Global Prevalence of Double Benioff Zones
... showing slab-normal distribution of EHB events for all segments analyzed, sorted by subducting plate age. DBZ separation is estimated by multiple Gaussian fits shown in green, and dashed linear best fit highlights a significant increase with age. Epicenters (PDE). The catalogs are constructed only f ...
... showing slab-normal distribution of EHB events for all segments analyzed, sorted by subducting plate age. DBZ separation is estimated by multiple Gaussian fits shown in green, and dashed linear best fit highlights a significant increase with age. Epicenters (PDE). The catalogs are constructed only f ...
Heimgartner_thesis_revise - The Nevada Seismological
... Mine blasts from Barrick GoldStrike served as the primary shots for the 2004 seismic refraction experiment (INC). Although blasts were recorded on each day of the experiment, this paper only discusses and utilizes the Thursday and Friday blasts for the model inversion. On August 19, 2004, Julian day ...
... Mine blasts from Barrick GoldStrike served as the primary shots for the 2004 seismic refraction experiment (INC). Although blasts were recorded on each day of the experiment, this paper only discusses and utilizes the Thursday and Friday blasts for the model inversion. On August 19, 2004, Julian day ...
IDENTIFICATION OF SLIDE-GENERATED TSUNAMIS IN THE
... documented. Some of these waves were destructive and resulted in a considerable economic damage and numerous losses of lives. One of the largest pre-historical submarine landslides with the estimated volume of mass flow of 1,700 km3 occurred ca. 7000BC in the Northern Sea at the edge of the continen ...
... documented. Some of these waves were destructive and resulted in a considerable economic damage and numerous losses of lives. One of the largest pre-historical submarine landslides with the estimated volume of mass flow of 1,700 km3 occurred ca. 7000BC in the Northern Sea at the edge of the continen ...
Chapter 5: EARTHQUAKE RISK
... earthquake risk assessment undertaken for any Australian city to date. It has focused on the economic 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 surfac ...
... earthquake risk assessment undertaken for any Australian city to date. It has focused on the economic 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 surfac ...
Chapter 1: Seismic Wave Attenuation
... earthquake. There are two main types of seismic waves, the surface waves and the body waves. Body waves are waves that penetrate deeply thorough the interior of the Earth. These waves represent short pulses of propagating energy. They follow refracted raypaths determined by the elastic moduli and de ...
... earthquake. There are two main types of seismic waves, the surface waves and the body waves. Body waves are waves that penetrate deeply thorough the interior of the Earth. These waves represent short pulses of propagating energy. They follow refracted raypaths determined by the elastic moduli and de ...
Structure of the Earth`s Crust in Fennoscandia as Revealed from
... to 1.77. In the upper crust, in the Archean granodioritic basement gneiss, the ratio is only 1.67. A detailed study of fracturing and velocity distribution of the crystalline uppermost crust along the profile revealed that in the uppermost 1 km the Vp/Vs values are high, varying from 1.76 to 2.0 (Gr ...
... to 1.77. In the upper crust, in the Archean granodioritic basement gneiss, the ratio is only 1.67. A detailed study of fracturing and velocity distribution of the crystalline uppermost crust along the profile revealed that in the uppermost 1 km the Vp/Vs values are high, varying from 1.76 to 2.0 (Gr ...
Geochemistry, Geophysics, Geosystems - ePrints Soton
... Abstract On 24 October 2002, Mw 6.2 earthquake occurred in the central part of the Lake Kivu basin, Western Branch of the East African Rift. This is the largest event recorded in the Lake Kivu area since 1900. An integrated analysis of radar interferometry (InSAR), seismic and geological data, demon ...
... Abstract On 24 October 2002, Mw 6.2 earthquake occurred in the central part of the Lake Kivu basin, Western Branch of the East African Rift. This is the largest event recorded in the Lake Kivu area since 1900. An integrated analysis of radar interferometry (InSAR), seismic and geological data, demon ...
Master`s Thesis Template
... zones give rise to high disorder (black color). These are the zones with poor data quality. Magenta color picked horizon shows top Jurassic level horizon shown in Figure 3.6. Note that low disorder (white color) shows high quality areas. These are the zones where our picks will be easier to make and ...
... zones give rise to high disorder (black color). These are the zones with poor data quality. Magenta color picked horizon shows top Jurassic level horizon shown in Figure 3.6. Note that low disorder (white color) shows high quality areas. These are the zones where our picks will be easier to make and ...
Reinforced Concrete Structures
... It is important to note that the information presented in Chaps. 6 through 10 is applicable to the design of members in structures that are located in areas of low-tomoderate seismic risk. Seismic risk is related to seismic design category (SDC), which is defined in IBC 1613.5.6. In general, SDC is d ...
... It is important to note that the information presented in Chaps. 6 through 10 is applicable to the design of members in structures that are located in areas of low-tomoderate seismic risk. Seismic risk is related to seismic design category (SDC), which is defined in IBC 1613.5.6. In general, SDC is d ...
Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan
... also been found to correlate with volcanic activity, for example, CO2 emissions (Hill, 1996), shallow high-frequency (HF) earthquakes (Nakamichi et al., 2003) and eruptions (White, 1996). Therefore, LF earthquakes are useful for evaluating volcanic subsurface activity and must be investigated. Mt. F ...
... also been found to correlate with volcanic activity, for example, CO2 emissions (Hill, 1996), shallow high-frequency (HF) earthquakes (Nakamichi et al., 2003) and eruptions (White, 1996). Therefore, LF earthquakes are useful for evaluating volcanic subsurface activity and must be investigated. Mt. F ...
High-resolution estimates of lithospheric thickness from Missouri to
... extent of this anomaly approximately coincide with those of the Illinois basin, which has a 5 km thick Proterozoic crustal layer of high seismic re£ectivity underlying 7 km of Paleozoic sediments [14]. McBride and Kolata [14] favor the explanation that these Proterozoic strata are a stack of basalti ...
... extent of this anomaly approximately coincide with those of the Illinois basin, which has a 5 km thick Proterozoic crustal layer of high seismic re£ectivity underlying 7 km of Paleozoic sediments [14]. McBride and Kolata [14] favor the explanation that these Proterozoic strata are a stack of basalti ...
Structure and Serpentinization of the Subducting Cocos Plate
... by magnetic anomalies on the adjacent Cocos plate [Barckhausen et al., 2001] and on conjugate sections of oceanic crust elsewhere in the Pacific [Lonsdale, 2005; Barckhausen et al., 2008]. Oceanic crust of the Farallon plate formed at the EPR west of Central America until about 23 Ma ago, when an ea ...
... by magnetic anomalies on the adjacent Cocos plate [Barckhausen et al., 2001] and on conjugate sections of oceanic crust elsewhere in the Pacific [Lonsdale, 2005; Barckhausen et al., 2008]. Oceanic crust of the Farallon plate formed at the EPR west of Central America until about 23 Ma ago, when an ea ...
Larry J. Ruff - Seismological Research Letters
... wave. Which one is pP? When you look at just one seismogram, it can be very difficult to identify pP properly. The USGS NEIC and ISC earthquake location services do collect and report thepP picks, but they have learned to be careful in using these picks for their standard earthquake locations. Inclu ...
... wave. Which one is pP? When you look at just one seismogram, it can be very difficult to identify pP properly. The USGS NEIC and ISC earthquake location services do collect and report thepP picks, but they have learned to be careful in using these picks for their standard earthquake locations. Inclu ...
Receiver function analysis - DUO
... In this this study, receiver function analysis of the crust underneath TROLL seismic station in Queen Maud Land, Antarctica was performed. An analysis of the neighboring seismic station SNAA was carried out as well to provide ground of comparison. Receiver function analysis is a seismic method utili ...
... In this this study, receiver function analysis of the crust underneath TROLL seismic station in Queen Maud Land, Antarctica was performed. An analysis of the neighboring seismic station SNAA was carried out as well to provide ground of comparison. Receiver function analysis is a seismic method utili ...
Physical modeling of the formation and evolution of
... 2.2. Raw data Fig. 1 illustrates the loading history. Each experiment comprises three stages of loading: (1) the rise of differential stress up to a maximum; (2) a stage of nearly constant stress; and finally, (3) a drop in stress due to incipient failure. Below we shall call the two last stages the ...
... 2.2. Raw data Fig. 1 illustrates the loading history. Each experiment comprises three stages of loading: (1) the rise of differential stress up to a maximum; (2) a stage of nearly constant stress; and finally, (3) a drop in stress due to incipient failure. Below we shall call the two last stages the ...
2-D georesistivity structure in the central part of the northeastern...
... plain area. Several steps to improve data quality were taken besides the remote reference technique, such as smoothing of the impedance tensor in the frequency domain through the 1-D Bostic model as in previous report. The smoothed impedance data are sampled at chosen frequencies on the basis of the ...
... plain area. Several steps to improve data quality were taken besides the remote reference technique, such as smoothing of the impedance tensor in the frequency domain through the 1-D Bostic model as in previous report. The smoothed impedance data are sampled at chosen frequencies on the basis of the ...
High School - Tsunami Awareness Program
... increase because of the growing exposure which results from expanding populations, many of which are concentrated in big cities of more than 5 million inhabitants (Tokyo, Japan; Lima, Peru). Earthquakes are as inescapable as the weather. Even Mars and the Moon have them. Here on Earth, seismologists ...
... increase because of the growing exposure which results from expanding populations, many of which are concentrated in big cities of more than 5 million inhabitants (Tokyo, Japan; Lima, Peru). Earthquakes are as inescapable as the weather. Even Mars and the Moon have them. Here on Earth, seismologists ...
Author`s personal copy
... not simple discontinuities, but heterogeneous (thin layering) zones. Beneath the N boundary the block structure typical of the upper brittle part of the lithosphere disappears and low-velocity layers are often observed. At the L boundary the Q factor decreases and the upper mantle structure changes ...
... not simple discontinuities, but heterogeneous (thin layering) zones. Beneath the N boundary the block structure typical of the upper brittle part of the lithosphere disappears and low-velocity layers are often observed. At the L boundary the Q factor decreases and the upper mantle structure changes ...
Dehydration of serpentinized slab mantle: Seismic evidence from southwest Japan
... is much slower than that from the oceanic crust events in Tokai, i.e., 8.1 km/sec (Hori et al., 1985). Using the incident angles of 60–70◦ beneath Kanto (figure 14 of Hori, 1990), we obtain an in-situ slab mantle P-wave velocity of 6.7–7.2 km/sec, which coincides with the velocity of the Izu-Bonin f ...
... is much slower than that from the oceanic crust events in Tokai, i.e., 8.1 km/sec (Hori et al., 1985). Using the incident angles of 60–70◦ beneath Kanto (figure 14 of Hori, 1990), we obtain an in-situ slab mantle P-wave velocity of 6.7–7.2 km/sec, which coincides with the velocity of the Izu-Bonin f ...
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.