Detailed motion of Earth's crust - accurate to mm/year

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In summary, Synthetic Aperture Radar (SAR) interferometry (InSAR) has been used to create precise images of crustal movement, with the ability to detect displacements as small as a few millimeters per year. This technology has been primarily used for monitoring seismic zones and volcanoes, but there is potential for other applications such as studying gravity anomalies and testing alternative theories to GR. It may also be useful for missions to other planets such as Venus, Mars, or Io to study crustal movements. However, current SAR technology has limitations in terms of resolution.
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Synthetic Aperture Radar (SAR) interferometry (InSAR) has been used to make detailed crustal movement images, showing relative displacements of as small as a few millimetres per year, according to this Envisat ESA PR. Although the PR talks about using InSAR for monitoring seismic zones and volcanos, I wonder if it could also be used for other Earth studies. For example, combined with GRACE results, to better characterise the nature of gravity anomolies? to test some of the alternative theories to GR (such as SCC)?

Perhaps the same technology could be deployed on a Venus, Mars, or Io mission, to determine the extent of any crustal movements? :approve:
 
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Amazing, the current airborne SAR's give a highest resolution in spot mode only of some 4 inches (10 cm) ROM whilst satellite SAR resolution under two feet (half a meter) is unheard of. I wonder about detecting techniques of changes in mm. It seems like grabbing a needle with boxing gloves.

Yes Venus would be a good target. There are still 5 unanswered hypotheses about the tectonics on Venus.
 
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The use of Synthetic Aperture Radar (SAR) interferometry (InSAR) for monitoring and mapping the motion of Earth's crust is an impressive technological advancement. With the ability to detect relative displacements as small as a few millimetres per year, this method provides a highly detailed and accurate view of crustal movements.

While the focus of the Envisat ESA PR is on the application of InSAR for monitoring seismic zones and volcanoes, it is certainly possible that this technology could also be used for other Earth studies. For example, combining InSAR data with results from the Gravity Recovery and Climate Experiment (GRACE) could provide valuable insights into the nature of gravity anomalies and potentially test alternative theories to General Relativity, such as the Scalar-Vector-Tensor theory.

Furthermore, the capabilities of InSAR could potentially be extended beyond Earth to other planetary bodies such as Venus, Mars, or Io. Deploying this technology on future missions to these bodies could provide valuable information on the extent of crustal movements and help us better understand their geology and evolution. Overall, InSAR has the potential to greatly enhance our understanding of the dynamics of Earth's crust and other celestial bodies.
 

What is the detailed motion of Earth's crust?

The detailed motion of Earth's crust refers to the specific movements and changes that occur on the Earth's surface over time. This includes the displacement, rotation, and deformation of the Earth's crust, which can be measured accurately to the millimeter per year.

Why is it important to study the detailed motion of Earth's crust?

Studying the detailed motion of Earth's crust is crucial for understanding the dynamic processes that shape our planet. It can help us predict and prepare for natural disasters such as earthquakes and volcanic eruptions, as well as track the effects of climate change and human activities on the Earth's surface.

How is the detailed motion of Earth's crust measured accurately to mm/year?

The detailed motion of Earth's crust is measured using a variety of techniques, including GPS (Global Positioning System) satellites, satellite radar interferometry, and ground-based surveys. These methods allow scientists to track the movement of specific points on the Earth's surface over time and calculate the precise rate of motion in millimeters per year.

What factors affect the detailed motion of Earth's crust?

The detailed motion of Earth's crust is influenced by a variety of factors, including tectonic plate movements, volcanic activity, erosion and sedimentation, and human activities such as land use and groundwater extraction. Changes in these factors can result in variations in the rate and direction of crustal motion over time.

How does the detailed motion of Earth's crust contribute to our understanding of plate tectonics?

The detailed motion of Earth's crust plays a key role in the study of plate tectonics, as it provides evidence for the movement and interaction of tectonic plates. By tracking the precise movements of the Earth's crust, scientists can better understand the processes behind plate tectonics, such as subduction, seafloor spreading, and continental drift.

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