ECE 121-0107
... are mounted at the base of the building to measure the settlement and plastic hinge activation of the building after an earthquake. They measure periodically or on-demand from the base station. The accelerometers are mounted at every floor of the building to measure the seismic response of the build ...
... are mounted at the base of the building to measure the settlement and plastic hinge activation of the building after an earthquake. They measure periodically or on-demand from the base station. The accelerometers are mounted at every floor of the building to measure the seismic response of the build ...
Inferring fault strength from earthquake rupture properties and the tectonic
... explanation for this behavior can be argued as follows. Consider a rupture that has saturated at the seismogenic width and is constrained to propagate along strike only. As the rupture arrives at an un-slipped section, the slip associated with the initial stress drop at the rupture front determines ...
... explanation for this behavior can be argued as follows. Consider a rupture that has saturated at the seismogenic width and is constrained to propagate along strike only. As the rupture arrives at an un-slipped section, the slip associated with the initial stress drop at the rupture front determines ...
Chapter 01 - Earthquakes
... The impact of earthquakes on society, typically measured by fatalities, injuries, damage, and economic loss, relates to the spatial and temporal nature of the earthquake hazard (e.g., shaking, fault rupture, tsunami, landslide), the exposure of humans and their environment to the hazard (e.g., loca ...
... The impact of earthquakes on society, typically measured by fatalities, injuries, damage, and economic loss, relates to the spatial and temporal nature of the earthquake hazard (e.g., shaking, fault rupture, tsunami, landslide), the exposure of humans and their environment to the hazard (e.g., loca ...
Seismic crustal structure between the Transylvanian
... Matenco et al., 2003) and a strong seismicity at intermediate depths, which is concentrated in the Vrancea area of the southeastern Carpathian bend (Fig. 1; Fuchs et al., 1979; Oncescu et al., 1998). While the shallow seismic activity scatters widely and has moderate magnitudes (Mw b 5.6), the epice ...
... Matenco et al., 2003) and a strong seismicity at intermediate depths, which is concentrated in the Vrancea area of the southeastern Carpathian bend (Fig. 1; Fuchs et al., 1979; Oncescu et al., 1998). While the shallow seismic activity scatters widely and has moderate magnitudes (Mw b 5.6), the epice ...
Subionospheric VLF perturbations observed at low latitude
... stated that it was reasonable for them to have detected no terminator time anomaly on their long propagation path because the perturbed region was too small relative to the whole propagation path. Maekawa and Hayakawa (2006) also stated that N–S propagation itself was not so suitable generally to de ...
... stated that it was reasonable for them to have detected no terminator time anomaly on their long propagation path because the perturbed region was too small relative to the whole propagation path. Maekawa and Hayakawa (2006) also stated that N–S propagation itself was not so suitable generally to de ...
night of the howling dogs - State Library of Louisiana
... http://www.pbs.org/wnet/savageseas/multimedia/wavemachine.html. An experiment for making a Quake Detector: http://teacher.scholastic.com/activities/wwatch/earthquakes/experiments.htm. USGS power point presentation on earthquakes: http://earthquake.usgs.gov/learning/eq101/EQ101.htm. Different intensi ...
... http://www.pbs.org/wnet/savageseas/multimedia/wavemachine.html. An experiment for making a Quake Detector: http://teacher.scholastic.com/activities/wwatch/earthquakes/experiments.htm. USGS power point presentation on earthquakes: http://earthquake.usgs.gov/learning/eq101/EQ101.htm. Different intensi ...
Damage estimation of expansion joint by collision between girders
... and 2.5 (m/s). This is because a collision may generally occur at a velocity of from 1.0 (m/s) to 2.0 (m/s) for the actual bridges during a severe earthquake. 3. Analytical results 3.1 Damage situation of the expansion joints Fig.5 shows the damage situation of the expansion joints at the collision ...
... and 2.5 (m/s). This is because a collision may generally occur at a velocity of from 1.0 (m/s) to 2.0 (m/s) for the actual bridges during a severe earthquake. 3. Analytical results 3.1 Damage situation of the expansion joints Fig.5 shows the damage situation of the expansion joints at the collision ...
10950_2013_9375_MOESM1_ESM
... represented by the Beni Chougrane mountains to the south and Habra basin to the North. The Beni Chougrane mountains are made of Cretaceous napes unconformably covered by folded Neogene and Quaternary deposits. The south-eastern edge of these mountains is separated from the flat Ghriss alluvial basi ...
... represented by the Beni Chougrane mountains to the south and Habra basin to the North. The Beni Chougrane mountains are made of Cretaceous napes unconformably covered by folded Neogene and Quaternary deposits. The south-eastern edge of these mountains is separated from the flat Ghriss alluvial basi ...
Full-waveform inversion of the Japanese Islands region
... To derive a 3-D model of the Japanese Islands region from the seismic recordings, we applied full-waveform inversion [e.g., Bamberger et al., 1982; Igel et al., 1996; Pratt, 1999; Chen et al., 2007; Fichtner et al., 2009a; Tape et al., 2010; Colli et al., 2013], described schematically in the workflo ...
... To derive a 3-D model of the Japanese Islands region from the seismic recordings, we applied full-waveform inversion [e.g., Bamberger et al., 1982; Igel et al., 1996; Pratt, 1999; Chen et al., 2007; Fichtner et al., 2009a; Tape et al., 2010; Colli et al., 2013], described schematically in the workflo ...
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE)
... fs = actual tensile strength of concrete in psi dc = distance from centre of bar to extreme tension fiber in (in.) A = area of concrete symmetric with reinforcing steel divided by the number of bars (in2). 2.2 Effect of cracking on members stiffness: When a symmetrical un-cracked reinforced concrete ...
... fs = actual tensile strength of concrete in psi dc = distance from centre of bar to extreme tension fiber in (in.) A = area of concrete symmetric with reinforcing steel divided by the number of bars (in2). 2.2 Effect of cracking on members stiffness: When a symmetrical un-cracked reinforced concrete ...
Building Typology Report - National Disaster Management Authority
... India faces threats from a large number of natural hazards such as earthquakes, floods, droughts, landslides, cyclones and tsunamis. During the period 1990 to 2010, India experienced 9 damaging earthquakes that have resulted in over 30,000 deaths and caused enormous damage to property, assets and in ...
... India faces threats from a large number of natural hazards such as earthquakes, floods, droughts, landslides, cyclones and tsunamis. During the period 1990 to 2010, India experienced 9 damaging earthquakes that have resulted in over 30,000 deaths and caused enormous damage to property, assets and in ...
readingetal_geology_.. - Research School of Earth Sciences
... each terrane well covered by stations are shown in Figure 3. In this work, the seismic Moho is taken to be the base of the high-velocity gradient zone in the lower crust (i.e., deeper than 30 km). Except where noted explicitly, our results are in agreement with the earlier, less-detailed receiver fu ...
... each terrane well covered by stations are shown in Figure 3. In this work, the seismic Moho is taken to be the base of the high-velocity gradient zone in the lower crust (i.e., deeper than 30 km). Except where noted explicitly, our results are in agreement with the earlier, less-detailed receiver fu ...
De-risking Shallow Hazards through Pore Pressure Prediction and
... have worked on this area but were unable to demarcate the zones of shallow hazards. In an area where well logs were not available, an innovative approach of generating pseudo logs from seismic velocity was adopted. Model based Post Stack Inversion requires low frequecy model using the well logs. The ...
... have worked on this area but were unable to demarcate the zones of shallow hazards. In an area where well logs were not available, an innovative approach of generating pseudo logs from seismic velocity was adopted. Model based Post Stack Inversion requires low frequecy model using the well logs. The ...
Designing Buildings to Accommodate Earthquake Surface Fault
... (Lettis et al. 2000); (b) telephone pole undamaged by surface faulting (Ulusay et al. 2001), (c) pile-supported wharf damaged by 2.4 m of strike-slip offset; and (d) tree trunk split by surface faulting through roots of tree (Ulusay et al. 2001). A side-by-side comparison of two different structural ...
... (Lettis et al. 2000); (b) telephone pole undamaged by surface faulting (Ulusay et al. 2001), (c) pile-supported wharf damaged by 2.4 m of strike-slip offset; and (d) tree trunk split by surface faulting through roots of tree (Ulusay et al. 2001). A side-by-side comparison of two different structural ...
Coseismic stress changes and crustal deformation on the Reykjanes
... although the epicenter was closer to VOGS. The predicted displacements at VOGS, assuming uniform slip models for the SISZ main shocks [Árnadóttir et al., 2000], are 4 mm east and 3 mm north (17 June) and 5 mm east and north (21 June). The observed coseismic offset on 17 June at VOGS is therefore m ...
... although the epicenter was closer to VOGS. The predicted displacements at VOGS, assuming uniform slip models for the SISZ main shocks [Árnadóttir et al., 2000], are 4 mm east and 3 mm north (17 June) and 5 mm east and north (21 June). The observed coseismic offset on 17 June at VOGS is therefore m ...
A ubiquitous lowvelocity layer at the base of the mantle transition zone
... square difference between the L component and a desired delta-like spike function within an 80 s time window. As we are interested in the global average mantle structure, only the Q component receiver functions are considered in this study. All the observed receiver functions are divided into two gr ...
... square difference between the L component and a desired delta-like spike function within an 80 s time window. As we are interested in the global average mantle structure, only the Q component receiver functions are considered in this study. All the observed receiver functions are divided into two gr ...
Inconsistent correlation of seismic layer 2a and lava layer thickness
... the sheeted dyke contact, but its depth is estimated at 3.4–3.5 km from magnetic data18; if this depth is correct (which would be consistent with other areas along the scarp), then the layer 2A/2B boundary is located within the transition zone of lavas and dykes in this region as well. There are two ...
... the sheeted dyke contact, but its depth is estimated at 3.4–3.5 km from magnetic data18; if this depth is correct (which would be consistent with other areas along the scarp), then the layer 2A/2B boundary is located within the transition zone of lavas and dykes in this region as well. There are two ...
Discovery of a magma chamber and faults beneath a Mid
... magma chambers6 or of subsurface near-axis faults, it has been difficult to characterize the interplay of magmatic and tectonic processes in crustal accretion and hydrothermal circulation at slow-spreading ridges. Here we report the presence of a crustal magma chamber beneath the slow-spreading Luck ...
... magma chambers6 or of subsurface near-axis faults, it has been difficult to characterize the interplay of magmatic and tectonic processes in crustal accretion and hydrothermal circulation at slow-spreading ridges. Here we report the presence of a crustal magma chamber beneath the slow-spreading Luck ...
Epicenter FELT ppt
... Seismogram: The actual wiggle (Record of an Earth tremor recorded by a seismograph) ...
... Seismogram: The actual wiggle (Record of an Earth tremor recorded by a seismograph) ...
Earthquake engineering
Earthquake engineering or Seismic engineering is a branch of engineering that searches for ways to make structures, such as buildings and bridges, resistant to earthquake damage. Earthquake engineer, better known as a seismic engineer aim to develop building techniques that will prevent any damage in a minor quake and avoid serious damage or collapse in a major shake. It is the scientific field concerned with protecting society, the natural environment, and the man-made environment from earthquakes by limiting the seismic risk to socio-economically acceptable levels. Traditionally, it has been narrowly defined as the study of the behavior of structures and geo-structures subject to seismic loading; it is considered as a subset of both structural and geotechnical engineering. However, the tremendous costs experienced in recent earthquakes have led to an expansion of its scope to encompass disciplines from the wider field of civil engineering, mechanical engineering and from the social sciences, especially sociology, political science, economics and finance. The main objectives of earthquake engineering are: Foresee the potential consequences of strong earthquakes on urban areas and civil infrastructure. Design, construct and maintain structures to perform at earthquake exposure up to the expectations and in compliance with building codes.A properly engineered structure does not necessarily have to be extremely strong or expensive. It has to be properly designed to withstand the seismic effects while sustaining an acceptable level of damage.