Souces and scenarios for tsunami hazard assessment in the
... debris flow occurring on the Ebro margin about 11500 cal yr BP ...
... debris flow occurring on the Ebro margin about 11500 cal yr BP ...
Seminar on b-value (PDF 0.2 MB)
... Changes in b or β towards higher magnitudes may result from the inability of fault dimensions, notably W, to keep growing indefinitely with the increasing earthquake size. A significant increase in b is observed around M=7.3 or around M0=1027 dyne-cm (Pacheco et al., 1992) is interpreted as express ...
... Changes in b or β towards higher magnitudes may result from the inability of fault dimensions, notably W, to keep growing indefinitely with the increasing earthquake size. A significant increase in b is observed around M=7.3 or around M0=1027 dyne-cm (Pacheco et al., 1992) is interpreted as express ...
Earthquake prediction Earthquake prediction: animals?
... 2987–3298, 3164–3392, 3654–4569, 3989–4284!yrs ago from A.D.!2010 datum) were correlated among two or more cores during this time period, suggesting an average return period of strong shaking from earthquakes of about 220!yr. Nine of the DFDs overlap with the age ranges for great plate-boundary eart ...
... 2987–3298, 3164–3392, 3654–4569, 3989–4284!yrs ago from A.D.!2010 datum) were correlated among two or more cores during this time period, suggesting an average return period of strong shaking from earthquakes of about 220!yr. Nine of the DFDs overlap with the age ranges for great plate-boundary eart ...
Science_Barcelona_final24july - Nearest
... difficult to distinguish between the Miocene and the Quaternary features and processes and it was not possible to know the lateral extent of the main active faults because a detailed map of the seafloor was lacking. The physiography of the Gulf of Cadiz (Figs. 2 and 3) is dominated by i) deep basins ...
... difficult to distinguish between the Miocene and the Quaternary features and processes and it was not possible to know the lateral extent of the main active faults because a detailed map of the seafloor was lacking. The physiography of the Gulf of Cadiz (Figs. 2 and 3) is dominated by i) deep basins ...
Damage estimation of expansion joint by collision between girders
... consist of the expansion joint, concrete floor slab and steel girder, by using the 3dimensional finite element method. To be more precise, the damage level of the expansion joint and concrete slab is simulated. From the numerical analyses, the finger part of the expansion joints is lifted up from ab ...
... consist of the expansion joint, concrete floor slab and steel girder, by using the 3dimensional finite element method. To be more precise, the damage level of the expansion joint and concrete slab is simulated. From the numerical analyses, the finger part of the expansion joints is lifted up from ab ...
Seismic structure of the subducting seamounts on the trench axis:... Seamount and Daiichi-Kashima Seamount, northern
... Japan Meteorological Agency. Focal mechanisms of the earthquakes shallower than 50 km during July 1976–2008 are from the Harvard centroid-moment tensor (CMT) catalog. Seafloor topography is based on multi-beam swath bathymetric data. ...
... Japan Meteorological Agency. Focal mechanisms of the earthquakes shallower than 50 km during July 1976–2008 are from the Harvard centroid-moment tensor (CMT) catalog. Seafloor topography is based on multi-beam swath bathymetric data. ...
Earthquakes, Plate Boundaries, and Depth Indiana Standard
... Students will use the world map with ocean floor age and plate tectonic overlays to assess and correlate earthquake data. Assignments and/or questions for Review: • Is there any relationship between earthquake depth and ocean floor age? If so explain the relationship. • Do any of the earthquakes doc ...
... Students will use the world map with ocean floor age and plate tectonic overlays to assess and correlate earthquake data. Assignments and/or questions for Review: • Is there any relationship between earthquake depth and ocean floor age? If so explain the relationship. • Do any of the earthquakes doc ...
Extracting seismic core phases with array interferometry
... phases, the ability to extract robust ScS and PKIKP2 phases between stations seems to be mostly independent of earthquake location (Figure 3b). This suggests that both station- and source-side interferometry may be important, with earthquake body-wave energy becoming partly diffuse after multiple bo ...
... phases, the ability to extract robust ScS and PKIKP2 phases between stations seems to be mostly independent of earthquake location (Figure 3b). This suggests that both station- and source-side interferometry may be important, with earthquake body-wave energy becoming partly diffuse after multiple bo ...
Seismological structure of subduction zones and its implications for
... (Sugihara, 1960). In addition, these volcanoes lie approximately 100 km above the Wadati–Benioff deep seismic zone within the subducting slab (Hasegawa et al., 1978; Tatsumi, 1989; Zhao et al., 1997a,b). These constraints are quite robust, and any model hoping to explain subduction zone volcanism mu ...
... (Sugihara, 1960). In addition, these volcanoes lie approximately 100 km above the Wadati–Benioff deep seismic zone within the subducting slab (Hasegawa et al., 1978; Tatsumi, 1989; Zhao et al., 1997a,b). These constraints are quite robust, and any model hoping to explain subduction zone volcanism mu ...
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.