Slow strain waves in blocky geological media from GPS and
... Baikal Branch of the Geophysical Survey of the Russian Academy of Sciences (GS RAS) (http://www.seis-bykl.ru/) and the IRIS catalog (http://www.iris.edu). As a result of the calculation, the average period of seismicity maximum passage in days from the beginning of the year has been determined for e ...
... Baikal Branch of the Geophysical Survey of the Russian Academy of Sciences (GS RAS) (http://www.seis-bykl.ru/) and the IRIS catalog (http://www.iris.edu). As a result of the calculation, the average period of seismicity maximum passage in days from the beginning of the year has been determined for e ...
Isostasy and structure of the lower crust and upper mantle in the
... be complete at 52 km, the base of the thickest crust. However, it may only be complete at greater depths. Very little information is available about the upper mantle structure in the region. Drummond & others (1981) suggested that lateral chemical variations within the upper mantle could account for ...
... be complete at 52 km, the base of the thickest crust. However, it may only be complete at greater depths. Very little information is available about the upper mantle structure in the region. Drummond & others (1981) suggested that lateral chemical variations within the upper mantle could account for ...
improvement of regional seismic hazard assessment considering
... located in seismically active regions. Traditionally, in a seismically active region as Greece, the seismic hazard evaluation was based primarily on the historical seismicity, and to lesser extent based on the consideration of the geological information. The importance of the geological information ...
... located in seismically active regions. Traditionally, in a seismically active region as Greece, the seismic hazard evaluation was based primarily on the historical seismicity, and to lesser extent based on the consideration of the geological information. The importance of the geological information ...
Entire paper as a 2 MB file
... in the discrete curvilinear plate boundaries of a platetectonic model of the Earth's lithosphere. In principle, there should be a proportionality between some measure(s) of long-term-average seismicity and the relative velocity of the adjacent plates. However, it is necessary to consider that differ ...
... in the discrete curvilinear plate boundaries of a platetectonic model of the Earth's lithosphere. In principle, there should be a proportionality between some measure(s) of long-term-average seismicity and the relative velocity of the adjacent plates. However, it is necessary to consider that differ ...
Magnetic storm free ULF analysis in relation with earthquakes in
... The values (∼0.6; also see Fig. A6 in Appendix), which suggest seismo-magnetic anomalies, could be observed in Taiwan regions during the Tohoku earthquake, but they are almost even at all the studied stations (i.e. including the KM station located about 300 km away; also see Fig. 4). Thus, no obviou ...
... The values (∼0.6; also see Fig. A6 in Appendix), which suggest seismo-magnetic anomalies, could be observed in Taiwan regions during the Tohoku earthquake, but they are almost even at all the studied stations (i.e. including the KM station located about 300 km away; also see Fig. 4). Thus, no obviou ...
Diaster Preparedness
... major disasters facing the west region we look at earthquakes which are defined as, “shaking or trembling of the earth that is volcanic or tectonic in origin” ("Merriam-Webster," 2013). Earthquakes are one of the biggest threats because they strike with no warning, All 50 states and all U.S. territo ...
... major disasters facing the west region we look at earthquakes which are defined as, “shaking or trembling of the earth that is volcanic or tectonic in origin” ("Merriam-Webster," 2013). Earthquakes are one of the biggest threats because they strike with no warning, All 50 states and all U.S. territo ...
Volcanic activity before and after large tectonic
... Examples of clustered eruptions and earthquakes discussed in the literature include events that took place simultaneously as well as events separated by a considerable delay, thus of seconds, days, months or even years. While historical information on the timing of large earthquakes is often very pr ...
... Examples of clustered eruptions and earthquakes discussed in the literature include events that took place simultaneously as well as events separated by a considerable delay, thus of seconds, days, months or even years. While historical information on the timing of large earthquakes is often very pr ...
Plate Tectonics and Earthquake Potential of Spreading Ridges and
... velocity-dependent. An additional complication is that seismicity in any local region is probably time-dependent, so the available seismic catalogs are not adequate to estimate long-term-average seismicity of most local regions. Our approach in this project is to mitigate the complication of time-de ...
... velocity-dependent. An additional complication is that seismicity in any local region is probably time-dependent, so the available seismic catalogs are not adequate to estimate long-term-average seismicity of most local regions. Our approach in this project is to mitigate the complication of time-de ...
Relocation of aftershocks, focal mechanisms and stress inversion:
... intraplate regions in the world: New Madrid, USA and Kachchh, India (Bendick et al., 2001; Bodin et al., 2001; Schweig et al., 2003). Large earthquakes are known to have been occurring in the Kachchh region since historical times (Rajendran and Rajendran, 2001). It has been inferred, based on the ra ...
... intraplate regions in the world: New Madrid, USA and Kachchh, India (Bendick et al., 2001; Bodin et al., 2001; Schweig et al., 2003). Large earthquakes are known to have been occurring in the Kachchh region since historical times (Rajendran and Rajendran, 2001). It has been inferred, based on the ra ...
V structural models associated with
... 3-D VP and VS models for the crust and upper mantle beneath the Taiwan area have been determined using selected high-resolution earthquake data from an island-wide seismic network and two local seismic arrays. Lateral structural variations in the upper crust, as also evident from surface geology, ar ...
... 3-D VP and VS models for the crust and upper mantle beneath the Taiwan area have been determined using selected high-resolution earthquake data from an island-wide seismic network and two local seismic arrays. Lateral structural variations in the upper crust, as also evident from surface geology, ar ...
P from the 2011 Tohoku-Oki earthquake Masatoshi Miyazawa
... 2008a, b) because P-wave arrivals cause high-frequency transient stress changes and it is difficult to identify a local event using a high-pass filtering technique, particularly if the embedded event is minor. In the case of the 2011 Tohoku-Oki earthquake, the stress changes due to P-waves were more ...
... 2008a, b) because P-wave arrivals cause high-frequency transient stress changes and it is difficult to identify a local event using a high-pass filtering technique, particularly if the embedded event is minor. In the case of the 2011 Tohoku-Oki earthquake, the stress changes due to P-waves were more ...
An introduction to the special issue of Earth and Planetary Science
... provide fertile ground for comparison with seismic velocity models obtained at similar scales, as well as geologic and tectonic features at the surface. While the main scientific focus of EarthScope is the structure of the North American continent, the design of USArray lends itself to other types of ...
... provide fertile ground for comparison with seismic velocity models obtained at similar scales, as well as geologic and tectonic features at the surface. While the main scientific focus of EarthScope is the structure of the North American continent, the design of USArray lends itself to other types of ...
The seismic behaviour of buildings erected in
... About two weeks before this serious incident an earthquake measuring 6.3 on the Richter scale caused extensive damage of ca. 13 billion dollars in Christchurch, New Zealand. Throughout the course of this natural disaster more than 5000 houses were destroyed and approximately 200 people were killed [ ...
... About two weeks before this serious incident an earthquake measuring 6.3 on the Richter scale caused extensive damage of ca. 13 billion dollars in Christchurch, New Zealand. Throughout the course of this natural disaster more than 5000 houses were destroyed and approximately 200 people were killed [ ...
Document
... 5. What information is available from potential field data about non-reflective granites and their volumes? 6. What inferences can be made about the nature of the cryptic lower crust of the eastern Lachlan Orogen? Answers to these questions can independently test and strengthen the conclusions made ...
... 5. What information is available from potential field data about non-reflective granites and their volumes? 6. What inferences can be made about the nature of the cryptic lower crust of the eastern Lachlan Orogen? Answers to these questions can independently test and strengthen the conclusions made ...
Velocity Measurements of Pore Fluids at Pressure
... temperature at both high and low frequencies, respectively. In contrast, the S-wave velocity changes vary slightly. They both emphasize that drop in P-velocity is mostly due to the change in fluid bulk modulus with temperature. Recent ultrasonic measurements with bitumen saturated carbonate from the ...
... temperature at both high and low frequencies, respectively. In contrast, the S-wave velocity changes vary slightly. They both emphasize that drop in P-velocity is mostly due to the change in fluid bulk modulus with temperature. Recent ultrasonic measurements with bitumen saturated carbonate from the ...
MK2321002108
... Report No.94-01, Earthquake Engineering Research Institute, Oakland, USA. IS:13935-1993, Repair and Strengthening of Buildings - Indian Standard Guidelines, Bureau of Indian ...
... Report No.94-01, Earthquake Engineering Research Institute, Oakland, USA. IS:13935-1993, Repair and Strengthening of Buildings - Indian Standard Guidelines, Bureau of Indian ...
Introduction to Seismology: The wave equation and body waves
... by the community for the entire community to use. Even data from PI-funded experiments to study particular regions typically are released 18 months after the experiment ends. Indeed, the National Science Foundation (NSF) requires that all data collected in NSF-funded experiments be made available th ...
... by the community for the entire community to use. Even data from PI-funded experiments to study particular regions typically are released 18 months after the experiment ends. Indeed, the National Science Foundation (NSF) requires that all data collected in NSF-funded experiments be made available th ...
Author`s personal copy
... same stress values. At shallow depth, Leucci and De Giorgi (2006) investigated the effects of fracture on P and S wave velocity values in sedimentary rocks. They experimentally showed that, if the two seismic velocities significantly decrease with the fracturing intensity, Vs is more sensitive to fra ...
... same stress values. At shallow depth, Leucci and De Giorgi (2006) investigated the effects of fracture on P and S wave velocity values in sedimentary rocks. They experimentally showed that, if the two seismic velocities significantly decrease with the fracturing intensity, Vs is more sensitive to fra ...
Three-dimensional seismic velocity structure of the northwestern
... [14] Newberry volcano often is highlighted as the western terminus of the northwestward propagating High Lava Plains volcanic lineament and is characterized by bimodal basalt and rhyolitic volcanism more typical of the HLP than the Cascades. Yet Newberry basalts carry a geochemical signature of a ma ...
... [14] Newberry volcano often is highlighted as the western terminus of the northwestward propagating High Lava Plains volcanic lineament and is characterized by bimodal basalt and rhyolitic volcanism more typical of the HLP than the Cascades. Yet Newberry basalts carry a geochemical signature of a ma ...
Balance of seismic moment in the Songpan
... Slip rates are the basis for assessing seismic potential on host faults, and can be determined from active tectonic studies and geodetic measurements. Slip rates derived from active tectonic or neotectonic studies provide long-term average values; many of such studies have been taken in eastern Tibe ...
... Slip rates are the basis for assessing seismic potential on host faults, and can be determined from active tectonic studies and geodetic measurements. Slip rates derived from active tectonic or neotectonic studies provide long-term average values; many of such studies have been taken in eastern Tibe ...
tunnel–ground interaction analysis: discrete beam–spring vs
... Elefterija Zlatanović, Vlatko Šešov, Dragan Č. Lukić, Aleksandar Prokić, Marina Trajković-Milenković Original scientific paper For the purpose of studying the soil–tunnel structure interaction, a number of two-dimensional linear numerical analyses has been performed with the aid of the software pack ...
... Elefterija Zlatanović, Vlatko Šešov, Dragan Č. Lukić, Aleksandar Prokić, Marina Trajković-Milenković Original scientific paper For the purpose of studying the soil–tunnel structure interaction, a number of two-dimensional linear numerical analyses has been performed with the aid of the software pack ...
Seismology - Università degli studi di Trieste
... a unique solution. Instead, a range of solutions is offered, each with its own probability of being correct. The solution is better the more data we have. Seismology I - Introduction ...
... a unique solution. Instead, a range of solutions is offered, each with its own probability of being correct. The solution is better the more data we have. Seismology I - Introduction ...
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.