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geodesy

背景是群山和蓝天,前景是绿色的牧场。一条路从前景延伸到群山。
Posted inResearch Spotlights

新的构造板块模型可改进地震风险评估

by Morgan Rehnberg 18 January 202319 January 2023

新西兰构造板块的一个新模型可以识别地震可能性增加的区域。

Mountains and blue sky in the background, with green pastures in the foreground. A road extends from the foreground toward the mountains.
Posted inResearch Spotlights

New Tectonic Plate Model Could Improve Earthquake Risk Assessment

by Morgan Rehnberg 21 December 202218 January 2023

A new model of tectonic plates in New Zealand may identify areas of increased earthquake likelihood.

A GPS sensor sits atop the edge of a rocky cliff overlooking a steep slope down to water in the distance.
Posted inResearch Spotlights

Enhancing Earthquake Detection from Orbit

Sarah Stanley, Science Writer by Sarah Stanley 2 December 20222 December 2022

A new application of machine learning boosts scientists’ ability to use data from satellite navigation systems to detect and warn of earthquakes.

A glacier cascades down the side of a mountain along the left side of this photograph. In the foreground is a shallow glacial lake that transitions from clear to icy blue and has numerous pebbles and smooth rocks strewn along the bottom. The sky is bright blue but shielded by low hanging clouds.
Posted inResearch Spotlights

Models Oversimplify How Melting Glaciers Deform Land

by Saima May Sidik 7 September 202228 September 2022

When glaciers melt, the land below deforms. Sea level data show that widely used models oversimplify the process.

Seawater washes over a cracked roadway along a shoreline
Posted inFeatures

Sea Level Science and Applications Support Coastal Resilience

by Nadya Vinogradova and Benjamin Hamlington 29 June 20221 August 2022

Known for precise, planetary-scale measurements, NASA is improving its decades-long effort to observe and understand sea levels to help communities prepare for the effects of Earth’s rising ocean.

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.

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By Luke C. Skinner and Edouard Bard

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