Seismic tomography is a technique for imaging Earth’s sub-surface characteristics in an effort to understand deep geologic structure. Gathering ample compressional wave (P-wave) and transverse wave (S-wave) travel time measurements allows us to compile 3D images of earth’s velocity structure.
Theory
Tomography is solved as an inverse problem. First measurements are made of seismic waves passing through a material. The character of these measurements is then analyzed to make inferences on the material such waves have passed through (velocity, density, etc.). The velocity of p and s waves depends on the rheology of the material that they travel through (density and elasticity). In short, variations in chemical compositions and thermal structure result in a change of velocity. Such waves can travel faster through relatively colder material. It is observed that wave velocity increases with increasing depth from 2–8km/s in the crust up to 13km/s in the mantle. Current research is based on this premise.
In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chamber for simplicity. For reference, the Earth figures below show the difference between our simple animation and a body with changes in rock type and temperature that cause the seismic waves to refract and bend when transmitted between different rock compositions.
More Info at:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
published: 07 Nov 2008
3D Seismic Tomography
The GSR-3D ground imaging system of Geostructural Seismic Research Inc. is a complete 3D distributed digital seismic ground imaging system designed for engineers. GSR 3D tomography imaging and analysis software allows engineers to acquire data and produce accurate 3D images of the subsurface in near real-time. The GSR system can be used to map bedrock, underground geologic structures, landfills,
abandoned wells, and a lot more. ... http://gsr-us.com (more info) (less info)
published: 06 Dec 2009
2D Seismic Refraction Tomography
This video provides an entire field demonstration of how to set up and do a 2D seismic refraction tomography. The method can image hundreds of feet. Seismic refraction tomography utilizes seismic (P and S) waves refracted on geological layers to image velocity contrasts of the subsurface. It works similar to the classical seismic refraction methods; however, data acquisition uses more seismic shots. Cordillera Geo-Services produces seismic survey services anywhere for multiple applications in environmental, engineering, mining, groundwater, and construction projects.
Contact information:
person: Dr. Hector R. Hinojosa, PG
website: www.cordillerageo.com
mobile: 737.207.2536
e-mail: [email protected]
Subscribe to our YouTube channel here: https://tinyurl.com/yxwpos5z
published: 05 Mar 2020
Seismic Tomography of Mantle Structure, Featuring LLSVP
3D Mantle Structured constructed from seismic data inversion. Color coding represents seismic velocity.
The 2 red structure, one beneath pacific ocean and one beneath Africa, are Large Low Shear Wave Provinces (LLSVPs). Both are contoured at - 0.9% value.
The model used in this animation is S40RTS.
published: 16 Jan 2019
Seismic Tomography Visualization
Seismic Tomography Visualization Cyber-ShARE Center of Excellence UTEP
published: 20 Dec 2012
Seismic tomography | 073
published: 13 Nov 2021
Seismic Tomography 1st Arrival of P waves to seismic stations
Narrated animation describing Seismic Tomography, an imaging technique using earthquakes to create three-dimensional images of the inside of the Earth.
For more detail visit:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
published: 14 Aug 2009
Basic principles of the seismic method | Seismic Principles
published: 15 Jun 2021
Finding a Part of the Earth that DISAPPEARED 20 Million Years Ago!
The mega-plate, which is a surprise discovery, disappeared some 20 million years ago after a series of subduction processes. Subscribe for daily content!
#shorts #2024 #news
published: 29 Aug 2024
Seismic Tomography and Interferometry: From Shallow to Deep
Date: April 24, 2013
Speaker: Fan-Chi Lin, Caltech
In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chambe...
In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chamber for simplicity. For reference, the Earth figures below show the difference between our simple animation and a body with changes in rock type and temperature that cause the seismic waves to refract and bend when transmitted between different rock compositions.
More Info at:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chamber for simplicity. For reference, the Earth figures below show the difference between our simple animation and a body with changes in rock type and temperature that cause the seismic waves to refract and bend when transmitted between different rock compositions.
More Info at:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
The GSR-3D ground imaging system of Geostructural Seismic Research Inc. is a complete 3D distributed digital seismic ground imaging system designed for engineer...
The GSR-3D ground imaging system of Geostructural Seismic Research Inc. is a complete 3D distributed digital seismic ground imaging system designed for engineers. GSR 3D tomography imaging and analysis software allows engineers to acquire data and produce accurate 3D images of the subsurface in near real-time. The GSR system can be used to map bedrock, underground geologic structures, landfills,
abandoned wells, and a lot more. ... http://gsr-us.com (more info) (less info)
The GSR-3D ground imaging system of Geostructural Seismic Research Inc. is a complete 3D distributed digital seismic ground imaging system designed for engineers. GSR 3D tomography imaging and analysis software allows engineers to acquire data and produce accurate 3D images of the subsurface in near real-time. The GSR system can be used to map bedrock, underground geologic structures, landfills,
abandoned wells, and a lot more. ... http://gsr-us.com (more info) (less info)
This video provides an entire field demonstration of how to set up and do a 2D seismic refraction tomography. The method can image hundreds of feet. Seismic ref...
This video provides an entire field demonstration of how to set up and do a 2D seismic refraction tomography. The method can image hundreds of feet. Seismic refraction tomography utilizes seismic (P and S) waves refracted on geological layers to image velocity contrasts of the subsurface. It works similar to the classical seismic refraction methods; however, data acquisition uses more seismic shots. Cordillera Geo-Services produces seismic survey services anywhere for multiple applications in environmental, engineering, mining, groundwater, and construction projects.
Contact information:
person: Dr. Hector R. Hinojosa, PG
website: www.cordillerageo.com
mobile: 737.207.2536
e-mail: [email protected]
Subscribe to our YouTube channel here: https://tinyurl.com/yxwpos5z
This video provides an entire field demonstration of how to set up and do a 2D seismic refraction tomography. The method can image hundreds of feet. Seismic refraction tomography utilizes seismic (P and S) waves refracted on geological layers to image velocity contrasts of the subsurface. It works similar to the classical seismic refraction methods; however, data acquisition uses more seismic shots. Cordillera Geo-Services produces seismic survey services anywhere for multiple applications in environmental, engineering, mining, groundwater, and construction projects.
Contact information:
person: Dr. Hector R. Hinojosa, PG
website: www.cordillerageo.com
mobile: 737.207.2536
e-mail: [email protected]
Subscribe to our YouTube channel here: https://tinyurl.com/yxwpos5z
3D Mantle Structured constructed from seismic data inversion. Color coding represents seismic velocity.
The 2 red structure, one beneath pacific ocean and one...
3D Mantle Structured constructed from seismic data inversion. Color coding represents seismic velocity.
The 2 red structure, one beneath pacific ocean and one beneath Africa, are Large Low Shear Wave Provinces (LLSVPs). Both are contoured at - 0.9% value.
The model used in this animation is S40RTS.
3D Mantle Structured constructed from seismic data inversion. Color coding represents seismic velocity.
The 2 red structure, one beneath pacific ocean and one beneath Africa, are Large Low Shear Wave Provinces (LLSVPs). Both are contoured at - 0.9% value.
The model used in this animation is S40RTS.
Narrated animation describing Seismic Tomography, an imaging technique using earthquakes to create three-dimensional images of the inside of the Earth.
For more...
Narrated animation describing Seismic Tomography, an imaging technique using earthquakes to create three-dimensional images of the inside of the Earth.
For more detail visit:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
Narrated animation describing Seismic Tomography, an imaging technique using earthquakes to create three-dimensional images of the inside of the Earth.
For more detail visit:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
The mega-plate, which is a surprise discovery, disappeared some 20 million years ago after a series of subduction processes. Subscribe for daily content!
#sho...
The mega-plate, which is a surprise discovery, disappeared some 20 million years ago after a series of subduction processes. Subscribe for daily content!
#shorts #2024 #news
The mega-plate, which is a surprise discovery, disappeared some 20 million years ago after a series of subduction processes. Subscribe for daily content!
#shorts #2024 #news
In this animation we simplify things and make an Earth of uniform density (isotropic; constant velocity sphere) with a slow zone that we image as a magma chamber for simplicity. For reference, the Earth figures below show the difference between our simple animation and a body with changes in rock type and temperature that cause the seismic waves to refract and bend when transmitted between different rock compositions.
More Info at:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
The GSR-3D ground imaging system of Geostructural Seismic Research Inc. is a complete 3D distributed digital seismic ground imaging system designed for engineers. GSR 3D tomography imaging and analysis software allows engineers to acquire data and produce accurate 3D images of the subsurface in near real-time. The GSR system can be used to map bedrock, underground geologic structures, landfills,
abandoned wells, and a lot more. ... http://gsr-us.com (more info) (less info)
This video provides an entire field demonstration of how to set up and do a 2D seismic refraction tomography. The method can image hundreds of feet. Seismic refraction tomography utilizes seismic (P and S) waves refracted on geological layers to image velocity contrasts of the subsurface. It works similar to the classical seismic refraction methods; however, data acquisition uses more seismic shots. Cordillera Geo-Services produces seismic survey services anywhere for multiple applications in environmental, engineering, mining, groundwater, and construction projects.
Contact information:
person: Dr. Hector R. Hinojosa, PG
website: www.cordillerageo.com
mobile: 737.207.2536
e-mail: [email protected]
Subscribe to our YouTube channel here: https://tinyurl.com/yxwpos5z
3D Mantle Structured constructed from seismic data inversion. Color coding represents seismic velocity.
The 2 red structure, one beneath pacific ocean and one beneath Africa, are Large Low Shear Wave Provinces (LLSVPs). Both are contoured at - 0.9% value.
The model used in this animation is S40RTS.
Narrated animation describing Seismic Tomography, an imaging technique using earthquakes to create three-dimensional images of the inside of the Earth.
For more detail visit:
http://www.iris.edu/hq/programs/education_and_outreach/aotm/7
The mega-plate, which is a surprise discovery, disappeared some 20 million years ago after a series of subduction processes. Subscribe for daily content!
#shorts #2024 #news
Seismic tomography is a technique for imaging Earth’s sub-surface characteristics in an effort to understand deep geologic structure. Gathering ample compressional wave (P-wave) and transverse wave (S-wave) travel time measurements allows us to compile 3D images of earth’s velocity structure.
Theory
Tomography is solved as an inverse problem. First measurements are made of seismic waves passing through a material. The character of these measurements is then analyzed to make inferences on the material such waves have passed through (velocity, density, etc.). The velocity of p and s waves depends on the rheology of the material that they travel through (density and elasticity). In short, variations in chemical compositions and thermal structure result in a change of velocity. Such waves can travel faster through relatively colder material. It is observed that wave velocity increases with increasing depth from 2–8km/s in the crust up to 13km/s in the mantle. Current research is based on this premise.
This included data on the evolution of surface topography, deformation of the lithosphere (crust and uppermost mantle) and seismic tomography (a technique that uses seismic waves to generate 3D models of Earth's interior).
With a technique called seismic tomography, researchers use the shape of traveling seismic waves from nearby or distant earthquakes to create 3D images of inner Earth, allowing them to "see" hundreds of kilometers below the surface.
Last year, the researchers used a combination of three scanning technologies — ground-penetrating radar, electrical resistivity tomography and seismic noise tomography — to generate 3D images of what lay below.
Their research findings, titled "Compositional and thermal state of the lower mantle from joint 3D inversion with seismic tomography and mineral elasticity," were published in the journal Proceedings of the National Academy of Sciences.
Seismic tomography, a technique that uses seismic waves from remote earthquakes to create 3D images of Earth’s interior, has provided valuable insights ... Seismic hazards in these areas can also be much more uncertain.
A new seismic tomography model using a ...Seismic tomography, much like CT scanning in medical imaging, allows us to make geological inferences from 3D variations of seismic wave speed in the subsurface.
Seismic tomography is a method to estimate the inaccessible three-dimensional (3D) seismic material properties of the Earth, specifically the speeds of compressional and shear waves related composition and temperature variations.