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Geophysics Internet Resources


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Elevation correction and the geoid tutorial part of SERC Web Resource Collection

The Earth is not a perfect sphere, but is instead more like a slightly squashed sphere called an ellipsoid. Because of this, GPS receivers must use a correction model (called a geoid) to calculate ...

The geoid and receiver measurements tutorial part of SERC Web Resource Collection

This web page explains how differences in the gravity at different places on Earth requires GPS receivers use additional corrections to find the true elevation of places on Earth's surface. The ...

Selective availability and the GPS receiver tutorial part of SERC Web Resource Collection

This website explains how the process of selective availability is used by the USA government to limit the accuracy of locations determined by GPS receivers.

InSAR: What it is and why you should care part of SERC Web Resource Collection

Provides an overview of what Interferometric Synthetic Aperture Radar (InSAR) is and how it is used to measure surface motion for a variety of geoscience fields. Based on an article originally ...

GRACE: Tracking water from space part of SERC Web Resource Collection

This 7-minute video gives an overview of the GRACE (Gravity Recovery and Climate Experiment) satellites and explains the technique of using gravity to measure mass movement such changing as ice and ...

Recent Advances in Mars Tectonics part of SERC Web Resource Collection

This short article from the Jet Propulsion Laboratory features a pre-plate tectonic overview of the tectonic features and processes on Mars. The summary discusses how advances in knowledge expected ...

Corrections of the Indian gauge data used for early assessments of the great 26 December 2004 earthquake part of SERC Web Resource Collection

This resource is an abstract. This study re-evaluates slip velocity over the region of the December 26, 2004 Sumatra-Andaman earthquake. Using new data, the authors found that a mixed mode of slip ...

Listening to the 2004 Indian Ocean tsunami quake part of SERC Web Resource Collection

This resource is an abstract. This study tracks the movement of the rupture that caused the December 26, 2004 Indian Ocean tsunami by comparing recordings of sound waves from five sensors located ...

Magma shakes up earthquake locations part of SERC Web Resource Collection

Numerical models were employed to examine the relationships between the orientation of volcanotectonic faults and magma movement. It was found that the direction of movement on strike-slip faults ...

How volcanic eruptions cause tsunamis part of SERC Web Resource Collection

This study investigates the effect of pyroclastic flows on tsunami generation. The authors analyzed several possible mechanisms that occur when the particle rich flows encounter water and conclude ...


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