Anisotropy in the Earth`s crust and uppermost mantle in
... broadband seismometers at the stations Vitosha (Bulgaria) and Muntele Rosu (Romania), were processed to obtain the dispersion properties of Rayleigh and Love surface waves. Rayleigh and Love group-velocity dispersion curves were obtained by frequency – time analysis (FTAN). The path-averaged shear-w ...
... broadband seismometers at the stations Vitosha (Bulgaria) and Muntele Rosu (Romania), were processed to obtain the dispersion properties of Rayleigh and Love surface waves. Rayleigh and Love group-velocity dispersion curves were obtained by frequency – time analysis (FTAN). The path-averaged shear-w ...
Igneous and Metamorphic Reservoirs
... which include igneous (extrusive and intrusive) and metamorphic rocks. Granite reservoirs are prolific in Viet Nam, Libya, and Indonesia. Lesser-known granite reservoirs exist in Venezuela, United States, Russia, and elsewhere. Indonesia is blessed with a combination sedimentary, metamorphic, and gr ...
... which include igneous (extrusive and intrusive) and metamorphic rocks. Granite reservoirs are prolific in Viet Nam, Libya, and Indonesia. Lesser-known granite reservoirs exist in Venezuela, United States, Russia, and elsewhere. Indonesia is blessed with a combination sedimentary, metamorphic, and gr ...
Composition Physical Properties
... The speed and refraction of seismic waves is generally used to interpret the inner structure and composition of the Earth There are also a few samples of rocks from the mantle in volcanics, kimberlite pipes, and in oceanic crust Aside from seismic studies, we also can explore the subsurface using st ...
... The speed and refraction of seismic waves is generally used to interpret the inner structure and composition of the Earth There are also a few samples of rocks from the mantle in volcanics, kimberlite pipes, and in oceanic crust Aside from seismic studies, we also can explore the subsurface using st ...
The Big MELT
... the crust and from the composition of basalts recovered at the seafloor by dredging, drilling, and submersible sampling. Much uncertainty remains about where and how the melt forms and is extracted from the mantle, because we have not had any means to directly probe into the melt production region t ...
... the crust and from the composition of basalts recovered at the seafloor by dredging, drilling, and submersible sampling. Much uncertainty remains about where and how the melt forms and is extracted from the mantle, because we have not had any means to directly probe into the melt production region t ...
CEA - Earthquakes
... the Earth and has highlighted their movements. There are seven major plates which are colliding, diverging or sliding past each other. Each year the continents move several centimeters with respect to one another. This process, known as "continental drift", was finally explained by plate tectonics. ...
... the Earth and has highlighted their movements. There are seven major plates which are colliding, diverging or sliding past each other. Each year the continents move several centimeters with respect to one another. This process, known as "continental drift", was finally explained by plate tectonics. ...
Seismic Rehabilitation of a Historic Concrete
... Analytical results of the existing building building Dynamic analysis. A modal analysis of the building was conducted to determine the fundamental period and mode shapes of the structure. Table 1 summarizes the results for the first three modes obtained. The first two mode shapes of the building ar ...
... Analytical results of the existing building building Dynamic analysis. A modal analysis of the building was conducted to determine the fundamental period and mode shapes of the structure. Table 1 summarizes the results for the first three modes obtained. The first two mode shapes of the building ar ...
Using earthquakes to uncover the Earth`s inner secrets
... world where he can choose the area and the number of earthquakes and volcanic eruptions which are to be displayed each second. Plates boundaries can be shown to point out the relationships between earthquake locations and the plate boundaries. The visitors are generally impressed by the huge amount ...
... world where he can choose the area and the number of earthquakes and volcanic eruptions which are to be displayed each second. Plates boundaries can be shown to point out the relationships between earthquake locations and the plate boundaries. The visitors are generally impressed by the huge amount ...
This article appeared in a journal published by Elsevier. The
... Unfortunately, the situation experienced in Tenerife is not exclusive to this region, but has occurred previously in other volcanic areas (e.g., the Guadeloupe crisis in 1976, Tazieff, 1979) and it will most certainly occur again somewhere else in the future. In an attempt to address the hazards and ...
... Unfortunately, the situation experienced in Tenerife is not exclusive to this region, but has occurred previously in other volcanic areas (e.g., the Guadeloupe crisis in 1976, Tazieff, 1979) and it will most certainly occur again somewhere else in the future. In an attempt to address the hazards and ...
Crustal structure and tectonic setting of the south
... Basement by Gravity Inversion To estimate the depth to the crystalline basement, we calculated an inversion of the Bouguer residual anomaly (Figure 2c). Gravity modeling requires knowledge of densities of subsurface bodies, which can be approximated by using standard relationships between densities ...
... Basement by Gravity Inversion To estimate the depth to the crystalline basement, we calculated an inversion of the Bouguer residual anomaly (Figure 2c). Gravity modeling requires knowledge of densities of subsurface bodies, which can be approximated by using standard relationships between densities ...
PDF - World Housing Encyclopedia
... center of Athens. The earthquake was magnitude .s =5.9 and the coordinates of the epicentre were located at 38.12.-23.64., in the area of Parnitha mountain. This earthquake came as a surprise, since no seismic activity was recorded in this region for the last 200 years. According to strong-motion re ...
... center of Athens. The earthquake was magnitude .s =5.9 and the coordinates of the epicentre were located at 38.12.-23.64., in the area of Parnitha mountain. This earthquake came as a surprise, since no seismic activity was recorded in this region for the last 200 years. According to strong-motion re ...
Józef Kabiesz, Beata Sikora, Marek Sikora and Łukasz Wróbel
... The aim of this paper is to make an attempt at improving accuracy of seismic hazard prediction. Two hazard assessment methods, commonly applied in Polish hard coal mines, act as our reference point. These methods are so-called seismic method and seismoacoustic method which are described later in thi ...
... The aim of this paper is to make an attempt at improving accuracy of seismic hazard prediction. Two hazard assessment methods, commonly applied in Polish hard coal mines, act as our reference point. These methods are so-called seismic method and seismoacoustic method which are described later in thi ...