PHOENIX (AZFamily) — Dancing colors in the night sky may be visible to Arizonans again on Thursday night, if you get far away from city lights and have a clear view of the horizon.

This will mark the second time this week parts of the aurora have been documented this far south.

NOAA’s Space Prediction Center has issued a severe geomagnetic storm watch for Thursday and Friday due to unusually high solar activity from the surface of the Sun.

NOAA scientists observed a fast, coronal mass ejection (CME) erupting from the surface of the sun on Oct. 8, and is predicted to slam into the Earth’s atmosphere Thursday through Friday.

The center has predicted the storm to be a G4 in intensity, one of the highest levels of concern for possible interruption of high-frequency communications passing through the Earth’s atmosphere.

Geomagnetic storms are measured from G1 (minor) to G5 (extreme). The scale is based on powers of 10, meaning a G2 storm is 10 times stronger than a G1 storm and so on.

Early this week, viewers posted fantastic shots of the Aurora Borealis and parts of the SAR arc on our Arizona’s Family First Alert Facebook page .

Some of the best shots are taken by people using their cellphones to capture long-exposure photos if you can’t see them with your naked eye.

Again, the key to seeing this sky show is to get away from city lights, try to find an elevated, clear area and look north, low on the horizon.

Peak viewing should be from 10 p.m. until 2 a.m.

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