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Auroras form when high-energy particles from the sun collide with the Earth’s atmosphere. These particles excite the gases in the sky and cause them to glow, similar to how neon lights work. Auroras are one of the few ways we can see space weather from the ground, and while they’re usually confined to the poles, enough excitement from the sun can create auroras much farther away.

But before the CMEs get here tomorrow, a coronal hole high-speed stream is expected to arrive tonight and drive a G1, or “minor,” geomagnetic storm. A coronal hole is a cooler area in the sun’s corona that can generate high-speed solar wind full of charged particles and spread them out across the solar system. Coronal hole high-speed streams can also generate auroras on Earth.

NEW: The Solar Ultraviolet Imager (#SUVI) on @NOAA’s #GOES16 ️ captured several eruptions from the Sun on August 15 and 16, 2022. Get the latest from NOAA @NWSSWPC. https://t.co/moYyW3wrHA pic.twitter.com/SkLRVBpYa6

— NOAA Satellites - Public Affairs (@NOAASatellitePA) August 16, 2022

Forecasters expect G2 or “moderate” storm activity to persist on August 19.

The NOAA warns that geomagnetic storms can be disruptive if they become severe. “Geomagnetic storms can impact infrastructure in near-Earth orbit and on the surface, potentially disrupting communications, the electric power grid, navigation, radio, and satellite operations,” according to an NOAA press release.

The upcoming storms are not expected to cause much technical trouble. Even so, it might be a good opportunity to put all your electronics away for a few hours and look toward the stars. You might just see the sky light up.

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