According to NOAA Space Weather forecasters, a powerful G3-class geomagnetic storm is in progress on August 26th as Earth passes through the wake of a coronal mass ejection (CME) that arrived with little notice approximately 24 hours ago. Strong magnetic fields in the CME's wake have cracked into Earth's magnetosphere, allowing solar wind to enter. So far auroras have been sighted in Scandinavia, Canada, and northern-tier US states such as Michigan and New York.

"The geomagnetic field is expected to be at active to G3 (Strong) geomagnetic storm levels on day one (26 Aug) due to continued influence from the 20 Aug CME. Quiet to active conditions, with a slight chance for G1 (Minor) storm conditions, are likely on day two (27 Aug) with quiet to unsettled levels likely on day three (28 Aug) as CME effects gradually wane," said the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.

Steven Herman, the White House bureau chief of Voice of America (VOA News), reported the strong geomagnetic storm on earlier Sunday morning. He shared a note listing the potential impacts of the storm, which included power systems, spacecraft, satellite communication networks, and even radio disruptions.

The K-index, a chart that measures the earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm, hit the 4 threshold was reached at 21:43 UTC on August 25, followed by K-index of 5 (G1 Minor) at 01:54 UTC on August 26, K-index of 6 (G2 Moderate) at 02:57 and K-index of 7 (G3 Strong) at 05:59 and 07:38 UTC.