Temporal changes in seismic velocity of the crust around Iwate... as inferred from analyses of repeated active seismic experiment data
... seismograms are adjusted by eye-picked arrival times of initial phase. Time series of coherence and phase difference at 4.7 Hz for the shot 1 data to the other shots are plotted in Fig. 4(b). For both of the stations, the coherences for each pair of the shots show large values of more than 0.75 for ...
... seismograms are adjusted by eye-picked arrival times of initial phase. Time series of coherence and phase difference at 4.7 Hz for the shot 1 data to the other shots are plotted in Fig. 4(b). For both of the stations, the coherences for each pair of the shots show large values of more than 0.75 for ...
PDF (Chapter 3. The Crust and Upper Mantle)
... Uppermost mantle velocities are typically 8.0 to 8.2 kmls, and the spread is about 7.9-8.6 kmls. Some long refraction profiles give evidence for a deeper layer in the lithosphere having a velocity of 8.6 km/s. The seismic lithosphere, or LID, appears to contain at least two layers. Long refraction p ...
... Uppermost mantle velocities are typically 8.0 to 8.2 kmls, and the spread is about 7.9-8.6 kmls. Some long refraction profiles give evidence for a deeper layer in the lithosphere having a velocity of 8.6 km/s. The seismic lithosphere, or LID, appears to contain at least two layers. Long refraction p ...
Tomography of the 2011 Iwaki earthquake (M 7.0) and Fukushima
... earthquake (M 7.0) and the Fukushima nuclear power plant are determined by inverting a large number of high-quality arrival times with both the finite-frequency and ray tomography methods. The Iwaki earthquake and its aftershocks mainly occurred in a boundary zone with strong variations in seismic v ...
... earthquake (M 7.0) and the Fukushima nuclear power plant are determined by inverting a large number of high-quality arrival times with both the finite-frequency and ray tomography methods. The Iwaki earthquake and its aftershocks mainly occurred in a boundary zone with strong variations in seismic v ...
Section Review: Physics Name Test #3: Wave Theory Per/Sec
... 30 meters per second due east from a height of 20 meters above level ground. At the same instant, a 20-kilogram sphere, B, is projected horizontally with a velocity of 10 meters per second due west from a height of 80 meters above ...
... 30 meters per second due east from a height of 20 meters above level ground. At the same instant, a 20-kilogram sphere, B, is projected horizontally with a velocity of 10 meters per second due west from a height of 80 meters above ...
Clutch tectonics and the partial attachment of lithospheric layers
... The idea of a clutch zone may be most applicable to the context of wrenching. Wrench is defined as simple shear deformation accommodating a distributed strike-slip motion. Wrench systems do not result in thickening or thinning so that the vertical distribution of lithospheric layers and the rheologi ...
... The idea of a clutch zone may be most applicable to the context of wrenching. Wrench is defined as simple shear deformation accommodating a distributed strike-slip motion. Wrench systems do not result in thickening or thinning so that the vertical distribution of lithospheric layers and the rheologi ...
1 Stress in 3D
... static equilibrium (the so-called hydrostatic equilibrium in the case of a liquid) can support only a pressure state. (In a gas pressure may be tensile or compressive whereas in a liquid it must be compressive.) A solid body in static equilibrium can support a more general state of stress, which inc ...
... static equilibrium (the so-called hydrostatic equilibrium in the case of a liquid) can support only a pressure state. (In a gas pressure may be tensile or compressive whereas in a liquid it must be compressive.) A solid body in static equilibrium can support a more general state of stress, which inc ...
application of micro-seismic methods to geothermal exploration
... attractive reservoir which can be economically exploited for electric power generation and other uses. Such indicators as a heat source, availability and characteristics of fluids, reservoir temperature and flow channels are the main parameters investigated. Most of these parameters are sometimes ma ...
... attractive reservoir which can be economically exploited for electric power generation and other uses. Such indicators as a heat source, availability and characteristics of fluids, reservoir temperature and flow channels are the main parameters investigated. Most of these parameters are sometimes ma ...
the Ubiquitous Science Teacher Guide
... It is possible to have a negative velocity. This means that the object is going backward. It is not possible to have a negative speed because there is no specific direction. Vectors are units with a direction associated with them. Free fall is objects falling unaffected by air resistance. On Earth, ...
... It is possible to have a negative velocity. This means that the object is going backward. It is not possible to have a negative speed because there is no specific direction. Vectors are units with a direction associated with them. Free fall is objects falling unaffected by air resistance. On Earth, ...
Zha, Y., S. C. Webb, S. S. Wei, D. A. Wiens, D. K. Blackman, W
... We obtain phase velocity dispersion curves along 1225 interstation paths between the 50 OBS stations. For each frequency, only station pairs with distances longer than twice the wavelength are included, and dispersion curves with physically unacceptable velocity values and step-like jumps are discar ...
... We obtain phase velocity dispersion curves along 1225 interstation paths between the 50 OBS stations. For each frequency, only station pairs with distances longer than twice the wavelength are included, and dispersion curves with physically unacceptable velocity values and step-like jumps are discar ...
Configuration of subducting Philippine Sea plate and crustal
... A seismic experiment with six explosive sources and 391 seismic stations was conducted in August 2001 in the central Japan region. The crustal velocity structure for the central part of Japan and configuration of the subducting Philippine Sea plate were revealed. A large lateral variation of the thi ...
... A seismic experiment with six explosive sources and 391 seismic stations was conducted in August 2001 in the central Japan region. The crustal velocity structure for the central part of Japan and configuration of the subducting Philippine Sea plate were revealed. A large lateral variation of the thi ...
Anisotropic Pn tomography of Turkey and adjacent regions
... The recent improvements on the number and quality of seismic stations in Turkey and surrounding regions have provided high quality seismic data and improved coverage for most of Anatolian and Aegean domain. The approach in this work is similar to Hearn (1996, 1999) and Al-Lazki et al. (2004) but ben ...
... The recent improvements on the number and quality of seismic stations in Turkey and surrounding regions have provided high quality seismic data and improved coverage for most of Anatolian and Aegean domain. The approach in this work is similar to Hearn (1996, 1999) and Al-Lazki et al. (2004) but ben ...
The influence of negatively charged, heavier
... Programme schedule, including activity diagram/ Bar chart:During the first six months of the first year we propose to derive the dispersion relation and investigate the stability of Alfven waves in a multi-ion plasma that specifically contains Oions since the discovery of these ions was an unexpecte ...
... Programme schedule, including activity diagram/ Bar chart:During the first six months of the first year we propose to derive the dispersion relation and investigate the stability of Alfven waves in a multi-ion plasma that specifically contains Oions since the discovery of these ions was an unexpecte ...
Erratum - Forward
... vary from one diffractometer to another. The b / a relationship results in 0.84 wt.% H2O for sample WH2120 and 1.66 wt.% H2O for SS0401. Water contents for all samples studied by Brillouin spectroscopy in this study are listed in Table 1. Because there is no absolute calibration for water in wadsley ...
... vary from one diffractometer to another. The b / a relationship results in 0.84 wt.% H2O for sample WH2120 and 1.66 wt.% H2O for SS0401. Water contents for all samples studied by Brillouin spectroscopy in this study are listed in Table 1. Because there is no absolute calibration for water in wadsley ...
Elastic Wave Propagation in Anisotropic Media: Migration
... Next, we derive analytical expressions for the traveltime-offset curves for multilayered, weakly azimuthally isotropic and anisotropic media in terms of the elastic properties of each layer. This method is based upon an approximate skewed hyperbolic moveout formula involving three measured bulk vel ...
... Next, we derive analytical expressions for the traveltime-offset curves for multilayered, weakly azimuthally isotropic and anisotropic media in terms of the elastic properties of each layer. This method is based upon an approximate skewed hyperbolic moveout formula involving three measured bulk vel ...
Three-dimensional ionospheric tomography of post
... arrival of seismic surface waves on the ground. This signal does not appear on the previous and following days. This perturbation has been described in detail by Ducic et al. (2003). The peak-to-peak amplitude of this signal is six times larger than the average noise level at 2σ in this frequency ba ...
... arrival of seismic surface waves on the ground. This signal does not appear on the previous and following days. This perturbation has been described in detail by Ducic et al. (2003). The peak-to-peak amplitude of this signal is six times larger than the average noise level at 2σ in this frequency ba ...
Vol. 7 No. 2
... of a wind discontinuity resulting in a maximum of cyclonic wind shear (or cyclonic vorticity) at the front. It is therefore of interest to investigate the factors creating and maintaining cyclonic vorticity at the fronts. The aim of this paper is to contribute to the solution of this problem. ...
... of a wind discontinuity resulting in a maximum of cyclonic wind shear (or cyclonic vorticity) at the front. It is therefore of interest to investigate the factors creating and maintaining cyclonic vorticity at the fronts. The aim of this paper is to contribute to the solution of this problem. ...
Shear wave splitting
Shear wave splitting, also called seismic birefringence, is the phenomenon that occurs when a polarized shear wave enters an anisotropic medium (Fig. 1). The incident shear wave splits into two polarized shear waves (Fig. 2). Shear wave splitting is typically used as a tool for testing the anisotropy of an area of interest. These measurements reflect the degree of anisotropy and lead to a better understanding of the area’s crack density and orientation or crystal alignment.We can think of the anisotropy of a particular area as a black box and the shear wave splitting measurements as a way of looking at what is in the box.