The Mercury News

Northern lights could be visible in parts of U.S.

- By Paul P. Murphy

A large solar flare erupted Thursday and is set to reach Earth today, which could result in a strong geomagneti­c storm and cause the aurora borealis, or northern lights, to be visible across the U.S. and Europe.

The National Oceanic and Atmospheri­c Administra­tion issued a G3, or “strong” geomagneti­c storm watch, for today and Sunday ahead of the flare slamming into the Earth. The scale for geomagneti­c storms runs from G1, or minor storm, to G5, an extreme storm.

This geomagneti­c storm could cause voltage irregulari­ties and false alarms on some protection devices, NOAA warns. It also could cause high frequency radio blackouts and loss of radio contact on the sunlit side of the Earth.

The most visible effect from the impending geomagneti­c storm is it will likely supercharg­e the aurora borealis, making it visible across large parts of the U.S. and Europe.

The University of Alaska Fairbanks Geophysica­l Institute Aurora Forecast indicates, weather permitting, the northern lights could be visible from Portland, Oregon, to New York City. It may also be visible on the horizon as far south as Carson City, Nevada; Oklahoma City; and Raleigh, North Carolina.

In Europe, the forecast shows, weather permitting, the aurora borealis may be visible overhead from across Norway, Sweden and Finland, and even as far south as Scotland and St. Petersburg, Russia. It may be visible on the horizon as far south as Dublin, Ireland, and Hamburg, Germany.

The aurora australis, or the southern lights, will see similar effects. The forecast shows from Melbourne, Australia, to Christchur­ch, New Zealand, it may be visible on the horizon.

 ?? OLIVIER MORIN — AFP/GETTY IMAGES ?? A person watches the northern lights in 2018 in Utakleiv in the Lofoten islands of northern Norway within the Arctic Circle.
OLIVIER MORIN — AFP/GETTY IMAGES A person watches the northern lights in 2018 in Utakleiv in the Lofoten islands of northern Norway within the Arctic Circle.

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