comparison of earthquake locations determined with
... a large scatter in offshore travel times along the north coast. Parameters for two possible mean travel-time curves are given in Table 2, together with the crustal structures calculated from these curves. These two structures illustrate some of the latitude in fitting a model to the data. Structure ...
... a large scatter in offshore travel times along the north coast. Parameters for two possible mean travel-time curves are given in Table 2, together with the crustal structures calculated from these curves. These two structures illustrate some of the latitude in fitting a model to the data. Structure ...
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 ...
Test of Strain Behavior Model with Radon Anomaly in Seismogenic
... The regional scale nature of precursory deformations can help us understanding the local dynamics of the subsoil radon field controlled by variations in the stress-strain state in tectonically un compacted regions of the crust was proposed in [15,16]. In this paper, we derive a probabilistic bayesia ...
... The regional scale nature of precursory deformations can help us understanding the local dynamics of the subsoil radon field controlled by variations in the stress-strain state in tectonically un compacted regions of the crust was proposed in [15,16]. In this paper, we derive a probabilistic bayesia ...
OUTER RISE SEISMICITY OF THE SUBDUCTING NAZCA PLATE
... Forsyth, 1979; Christensen and Ruff, 1988]. Compressional events occur in much fewer numbers and at deeper depths than tensional earthquakes in the outer rise. Lefeldt et al. [2009] suggest that outer rise events larger than Mw=5 might create faults that may allow sea water to penetrate the plate do ...
... Forsyth, 1979; Christensen and Ruff, 1988]. Compressional events occur in much fewer numbers and at deeper depths than tensional earthquakes in the outer rise. Lefeldt et al. [2009] suggest that outer rise events larger than Mw=5 might create faults that may allow sea water to penetrate the plate do ...
Comparison of Structural Design Actions Part 4: Earthquake Actions
... AS1170.4:2007 code and has examined the implications to building frame structural systems. The principles of seismic design and the advances in the field that lead to development of the new AS1170.4:2007 code [7] have been presented. A detailed comparison of the differences between the Layout, Notat ...
... AS1170.4:2007 code and has examined the implications to building frame structural systems. The principles of seismic design and the advances in the field that lead to development of the new AS1170.4:2007 code [7] have been presented. A detailed comparison of the differences between the Layout, Notat ...
Mantle hydration and Cl-rich fluids in the subduction forearc
... dehydration of hydrothermally altered oceanic lithosphere. Interpretation of seismic data from petrophysical constrain is limited by complex effects due to anisotropy that needs to be assessed both in the analysis and interpretation of seismic data. Electrical conductivity increases with increasing ...
... dehydration of hydrothermally altered oceanic lithosphere. Interpretation of seismic data from petrophysical constrain is limited by complex effects due to anisotropy that needs to be assessed both in the analysis and interpretation of seismic data. Electrical conductivity increases with increasing ...
Long-Term Records of Tsunamis
... Bondevik et al. (2005) compare the extensive set of run-up data from Norway, Scotland and the Shetland Islands, with numerical simulations of the Storegga slide. Their best-fit model suggests that sea levels along the Norwegian coast fell by around 20 m during the first 30 minutes following the slid ...
... Bondevik et al. (2005) compare the extensive set of run-up data from Norway, Scotland and the Shetland Islands, with numerical simulations of the Storegga slide. Their best-fit model suggests that sea levels along the Norwegian coast fell by around 20 m during the first 30 minutes following the slid ...
Study on the Safety Factors of the Bedding Rock Slope under
... magnitudes and generally close to each other, with a gap of only 7%. The difference can be attributed to the different dynamic loading inputs. In the finite difference method, the loading is represented by the applied stress time-history curve on the slope bottom, whereas in the limit equilibrium me ...
... magnitudes and generally close to each other, with a gap of only 7%. The difference can be attributed to the different dynamic loading inputs. In the finite difference method, the loading is represented by the applied stress time-history curve on the slope bottom, whereas in the limit equilibrium me ...
Crustal structure beneath the Strait of Juan de Fuca and southern
... velocity of 2.2 km s 1 since the average sediment velocities determined from travel times of the near-offset arrivals ranged from 2.0 to 3.5 km s 1); (2) travel time inversion of upper middle crustal turning waves (phase Pg); (3) travel time inversion of deeper reflected arrivals; and (4) adjustment ...
... velocity of 2.2 km s 1 since the average sediment velocities determined from travel times of the near-offset arrivals ranged from 2.0 to 3.5 km s 1); (2) travel time inversion of upper middle crustal turning waves (phase Pg); (3) travel time inversion of deeper reflected arrivals; and (4) adjustment ...
Sibson, R., 1977, Fault rocks and fault mechanisms, Jour. geol. Soc
... raised or lowered with respect to gravitational equipotentials. The amount involved will be minimal for strike-slip faulting. Proportionately the most energy may be expended against gravity during reverse faulting which on a large scale leads to crustal thickening, while energy is usually gained fro ...
... raised or lowered with respect to gravitational equipotentials. The amount involved will be minimal for strike-slip faulting. Proportionately the most energy may be expended against gravity during reverse faulting which on a large scale leads to crustal thickening, while energy is usually gained fro ...
Seismicity and earthquake hazard analysis of the Teton
... Jackson Lake seismic network that operated from 1986–2002. An earthquake catalog was then developed for 1986–2002 for the Teton region using relocated hypocenters. The resulting data revealed a seismically quiescent Teton fault, at ML, local magnitude > 3, with diffuse seismicity in the southern Jac ...
... Jackson Lake seismic network that operated from 1986–2002. An earthquake catalog was then developed for 1986–2002 for the Teton region using relocated hypocenters. The resulting data revealed a seismically quiescent Teton fault, at ML, local magnitude > 3, with diffuse seismicity in the southern Jac ...
Seismic velocity structure and anisotropy of the Alaska subduction
... Waveforms of each event were examined to eliminate bad station records such as those with missing data segments. The waveforms were then filtered in SAC [Goldstein et al., 2003] using narrow band, zero phase shift fourth-order Butterworth filters centered at periods of 22, 25, 29, 33, 40 46, 50, 59, 6 ...
... Waveforms of each event were examined to eliminate bad station records such as those with missing data segments. The waveforms were then filtered in SAC [Goldstein et al., 2003] using narrow band, zero phase shift fourth-order Butterworth filters centered at periods of 22, 25, 29, 33, 40 46, 50, 59, 6 ...
The Tectonic Framework of the Sumatran Subduction Zone
... deep trench, and the subducting oceanic plate. Hamilton (1979) suggests that Sumatra was rifted from the northern edge of Australia (north of New Guinea) during the Triassic to early Jurassic (∼200–250 Ma). Sumatra would have been a stable continental margin from then until subduction began in the C ...
... deep trench, and the subducting oceanic plate. Hamilton (1979) suggests that Sumatra was rifted from the northern edge of Australia (north of New Guinea) during the Triassic to early Jurassic (∼200–250 Ma). Sumatra would have been a stable continental margin from then until subduction began in the C ...
The GOCE estimated Moho beneath the Tibetan Plateau
... missions (e.g. GRACE) has recently been proposed by Shin et al. (2007) and improved by Shin et al. (2009). However, due to the smoothing effect of the altitude on the gravitational field, the inversion has never been performed directly from satellite observations but it has been done from global gra ...
... missions (e.g. GRACE) has recently been proposed by Shin et al. (2007) and improved by Shin et al. (2009). However, due to the smoothing effect of the altitude on the gravitational field, the inversion has never been performed directly from satellite observations but it has been done from global gra ...
- White Rose Research Online
... in that area in more than 150 years. Shaking was widely felt throughout New Zealand with widespread damage occurring across the northern South Island. Global moment tensor solutions showed a combination reverse and strike slip faulting with a strong non-double couple component. Aftershocks follow a ...
... in that area in more than 150 years. Shaking was widely felt throughout New Zealand with widespread damage occurring across the northern South Island. Global moment tensor solutions showed a combination reverse and strike slip faulting with a strong non-double couple component. Aftershocks follow a ...
Seismic structure of Cocos and Malpelo Volcanic Ridges and
... improve the signal-to-noise ratio. [10] The Pg phase is clearly observed in all the record sections. The pattern of this phase is similar in most of the instruments from the three lines, though some strong lateral variations related with prominent bathymetric features are also observed. At near offs ...
... improve the signal-to-noise ratio. [10] The Pg phase is clearly observed in all the record sections. The pattern of this phase is similar in most of the instruments from the three lines, though some strong lateral variations related with prominent bathymetric features are also observed. At near offs ...
Improving the system for managing earthquake
... and displacement) 8. Because the definition relates to the site of the building, it takes into account the different levels of seismicity around New Zealand. A Determination, issued by the former Department of Building and Housing in 2012, concluded that where the provisions in the Act relating to ...
... and displacement) 8. Because the definition relates to the site of the building, it takes into account the different levels of seismicity around New Zealand. A Determination, issued by the former Department of Building and Housing in 2012, concluded that where the provisions in the Act relating to ...
Earthquake engineering
Earthquake engineering or Seismic engineering is a branch of engineering that searches for ways to make structures, such as buildings and bridges, resistant to earthquake damage. Earthquake engineer, better known as a seismic engineer aim to develop building techniques that will prevent any damage in a minor quake and avoid serious damage or collapse in a major shake. It is the scientific field concerned with protecting society, the natural environment, and the man-made environment from earthquakes by limiting the seismic risk to socio-economically acceptable levels. Traditionally, it has been narrowly defined as the study of the behavior of structures and geo-structures subject to seismic loading; it is considered as a subset of both structural and geotechnical engineering. However, the tremendous costs experienced in recent earthquakes have led to an expansion of its scope to encompass disciplines from the wider field of civil engineering, mechanical engineering and from the social sciences, especially sociology, political science, economics and finance. The main objectives of earthquake engineering are: Foresee the potential consequences of strong earthquakes on urban areas and civil infrastructure. Design, construct and maintain structures to perform at earthquake exposure up to the expectations and in compliance with building codes.A properly engineered structure does not necessarily have to be extremely strong or expensive. It has to be properly designed to withstand the seismic effects while sustaining an acceptable level of damage.