Dependence of earthquake recurrence times and independence of
... scec.org/ftp/catalogs/SCSN). It is well known that several important earthquakes occurred in Southern California during the selected period, generating increased seismic activity and breaking the stationary behavior of seismicity (see Fig. 1); this leads to recurrence-time distributions dominated by ...
... scec.org/ftp/catalogs/SCSN). It is well known that several important earthquakes occurred in Southern California during the selected period, generating increased seismic activity and breaking the stationary behavior of seismicity (see Fig. 1); this leads to recurrence-time distributions dominated by ...
The deep structure of south-central Taiwan illuminated by seismic
... (Chuang et al., 2013), earthquake hypocenter (Gourley et al., 2007; Lacombe and Mouthereau, 2002; Lacombe et al., 2001; Mouthereau and Petit, 2003; Wu et al., 1997, 2004, 2008, 2014; Yue et al., 2005) and seismic tomography data (Alvarez-Marron et al., 2014; Camanni et al., 2014b; Huang et al., 2014 ...
... (Chuang et al., 2013), earthquake hypocenter (Gourley et al., 2007; Lacombe and Mouthereau, 2002; Lacombe et al., 2001; Mouthereau and Petit, 2003; Wu et al., 1997, 2004, 2008, 2014; Yue et al., 2005) and seismic tomography data (Alvarez-Marron et al., 2014; Camanni et al., 2014b; Huang et al., 2014 ...
Probabilistic assessment of the structural safety of a type of bolted
... Steel buildings are a common design solution for seismic zones. However, the selection of the appropriate connection type is still an issue in Mexico. Special interest has been raised about the fragile behavior of welded connections, especially after the amount of damages experienced due to the Nort ...
... Steel buildings are a common design solution for seismic zones. However, the selection of the appropriate connection type is still an issue in Mexico. Special interest has been raised about the fragile behavior of welded connections, especially after the amount of damages experienced due to the Nort ...
Seismological structure of subduction zones and its implications for
... In this paper I review recent seismological findings on the structure, magmatism, and dynamics of subduction zones. High-resolution seismic tomography has revealed prominent low-velocity (low-V ) and high-attenuation (low-Q) zones that exist in the crust and uppermost mantle just beneath active arc ...
... In this paper I review recent seismological findings on the structure, magmatism, and dynamics of subduction zones. High-resolution seismic tomography has revealed prominent low-velocity (low-V ) and high-attenuation (low-Q) zones that exist in the crust and uppermost mantle just beneath active arc ...
Quantifying the effect of large earthquakes in promoting eruptions
... the key attributes of each volcano that may lead to a seismically-triggered eruption and the general mechanisms by which earthquakes could trigger volcanic new activity. We developed a new approach by resolving the earthquake-induced normal static stress change on the magma pathway of each volcano i ...
... the key attributes of each volcano that may lead to a seismically-triggered eruption and the general mechanisms by which earthquakes could trigger volcanic new activity. We developed a new approach by resolving the earthquake-induced normal static stress change on the magma pathway of each volcano i ...
IDENTIFICATION OF SLIDE-GENERATED TSUNAMIS IN THE
... height. For a typical tectonic tsunami this difference is within 1.0–2.0, while for the slidegenerated event it may exceed 3.0 – 4.0 (see the data in Table 1). A similar feature of involving the slumping mechanism at the tsunami generation stage is the difference of the measured tsunami intensity fr ...
... height. For a typical tectonic tsunami this difference is within 1.0–2.0, while for the slidegenerated event it may exceed 3.0 – 4.0 (see the data in Table 1). A similar feature of involving the slumping mechanism at the tsunami generation stage is the difference of the measured tsunami intensity fr ...
Relationship between displacement and velocity
... model is too high comparing with other models, and it might be unrealistic. The spectrum model indicates that high-frequency signal strength increases with the size of an earthquake. To evaluate this hypothesis, relationship between seismic moment and observed spectrum ratio is examined. The data fr ...
... model is too high comparing with other models, and it might be unrealistic. The spectrum model indicates that high-frequency signal strength increases with the size of an earthquake. To evaluate this hypothesis, relationship between seismic moment and observed spectrum ratio is examined. The data fr ...
User Manual for M8 - Indico
... (s) magnitude weighted sum of mainshocks divided by the number of these events to the γ power, s(t|m,M',s,β,γ) = Σ 10βMj /(Σ 1)γ , here the summations are taken over the preceding s years on a population of mainshocks {j} with magnitudes Mj from the interval m # Mj < M'. (Note: n-type is formally em ...
... (s) magnitude weighted sum of mainshocks divided by the number of these events to the γ power, s(t|m,M',s,β,γ) = Σ 10βMj /(Σ 1)γ , here the summations are taken over the preceding s years on a population of mainshocks {j} with magnitudes Mj from the interval m # Mj < M'. (Note: n-type is formally em ...
Segmentation of seismicity along the Himalayan Arc due to
... concentrated earthquakes, which at surface is only 2030 km wide and criss-crosses the Main Central Thrust (MCT) is referred to Himalayan Seismic Belt (HSB). In a few balanced geological cross sections, the transition zone which connects the subhorizontal detachment on either side (Gahalaut and Kalpn ...
... concentrated earthquakes, which at surface is only 2030 km wide and criss-crosses the Main Central Thrust (MCT) is referred to Himalayan Seismic Belt (HSB). In a few balanced geological cross sections, the transition zone which connects the subhorizontal detachment on either side (Gahalaut and Kalpn ...
Centrifuge tests to assess seismic site response of partially
... slightly different leaning toward lower values within the upper portion of the profile (this is observed in the analytical solutions in Fig. 1(b)). This scaling factor is solely for an infiltration problem, where the same prototype suction profile would be achieved in a model (in large centrifuges) unde ...
... slightly different leaning toward lower values within the upper portion of the profile (this is observed in the analytical solutions in Fig. 1(b)). This scaling factor is solely for an infiltration problem, where the same prototype suction profile would be achieved in a model (in large centrifuges) unde ...
Damage identification of a 3D full scale steel
... assessment of the Joint Research Centre in Ispra, and consisted of a full-scale two-storey twobay frame with dimensions of 12.8 m by 7.4 m in plan and 7.0 m in height. Resistance to lateral seismic loads was provided by three parallel MR frames in the main direction of loading and by a bracing syste ...
... assessment of the Joint Research Centre in Ispra, and consisted of a full-scale two-storey twobay frame with dimensions of 12.8 m by 7.4 m in plan and 7.0 m in height. Resistance to lateral seismic loads was provided by three parallel MR frames in the main direction of loading and by a bracing syste ...
Possible stress states adjacent to the rupture
... 1993; Yu et al., 1997). In the case of isotropic horizontal stress with the magnitude smaller than the vertical stress (Fig. 2b), focal mechanisms are favorable to normal-faulting ubiquitously. Such distribution of focal mechanisms can only tally with few aftershocks and disagree with the region str ...
... 1993; Yu et al., 1997). In the case of isotropic horizontal stress with the magnitude smaller than the vertical stress (Fig. 2b), focal mechanisms are favorable to normal-faulting ubiquitously. Such distribution of focal mechanisms can only tally with few aftershocks and disagree with the region str ...
Reducing depressive symptoms after the Great East
... the death of a family member and the extent of destruction of their homes. However, these preventive effects tended to be attenuated among survivors who reported suffering more extensive damage to their homes from the earthquake and tsunami. Although the mean change in the GDS score before and after ...
... the death of a family member and the extent of destruction of their homes. However, these preventive effects tended to be attenuated among survivors who reported suffering more extensive damage to their homes from the earthquake and tsunami. Although the mean change in the GDS score before and after ...
seismic response of buried pipelines to surface wave propagation
... Soil-structure interaction triggered by seismic waves has an important effect on buried pipeline behavior, and when integrated over an entire network of pipelines, on system performance (O’Rourke, et al. 2004a). In general, there are two types of seismic waves, body and surface waves. Compared with ...
... Soil-structure interaction triggered by seismic waves has an important effect on buried pipeline behavior, and when integrated over an entire network of pipelines, on system performance (O’Rourke, et al. 2004a). In general, there are two types of seismic waves, body and surface waves. Compared with ...
4. Adoption of Amendment to Berkeley Building
... 34 by adding new definitions to Section 3402.1 and adding a new Repair Requirements Subsection 3403.5 to Section 3403 Additions, Alterations or Repair. This chapter establishes regulations as amendments to the building code for the expeditious repair of damaged structures. In the event an amendment ...
... 34 by adding new definitions to Section 3402.1 and adding a new Repair Requirements Subsection 3403.5 to Section 3403 Additions, Alterations or Repair. This chapter establishes regulations as amendments to the building code for the expeditious repair of damaged structures. In the event an amendment ...
Central US earthquake catalog for hazard maps of Memphis
... of the smaller earthquakes, only maximum intensity was available, and this was converted directly to mbLg with a look-up table of unspeci®ed origin (Nuttli, 1974). Absent an isoseismal map, if magnitudes from both the felt area and the maximum intensity were available, Nuttli (1979) used the larger. ...
... of the smaller earthquakes, only maximum intensity was available, and this was converted directly to mbLg with a look-up table of unspeci®ed origin (Nuttli, 1974). Absent an isoseismal map, if magnitudes from both the felt area and the maximum intensity were available, Nuttli (1979) used the larger. ...
a study on characteristics of ground motion in permafrost
... Based on field geological investigation at permafrost regions, geological description and test of waves velocities of the 14 typical drilling holes distributing permafrost areas along the Qinghai-Tibet railway, elementary characteristics of soil wave velocities at the permafrost regions are presente ...
... Based on field geological investigation at permafrost regions, geological description and test of waves velocities of the 14 typical drilling holes distributing permafrost areas along the Qinghai-Tibet railway, elementary characteristics of soil wave velocities at the permafrost regions are presente ...
Seismicity models based on Coulomb stress calculations
... Receiver orientation: The calculation of Coulomb stress changes requires the definition of the geometry and the faulting mechanism of the target faults upon which stress perturbations are resolved. Two approaches are commonly adopted; the first one relies on resolving stress changes onto a prescribe ...
... Receiver orientation: The calculation of Coulomb stress changes requires the definition of the geometry and the faulting mechanism of the target faults upon which stress perturbations are resolved. Two approaches are commonly adopted; the first one relies on resolving stress changes onto a prescribe ...
Paper 42 - New Zealand Society for Earthquake Engineering Inc.
... Several shaking table tests were conducted using the above-mentioned earthquake ground motions at various peak ground acceleration levels. In this paper, response time-histories for the following ground motions are presented: El Centro 30%, Taft 40%, Sylmar 10% and Kobe 10% with peak ground acceler ...
... Several shaking table tests were conducted using the above-mentioned earthquake ground motions at various peak ground acceleration levels. In this paper, response time-histories for the following ground motions are presented: El Centro 30%, Taft 40%, Sylmar 10% and Kobe 10% with peak ground acceler ...
Pole-Tide Modulation of Slow Slip Events at Circum-Pacific
... located near the downdip end of the transition zone from fully locked to creeping following published estimates. The plate geometry parameters are listed in Table 1. The calculated pole tide induced stresses on the plate interface for all the areas are shown in Figure 2. A remarkable synchronization ...
... located near the downdip end of the transition zone from fully locked to creeping following published estimates. The plate geometry parameters are listed in Table 1. The calculated pole tide induced stresses on the plate interface for all the areas are shown in Figure 2. A remarkable synchronization ...
Study on Seismic Behavior of Lateral Force Resisting System
... Lateral force resisting system plays an important role in the multistoried buildings which are situated in high seismic zones. Lateral force resisting system reduces the lateral forces acting during the earthquake and increases the stiffness of the structure. To make the structure earthquake resista ...
... Lateral force resisting system plays an important role in the multistoried buildings which are situated in high seismic zones. Lateral force resisting system reduces the lateral forces acting during the earthquake and increases the stiffness of the structure. To make the structure earthquake resista ...
Interface Locking of Subduction Zone near Costa Rica using
... process ceaselessly. Globally, 80 percentage of the global seismic moment was released around those subduction seismogenic zones [Pacheco & Sykes, 1992]. Great shaking of the ground produced by these megathrust earthquakes and tsunami caused by the failure of shallow portion of the subduction interf ...
... process ceaselessly. Globally, 80 percentage of the global seismic moment was released around those subduction seismogenic zones [Pacheco & Sykes, 1992]. Great shaking of the ground produced by these megathrust earthquakes and tsunami caused by the failure of shallow portion of the subduction interf ...
Proposal_Yan - Geophysics at Georgia Tech
... process ceaselessly. Globally, 80 percentage of the global seismic moment was released around those subduction seismogenic zones [Pacheco & Sykes, 1992]. Great shaking of the ground produced by these megathrust earthquakes and tsunami caused by the failure of shallow portion of the subduction interf ...
... process ceaselessly. Globally, 80 percentage of the global seismic moment was released around those subduction seismogenic zones [Pacheco & Sykes, 1992]. Great shaking of the ground produced by these megathrust earthquakes and tsunami caused by the failure of shallow portion of the subduction interf ...
SEISMIC RETROFIT OF REINFORCED CONCRETE BUILDINGS
... (Carvalho, 1998). The reinforcement details were specified to be representative of buildings constructed over 40 years ago in European Mediterranean countries such as Italy, Portugal and Greece. In the following sections, the building is described and the results of a preliminary assessment of its l ...
... (Carvalho, 1998). The reinforcement details were specified to be representative of buildings constructed over 40 years ago in European Mediterranean countries such as Italy, Portugal and Greece. In the following sections, the building is described and the results of a preliminary assessment of its l ...
1988 Armenian earthquake
The 1988 Armenian earthquake, also known as the Spitak earthquake (Armenian: Սպիտակի երկրաշարժ Spitaki yerkrašarž) occurred in the northern region of Armenia (then part of the Soviet Union) on Wednesday, December 7, 1988 at 11:41 local time (07:41 UTC). The earthquake measured 6.8 on the surface wave magnitude scale and had a maximum perceived intensity of X (Devastating) on the Medvedev–Sponheuer–Karnik scale. The region that the earthquake occurred is vulnerable to occasional large and destructive earthquakes and is part of a larger active seismic belt that stretches from the Alps to the Himalayas. Activity in the area is associated with tectonic plate boundary interaction and the source of the event was a slip of a thrust fault just to the north of Spitak.Seismologists thoroughly studied the effects of the Spitak event, including the mainshock and aftershock fault rupture mechanisms and were on site setting up temporary seismometers before the end of 1988. Earthquake engineering experts scrutinized building construction styles and found fault in the poorly constructed apartments and other buildings that were built during the Era of Stagnation under the rule of Leonid Brezhnev. The cities of Spitak, Leninakan (Gyumri), and Kirovakan (Vanadzor) were greatly affected with large losses of life and devastating effects to buildings and other structures. A number of the smaller outlying villages away from the larger population centers were also severely affected.Despite the tensions of the Cold War, Soviet leader Mikhail Gorbachev formally asked the United States for humanitarian help within a few days of the earthquake, the first such request since World War II. One hundred and thirteen countries sent substantial amounts of humanitarian aid to the Soviet Union in the form of rescue equipment, search teams and medical supplies, but private donations and assistance from non-governmental organizations also had a large part of the international effort. While transporting some of these supplies to the region, a Soviet aircraft carrying 78 relief workers from Azerbaijan and a transport plane from Yugoslavia were both destroyed in separate incidents. In support of the relief effort, recording artists united to produce several music-related contributions for the victims of the quake. A song was produced by a duo of French composers (including Charles Aznavour) and a studio album that featured songs donated by mainstream rock bands was released from the Rock Aid Armenia effort by the British music industry.