magnetic fields & magnetism Archives - Page 28 of 33

Marine magnetometer on board and at sea during recovery.

Making a Better Magnetic Map

by M. Catalán, J. Dyment, Y. Choi, M. Hamoudi, V. Lesur, E. Thébault, A. de Santis, T. Ishihara, J. Korhonen, T. Litvinova, J. Luis, B. Meyer, P. Milligan, M. Nakanishi, S. Okuma, M. Pilkington, M. Purucker, D. Ravat, C. Gaina, S. Maus, Y. Quesnel, R. Saltus and P. Taylor 27 June 201620 December 2021

A new version of the World Digital Magnetic Anomaly Map, released last summer, gives greater insight into the structure and history of Earth's crust and upper mantle.

Research Spotlights

Patches of Low Electron Density Help to Heat the Ionosphere

by A. K. Higginson 23 June 201612 October 2022

Simulations show how changes in electron density can trap electromagnetic waves and heat electrons in the ionosphere.

Editors' Vox

Chasing Down the Slow Solar Wind

by L. E. Kepko 20 June 201618 July 2023

The Sun's plasma blasts Earth’s magnetosphere at more than a million miles per hour. The fastest pours from holes in the corona, but until recently the source of the "slow" solar wind was a mystery.

Topography and bathymetry around Greenland overlain with ancient slab material projected from 1400 kilometers depth.

Research Spotlights

Evidence of an Extinct Ocean Basin Detected Beneath Greenland

by Terri Cook 25 May 201611 January 2022

An analysis of a seismic and gravity anomaly discovered in the middle mantle sheds new light on ancient oceans, the mantle's evolution, and ancient magmatism in the Arctic.

Editors' Vox

Polarity Reversals in the Earth’s Magnetic Field

by Fabio Florindo 29 April 201627 January 2023

Studies of geomagnetic polarity reversals have generated some of the biggest and most interesting debates in the paleomagnetic and wider solid Earth geophysics communities over the last 25 years.

Research Spotlights