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Solar Storm Brings Northern Lights to U.S.

Did you see the Northern Lights displays this week? If you did, you’re not alone!

The U.S. National Oceanographic and Atmospheric Administration (NOAA) issued a Geomagnetic Storm Watch on May 4th, predicting a geomagnetic storm in the earth’s atmosphere on May 5th and 6th. According to NOAA’s Space Weather Prediction Center (SWPC), the geometric storm was the result of a recent coronal mass ejection (CME) from the sun.

NOAA’s Watch notice indicated that the geometric storm could result in the appearance of aurora light displays that would be visible over some northern and upper Midwest states in the U.S. from New York to Idaho.

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Mastering High Voltage: The Importance of Accurate Test Equipment

This whitepaper underscores that precise calibration of high-voltage test gear — especially when measuring 1 kV–150 kV systems — is essential for safety, reliability, and regulatory compliance. It details measurement techniques (voltage dividers, step-down transformers, etc.), the impact of environmental and connection factors on accuracy, and why traceable calibration (e.g. to NIST / A2LA) is a must to ensure consistent, reliable results.

According to NOAA’s SWPC, intense space weather events can cause aurora lights to appear at a greater distance from Earth’s poles than normal.

NOAA’s May 4th Geomagnetic Storm Watch notice is available at the NOAA SWPC website.

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