Context > See-Through Body > Teaching and Learning
... World map for vulcanologists World map for seismologists World map for geographers World map showing main tectonic plates Part 3 – predicting earthquakes Introduction/background This activity is aimed at introducing students to the idea of a dynamic Earth; it is not an indepth study of plate tectoni ...
... World map for vulcanologists World map for seismologists World map for geographers World map showing main tectonic plates Part 3 – predicting earthquakes Introduction/background This activity is aimed at introducing students to the idea of a dynamic Earth; it is not an indepth study of plate tectoni ...
Annual Report 2014
... than 50% — but more importantly — CEED published four articles in the prestigious Nature, PNAS and Science magazines. The Science paper — The source crater of martian shergottite meteorites (Werner et al.) — received media attention world-wide, and although meteorites from Mars have been known for s ...
... than 50% — but more importantly — CEED published four articles in the prestigious Nature, PNAS and Science magazines. The Science paper — The source crater of martian shergottite meteorites (Werner et al.) — received media attention world-wide, and although meteorites from Mars have been known for s ...
Q8188
... and compare to maximum when shear wall at lift. In the braced building frame, floor displacement is minimum for X bracing, then for inverted V bracing and nearly same for inclined bracing. In building using damper floor displacement is minimum compared to both shear wall and bracing system. From abo ...
... and compare to maximum when shear wall at lift. In the braced building frame, floor displacement is minimum for X bracing, then for inverted V bracing and nearly same for inclined bracing. In building using damper floor displacement is minimum compared to both shear wall and bracing system. From abo ...
Listric Thrust Faulting in the Laramide Front of North
... vanian faults generated during the Ancestral Rocky Mountain orogeny were reactivated in numerous areas in the southern Rockies [e.g. Tweto, 1975; and Stone, 1986). Marshak et al. [2000] postulated that Ancestral Rockies and Laramide faults resulted from tectonic inversion of a Precambrian normal fau ...
... vanian faults generated during the Ancestral Rocky Mountain orogeny were reactivated in numerous areas in the southern Rockies [e.g. Tweto, 1975; and Stone, 1986). Marshak et al. [2000] postulated that Ancestral Rockies and Laramide faults resulted from tectonic inversion of a Precambrian normal fau ...
Distinct crustal isostasy trends east and west of the Rocky Mountain
... All available continuous time series recorded by USArray stations (Figure 1) between January 2007 and February 2015 were cross correlated to obtain multicomponent empirical Green’s functions between each station pair [Bensen et al., 2007; Lin et al., 2014]. Eikonal tomography [Lin et al., 2009] was ...
... All available continuous time series recorded by USArray stations (Figure 1) between January 2007 and February 2015 were cross correlated to obtain multicomponent empirical Green’s functions between each station pair [Bensen et al., 2007; Lin et al., 2014]. Eikonal tomography [Lin et al., 2009] was ...
Constraints on the viscosity of the continental crust and mantle from
... 1999], but with no regional data to support it. Also, Calais et al. [2002] assumed that relaxation occurs only in the lower crust, whereas other authors have proposed that in other regions it may also affect the upper mantle [Freed and Lin, 2001; Pollitz et al., 2000, 2001]. [6] Several authors have ...
... 1999], but with no regional data to support it. Also, Calais et al. [2002] assumed that relaxation occurs only in the lower crust, whereas other authors have proposed that in other regions it may also affect the upper mantle [Freed and Lin, 2001; Pollitz et al., 2000, 2001]. [6] Several authors have ...
Context > See-Through Body > Teaching and Learning Approaches
... World map for vulcanologists World map for seismologists World map for geographers World map showing main tectonic plates Part 3 – predicting earthquakes Introduction/background This activity is aimed at introducing students to the idea of a dynamic Earth; it is not an indepth study of plate tectoni ...
... World map for vulcanologists World map for seismologists World map for geographers World map showing main tectonic plates Part 3 – predicting earthquakes Introduction/background This activity is aimed at introducing students to the idea of a dynamic Earth; it is not an indepth study of plate tectoni ...
Why is there Lithosphere
... 4. The room temperature chocolate bar represents the uppermost portion of the mantle, or the “upper mantle.” The warm chocolate bar will be referred to as a portion of the asthenosphere. The asthenosphere is also part of the mantle. So, now you know what each of the 3 layers of your model represents ...
... 4. The room temperature chocolate bar represents the uppermost portion of the mantle, or the “upper mantle.” The warm chocolate bar will be referred to as a portion of the asthenosphere. The asthenosphere is also part of the mantle. So, now you know what each of the 3 layers of your model represents ...
letters - Institut de Physique du Globe de Paris
... abutting the northern overlap basin, within a distance of ,7 km along the axis and ,5 km across the axis; that is, a short wavelength increase in travel-time difference of 35–40% in the lower crust. If the whole anomaly is produced by the presence of melt then over 45% of the lower crust could be mo ...
... abutting the northern overlap basin, within a distance of ,7 km along the axis and ,5 km across the axis; that is, a short wavelength increase in travel-time difference of 35–40% in the lower crust. If the whole anomaly is produced by the presence of melt then over 45% of the lower crust could be mo ...
Buried large block revealed by gravity anomalies in the Tonankai... earthquakes regions, southwestern Japan
... refraction experiments. Judging from both physical properties and geological evidences, this block presumably consists of intruded acidic rocks but not either basic or ultrabasic rocks. By carrying out more detailed and various geophysical observations in this area, more accurate distribution of the ...
... refraction experiments. Judging from both physical properties and geological evidences, this block presumably consists of intruded acidic rocks but not either basic or ultrabasic rocks. By carrying out more detailed and various geophysical observations in this area, more accurate distribution of the ...
Deep structure and mechanical behavior of the lithosphere in the
... central Mongolia, Asia, in order to explain the origin and support of large-scale doming in this deforming area. We propose a gravity- and topography-based model which accounts for constraints provided by other independent results from xenolith and tomography studies. Deviations of the measured grav ...
... central Mongolia, Asia, in order to explain the origin and support of large-scale doming in this deforming area. We propose a gravity- and topography-based model which accounts for constraints provided by other independent results from xenolith and tomography studies. Deviations of the measured grav ...
Geodynamic evolution of the Earth over the Phanerozoic: Plate
... dicators. Using an innovative way to convert 2D maps into 3D topographic surfaces, the robustness of the model is tested more directly against sea-level and Sr-ratio varia‑ tions in another paper (Vérard et al., 2015). ...
... dicators. Using an innovative way to convert 2D maps into 3D topographic surfaces, the robustness of the model is tested more directly against sea-level and Sr-ratio varia‑ tions in another paper (Vérard et al., 2015). ...
Tsunamigenic earthquakes in the Gulf of Cadiz
... not required to reproduce current horizontal deformation in these areas. Furthermore, in accordance with geological and GPS observations, the Nubia-Eurasia convergence is accommodated partially in NW Morocco and partially in the Gulf of Cadiz over an area > 200 km wide. Other consequences of the mod ...
... not required to reproduce current horizontal deformation in these areas. Furthermore, in accordance with geological and GPS observations, the Nubia-Eurasia convergence is accommodated partially in NW Morocco and partially in the Gulf of Cadiz over an area > 200 km wide. Other consequences of the mod ...
lecture 5.5 (Alon Ziv)
... Earthquake energy balance: radiated energy versus seismic moment and the apparent stress drop Radiated energy and seismic moment of a large number of earthquakes have been independently estimated. It is interesting to examine the radiated energy and seismic moment ratio. Remarkably, the ratio of ra ...
... Earthquake energy balance: radiated energy versus seismic moment and the apparent stress drop Radiated energy and seismic moment of a large number of earthquakes have been independently estimated. It is interesting to examine the radiated energy and seismic moment ratio. Remarkably, the ratio of ra ...
Crustal structure of the convergent plate-boundary zone
... Local earthquake and air-gun data were used in a simultaneous inversion for 3-D P-wave velocity and hypocenters (Thurber, 1983, 1993; Eberhart-Phillips, 1990). The velocity of the medium is parameterized by assigning velocity values at the 3-D grid of points. We compiled traveltimes for each receive ...
... Local earthquake and air-gun data were used in a simultaneous inversion for 3-D P-wave velocity and hypocenters (Thurber, 1983, 1993; Eberhart-Phillips, 1990). The velocity of the medium is parameterized by assigning velocity values at the 3-D grid of points. We compiled traveltimes for each receive ...
Plate tectonic controls on atmospheric CO2 levels since the Triassic
... The resulting subduction-zone length through time can be described as a simple parabolic function. Increasing total subductionzone length since the Triassic relates to breakup of Pangaea, when continuous subduction along the circum-Pacific continental margins was established (15, 25, 26) and intraoc ...
... The resulting subduction-zone length through time can be described as a simple parabolic function. Increasing total subductionzone length since the Triassic relates to breakup of Pangaea, when continuous subduction along the circum-Pacific continental margins was established (15, 25, 26) and intraoc ...
200 K higher than assumed in
... Lateral variation in relative delay times are due to plate & LVZ structure & subplate anisotropy, not to deep mantle plumes ...
... Lateral variation in relative delay times are due to plate & LVZ structure & subplate anisotropy, not to deep mantle plumes ...
The role of crustal fluids in the tectonic evolution of... Province of the Archaean Yilgarn Craton, Western Australia
... transition at the time leading up to the formation of gold deposits, which we interpret as an indication of the later stages of crustal dewatering. The modelling method is described in more detail by Hobbs et al. (2004). The model in Fig. 4 assumed a crust 30 km thick. A granitic composition was ass ...
... transition at the time leading up to the formation of gold deposits, which we interpret as an indication of the later stages of crustal dewatering. The modelling method is described in more detail by Hobbs et al. (2004). The model in Fig. 4 assumed a crust 30 km thick. A granitic composition was ass ...
Modified True/False - Indicate whether the
... 41. A. The three seismograms all detected P-waves and S-waves at different times. According to the information, what point is the epicenter of the earth quake? Explain. B. Suppose station #2 did not detect any P-waves or S-waves. Could the information from station #1 and station #3 still be used to ...
... 41. A. The three seismograms all detected P-waves and S-waves at different times. According to the information, what point is the epicenter of the earth quake? Explain. B. Suppose station #2 did not detect any P-waves or S-waves. Could the information from station #1 and station #3 still be used to ...
Document
... Intermediate-magnitude thrust events (Ms up to 7.4) occur in southeastern Costa Rica where subduction of the buoyant Cocos Ridge creates moderate plate coupling. Earthquakes with maximum magnitude of 7.0 characterize the central Costa Rica region, where isolated seamounts subduct and may reduce plat ...
... Intermediate-magnitude thrust events (Ms up to 7.4) occur in southeastern Costa Rica where subduction of the buoyant Cocos Ridge creates moderate plate coupling. Earthquakes with maximum magnitude of 7.0 characterize the central Costa Rica region, where isolated seamounts subduct and may reduce plat ...
A comparison of structural styles and prospectivity along the
... NWAAM is identified as a more typical Atlantic Margin syn- and post-rift system. In the study area the major structures were created during the rifting phase from late Triassic until late Jurassic and the following thermal sag phase. Since early Cretaceous the region has been a passive margin. The N ...
... NWAAM is identified as a more typical Atlantic Margin syn- and post-rift system. In the study area the major structures were created during the rifting phase from late Triassic until late Jurassic and the following thermal sag phase. Since early Cretaceous the region has been a passive margin. The N ...
lecture1 - Geological Sciences
... Develop an understanding of (1) the scientific method, (2) rock deformation, rock failure, strain and stress, (3) types of faults and folds, kinematic analysis, stereographic analysis of faults and folds, (4) construction and interpretation of geologic cross-sections. Problem sets: There will weekly ...
... Develop an understanding of (1) the scientific method, (2) rock deformation, rock failure, strain and stress, (3) types of faults and folds, kinematic analysis, stereographic analysis of faults and folds, (4) construction and interpretation of geologic cross-sections. Problem sets: There will weekly ...
Mapping the evolving strain field during continental breakup from
... seismic stations in Ethiopia to constrain the polarization direction of the fast S-wave (φ) and the time delay between the fast and slow S-waves (δt) (Supplementary Fig. S1). The seismograms are derived from local earthquakes in Ethiopia occurring at a depth of 4–22 km (Supplementary Table S1). More ...
... seismic stations in Ethiopia to constrain the polarization direction of the fast S-wave (φ) and the time delay between the fast and slow S-waves (δt) (Supplementary Fig. S1). The seismograms are derived from local earthquakes in Ethiopia occurring at a depth of 4–22 km (Supplementary Table S1). More ...
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.