Seismicity patterns and velocity structure of Katla volcano, Iceland
... 2000 indicate a total uplift of 12 cm. Between 2000 and 2003, 6 cm uplift is attributed to an inflation period occurring at a few kilometres depth within the caldera (Sturkell and others, 2003). The seismicity also increased during this 3 year period, but the GPS measurements of the inflation centre ...
... 2000 indicate a total uplift of 12 cm. Between 2000 and 2003, 6 cm uplift is attributed to an inflation period occurring at a few kilometres depth within the caldera (Sturkell and others, 2003). The seismicity also increased during this 3 year period, but the GPS measurements of the inflation centre ...
Horizontal thermal contraction of oceanic lithosphere: The ultimate
... lithospheric age. Dotted line: the age (0.78 Ma before present) for the old edge of the central anomaly. Dashed line: the age (3.2 Ma before present) for the middle of marine magnetic anomaly 2A, which was used in estimating the NUVEL-1A global set of relative plate angular velocities. Because of th ...
... lithospheric age. Dotted line: the age (0.78 Ma before present) for the old edge of the central anomaly. Dashed line: the age (3.2 Ma before present) for the middle of marine magnetic anomaly 2A, which was used in estimating the NUVEL-1A global set of relative plate angular velocities. Because of th ...
Earthquakes, Existing Buildings and Seismic Design Codes in
... These basic weaknesses stemming from many different design and construction errors are main reasons of the catastrophic consequences experienced after earthquakes. These errors, which cause premature failures of structural members or structures, are basically due to improper application practices on ...
... These basic weaknesses stemming from many different design and construction errors are main reasons of the catastrophic consequences experienced after earthquakes. These errors, which cause premature failures of structural members or structures, are basically due to improper application practices on ...
Probabilistic prediction of rupture length, slip and
... relationship between seismic slip and rupture length. We find that the larger the present slip amplitude Dp , the higher is the probability for the continuation of a rupture and the evolution into a ‘Big One’, that is, a long remaining rupture length Lr (Yamada 2007). We also find that the Dp –Lr re ...
... relationship between seismic slip and rupture length. We find that the larger the present slip amplitude Dp , the higher is the probability for the continuation of a rupture and the evolution into a ‘Big One’, that is, a long remaining rupture length Lr (Yamada 2007). We also find that the Dp –Lr re ...
Complete Paper
... A response spectrum method is straight forward graphical portrayal of unfaltering state reaction for dislodging, speed or quickening of oscillators of fluctuating normal response that are forced into motion by the same base vibration. To perform response spectrum method analysis to any building it i ...
... A response spectrum method is straight forward graphical portrayal of unfaltering state reaction for dislodging, speed or quickening of oscillators of fluctuating normal response that are forced into motion by the same base vibration. To perform response spectrum method analysis to any building it i ...
Seismicity and earthquake hazard analysis of the Teton
... nearby Teton and Hebgen Lake faults. The seismicity and the occurrence of high slip-rate late Quaternary faults in this region leads to a high level of seismic hazard that was evaluated using new earthquake catalogues determined from three-dimensional (3-D) seismic velocity models, followed by the e ...
... nearby Teton and Hebgen Lake faults. The seismicity and the occurrence of high slip-rate late Quaternary faults in this region leads to a high level of seismic hazard that was evaluated using new earthquake catalogues determined from three-dimensional (3-D) seismic velocity models, followed by the e ...
natural disasters: earthquakes
... Interpret a range of sources of geographical information, including maps, diagrams, globes, aerial photographs and Geographical Information Systems (GIS) Human and Physical Geography Understand, through the use of detailed place-based exemplars at a variety of scales, the key processes in physical g ...
... Interpret a range of sources of geographical information, including maps, diagrams, globes, aerial photographs and Geographical Information Systems (GIS) Human and Physical Geography Understand, through the use of detailed place-based exemplars at a variety of scales, the key processes in physical g ...
Are earthquakes predictable? - San Andreas UCLA Seismic
... not be interpreted as a statement that any further attempts to mitigate the destructive effects of earthquakes are futile. The seismic-moment conservation principle, when combined with geodetic deformation data, offers a new way to evaluate the seismic hazard, not only for tectonic plate boundaries, ...
... not be interpreted as a statement that any further attempts to mitigate the destructive effects of earthquakes are futile. The seismic-moment conservation principle, when combined with geodetic deformation data, offers a new way to evaluate the seismic hazard, not only for tectonic plate boundaries, ...
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 ...
SEISMIC ASSESSMENT AND REHABILITATION OF
... building be safe against loss of life or against collapse? Does the building need to be occupied immediately following an earthquake, or do operations within the structure need to be maintained? Are there critical non-structural components (electrical, plumbing, heating, ventilating, partitions, etc ...
... building be safe against loss of life or against collapse? Does the building need to be occupied immediately following an earthquake, or do operations within the structure need to be maintained? Are there critical non-structural components (electrical, plumbing, heating, ventilating, partitions, etc ...
Change of crustal gravitational potential energy in the Taiwan
... The active convergence between the northwest corner of the Philippine Sea Plate and the southeast margin of the Eurasian Plate has given rise to the Taiwan mountain-building and produced numerous earthquakes. Among the earthquakes, the 1999 Chi-Chi earthquake is the largest one recorded in the centu ...
... The active convergence between the northwest corner of the Philippine Sea Plate and the southeast margin of the Eurasian Plate has given rise to the Taiwan mountain-building and produced numerous earthquakes. Among the earthquakes, the 1999 Chi-Chi earthquake is the largest one recorded in the centu ...
Link to Curriculum Vitae
... Elected as a Fellow to Geological Society of America, 2009 Elected as a Fellow of the American Geophysical Union, 2010 Geological Society of America, International Section, management board, 2008-2011. ...
... Elected as a Fellow to Geological Society of America, 2009 Elected as a Fellow of the American Geophysical Union, 2010 Geological Society of America, International Section, management board, 2008-2011. ...
Advanced Retrofitting Methods and Techniques for RC
... to the others. This paper [16] concludes that to identify an efficient retrofitting method for existing open ground storey RC frame buildings. A two dimensional RC frame is designed with nonductile. Detailing is subjected to nonlinear static pushover analysis. The RC frame is retrofitted by three me ...
... to the others. This paper [16] concludes that to identify an efficient retrofitting method for existing open ground storey RC frame buildings. A two dimensional RC frame is designed with nonductile. Detailing is subjected to nonlinear static pushover analysis. The RC frame is retrofitted by three me ...
A mechanism for preseismic steady rupture fronts observed in
... models and laboratory observations remain quite challenging due to difficulties in accurately monitoring the transitional behavior in laboratory friction experiments and in reproducing the laboratory observations in numerical simulations that incorporate appropriate friction laws. [3] Several labora ...
... models and laboratory observations remain quite challenging due to difficulties in accurately monitoring the transitional behavior in laboratory friction experiments and in reproducing the laboratory observations in numerical simulations that incorporate appropriate friction laws. [3] Several labora ...
Cost Modeling of Reinforced Concrete Buildings Designed for
... and loading characteristics including the importance of the building based on its utility. The structural configuration which is evolved from architectural and functional requirements refers to the overall building geometry, column spacing with the resulting beam spans and slab systems. The loading ...
... and loading characteristics including the importance of the building based on its utility. The structural configuration which is evolved from architectural and functional requirements refers to the overall building geometry, column spacing with the resulting beam spans and slab systems. The loading ...
1992 Cape Mendocino earthquakes
The 1992 Cape Mendocino earthquakes (or 1992 Petrolia earthquakes) occurred along the Lost Coast of Northern California on April 25 and 26. The three largest events were the M7.2 thrust mainshock that struck near the unincorporated community of Petrolia midday on April 25 and two primary strike-slip aftershocks measuring 6.5 and 6.6 that followed early the next morning. The sequence encompassed both interplate and intraplate activity that was associated with the Mendocino Triple Junction, a complex system of three major faults (including the Cascadia subduction zone, San Andreas Fault, and Mendocino Fracture Zone) that converge near Cape Mendocino. The total number of aftershocks that followed the events exceeded 2,000.The three shocks damaged and destroyed homes and businesses in Humboldt County and injured 356 people, but the single largest loss was due to a post-earthquake fire that consumed a business center in Scotia. Accelerometers that had been in place in the Cape Mendocino area since the late 1970s recorded the event and the readings were moderate to strong, with the exception of the instruments closest to the epicenter, which went off scale a few seconds into the recording. No surface ruptures were present in the epicentral area, but landslides closed roads and railroad tracks for at least a week while cleanup took place. Also discovered was about 1 m (3 ft 3 in) of coastal uplift near Cape Mendocino and Punta Gorda.As the largest earthquake in California since the 1989 Loma Prieta event several years earlier, the mainshock caused a non-destructive tsunami that quickly reached the coast, and eventually Alaska and Hawaii several hours later. The tsunami was significant not because of its run-up, but because of the speed with which it reached the coast and for how long the waves persisted. Other strong earthquakes have affected the same area, with some that were clearly associated with the (interplate) Mendocino Fracture Zone, and others (like the two shocks on April 26) were intraplate earthquakes that ruptured within the Gorda Plate, but events that are unequivocally associated with the Cascadia subduction zone are very infrequent.