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Earth sciences

Earth sciences

Lightning sets off bursts of high-energy electrons in Earth’s inner radiation belt

07 Nov 2024 Isabelle Dumé
Map of the world showing the geographic locations of each identified bouncing packet, represented by red dots. The dots are clustered in southern Africa and southern South America, with two dots in North America.
Location of events: Geographic locations of each identified bouncing packet (red dots), with background magnetic field strength shown on the colour scale. White dashed lines are L-shell contours, which describe magnetic field lines; for example, an L-shell of 2 represents the magnetic field line that is 2 Earth radii away from the center of Earth at its magnetic equator. (Courtesy: M Feinland et al. Lightning-induced relativistic electron precipitation from the inner radiation belt. Nat Commun 15, 8721 (2024). https://doi.org/10.1038/s41467-024-53036-4)
A supposedly stable belt of radiation 7000 km above the Earth’s surface may in fact be producing d

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Isabelle Dumé is a contributing editor to Physics World
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