A powerful geomagnetic storm, the strongest in over two decades, struck Earth on Friday, causing disruptions such as radio blackouts and extending the northern lights as far south as the United States.

As of Monday, officials cautioned that the storm’s effects were ongoing. NOAA’s Space Weather Prediction Center issued a G3 geomagnetic storm warning until 2 a.m. ET, with expectations of gradually diminishing conditions throughout the day.

However, moderate to strong geomagnetic storms were deemed likely for Monday, with minor storms anticipated for Tuesday.

Solar activity, including the possibility of additional solar flares, was forecasted to remain high.

Another X-class solar flare, though moderate in strength, was detected, potentially affecting high-frequency radio signals.

The source of these flares, Sunspot Region 3664, remained highly active and complex, contributing to the weekend’s intense geomagnetic storm, CBS News reported.

The region, visible even with eclipse glasses, was described as “magnetically complex and much larger than Earth.”

Geomagnetic disturbances, fueled by coronal mass ejections (CMEs), were expected to persist, albeit weakening by May 14th.

Minor solar radiation storms and radio blackouts were also projected, with the severity depending on the intensity of solar flares.

Written by B.C. Begley