Aurora alert: Possible geomagnetic storm could bring northern lights as far south as New York (2024)

Aurora alert: Possible geomagnetic storm could bring northern lights as far south as New York (1)

Heightened solar activity has prompted the National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center to issue a geomagnetic storm watch for July 24.

The culprit? A plume of plasma and magnetic field known as a coronal mass ejection (CME) that was released from the sun on Jul 21 and is now barreling toward Earth and due to arrive on July 24.

Recent predictions anticipate the arrival window in the early hours of July 24, but there is a level of uncertainty about the exact timings. "Likely the storm will be fashionably late, due to slow solar wind "traffic" & an additional glancing storm blow ahead of it," space weather physicist Tamitha Skov wrote in a post on X.

CMEs carry with them electrically charged atoms known as ions, when CMEs collide with Earth's magnetosphere they can trigger geomagnetic storms. During geomagnetic storms the ions collide with gases in Earth's atmosphere and release energy in the form of light, we recognize this as the northern lights or aurora borealis in the Northern Hemisphere or the southern lights, or aurora australis in the Southern Hemisphere.

Geomagnetic storms are classified by NOAA using a G-scale to measure the intensity of geomagnetic storms. They range from G5, the most extreme class to G1 minor class storms. The recent geomagnetic storm watch issued by NOAA is currently classified as a G2-class.

Like weather on Earth, space weather is a fickle creature and difficult to predict. Geomagnetic storm warnings like this are not uncommon and in some cases, they fizzle to nothing. As we get closer to July 24 space weather forecasters will gain a better idea of when (if at all) to expect the CME to arrive.

Aurora alert: Possible geomagnetic storm could bring northern lights as far south as New York (2)

Though aurora chasers will be willing on the arrival of the CME and have everything crossed for a direct hit, this isn't a sentiment shared by all.

CMEs can wreak havoc on our technological world and pose a threat to both satellites and astronauts in

low Earth orbit

. On Earth, CMEs can cause surges in electrical currents which can overload power grids, causing blackouts. They can also jostle Earth's

magnetic field

and disrupt radio transmissions and increase radio static in Earth's ionosphere.

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In space, high-energy particles from the CME can damage satellites in low-Earth orbit. CMEs can also cause Earth's atmosphere to warm and expand, as it does it creates a thicker medium through which a satellite must travel, the additional drag can slow a satellite's momentum and lead to a lowering of its orbit.

Astronauts also receive a higher dose of radiation during a CME event compared to if they were on Earth, though they are still mostly protected by the magnetosphere and shielded by the structure of the spacecraft.

For the latest space weather alerts and forecast check out NOAA's Space Weather Prediction Center.

This article was updated on July 23 to include the recent prediction of the CME arrival window and the quote from Tamitha Skov's post on X.

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: community@space.com.

Aurora alert: Possible geomagnetic storm could bring northern lights as far south as New York (3)

Daisy Dobrijevic

Reference Editor

Daisy Dobrijevic joined Space.com in February 2022 having previously worked for our sister publication All About Space magazine as a staff writer. Before joining us, Daisy completed an editorial internship with the BBC Sky at Night Magazine and worked at the National Space Centre in Leicester, U.K., where she enjoyed communicating space science to the public. In 2021, Daisy completed a PhD in plant physiology and also holds a Master's in Environmental Science, she is currently based in Nottingham, U.K. Daisy is passionate about all things space, with a penchant for solar activity and space weather. She has a strong interest in astrotourism and loves nothing more than a good northern lights chase!

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    Aurora alert: Possible geomagnetic storm could bring northern lights as far south as New York (2024)

    FAQs

    Could a possible geomagnetic storm bring Northern Lights as far south as New York? ›

    While auroras are best seen in the polar regions, including Alaska and northern Canada, stronger solar events can produce Northern Lights farther south. Because of Tuesday's solar storm, space weather forecasters say the Northern Lights could be visible in the northern U.S. from New York to Idaho.

    Can aurora borealis be seen from New York? ›

    Can you see the northern lights in NYC? These lights are usually only seen near the Earth's poles, but during more intense solar storms, they can be seen in the Tri-State area and even further south, like the last geomagnetic storm in NYC.

    How far south will Northern Lights be visible? ›

    Although it's difficult for astronomers to pinpoint where the Northern Lights will be visible, they may be visible as far south as New York, Washington and Wisconsin, according to the NOAA's alert. Other states within the view line include Montana, North Dakota, Minnesota, Michigan and Maine.

    Can Northern Lights solar storms affect your health? ›

    Individuals have reported experiencing health problems from this type of solar activity, and researchers have suggested solar flares might be able to affect human health. However, health issues like headaches or mood changes are unlikely following a solar flare event; more research is needed.

    How does a geomagnetic storm affect humans? ›

    It should be noted, that during strong geomagnetic disturbances, the tolerance to mental and physical stresses is decreased; there appears a danger of disorders for the people whose professional work is connected to high-level responsibility, like surgeons, dispatchers, drivers, pilots, etc.

    Why are northern lights moving south? ›

    The reason for that is an impending solar maximum. During the solar cycle, which is roughly 11 years according to NOAA, the sun emits energy that reached peaks and minimums in intensity.

    What is the furthest south the northern lights have been seen? ›

    Historians think the furthest south the northern lights have ever been seen is in Honolulu, Hawaii. That is only 21 degrees north of the equator! This aurora was seen during the great solar storm of 1859. The southern lights may have been seen as far north as Singapore, eight degrees south of the equator.

    What time are the northern lights on May 11 2024? ›

    The Aurora borealis, visible from Joshua Tree National Park, from Friday, May 10 to Saturday, May 11, 2024. "At the aurora's peak around 11:30 p.m. and again at 1:30 a.m., the sky was noticeably red, and streaks of lights could be seen without the assistance of a camera.

    Are there southern lights if there are northern lights? ›

    The closer you are to the North or South Pole, the greater your chances are of seeing this amazing spectacle. In the Northern Hemisphere, it is called an aurora borealis or the northern lights. In the Southern Hemisphere, it is called an aurora australis or the southern lights.

    Will a solar storm hit Earth in 2024? ›

    More powerful solar storms can be expected in the coming months as the peak of the current solar cycle — the 11-year ebb and flow in the number of sunspots, solar flares and eruptions — is expected in late 2024 and early 2025. The paper was accepted for publication in the journal of Spacecraft and Rockets.

    Will a solar flare hit Earth in 2025? ›

    With the current period of high activity, scientists predict “at least a few more G4 events between now and 2025,” Bettwy said. But the elevated risk of solar storms could last into 2026, because some evidence suggests CMEs may become more common on the back side of the peak in solar activity.

    Does the aurora borealis affect the human body? ›

    Perhaps less well-known are the impacts such solar events have on human health. But periods of intense solar activity can disrupt the body's circadian rhythm, nervous system, heart rate and blood pressure — even if they're not visible to the human eye in the form of an aurora, researchers say.

    Do magnetic storms cause Northern Lights? ›

    Auroras are brilliant ribbons of light weaving across Earth's northern or southern polar regions. These natural light shows are caused by magnetic storms that have been triggered by solar activity, such as solar flares (explosions on the Sun) or coronal mass ejections (ejected gas bubbles).

    Have the northern lights ever been seen in southern California? ›

    “Last night absolutely felt like a dream,” Coyne shared on his Instagram. “We had the privilege of seeing the Northern lights here in Southern California! The geomagnetic storm had a KP index of 8 which is why we got to see it all the way down here at Mountain High.

    How far south could the northern auroras be seen when the coronal mass ejection hit Earth in 1859? ›

    The Carrington Event of 1859

    An intense white light flare was erupted by the Sun, which was followed by a massive coronal mass ejection, or charged particles, that reached Earth in about 17 hours. The geomagnetic storm caused spectacular auroras visible as far south as the Caribbean.

    References

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