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magnetic fields & magnetism

Data cube acquired via a remote imaging spectrometer, with two spatial dimensions and one spectral dimension
Posted inOpinions

Realizing Machine Learning’s Promise in Geoscience Remote Sensing

by D. Thompson and P. G. Brodrick 8 July 20215 October 2021

Machine learning and signal processing methods offer significant benefits to the geosciences, but realizing this potential will require closer engagement among different research communities.

Seventeenth century Reinier Nooms painting of ships
Posted inNews

Scientists Mine 16th Century Ship Logs for Geophysical Research

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 17 May 20215 March 2026

Compass measurements held a key to unlocking the mystery of Earth’s magnetic field and its changes over time. A historian-turned-geoscientist found the measurements in an unlikely place—merchant ship logs.

A series of panels showing the substantial number of new quality data published for the three geomagnetic elements, declination (left), inclination (center), and intensity (right) with geographical distribution on the top row and temporal distribution on the bottom row.
Posted inEditors' Highlights

New Spherical Cap Field Model for Europe and Direct Environs

by Mark J. Dekkers 14 May 202121 July 2022

New data on ancient burnt structures is integrated into a superior spherical cap field model for Europe.

Five plots showing the paleosecular variation of the geomagnetic field in the composite record from Black Sea cores.
Posted inEditors' Highlights

Marine Isotope Stage 6: First High-Resolution Field Record

by Mark J. Dekkers 12 May 202127 January 2023

A 200-year resolution record from the Black Sea for marine isotope stage 6 (130-180 ka) shows a stable geomagnetic field.

Two models of the surface magnetic field of Saturn
Posted inEditors' Highlights

Saturn’s Dynamo Illuminates its Interior

by F. Nimmo 5 May 202115 March 2022

Saturn’s oddly symmetrical magnetic field can be explained by models in which the active dynamo region is overlain by a thick, stable layer cooled more strongly at the poles.

上行闪电很罕见,但更常见的闪电类型可以增加上行闪电发生的可能性。
Posted inResearch Spotlights

附近闪电事件触发上行闪电

Elizabeth Thompson by Elizabeth Thompson 26 April 202113 April 2023

雷暴中的闪电以某种方式改变了电磁场,从而引发高层建筑物向上发出闪电。

Upward lightning is uncommon, but more common types of lightning can make it more likely to occur.
Posted inResearch Spotlights

Upward Lightning Takes Its Cue from Nearby Lightning Events

Elizabeth Thompson by Elizabeth Thompson 9 April 202117 August 2022

Lightning in a thunderstorm changes the electromagnetic field in a way that sparks upward lightning from tall structures.

Map of magnetic anomaly field intensity in the study area in the Pacific Ocean
Posted inEditors' Highlights

Probing the Age of the Oldest Ocean Crust in the Pacific

by Mark J. Dekkers 5 April 202127 January 2023

A new study extends the calibration of the Mesozoic Sequence down to the Mid Jurassic with multiscale marine magnetic anomaly data, demonstrating extraordinarily high reversal frequency.

King Edward Point magnetic observatory near Mount Duse on the island of South Georgia
Posted inScience Updates

Modernizing a Global Magnetic Partnership

by A. W. P. Thomson and S. M. Flower 31 March 202118 April 2022

For 30 years, INTERMAGNET, a worldwide network of ground-based observatories, has aided advances in navigation, precision drilling for oil and gas, and mitigating space weather impact on technology.

Red rocks of the Chinle Formation at Petrified Forest National Park
Posted inNews

Red Rocks: Using Color to Understand Climate Change

by R. Mazumdar 30 March 20213 January 2023

A recent study on hematite formation during the Triassic may help predict the effects of climate change on contemporary monsoonal environments.

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