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 ...
2002/005 OFFSHORE TECHNOLOGY REPORT Seismic hazard: UK continental shelf
... Laurussia, which rearranged the regional setting such that North of the Central European subduction zone a foredeep developed. This extended far into the Southern North Sea. Late Variscan movements modified the area, particulary East of the London-Brabant Platform. Reconstruction of the general area ...
... Laurussia, which rearranged the regional setting such that North of the Central European subduction zone a foredeep developed. This extended far into the Southern North Sea. Late Variscan movements modified the area, particulary East of the London-Brabant Platform. Reconstruction of the general area ...
Development and Application of Stochastic Models of Earthquake
... occurrence of seismic swarms is mainly ascribed to intrusion of magma (in volcanic zones) or fluids and to following redistribution of stress, caused by reduction of the resistance of faults [Kisslinger, 1975; Noir et al., 1997]. In contrast to mainshock-aftershocks sequences, earthquake swarms are ...
... occurrence of seismic swarms is mainly ascribed to intrusion of magma (in volcanic zones) or fluids and to following redistribution of stress, caused by reduction of the resistance of faults [Kisslinger, 1975; Noir et al., 1997]. In contrast to mainshock-aftershocks sequences, earthquake swarms are ...
Observing spatio-temporal clustering and separation using
... works report that both interevent distances or “jumps” between earthquake epicentres (Davidsen and Paczuski, 2005; Corral, 2006) and the interevent times, or return times (Bak et al., 2002; Corral, 2004), exhibit statistical distributions involving power-law regimes, revealing the complex spatiotemp ...
... works report that both interevent distances or “jumps” between earthquake epicentres (Davidsen and Paczuski, 2005; Corral, 2006) and the interevent times, or return times (Bak et al., 2002; Corral, 2004), exhibit statistical distributions involving power-law regimes, revealing the complex spatiotemp ...
Dynamic parameters of structures extracted from ambient
... Modelling techniques using the Finite Element Method (e.g. [15, 30]) and homogenization [9] can be found in literature. The updating procedure can use only the first frequency to check if the others are well represented by the model or all the measured modal parameters. In this paper, we use simple ...
... Modelling techniques using the Finite Element Method (e.g. [15, 30]) and homogenization [9] can be found in literature. The updating procedure can use only the first frequency to check if the others are well represented by the model or all the measured modal parameters. In this paper, we use simple ...
Operational Earthquake Forecasting
... vary over orders of magnitude but typically remain low in an absolute sense (< 1% per day). Translating such low-probability forecasts into effective decision-making is a difficult challenge. Reports on the current utilization operational forecasting in earthquake risk management were compiled for s ...
... vary over orders of magnitude but typically remain low in an absolute sense (< 1% per day). Translating such low-probability forecasts into effective decision-making is a difficult challenge. Reports on the current utilization operational forecasting in earthquake risk management were compiled for s ...
Dynamic triggering: The effects of remote earthquakes on volcanoes
... Under certain circumstances earthquakes can, however, be triggered or induced by external influences. For example, Miller [2008] comments on various effects of heavy rainfall as a trigger for earthquakes through increased pore pressure at depth. In Enhanced Geothermal Systems small earthquakes are d ...
... Under certain circumstances earthquakes can, however, be triggered or induced by external influences. For example, Miller [2008] comments on various effects of heavy rainfall as a trigger for earthquakes through increased pore pressure at depth. In Enhanced Geothermal Systems small earthquakes are d ...
Rapid Visual Screening for Seismic Evaluation of Existing Buildings
... 60% of landmass in India is under moderate to severe earthquake prone area. BiharNepal border (M6.4) in 1988, Uttarkashi, Uttaranchal (M6.6) in 1991, Latur, Maharastra (M6.3) in 1993, Jabalpur, Madhya Pradesh (M6.0) in 1997, Chamoli, Uttaranchal (M6.8) in 1999, Bhuj, Gujarat (Mw7.7) in 2001 and Muzz ...
... 60% of landmass in India is under moderate to severe earthquake prone area. BiharNepal border (M6.4) in 1988, Uttarkashi, Uttaranchal (M6.6) in 1991, Latur, Maharastra (M6.3) in 1993, Jabalpur, Madhya Pradesh (M6.0) in 1997, Chamoli, Uttaranchal (M6.8) in 1999, Bhuj, Gujarat (Mw7.7) in 2001 and Muzz ...
Deliverable 3.2 - version 2 - Website for the dissemination of long
... 1. SHEEC was first released on 13 April 2011, as deliverable D3.2 of the Project. The catalogue was made available as two separate files: a) the 1000-1899 portion (SHEEC_1000-1899_v1.xls), published on the Task 3.1 webpage http://www.emidius.eu/SHARE/task3_1/, under the Partner Area section; b) the ...
... 1. SHEEC was first released on 13 April 2011, as deliverable D3.2 of the Project. The catalogue was made available as two separate files: a) the 1000-1899 portion (SHEEC_1000-1899_v1.xls), published on the Task 3.1 webpage http://www.emidius.eu/SHARE/task3_1/, under the Partner Area section; b) the ...
Analysis of Various Thicknesses of Shear Wall with
... side-sway. When shear walls are stiff enough, they will prevent floor and roof framing members from moving off their supports. Also, buildings that are s ufficiently stiff will usually suffer less non-structural damage. When shear walls are strong enough, then capable of transferring lateral forces ...
... side-sway. When shear walls are stiff enough, they will prevent floor and roof framing members from moving off their supports. Also, buildings that are s ufficiently stiff will usually suffer less non-structural damage. When shear walls are strong enough, then capable of transferring lateral forces ...
Spatiotemporal relationships between earthquakes of the Mid
... Europe (43oN to 54oN) exhibits diffuse seismicity with the largest known earthquakes rarely greater than magnitude 4 (Tesauro et al., 2006). This seismicity seems to be concentrated on old zones of weakness that are reactivated by the present-day stress field (Ziegler, 1992). A large number of the e ...
... Europe (43oN to 54oN) exhibits diffuse seismicity with the largest known earthquakes rarely greater than magnitude 4 (Tesauro et al., 2006). This seismicity seems to be concentrated on old zones of weakness that are reactivated by the present-day stress field (Ziegler, 1992). A large number of the e ...
Slab temperature controls on the Tonga double
... central parts of the study area (Fig. 2). The existence of the DSZ is further demonstrated by plotting the number of earthquakes as a function of the depth normal to the slab surface along each cross section (Fig. 3A). In the northernmost region (A-A′), where there are few local seismic stations, th ...
... central parts of the study area (Fig. 2). The existence of the DSZ is further demonstrated by plotting the number of earthquakes as a function of the depth normal to the slab surface along each cross section (Fig. 3A). In the northernmost region (A-A′), where there are few local seismic stations, th ...
Change of crustal gravitational potential energy in the Taiwan
... from the catalog of BATS [17] (Fig. 4a), the crust was going up and down during the Chi-Chi earthquake sequence. It indicates that earthquakes occurring in a compressive mountain-building zone are not all thrusting in mechanism. However, the overall calculated crustal GPE change due to the Chi-Chi e ...
... from the catalog of BATS [17] (Fig. 4a), the crust was going up and down during the Chi-Chi earthquake sequence. It indicates that earthquakes occurring in a compressive mountain-building zone are not all thrusting in mechanism. However, the overall calculated crustal GPE change due to the Chi-Chi e ...
Quaternary
... non・volcanic outer arc and a volcanic inner arc. The boundaly between the non・volcanic outer arc and volcanic inner arc is the front of volcanic belt or volcanic front(Sugimura, 1960),which runs parallel with the trench at the distance of 100−300 km from the axis of the trench. ...
... non・volcanic outer arc and a volcanic inner arc. The boundaly between the non・volcanic outer arc and volcanic inner arc is the front of volcanic belt or volcanic front(Sugimura, 1960),which runs parallel with the trench at the distance of 100−300 km from the axis of the trench. ...
Source mechanisms of dike-induced earthquakes in the Dabbahu
... possibility of complex source mechanisms during dike emplacement, we solved for four different source models: double couple (DC), DC + isotropic (DC + ISO), deviatoric (DVMT), and full moment tensor (FMT). The solutions obtained using the different models indicate that the earthquakes have non-doubl ...
... possibility of complex source mechanisms during dike emplacement, we solved for four different source models: double couple (DC), DC + isotropic (DC + ISO), deviatoric (DVMT), and full moment tensor (FMT). The solutions obtained using the different models indicate that the earthquakes have non-doubl ...
Creeping along the Ismetpasa section of the North Anatolian fault
... have usable data (Fig. 4). One of the main restrictions on obtaining high-quality interferograms is the temporal decorrelation resulting from changes in the target scene due to erosion, vegetation, cultivation, seasonal fluctuation of water content, etc. For example, coherence is completely lost in ...
... have usable data (Fig. 4). One of the main restrictions on obtaining high-quality interferograms is the temporal decorrelation resulting from changes in the target scene due to erosion, vegetation, cultivation, seasonal fluctuation of water content, etc. For example, coherence is completely lost in ...
6 Source Characterization
... estimate the magnitude of largest earthquakes that could occur on a source. For areal sources, the estimation of the maximum magnitude has traditionally been computed by considering the largest historical earthquake in the source zone and adding some additional value (e.g. half magnitude unit). For ...
... estimate the magnitude of largest earthquakes that could occur on a source. For areal sources, the estimation of the maximum magnitude has traditionally been computed by considering the largest historical earthquake in the source zone and adding some additional value (e.g. half magnitude unit). For ...
Earthquake swarm and b-value characterization of the Yellowstone
... the earthquakes in the catalog have magnitudes less than or equal to MC = 4.0; 99.1% have MC ≤ 3.0; 91.2% have MC ≤ 2.0; and 53.6% have MC ≤ 1.0. Because of the importance of high quality locations and wellconstrained magnitudes in calculating b-values, only A, B, or C quality events were used becau ...
... the earthquakes in the catalog have magnitudes less than or equal to MC = 4.0; 99.1% have MC ≤ 3.0; 91.2% have MC ≤ 2.0; and 53.6% have MC ≤ 1.0. Because of the importance of high quality locations and wellconstrained magnitudes in calculating b-values, only A, B, or C quality events were used becau ...
Specification for Buildings to be Built in Seismic Zones (2007
... with special system and equipment between foundation and soil for the purpose of isolating the building structural system from the earthquake motion, and to buildings incorporating other active and passive control systems. 1.1.7 – Requirements to be applied to structures which are outside the scope ...
... with special system and equipment between foundation and soil for the purpose of isolating the building structural system from the earthquake motion, and to buildings incorporating other active and passive control systems. 1.1.7 – Requirements to be applied to structures which are outside the scope ...
Earthquake processes of the Himalayan collision zone in eastern
... range in magnitude from M L 2.0–5.0 and have hypocentres in three distinct spatial groups (Fig. 2) (Monsalve et al. 2006). The first group is a narrow band of earthquakes at hypocentral depths <20 km following the curved Himalayan front. The same pattern was observed with the microearthquakes record ...
... range in magnitude from M L 2.0–5.0 and have hypocentres in three distinct spatial groups (Fig. 2) (Monsalve et al. 2006). The first group is a narrow band of earthquakes at hypocentral depths <20 km following the curved Himalayan front. The same pattern was observed with the microearthquakes record ...
federal emergency
... 1990. 52 pages. This Guidebook is designed to assist the school community of principal, teachers, staff, parents, and students in developing an earthquake safety program for their school. Topics addressed include hazard identification, earthquake drills, immediate response and care requirements, com ...
... 1990. 52 pages. This Guidebook is designed to assist the school community of principal, teachers, staff, parents, and students in developing an earthquake safety program for their school. Topics addressed include hazard identification, earthquake drills, immediate response and care requirements, com ...
Interface Locking of Subduction Zone near Costa Rica using
... around the active tectonic environment of megathrust region. Conceptually, recorded tremor signal is semi-analogous and ‘noise-like’ earthquake signal, in which lowfrequency (1-15 Hz) energy is more weighted than high-frequency energy [Gomberg, 2010, Peng and Gomberg, 2010]. Tremor is usually discov ...
... around the active tectonic environment of megathrust region. Conceptually, recorded tremor signal is semi-analogous and ‘noise-like’ earthquake signal, in which lowfrequency (1-15 Hz) energy is more weighted than high-frequency energy [Gomberg, 2010, Peng and Gomberg, 2010]. Tremor is usually discov ...
Proposal_Yan - Geophysics at Georgia Tech
... around the active tectonic environment of megathrust region. Conceptually, recorded tremor signal is semi-analogous and ‘noise-like’ earthquake signal, in which lowfrequency (1-15 Hz) energy is more weighted than high-frequency energy [Gomberg, 2010, Peng and Gomberg, 2010]. Tremor is usually discov ...
... around the active tectonic environment of megathrust region. Conceptually, recorded tremor signal is semi-analogous and ‘noise-like’ earthquake signal, in which lowfrequency (1-15 Hz) energy is more weighted than high-frequency energy [Gomberg, 2010, Peng and Gomberg, 2010]. Tremor is usually discov ...
A survey of methods and techniques used for Seismic retrofitting of
... With particular records based on earthquake occurrence, the consequences are loss of human lives and destruction of properties, which ultimately affects the natural economy. The occurrence of an earthquake cannot be predicted and prevented but the preparedness of the structures to resist earthquake ...
... With particular records based on earthquake occurrence, the consequences are loss of human lives and destruction of properties, which ultimately affects the natural economy. The occurrence of an earthquake cannot be predicted and prevented but the preparedness of the structures to resist earthquake ...
1570 Ferrara earthquake
The 1570 Ferrara earthquake struck the Italian city of Ferrara on November 16 and 17, 1570. After the initial shocks, an earthquake swarm continued for four years, with over 2000 aftershocks concentrated from November 1570 to February 1571.The same area was struck, centuries later, by another major earthquake of comparable intensity.The disaster destroyed half the city, permanently marked many of the buildings left standing, and directly contributed to – but was not the sole cause of – a long-term decline of the city lasting until the 19th century.The earthquake caused the first documented episode of soil liquefaction in the Po Valley, and one of the oldest occurrences of the event known outside of paleoseismology. It led to the establishment of an earthquake observatory which published to very high regard, and the drafting of some of the first-known building designs based on a scientific seismic-resistant approach.