Sun Launches Its Strongest Solar Flare of the Year So Far, Causing Radio Blackouts Around the World
Sun Launches Its Strongest Solar Flare of the Year So Far, Causing Radio Blackouts Around the World
The new sunspot responsible for this powerful blast is rotating into view, which could bring more solar activity—and potential aurora-causing coronal mass ejections—to Earth in the coming days
The sun launched a powerful solar flare on May 14, 2025, captured here by NASA’s Solar Dynamics Observatory.
NASA / SDO
The sun has had quite a busy week hurling solar flares at our planet, causing blackouts across the globe.
“After weeks of calm, solar activity is suddenly high again,” reports Spaceweather.com. This is not totally unexpected, as scientists announced in the fall that the sun has reached the peak of its natural, 11-year cycle of activity, a high level known as the solar maximum. During this phase, the sun has more sunspots—dark, cool regions with tangled-up magnetic fields that can erupt material out into space.
The recent flares came from a pair of sunspots, including a new one that emerged earlier this week. Called AR4087, the spot is not completely aligned with Earth, but it’s currently turning toward our planet. “If the explosions continue for a few more days, however, Earth will find itself squarely in the strike zone,” with the potential for aurora-causing coronal mass ejectionsto arrive, writes Spaceweather.com.
Solar flares are bursts on the sun’s surface that send electromagnetic radiation, including X-rays and extreme ultraviolet radiation, hurtling through space—and sometimes, they’re pointed at Earth. These forms of energy can ionize, or charge, low layers of the planet’s ionosphere on the sun-facing side. That can affect high frequency radio waves used for long-distance communication, because they bounce off the ionosphere’s upper layers to get around the globe. When the lower layers are ionized, however, these waves lose energy or become completely absorbed, causing radio blackouts.
A solar flare’s intensity is classified as either A, B, C, M or X, with X being the most powerful and each letter representing an increase in strength by a factor of ten. Radio blackout intensities are ranked on a scale from R1 to R5, with R1 corresponding to an M1 flare and R5 corresponding to X20, according to the National Oceanic and Atmospheric Administration.
On Tuesday, a sunspot named AR4086 shot out an X1.2 solar flare. The very next day, the new sunspot AR4087 followed up with an M5.3 flare before a significantly stronger X2.7 flare—then topped it all off with another M7.7 flare, as reported by Live Science’s Jess Thomson. The AR4087 explosion caused “strong” R3 radio blackouts in Europe, Asia and the Middle East, per Space.com’s Daisy Dobrijevic.Specifically, the X2.7 flare—the strongest so far this year—took place while the sun was over the Middle East and interrupted high frequency radio signals in the area for around ten minutes, explains Shawn Dahl, a space weather forecaster at NOAA’s Space Weather Prediction Center, to NBC News’ Denise Chow.
“Other than the likelihood ofcommunication degradation due to some shortwave fade issues, we are unaware of any other likely or possible impacts,” Dahl says in a written statement to NBC News.
However, as sunspot AR4087 rotates to face Earth head-on, we might be in for more solar activity. The powerful X2.7 flare also came with a CME, a burst of plasma and magnetic fields that can supercharge auroras. But rather than being pointed at Earth, that CME was launched at Mars, and it could cause auroras on the red planet this Sunday, per Live Science.
“This is getting intense, especially as this active region turns closer into view,” Vincent Ledvina, an aurora chaser and photographer in Alaska, wrote in a social media post on Wednesday. “What does this AR have planned over the next days… we’ll have to wait and see.”
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Sun Launches Its Strongest Solar Flare of the Year So Far, Causing Radio Blackouts Around the World
Sun Launches Its Strongest Solar Flare of the Year So Far, Causing Radio Blackouts Around the World
The new sunspot responsible for this powerful blast is rotating into view, which could bring more solar activity—and potential aurora-causing coronal mass ejections—to Earth in the coming days
The sun launched a powerful solar flare on May 14, 2025, captured here by NASA’s Solar Dynamics Observatory.
NASA / SDO
The sun has had quite a busy week hurling solar flares at our planet, causing blackouts across the globe.
“After weeks of calm, solar activity is suddenly high again,” reports Spaceweather.com. This is not totally unexpected, as scientists announced in the fall that the sun has reached the peak of its natural, 11-year cycle of activity, a high level known as the solar maximum. During this phase, the sun has more sunspots—dark, cool regions with tangled-up magnetic fields that can erupt material out into space.
The recent flares came from a pair of sunspots, including a new one that emerged earlier this week. Called AR4087, the spot is not completely aligned with Earth, but it’s currently turning toward our planet. “If the explosions continue for a few more days, however, Earth will find itself squarely in the strike zone,” with the potential for aurora-causing coronal mass ejectionsto arrive, writes Spaceweather.com.
Solar flares are bursts on the sun’s surface that send electromagnetic radiation, including X-rays and extreme ultraviolet radiation, hurtling through space—and sometimes, they’re pointed at Earth. These forms of energy can ionize, or charge, low layers of the planet’s ionosphere on the sun-facing side. That can affect high frequency radio waves used for long-distance communication, because they bounce off the ionosphere’s upper layers to get around the globe. When the lower layers are ionized, however, these waves lose energy or become completely absorbed, causing radio blackouts.
A solar flare’s intensity is classified as either A, B, C, M or X, with X being the most powerful and each letter representing an increase in strength by a factor of ten. Radio blackout intensities are ranked on a scale from R1 to R5, with R1 corresponding to an M1 flare and R5 corresponding to X20, according to the National Oceanic and Atmospheric Administration.
On Tuesday, a sunspot named AR4086 shot out an X1.2 solar flare. The very next day, the new sunspot AR4087 followed up with an M5.3 flare before a significantly stronger X2.7 flare—then topped it all off with another M7.7 flare, as reported by Live Science’s Jess Thomson. The AR4087 explosion caused “strong” R3 radio blackouts in Europe, Asia and the Middle East, per Space.com’s Daisy Dobrijevic.Specifically, the X2.7 flare—the strongest so far this year—took place while the sun was over the Middle East and interrupted high frequency radio signals in the area for around ten minutes, explains Shawn Dahl, a space weather forecaster at NOAA’s Space Weather Prediction Center, to NBC News’ Denise Chow.
“Other than the likelihood ofcommunication degradation due to some shortwave fade issues, we are unaware of any other likely or possible impacts,” Dahl says in a written statement to NBC News.
However, as sunspot AR4087 rotates to face Earth head-on, we might be in for more solar activity. The powerful X2.7 flare also came with a CME, a burst of plasma and magnetic fields that can supercharge auroras. But rather than being pointed at Earth, that CME was launched at Mars, and it could cause auroras on the red planet this Sunday, per Live Science.
“This is getting intense, especially as this active region turns closer into view,” Vincent Ledvina, an aurora chaser and photographer in Alaska, wrote in a social media post on Wednesday. “What does this AR have planned over the next days… we’ll have to wait and see.”
Get the latest stories in your inbox every weekday.
#sun #launches #its #strongest #solar
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