(NEXSTAR) – A strong geomagnetic storm that has been impacting Earth since Monday has prompted national forecasters to warn officials "to mitigate any possible impacts."

NOAA's Space Weather Prediction Center warned late Monday that moderate G2-level storming had been observed, brought on by the influences of coronal mass ejections, or CMEs. At the time, the agency warned moderate storming was expected to continue into Tuesday.

A short time later, the SWPC said that solar wind conditions had strengthened and strong G3-level storming was expected. Roughly half an hour later, the SWPC confirmed that the geomagnetic storm conditions had reached G3 level. (The SWPC uses a 5-point scale to measure the strength of geomagnetic storms, much like forecasters use scales for tornadoes and hurricane

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