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.
magnetic fields & magnetism
Posted inEditors' Vox
Chasing Down the Slow Solar Wind
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.
Posted inResearch Spotlights
Evidence of an Extinct Ocean Basin Detected Beneath Greenland
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.
Posted inResearch Spotlights
What Causes the Strange Pulses in Saturn's Magnetosphere?
A new model shows that a spiral wave may explain why many phenomena in the gas giant's magnetosphere undergo periodic cycles.
Posted inResearch Spotlights
Are Earthquakes Predictable?
Researchers have been searching for precursory warning signals for decades with little success.
Posted inResearch Spotlights
Can Meteorite Impacts Disturb a Planet's Magnetic Field?
Such disturbances probably do not occur on our own planet, but evidence for them might still exist elsewhere in the solar system.
Posted inResearch Spotlights
Cassini Observes First Evidence of Saturn's Ionospheric Outflow
Evidence shows the ionosphere may contribute as much mass as the moon Enceladus.
Posted inResearch Spotlights
Satellites Test Theory of Magnetic Reconnection
A quartet of satellites flying through Earth's magnetic field measures its interaction with the Sun's and puts a theory about their reconnection to the test.
Posted inResearch Spotlights
Sun's Magnetic Field Impacts Earth's Thunderstorms
Lightning strikes are more frequent when Earth encounters a polarity switch in the solar magnetic field.
Posted inResearch Spotlights
Electric "Tornadoes" in Space Drive Disturbances Down to Earth
New simulations show how shocks in space can trigger vortexes in Earth's magnetic field, causing magnetic disturbances that are detectable from the ground.