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geodesy

Artist’s concept of the twin satellites in the GRACE program
Posted inResearch Spotlights

Fresh Approaches to Processing GRACE Data

Sarah Derouin, Science Writer by Sarah Derouin 24 March 202221 December 2022

Two studies showcase new methods for analyzing GRACE data that better match the land surface, producing clearer estimates of mass variations.

Time series of the vertical daily average displacement of continuous GNSS station.
Posted inEditors' Highlights

Continuity is the Father of Success

by Yosuke Aoki 15 February 202215 November 2022

Geodetic measurements indicate that Three Sisters Volcano uplifted by almost 300 millimeters in the past 25 years without significant anomalies at the surface.

Illustration of an atom being held in place by six lasers.
Posted inFeatures

Lasers and Ultracold Atoms for a Changing Earth

by Michel Van Camp, F. Pereira dos Santos, Michael Murböck, Gérard Petit and Jürgen Müller 20 December 20219 March 2023

Applying new technology rooted in quantum mechanics and relativity to terrestrial and space geodesy will sharpen our understanding of how the planet responds to natural and human-induced changes.

A comparison between (left) earthquake motion derived from daily geodetic observations (blue arrows) and the approach of Golriz et al. (red arrows) and (right )the net difference between these methods.
Posted inResearch Spotlights

Improving Coseismic Slip Measurements

by Morgan Rehnberg 29 November 202111 May 2022

A physics-based method estimates the duration of earthquakes’ coseismic phase and can help improve the precision of coseismic slip models and magnitude estimates.

Series of six figures showing recovered fault geometry and slip models, from early to late stages in the inversion procedure.
Posted inEditors' Highlights

New Inversion Method Improves Earthquake Source Imaging

by Cécile Lasserre 30 August 20218 December 2022

A new method uses Bayesian inference to jointly invert for non-planar fault geometry and spatially variable slip (with associated uncertainties) in earthquake source modeling, based on geodetic data.

Panel showing VLBI, SLR, and GNSS systems
Posted inNews

Evolving the Geodetic Infrastructure

by Jack Lee 28 July 202119 November 2021

Enhancements to the largely invisible framework will enable researchers to investigate pressing questions about our planet’s future.

Posted inAGU News

Kristine M. Larson Receives 2020 Charles A. Whitten Medal

by AGU 25 May 202128 October 2021

Kristine M. Larson was awarded the 2020 Charles A. Whitten Medal at the virtual AGU Fall Meeting in December. The medal is for “outstanding achievement in research on the form and dynamics of the Earth and planets.”

Three maps of the study area showing the probability of a specific density value occurring in different models.
Posted inEditors' Highlights

Understanding Where and How Magma is Stored

by M. Pistolesi 17 May 202112 October 2021

Gravity measurements reveal depth and storage conditions of rhyolitic magma reservoirs beneath the Laguna del Maule volcanic field in Chile.

Black and white photo showing a damaged road and storefronts in Anchorage, Alaska, following the March 1964 earthquake
Posted inScience Updates

Slipping and Locking in Earth’s Earthquake Factories

by N. Bartlow, L. M. Wallace, J. Elliott and S. Schwartz 24 March 202122 March 2022

Geodetic observations collected during back-to-back decadal research campaigns have revealed crucial new insights into the start–stop and slow-motion behavior of subduction zones.

View of Long Valley Caldera in California with snow-covered mountains in the background
Posted inResearch Spotlights

How Heavy Rain and Drought Influence California Crustal Strain

Kate Wheeling, freelance science writer by Kate Wheeling 27 January 20216 October 2021

New research using continuous GPS data reveals how multiyear precipitation patterns can amplify the effects of hydrological loading on crustal deformation.

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