Largest Solar Storm Since 2005 to Hit Earth Tuesday

By John Matson | Scientific American

Last night the sun unleashed a flash of radiation called a solar flare, along with a generous belch of ionized matter that is now racing toward Earth at thousands of kilometers a second. The solar storm front from the ionized blast, called a coronal mass ejection (CME), should arrive tomorrow morning, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC). The forecasters called the event the strongest solar storm since 2005.

When a solar storm hits Earth, the impact can have a number of consequences, especially in Earth orbit and at high latitudes, where the planet’s geomagnetic shielding is thin. Solar storms can knock out satellites, cause blackouts, and force aircraft to avoid polar routes. Storms can also bring the aurora borealis, a.k.a. the northern lights, down to unusually low latitudes. (You can see a slideshow of recent low-latitude auroras here.)

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