Something strange is happening with Earth’s magnetic field tail

You may not know this, but Earth’s magnetic field has a tail. As the sun‘s solar wind buffets the planet, it leaves behind a sort of long shadow that trails out in our planet’s wake. Scientists call this magnetic tail, appropriately, the magnetotail. Typically, the magnetotail is strewn with magnetic storms.

But for the past several years, scientists have known of a mystery in the magnetotail: a missing storm. They have found a signature of a storm, but no storm to actually go along with it. NASA’s Magnetospheric Multiscale (MMS) mission is now on the case.

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