovich Ridge, North
... Hellevang and Pedersen (2005) demonstrated the magmatic nature of the entire ridge segment. The first line, acquired along an assumed amagmatic portion of of oceanic crustal formation, was presented by Kandilarov et al. (2008). The second line, subject of the present paper, was acquired at the topog ...
... Hellevang and Pedersen (2005) demonstrated the magmatic nature of the entire ridge segment. The first line, acquired along an assumed amagmatic portion of of oceanic crustal formation, was presented by Kandilarov et al. (2008). The second line, subject of the present paper, was acquired at the topog ...
Crustal Shortening and Extension in the Central Andes: Insights
... Norabuena et al. [1998] and Leffler et al. [1997] answered this question by suggesting that part of the GPSmeasured strain is elastic and will be released by future earthquakes. Transient strain accumulation and release associated with the seismic cycle at subduction zones have been well studied [Sa ...
... Norabuena et al. [1998] and Leffler et al. [1997] answered this question by suggesting that part of the GPSmeasured strain is elastic and will be released by future earthquakes. Transient strain accumulation and release associated with the seismic cycle at subduction zones have been well studied [Sa ...
Earthquake - Government Degree College Pulwama
... to slow down and collide into each other. This amalgamation of waves then produces a super wave that can be as tall as 65 meters in height. ...
... to slow down and collide into each other. This amalgamation of waves then produces a super wave that can be as tall as 65 meters in height. ...
Seismology - Università degli studi di Trieste
... Given the arrival times and amplitudes of several seismic phases on a number of stations, compute distribution of velocity, density and attenuation coefficient with depth, and positions of all discontinuities. This is very difficult and often does not give a unique solution. Instead, a range of solu ...
... Given the arrival times and amplitudes of several seismic phases on a number of stations, compute distribution of velocity, density and attenuation coefficient with depth, and positions of all discontinuities. This is very difficult and often does not give a unique solution. Instead, a range of solu ...
Electrical conductivity structure of the Alpine Fault and its
... to measure these forces directly, we must use surface geophysical measurements to provide information about other properties that are indirectly related to these forces. In this EQC funded project we have used information gathered from an array of seismometers and from measurements of natural fluctu ...
... to measure these forces directly, we must use surface geophysical measurements to provide information about other properties that are indirectly related to these forces. In this EQC funded project we have used information gathered from an array of seismometers and from measurements of natural fluctu ...
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.