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.
Advertisement ...Animation showing both LLSVPs created using seismic tomography ... Garnero, together with other geologists at ASU, published a review about the giant mantle globs in 2016 using bucketloads of seismic, geochemical, and mineral physics data ... .
AmbientNoise Tomography Survey (ANT) The ANT survey is a passive seismic technique that utilizes naturally occurring ambient noise, such as ocean wave activity, wind, human activities, and atmospheric disturbances, to generate seismic waves.
The underground tunnels were revealed using a combination of ground penetrating radar, electric resistivity tomography, and seismic noise tomography. Instead of electricity, seismic noise tomography ...
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).
The 2D seismic line adds complementary geologic detail to the existing ambient noise tomography (passive seismic) data which indicates a slowed seismic velocity layer beneath the current total depth of the Jetstream #1 well.
The team also analyzed seismic tomography models to identify the most likely subducted ocean floor inside the Earth's interior which could be the source of the Afar plume's geochemical fingerprint.
Using advanced geophysical technologies, including ground-penetrating radar, electric resistivity tomography, and seismic tomography, the team from ARXProject Lyobaa has provided the first solid evidence of what was long suspected.
A sophisticated strategy called anisotropic seismic tomography has enabled researchers to collect unmatched understandings of the framework of the Earth’s crust in the Etna area.
For simplicity, many of these seismic tomography studies assume seismic waves will travel through the crust and mantle at the same speed regardless of the direction they travel—that is, they assume these materials are "isotropic."
An international team of scientists has been monitoring the volcanic activity over the past three years, using advanced techniques like seismic tomography imaging and geochemical analysis. .
Analyzing seismic tomography imaging and the composition of lava samples, they've uncovered parts of the geological processes behind the new volcanic era ... Using geochemical and seismic data, the ...
al., 2021) have demonstrated that magmatic intrusions, hydrothermal alteration and faults can manifest as zones of high and low seismic velocity ...Seismic imaging of the Caosiyao giant porphyry molybdenum deposit using ambient noise tomography.
