2002/005 OFFSHORE TECHNOLOGY REPORT Seismic hazard: UK continental shelf
... The Late Caledonian Orogeny completed a basic change in plate geometry. On closure of the Iapetus Ocean and the Tornquist Sea, the Caledonian fold belt, which covered most of the North Sea area, came into existence. In the Southwest, the London-Brabant Massif became the dominating tectonic element. ...
... The Late Caledonian Orogeny completed a basic change in plate geometry. On closure of the Iapetus Ocean and the Tornquist Sea, the Caledonian fold belt, which covered most of the North Sea area, came into existence. In the Southwest, the London-Brabant Massif became the dominating tectonic element. ...
Operational Earthquake Forecasting
... information about time-dependent seismic hazards to help communities prepare for potentially destructive earthquakes. On short time scales of days and weeks, earthquake sequences show clustering in space and time, as indicated by the aftershocks triggered by large events. Statistical descriptions of ...
... information about time-dependent seismic hazards to help communities prepare for potentially destructive earthquakes. On short time scales of days and weeks, earthquake sequences show clustering in space and time, as indicated by the aftershocks triggered by large events. Statistical descriptions of ...
A probabilistic seismic hazard assessment of the Trans
... exhaustive search of the seismic databases. Thus the data were culled from the catalogs of the International Seismological Centre (ISC), the U.S. Geological Survey (USGS), the Global Centroid Moment Tensor Catalog (CMT), and of the Servicio Sismológico Nacional (SSN) were consulted. Duplications and ...
... exhaustive search of the seismic databases. Thus the data were culled from the catalogs of the International Seismological Centre (ISC), the U.S. Geological Survey (USGS), the Global Centroid Moment Tensor Catalog (CMT), and of the Servicio Sismológico Nacional (SSN) were consulted. Duplications and ...
Earthquake Energy Release Mechanism Ahmed Elgamal
... The single enormous ocean which surrounded Pangaea is known as Panthalassa. The breaking up and formation of supercontinents appears to be cyclical ...
... The single enormous ocean which surrounded Pangaea is known as Panthalassa. The breaking up and formation of supercontinents appears to be cyclical ...
Observations and Tectonic Setting of Historic
... A catalog of 383 earthquakes in southeastern New York, southwestern Connecticut, northern New Jersey, and eastern Pennsylvania, including metropolitan New York City and Philadelphia, is compiled from historical and instrumental data from 1677 through 2006. A magnitude-felt area relationship is used ...
... A catalog of 383 earthquakes in southeastern New York, southwestern Connecticut, northern New Jersey, and eastern Pennsylvania, including metropolitan New York City and Philadelphia, is compiled from historical and instrumental data from 1677 through 2006. A magnitude-felt area relationship is used ...
Earthquake scaling relations for mid
... matical notation (see notation section). We then proceed with our own analysis, in which we derive new scaling relations based on areal measures of faulting. We conclude by using these relations to comment on the basic issues laid out in this introduction. ...
... matical notation (see notation section). We then proceed with our own analysis, in which we derive new scaling relations based on areal measures of faulting. We conclude by using these relations to comment on the basic issues laid out in this introduction. ...
Seismicity models based on Coulomb stress calculations
... stress perturbations are resolved. Two approaches are commonly adopted; the first one relies on resolving stress changes onto a prescribed faulting mechanism (that is, to assign strike, dip and rake angles of the target faults). This means that fault geometry and slip direction are input parameters ...
... stress perturbations are resolved. Two approaches are commonly adopted; the first one relies on resolving stress changes onto a prescribed faulting mechanism (that is, to assign strike, dip and rake angles of the target faults). This means that fault geometry and slip direction are input parameters ...
102_2012_Wang_et_al_.. - Description
... mitigate potential earthquake hazards in Taiwan. The Central Geological Survey, Taiwan, has launched the investigation into active faults on the island, and the results have been published with periodical updates (Lin et al. 2008, 2009). Other studies, including the probabilistic seismic hazard anal ...
... mitigate potential earthquake hazards in Taiwan. The Central Geological Survey, Taiwan, has launched the investigation into active faults on the island, and the results have been published with periodical updates (Lin et al. 2008, 2009). Other studies, including the probabilistic seismic hazard anal ...
Entire paper as a 2 MB file
... We use the Harvard CMT catalog to separate ocean-ridge seismicity into spreading and transform sub-catalogs. We use the tapered Gutenberg-Richter distribution to estimate the total seismic moment rates of plate-boundary zones from limited catalogs of large events. We present the plate boundary model ...
... We use the Harvard CMT catalog to separate ocean-ridge seismicity into spreading and transform sub-catalogs. We use the tapered Gutenberg-Richter distribution to estimate the total seismic moment rates of plate-boundary zones from limited catalogs of large events. We present the plate boundary model ...
Plate Tectonics and Earthquake Potential of Spreading Ridges and
... We use the Harvard CMT catalog to separate ocean-ridge seismicity into spreading and transfonn sub-catalogs. We use the tapered Gutenberg-Richter distribution to estimate the total seismic moment rates of plate-boundary zones from limited catalogs of large events. We present the plate boundary model ...
... We use the Harvard CMT catalog to separate ocean-ridge seismicity into spreading and transfonn sub-catalogs. We use the tapered Gutenberg-Richter distribution to estimate the total seismic moment rates of plate-boundary zones from limited catalogs of large events. We present the plate boundary model ...
Proposal_Yan - Geophysics at Georgia Tech
... the uplifted batholith structure beneath the continental crust is intruded by subducting oceanic plate after the main shock. It appears that these authors obtained an opposite results compared with previous research on b-values. In my opinion, the swarm of ...
... the uplifted batholith structure beneath the continental crust is intruded by subducting oceanic plate after the main shock. It appears that these authors obtained an opposite results compared with previous research on b-values. In my opinion, the swarm of ...
Interface Locking of Subduction Zone near Costa Rica using
... the uplifted batholith structure beneath the continental crust is intruded by subducting oceanic plate after the main shock. It appears that these authors obtained an opposite results compared with previous research on b-values. In my opinion, the swarm of ...
... the uplifted batholith structure beneath the continental crust is intruded by subducting oceanic plate after the main shock. It appears that these authors obtained an opposite results compared with previous research on b-values. In my opinion, the swarm of ...
OUTER RISE SEISMICITY OF THE SUBDUCTING NAZCA PLATE
... down to 50 km depth is the stage of the water cycle that may affect plate interface slip and other shallow subduction zone processes [ Jarrard, 2003; Shelly et al., 2006; Audet et al., 2009; Emry et al., 2014]. In intermediate depth dehydration (50 - 100 km), water expels from the lower crustal laye ...
... down to 50 km depth is the stage of the water cycle that may affect plate interface slip and other shallow subduction zone processes [ Jarrard, 2003; Shelly et al., 2006; Audet et al., 2009; Emry et al., 2014]. In intermediate depth dehydration (50 - 100 km), water expels from the lower crustal laye ...
PDF version - Bullard Laboratories
... The presence of high-impedance-contrast layering relating to nearsource sediments and the overlying water layer, and the multiples that result from both, make interpretation of the observed phases for body-wave data, particularly P-wave data, complex, as the correct identification of phases is often ...
... The presence of high-impedance-contrast layering relating to nearsource sediments and the overlying water layer, and the multiples that result from both, make interpretation of the observed phases for body-wave data, particularly P-wave data, complex, as the correct identification of phases is often ...
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 ...
Chapter 5: EARTHQUAKE RISK
... losses associated with the building and contents damage caused by earthquake ground shaking, excluding the impacts from other secondary hazards such as soil liquefaction, fire, landslides and surface faulting. The study has adopted a probabilistic approach that makes allowances for the variability t ...
... losses associated with the building and contents damage caused by earthquake ground shaking, excluding the impacts from other secondary hazards such as soil liquefaction, fire, landslides and surface faulting. The study has adopted a probabilistic approach that makes allowances for the variability t ...
Uncovering the relationship between subducting
... Here we capitalise on the establishment of a number of global digital datasets to develop a quantitative link between some of these asperities and the generation of significant subduction earthquakes (significant earthquakes are defined to be those with moment magnitudes larger than 5.0). In particu ...
... Here we capitalise on the establishment of a number of global digital datasets to develop a quantitative link between some of these asperities and the generation of significant subduction earthquakes (significant earthquakes are defined to be those with moment magnitudes larger than 5.0). In particu ...
Hypocenter depths of large interplate earthquakes and their relation
... use 26 interplate earthquakes with Mw v 7.5 (Table 1), because their rupture areas cover nearly the entire seismogenic zone. In the present analysis, the rupture areas for most earthquakes were estimated from their aftershock areas. For the 1944 Tonankai, the 1946 Nankai, and the 1996 and 2001 Peruv ...
... use 26 interplate earthquakes with Mw v 7.5 (Table 1), because their rupture areas cover nearly the entire seismogenic zone. In the present analysis, the rupture areas for most earthquakes were estimated from their aftershock areas. For the 1944 Tonankai, the 1946 Nankai, and the 1996 and 2001 Peruv ...
A BENEFIT/COST ANALYSIS FOR THE SEISMIC REHABILITATION
... losses throughout history. Although much improvement in earthquake resistant design has been achieved, people still suffer from the consequences of such a disaster even in the developed countries. The 1994 Northridge and 1995 Kobe earthquakes clearly proved that mother nature is still superior to ma ...
... losses throughout history. Although much improvement in earthquake resistant design has been achieved, people still suffer from the consequences of such a disaster even in the developed countries. The 1994 Northridge and 1995 Kobe earthquakes clearly proved that mother nature is still superior to ma ...
Dynamic response of reinforced masonry columns in classical
... resistant (Psycharis et al. [5]), which is also proven from the fact that many classical monuments built in seismic prone areas have survived for almost 2500 years. However, many others have collapsed. In general, the vulnerability of ancient monuments to earthquakes depends on two main parameters ( ...
... resistant (Psycharis et al. [5]), which is also proven from the fact that many classical monuments built in seismic prone areas have survived for almost 2500 years. However, many others have collapsed. In general, the vulnerability of ancient monuments to earthquakes depends on two main parameters ( ...
evidence of basin-and-range extensional tectonics in the sierra
... geothermal area, characterized by Quaternary rhyolite and high heat flow (e.g., Duffield et al., 1980), is 30 km east of the swarm area. A few lava flows of Tertiary age have been documented within the southern Sierra Nevada, including the Golden Trout Creek flow, an unglaciated and, thus, presumabl ...
... geothermal area, characterized by Quaternary rhyolite and high heat flow (e.g., Duffield et al., 1980), is 30 km east of the swarm area. A few lava flows of Tertiary age have been documented within the southern Sierra Nevada, including the Golden Trout Creek flow, an unglaciated and, thus, presumabl ...
Seismic vulnerability of the Himalayan half-dressed rubble
... offices, health care units, etc. The aim of the experimental study was to understand the damage mechanism of the model, develop damage scale towards deformation-based assessment and retrieve the lateral force-deformation response of the model besides its elastic dynamic properties, i.e. fundamental ...
... offices, health care units, etc. The aim of the experimental study was to understand the damage mechanism of the model, develop damage scale towards deformation-based assessment and retrieve the lateral force-deformation response of the model besides its elastic dynamic properties, i.e. fundamental ...
Subducted seafloor relief stops rupture in South American great
... segmentation, the statistical significance of these observations had hitherto not been ...
... segmentation, the statistical significance of these observations had hitherto not been ...
Tectonics - Teesdale School
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Earthquake Disaster Guidelines - National Disaster Management
... These consultations included representatives of various central ministries and departments, scientific and technical institutions, academics, technocrats, architects and humanitarian organizations. The first such meeting was held on 21 December 05. It reviewed the status of earthquake management eff ...
... These consultations included representatives of various central ministries and departments, scientific and technical institutions, academics, technocrats, architects and humanitarian organizations. The first such meeting was held on 21 December 05. It reviewed the status of earthquake management eff ...
April 2015 Nepal earthquake
The April 2015 Nepal earthquake (also known as the Gorkha earthquake) killed more than 9,000 people and injured more than 23,000. It occurred at 11:56 NST on 25 April, with a magnitude of 7.8Mw or 8.1Ms and a maximum Mercalli Intensity of IX (Violent). Its epicenter was east of the district of Lamjung, and its hypocenter was at a depth of approximately 8.2 km (5.1 mi). It was the worst natural disaster to strike Nepal since the 1934 Nepal–Bihar earthquake.The earthquake triggered an avalanche on Mount Everest, killing at least 19, making April 25, 2015 the deadliest day on the mountain in history. The earthquake triggered another huge avalanche in the Langtang valley, where 250 people were reported missing.Hundreds of thousands of people were made homeless with entire villages flattened, across many districts of the country. Centuries-old buildings were destroyed at UNESCO World Heritage sites in the Kathmandu Valley, including some at the Kathmandu Durbar Square, the Patan Durbar Square, the Bhaktapur Durbar Square, the Changu Narayan Temple and the Swayambhunath Stupa. Geophysicists and other experts had warned for decades that Nepal was vulnerable to a deadly earthquake, particularly because of its geology, urbanization, and architecture.Continued aftershocks occurred throughout Nepal at the intervals of 15–20 minutes, with one shock reaching a magnitude of 6.7 on 26 April at 12:54:08 NST. The country also had a continued risk of landslides.A major aftershock occurred on 12 May 2015 at 12:51 NST with a moment magnitude (Mw) of 7.3. The epicenter was near the Chinese border between the capital of Kathmandu and Mt. Everest. More than 200 people were killed and more than 2,500 were injured by this aftershock.