SCIENCE & TECHNOLOGY

Strong solar storm could disrupt communications and produce northern lights in US

May 10, 2024, 10:21 AM | Updated: 12:54 pm

This image provided by NASA shows a solar flare, as seen in the bright flash in the lower right,  c...

This image provided by NASA shows a solar flare, as seen in the bright flash in the lower right, captured by NASA’s Solar Dynamics Observatory on May 9, 2024. A severe geomagnetic storm watch has been issued for Earth starting Friday and lasting all weekend _ the first in nearly 20 years. (NASA/SDO via AP)

(NASA/SDO via AP)

CAPE CANAVERAL, Fla. (AP) — An unusually strong solar storm headed toward Earth could produce northern lights in the U.S. this weekend and potentially disrupt power and communications.

The National Oceanic and Atmospheric Administration issued a rare geomagnetic storm watch — the first in nearly 20 years. That was expected to become a warning Friday night, when the effects of the solar outburst were due to reach Earth.

NOAA already has alerted operators of power plants and spacecraft in orbit to take precautions.

“As far as the worst situation expected here at Earth, that’s tough to say and I wouldn’t want to speculate on that,” said NOAA space weather forecaster Shawn Dahl. “However, severe level is pretty extraordinary, It’s a very rare event to happen.”

NOAA said the sun produced strong solar flares beginning Wednesday, resulting in five outbursts of plasma capable of disrupting satellites in orbit and power grids here on Earth. Each eruption — known as a coronal mass ejection — can contain billions of tons of plasma and magnetic field from the sun’s outer atmosphere, or corona.

The flares seem to be associated with a sunspot that’s 16 times the diameter of Earth, according to NOAA. An extreme geomagnetic storm in 2003 took out power in Sweden and damaged power transformers in South Africa.

The latest storm could produce northern lights as far south in the U.S. as Alabama and Northern California, according to NOAA. Northern Utah close to the Idaho border has the best chance to see the lights — and avoid cloud cover.

PHOTOS: Northern lights shine across parts of Utah

The most intense solar storm in recorded history, in 1859, prompted auroras in central America and possibly even Hawaii. “That’s an extreme-level event,” Dahl said. “We are not anticipating that” but it could come close.

___

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Science and Educational Media Group. The AP is solely responsible for all content.

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Strong solar storm could disrupt communications and produce northern lights in US