Seismology of stellar envelopes: probing the outer layers of a star
... Our analysis is carried out for stars whose background states are spherically symmetrical; however, we note that, provided due care is taken, the results can be applied to aspherical stars having a relatively gentle horizontal variation in their surface layers. ...
... Our analysis is carried out for stars whose background states are spherically symmetrical; however, we note that, provided due care is taken, the results can be applied to aspherical stars having a relatively gentle horizontal variation in their surface layers. ...
Dynamic coupling between shallow-water sloshing and horizontal
... the nonlinearities. This coupled numerical scheme is effective for waves which come close to breaking because the implicit scheme has a dissipative interface. However, in order to model long time oscillatory behaviour a scheme which conserves energy is of interest. Re-thinking the problem led us to ...
... the nonlinearities. This coupled numerical scheme is effective for waves which come close to breaking because the implicit scheme has a dissipative interface. However, in order to model long time oscillatory behaviour a scheme which conserves energy is of interest. Re-thinking the problem led us to ...
DENSITY-VELOCITY RELATIONSHIP IN THE UPPER
... influence of pressure on P-wave velocity of rapakivi granites having low density comparing to other types of granitoids. Extensive laboratory studies of elastic properties of granitoids of the Ukrainian Shield under confining pressures and temperatures corresponding to the present-day geotherm were ...
... influence of pressure on P-wave velocity of rapakivi granites having low density comparing to other types of granitoids. Extensive laboratory studies of elastic properties of granitoids of the Ukrainian Shield under confining pressures and temperatures corresponding to the present-day geotherm were ...
Lithosphere–asthenosphere P-wave reflectivity across Australia
... low the crust with a strong gradient to a depth near 90 km where the S wavespeeds reach typical cratonic values (see, e.g., Kennett et al., 2013a; Yoshizawa, 2014). The consistent change in both amplitude and frequency content at D appears to mark the base of this gradient in wavespeeds. For longer ...
... low the crust with a strong gradient to a depth near 90 km where the S wavespeeds reach typical cratonic values (see, e.g., Kennett et al., 2013a; Yoshizawa, 2014). The consistent change in both amplitude and frequency content at D appears to mark the base of this gradient in wavespeeds. For longer ...
Chapter 3: Travel time tomography of the uppermost mantle beneath
... of the years 1964 to 2000 (E.R. Engdahl, pers. comm., hereafter referred to as EHB data). This new version was extended with data from 1995 to 2000 and includes particularly more regional data (i.e. with an epicentral distance < 28◦ ) than the original data set as a result of less restrictive select ...
... of the years 1964 to 2000 (E.R. Engdahl, pers. comm., hereafter referred to as EHB data). This new version was extended with data from 1995 to 2000 and includes particularly more regional data (i.e. with an epicentral distance < 28◦ ) than the original data set as a result of less restrictive select ...
Getting something for nothing: noise attenuation in an aliased world
... geophone groups commonly deployed over much of the history of seismic exploration. When singlesensor data are acquired, the sensor spacing should be decreased to allow the acquisition geometry to spatially sample the outgoing source-generated surface waves and refractions with minimal aliasing. Vari ...
... geophone groups commonly deployed over much of the history of seismic exploration. When singlesensor data are acquired, the sensor spacing should be decreased to allow the acquisition geometry to spatially sample the outgoing source-generated surface waves and refractions with minimal aliasing. Vari ...
TSUNAMI WARNING SYSTEM TO MOBILE
... For people living near the coast, the shaking of the ground is sufficient warning for an impending tsunami. A noticeable rapid raise or fall in coastal waters is also a sign that a tsunami is approaching. Some tribals in Andaman like Centenaries, Shanghais, Ongeys, Jaravas can predict these tsunamis ...
... For people living near the coast, the shaking of the ground is sufficient warning for an impending tsunami. A noticeable rapid raise or fall in coastal waters is also a sign that a tsunami is approaching. Some tribals in Andaman like Centenaries, Shanghais, Ongeys, Jaravas can predict these tsunamis ...
Pitt County Schools
... How can impulse be determined from a force vs. time graph? How is the velocity of an object related to its mass given that the impulse is constant? How can the relationship Ft p mv be used to analyze situation where an object is given an impulse. 5.04 Analyze one-dimensional interactions betw ...
... How can impulse be determined from a force vs. time graph? How is the velocity of an object related to its mass given that the impulse is constant? How can the relationship Ft p mv be used to analyze situation where an object is given an impulse. 5.04 Analyze one-dimensional interactions betw ...
Imaging the lithosphere beneath NE Tibet: teleseismic P and S body
... use recent surface wave models to construct a starting model for our teleseismic body wave inversion. We compare the results from our model with those from simpler starting models, and find that while the reduction in residuals and results for deep structure are similar between models, the results f ...
... use recent surface wave models to construct a starting model for our teleseismic body wave inversion. We compare the results from our model with those from simpler starting models, and find that while the reduction in residuals and results for deep structure are similar between models, the results f ...
MOTION ANALYSIS Prepared for the Televised Course "Physical Science: The Threshold
... This manual accompanies a video titled “Motion Analysis” that demonstrates each of the experiments listed. Each experiment is shown initially in real time, then in a series of slower, single frame shots. Students are encouraged to cover the television with blank overhead transparency sheets and reco ...
... This manual accompanies a video titled “Motion Analysis” that demonstrates each of the experiments listed. Each experiment is shown initially in real time, then in a series of slower, single frame shots. Students are encouraged to cover the television with blank overhead transparency sheets and reco ...
On the History of Inner Core Discovery - Beck-Shop
... Non-seismologists often think about probing the Earth in terms of seismic profiling with controlled sources where reflection and refraction principles can be used. However, probing the Earth’s deepest shells using high-quality earthquake waves (passive seismology) was not easy, particularly in the e ...
... Non-seismologists often think about probing the Earth in terms of seismic profiling with controlled sources where reflection and refraction principles can be used. However, probing the Earth’s deepest shells using high-quality earthquake waves (passive seismology) was not easy, particularly in the e ...
Large positive and negative lateral optical beam displacements due to... resonance
... or analyzed by plane wave expansion models,4,5 but the maximum longitudinal beam displacement is usually extremely small, because the penetration depth is of the same scale as the wavelength. However, large longitudinal beam shifts could be achieved by utilizing material6,7 or structural resonances. ...
... or analyzed by plane wave expansion models,4,5 but the maximum longitudinal beam displacement is usually extremely small, because the penetration depth is of the same scale as the wavelength. However, large longitudinal beam shifts could be achieved by utilizing material6,7 or structural resonances. ...
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 ...
Word Document
... Reflection occurs when sound waves encounter a different medium. This new medium can be a wall or in the case of ultrasound, a different type of tissue. A wall, for example, can produce an echo when someone’s voice travels to the wall. bounces off. and is reflected back to be heard as an echo. Sound ...
... Reflection occurs when sound waves encounter a different medium. This new medium can be a wall or in the case of ultrasound, a different type of tissue. A wall, for example, can produce an echo when someone’s voice travels to the wall. bounces off. and is reflected back to be heard as an echo. Sound ...
Chapter 11 - Wide-angle refraction and reflection - U
... to use large explosive charges, which are the natural controlled source replacement for earthquakes. Furthermore, earthquake sources are rich in shear waves, whereas most controlled sources are poor at generating shear waves. The combination of information on compressional wave velocities and shear ...
... to use large explosive charges, which are the natural controlled source replacement for earthquakes. Furthermore, earthquake sources are rich in shear waves, whereas most controlled sources are poor at generating shear waves. The combination of information on compressional wave velocities and shear ...
Rays in spherically symmetric media
... the liquid core, which has lower velocity than the overriding mantle, makes the core well suited to seismological studies using refracted, transmitted, converted and diffracted arrivals. The inner core boundary also represents a strong contrast in physical properties, and along with the outer core b ...
... the liquid core, which has lower velocity than the overriding mantle, makes the core well suited to seismological studies using refracted, transmitted, converted and diffracted arrivals. The inner core boundary also represents a strong contrast in physical properties, and along with the outer core b ...
Abstract
... seismograms from point sources are back-projected. For the majority of the synthetic tests synthetic seismograms are generated using Ricker wavelets [Ricker, 1953] with assigned central frequencies and amplitudes. The arrival times of these wavelets at each station in the seismic arrays (F-net, Hi-n ...
... seismograms from point sources are back-projected. For the majority of the synthetic tests synthetic seismograms are generated using Ricker wavelets [Ricker, 1953] with assigned central frequencies and amplitudes. The arrival times of these wavelets at each station in the seismic arrays (F-net, Hi-n ...
Student Exploration Sheet: Growing Plants
... B. In general, how do you find the average velocity of any object falling in a vacuum? (Assume you know the final velocity.) _____________________________________ 3. Calculate: Distance, average velocity, and time are related by the equation, d = vaverage • t A. How much time did it take the rock to ...
... B. In general, how do you find the average velocity of any object falling in a vacuum? (Assume you know the final velocity.) _____________________________________ 3. Calculate: Distance, average velocity, and time are related by the equation, d = vaverage • t A. How much time did it take the rock to ...
Acceleration
... Higher speeds can be attained if the skydiver pulls in his limbs. In this case, the terminal velocity increases to about 320 km/h! ...
... Higher speeds can be attained if the skydiver pulls in his limbs. In this case, the terminal velocity increases to about 320 km/h! ...
Seismic Monitoring
... NIEP operates the national seismic network, consisting of 21 stations connected in real time and 46 free-field strong ground motion K2 seismic stations (Figure 1). Continuous digital acquisition of the seismological data has been carried out since 1991. The real-time seismic network has 9 stations e ...
... NIEP operates the national seismic network, consisting of 21 stations connected in real time and 46 free-field strong ground motion K2 seismic stations (Figure 1). Continuous digital acquisition of the seismological data has been carried out since 1991. The real-time seismic network has 9 stations e ...
Statistical Features of Seismic Noise
... of a same geological structure consisting of three different prototypical zones: an unconsolidated soil - alluvial deposit - zone (A), a firm soil - marl sandstone zone (C), and a transition - colluvial and debris deposit - zone (B) in between. As a matter of fact, these sites are Quaternary intramo ...
... of a same geological structure consisting of three different prototypical zones: an unconsolidated soil - alluvial deposit - zone (A), a firm soil - marl sandstone zone (C), and a transition - colluvial and debris deposit - zone (B) in between. As a matter of fact, these sites are Quaternary intramo ...
Seismic Observations during September 11, 2001, Terrorist Attack
... the nearest station, PAL (Palisades, NY), was only about 34 km away from the WTC. Analysis of Seismic Records for Pentagon Attack It was reported by the New York Times (B9, 10/06/2001) that at 09:36 (EDT) the crew of a military C-130 plane identified a Boeing 767 moving low and very fast, and that t ...
... the nearest station, PAL (Palisades, NY), was only about 34 km away from the WTC. Analysis of Seismic Records for Pentagon Attack It was reported by the New York Times (B9, 10/06/2001) that at 09:36 (EDT) the crew of a military C-130 plane identified a Boeing 767 moving low and very fast, and that t ...
Ocean wave sources of seismic noise
... [1] Noise with periods 3 to 10 s, ubiquitous in seismic records, is expected to be mostly generated by pairs of ocean wave trains of opposing propagation directions with half the seismic frequency. Here we present the first comprehensive numerical model of microseismic generation by random ocean wav ...
... [1] Noise with periods 3 to 10 s, ubiquitous in seismic records, is expected to be mostly generated by pairs of ocean wave trains of opposing propagation directions with half the seismic frequency. Here we present the first comprehensive numerical model of microseismic generation by random ocean wav ...
Seismic evidence for a chemical heterogeneity in the midmantle: A
... phase (1) shows a P wave particle motion, (2) arrives later from earthquakes with shallower focal depths, (3) has a steeper incident angle than that of P wave, and (4) shows a deviation of a few degrees in the arrival azimuth from that of P wave. We interpret it as an S-to-P converted wave which tak ...
... phase (1) shows a P wave particle motion, (2) arrives later from earthquakes with shallower focal depths, (3) has a steeper incident angle than that of P wave, and (4) shows a deviation of a few degrees in the arrival azimuth from that of P wave. We interpret it as an S-to-P converted wave which tak ...
3-D crustal structure of the extensional Granada Basin in the
... region. However, the low resolution of these results do not allow a detailed correlation between the tomographic results and shallow geological structures. In local earthquake tomography, body-wave arrival times are used to estimate P and S wave velocities and from these, we deduce variations in lit ...
... region. However, the low resolution of these results do not allow a detailed correlation between the tomographic results and shallow geological structures. In local earthquake tomography, body-wave arrival times are used to estimate P and S wave velocities and from these, we deduce variations in lit ...
Surface wave inversion
Inversion is the set of methods used to infer properties through physical measurements. Surface wave inversion is the method by which elastic properties, density, and thickness of layers in the subsurface are attained through analysis of surface wavedispersion. The entire inversion process requires the gathering of seismic data, the creation of dispersion curves, and finally the inference of subsurface properties.