Science, Space and Technology News 2024
University of Alaska Fairbanks researchers discovered a new “whistler” wave that carries lightning energy from the ionosphere to the magnetosphere, enhancing our understanding of how lightning influences the radiation belts surrounding Earth.
It was previously believed, the authors write, that lightning energy entering the ionosphere at low latitudes remained trapped in the ionosphere and therefore was not reaching the radiation belts. The belts are two layers of charged particles surrounding the planet and held in place by Earth’s magnetic field.“We as a society are dependent on space technology,” Sonwalkar said.
This graphic shows a cutaway model of Earth’s radiation belts with the two Van Allen Probes satellites flying through them. Credit: NASA illustration Earth’s magnetosphere is a region of space surrounding the planet and created by Earth’s magnetic field. It provides a protective barrier that prevents most of the solar wind’s particles from reaching the atmosphere and harming life and technology.
A review of plasma wave data from the Van Allen Probes showed that specularly reflected whistlers are a common magnetospheric phenomenon.
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