Clusters of Moderate Size Earthquakes along Main Central Thrust
... knickpoints in the gradient of major rivers is southern part of Himalaya corresponds to the traces of MCT which in turn suggest that some segments of MCT may still be active [26]. Supporting evidences of neotectonic activities along MCT is obtained from topographic and geodetic data [27]. From the a ...
... knickpoints in the gradient of major rivers is southern part of Himalaya corresponds to the traces of MCT which in turn suggest that some segments of MCT may still be active [26]. Supporting evidences of neotectonic activities along MCT is obtained from topographic and geodetic data [27]. From the a ...
Mapping stress and structurally controlled crustal shear velocity
... data from the Southern California Seismic Network and Northern California Seismic Network, with an emphasis on Southern California. Western California is a good place to demonstrate this method because there are many independent stress measurements, the tectonic structures are well documented, and t ...
... data from the Southern California Seismic Network and Northern California Seismic Network, with an emphasis on Southern California. Western California is a good place to demonstrate this method because there are many independent stress measurements, the tectonic structures are well documented, and t ...
Observations from Nonlinear, Effective Stress Ground Motion
... two records from a local intraplate event (orthogonal components from 1949 Olympia), and one interface event (1985 Valparaiso). These records were scaled so that the average of the seven records generally matched the firm-ground response spectrum over the period range of 0.2 to 2 seconds, as shown i ...
... two records from a local intraplate event (orthogonal components from 1949 Olympia), and one interface event (1985 Valparaiso). These records were scaled so that the average of the seven records generally matched the firm-ground response spectrum over the period range of 0.2 to 2 seconds, as shown i ...
Plate Tectonics and Earthquake Potential of Spreading Ridges and
... of large events. We present the plate boundary model PB 1999 and use it to associate marine earthquakes with particular plate boundary segments. We then combine these tools to estimate comer magnitudes (me), spectral slopes (/J), and coupled lithosphere thicknesses for all spreading ridges and ocean ...
... of large events. We present the plate boundary model PB 1999 and use it to associate marine earthquakes with particular plate boundary segments. We then combine these tools to estimate comer magnitudes (me), spectral slopes (/J), and coupled lithosphere thicknesses for all spreading ridges and ocean ...
Kenji Satake Affiliation: Earthquake Research Institute The
... IAPSO and IAVCEI) between 2003 and 2011, during which period we experienced the 2004 Indian Ocean and 2011 Tohoku tsunamis. As the Tsunami Commission chair, I participated to numerous meetings, not limited to the scientific ones, but also governmental and inter-governmental ones in order to bridge b ...
... IAPSO and IAVCEI) between 2003 and 2011, during which period we experienced the 2004 Indian Ocean and 2011 Tohoku tsunamis. As the Tsunami Commission chair, I participated to numerous meetings, not limited to the scientific ones, but also governmental and inter-governmental ones in order to bridge b ...
Design of Soil and water conservation structures
... years) with the knowledge that a heavier storm, of a magnitude that occurs once in twenty, fifty or a hundred years, could take place (the frequency in years with which a storm of a given amount is likely to occur is known as the return period). 1.4.4 Risks The risk of damage due to an exceptional s ...
... years) with the knowledge that a heavier storm, of a magnitude that occurs once in twenty, fifty or a hundred years, could take place (the frequency in years with which a storm of a given amount is likely to occur is known as the return period). 1.4.4 Risks The risk of damage due to an exceptional s ...
Tsunami hazards along Chinese coast from
... of the Gutenberg–Richter (GR) relationship (Gutenberg and Richter, 1949), which relates the frequency of earthquakes with a given magnitude range. Second, to arrive at the probability of the forecast of seismic hazard PPFSH,i , one needs to multiply the major earthquake probability Pe,i by Poc,i , t ...
... of the Gutenberg–Richter (GR) relationship (Gutenberg and Richter, 1949), which relates the frequency of earthquakes with a given magnitude range. Second, to arrive at the probability of the forecast of seismic hazard PPFSH,i , one needs to multiply the major earthquake probability Pe,i by Poc,i , t ...
Experimental Study on Partial Replacement of Concrete in
... as the medium for transferring stress from compression zone to the tension zone. Lot of researches were carried out for the investigation of alternate materials that can be used in concrete like fly ash, copper slag, rice husk etc. An alternate method of replacing concrete in the neutral axis of bea ...
... as the medium for transferring stress from compression zone to the tension zone. Lot of researches were carried out for the investigation of alternate materials that can be used in concrete like fly ash, copper slag, rice husk etc. An alternate method of replacing concrete in the neutral axis of bea ...
Multi-mode conversion imaging of the subducted Gorda and Juan
... e.g. Alaska (Rondenay et al., 2008), Cascadia (Bostock et al., 2002; Abers et al., 2009), Costa Rica and Nicaragua (MacKenzie et al., 2010), western Hellenic (Suckale et al., 2009), and central Mexico (Kim et al., 2012). In this paper, we use a multiple mode conversion imaging technique that explici ...
... e.g. Alaska (Rondenay et al., 2008), Cascadia (Bostock et al., 2002; Abers et al., 2009), Costa Rica and Nicaragua (MacKenzie et al., 2010), western Hellenic (Suckale et al., 2009), and central Mexico (Kim et al., 2012). In this paper, we use a multiple mode conversion imaging technique that explici ...
Uncertainty in fundamental natural frequency estimation for alluvial
... used hereunder to predict the transfer function and the extreme acceleration at ground surface via deterministic calculation for each realization, and proceeding thereafter to the statistical treatment of the obtained results. The scope of this paper is to investigate the effect of inherent variabil ...
... used hereunder to predict the transfer function and the extreme acceleration at ground surface via deterministic calculation for each realization, and proceeding thereafter to the statistical treatment of the obtained results. The scope of this paper is to investigate the effect of inherent variabil ...
N. Ambraseys, "Historical earthquakes in Jerusalem – A
... By adopting the latter reading as more plausible in relation to the natural phenomenon described, it is obvious that there is no other explanation than a large landslide, which may or may not had been triggered by this or by another earthquake. Also, Josephus in his Antiquities of the Jews (93 AD), ...
... By adopting the latter reading as more plausible in relation to the natural phenomenon described, it is obvious that there is no other explanation than a large landslide, which may or may not had been triggered by this or by another earthquake. Also, Josephus in his Antiquities of the Jews (93 AD), ...
Seismic tomography of compressional wave attenuation structure for
... model inversions [e.g., Thurber et al., 2009; Lin et al., 2010]. In the checkerboard test, we perturbed the starting 1-D Qp model by ±30% across three grid nodes and alternating at depth. We then computed the synthetic t∗ values through the perturbed model for the same distributions of event hypocen ...
... model inversions [e.g., Thurber et al., 2009; Lin et al., 2010]. In the checkerboard test, we perturbed the starting 1-D Qp model by ±30% across three grid nodes and alternating at depth. We then computed the synthetic t∗ values through the perturbed model for the same distributions of event hypocen ...
3. Design of Structures, Components, Equipment and Systems
... synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding stationary phase, strong motion duration greater than 6 seconds. The acceleration, velocity, ...
... synthetic time histories were generated by modifying a set of actual recorded "TAFT" earthquake time histories. The design time histories include a total time duration equal to 20 seconds and a corresponding stationary phase, strong motion duration greater than 6 seconds. The acceleration, velocity, ...
Seismic retrofit
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes. With better understanding of seismic demand on structures and with our recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged. Prior to the introduction of modern seismic codes in the late 1960s for developed countries (US, Japan etc.) and late 1970s for many other parts of the world (Turkey, China etc.), many structures were designed without adequate detailing and reinforcement for seismic protection. In view of the imminent problem, various research work has been carried out. State-of-the-art technical guidelines for seismic assessment, retrofit and rehabilitation have been published around the world - such as the ASCE-SEI 41 and the New Zealand Society for Earthquake Engineering (NZSEE)'s guidelines. These codes must be regularly updated; the 1994 Northridge earthquake brought to light the brittleness of welded steel frames, for example.The retrofit techniques outlined here are also applicable for other natural hazards such as tropical cyclones, tornadoes, and severe winds from thunderstorms. Whilst current practice of seismic retrofitting is predominantly concerned with structural improvements to reduce the seismic hazard of using the structures, it is similarly essential to reduce the hazards and losses from non-structural elements. It is also important to keep in mind that there is no such thing as an earthquake-proof structure, although seismic performance can be greatly enhanced through proper initial design or subsequent modifications.