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geophysics

Black and white image taken from the air of a massive plume of smoke and a pyrocumulonimbus cloud over Earth’s surface
Posted inOpinions

Geoscientists Can Help Reduce the Threat of Nuclear Weapons

by Alan Robock and Stewart C. Prager 2 December 20213 December 2021

A nuclear war would claim many lives from its direct impacts and cause rapid climate change that would further imperil humanity. Scientists can help shape policies to put us on a safer path.

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.

Posted inEditors' Highlights

Order in Turbulence

by B. Stevens 21 September 202116 September 2022

Extracting order from turbulence is difficult, even under the most idealized conditions. A new scaling theory quantifies how eddies influence temperature gradients in geophysical turbulence.

Figure showing different perspectives on deep learning.
Posted inEditors' Vox

When Deep Learning Meets Geophysics

by J. Ma and S. Yu 1 September 20212 March 2022

Traditional physical models are no longer the only foundational tools for processing geophysical data; “big data” help to reveal the laws of geophysics from new angles with exciting results so far.

Two images comparing a high-resolution pore network in rock and a reconstruction of the same by the machine learning model.
Posted inEditors' Highlights

Reconstructing Rocks with Machine Learning

by D. O'Malley 12 July 20213 October 2022

Machine learning can be used to accurately reconstruct high-resolution, 3D images of rocks from 2D cross-sections, which opens the door to more detailed simulations.

Grayscale scanning electron microscope image of an unpolished tetrahedral zircon crystal with two laser ablation pits, each between 25 and 30 micrometers in diameter
Posted inNews

Vestiges of a Volcanic Arc Hidden Within Chicxulub Crater

by Alka Tripathy-Lang 15 June 202129 September 2022

Scientists discovered magmatic remnants of a volcanic arc by dating granitic rocks of the middle crust excavated by, and hidden within, the Chicxulub impact crater.

Illustration of the spacecraft of NASA’s Magnetospheric Multiscale mission in space in front of reconnecting magnetic field lines
Posted inResearch Spotlights

Spacecraft Reveal New Details of Magnetic Reconnection

by Morgan Rehnberg 15 February 202118 July 2023

Energetic electrons are accelerated directly by magnetic reconnections and can act as tracers of large-scale magnetic field conditions.

Plot showing aftershocks triggered by the 1992 Landers earthquake in California and Coulomb stress changes
Posted inEditors' Highlights

The Failure of Physics-Based Earthquake Forecasting Models

by Agnes Helmstetter 12 February 20219 March 2023

Spatial clustering of aftershocks explains why simple statistical models often outperform complex physics‐based earthquake forecasting models even if the physical mechanisms are correctly modeled.

Figure showing channel cross section geometry and erosion potential simulated with a comprehensive morphodynamic model at different stages of the channel evolution
Posted inEditors' Highlights

Stream Hydraulic Geometry 1.01

by Valeriy Ivanov 7 December 202015 February 2023

New research provides a theoretical explanation of channel cross section geometry dependence on flow rate that is commonly observed and described with power-laws.

Detector and lightning locations for two observed events in Kanazawa, Japan
Posted inEditors' Highlights

Lightning Discharge Type Linked to Terrestrial Gamma‐Ray Flashes

by Minghua Zhang 1 September 202013 February 2023

For the first time, the connection between energetic in cloud pulse and terrestrial gamma‐ray flashes is confirmed in the Gamma-Ray Observation of Winter Thunderclouds experiment in Japan.

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Research Spotlights

More Bubbles Means More Variation in Ocean Carbon Storage

8 July 20258 July 2025
Editors' Highlights

The Power of Naming Space Weather Events

10 July 20258 July 2025
Editors' Vox

Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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