NASA confirms two major solar flares on sun, which can cause blackouts on Earth

CTV News

21-05-2025

NASA's Solar Dynamics Observatory captured this image of a solar flare — seen as the bright flash on the left – on May 14. The image shows a subset of extreme ultraviolet light that highlights the extremely hot material in flares and which is colorized in red. (NASA/SDO)
NASA confirmed two solar flares erupting on the surface of the sun last week, an event that they say can impact radio communications, electric power grids, navigation signals and pose risks to spacecrafts and astronauts in the orbit.
The first flare occurred May 13 at 11:38 a.m. EDT, and was recorded by NASA's Solar Dynamics Observatory. Classified as an X1.2 flare, NASA says the 'X-class denotes the most intense flares.'
The second solar flare, peaking at 4:25 a.m. EDT on May 14, was also recorded by the Solar Dynamics Observatory. This flare was classified as an X2.7 flare.
The flares occurred on sunspot AR4087, an extremely active region on the sun.
Space photographer Vincent Ledvina, who studies space physics at the University of Alaska-Fairbanks, reacted with a 'wow' when studying the flare ups.
'This is getting intense, especially as this active region turns closer into view,' Ledvina said on social media.
What are 'solar storms'?
A solar storm is a sudden explosion of particles, energy, magnetic fields and material blasted into the solar system by the sun, NASA explains.
A solar storm is caused due to a 'tangled mess of magnetic fields' created by the sun. According to NASA, these magnetic fields get twisted up as the sun rotates – with its equator rotating faster than its poles.
'Solar storms typically begin when these twisted magnetic fields on the sun get contorted and stretched so much that they snap and reconnect (in a process called magnetic reconnection), releasing large amounts of energy,' the space agency said.
A solar storm can create major disturbances in the Earth's magnetic field, called a geomagnetic storm, the space agency's website reads. This storm can cause radio blackouts, power outages and beautiful auroras brought on by coronal mass ejections (CME), which occurs when charged solar particles pass through the Earth's atmosphere.
What are 'solar flares'?
A solar flare is an intense burst of radiation or light on the sun, according to the space agency.
'These flashes span the electromagnetic spectrum – including X-rays, gamma rays, radio waves and ultraviolet and visible light,' NASA said.
Solar flares are the most powerful explosions in the solar system — the biggest ones can have as much energy as 'a billion hydrogen bombs,' according to NASA.
Solar flares are classified as A, B, C, M and X – with X being the strongest flare and A being the weakest.
'The energy from a flare travels at the speed of light, which means it reaches Earth about eight minutes after a flare happens,' NASA said. 'Essentially, by the time we see a flare, most of its effects are here.'
Solar flare
Material rises from the edge of the sun, as seen in extreme ultraviolet light by NASA's Solar Dynamics Observatory. (NASA/SDO)
However, the harmful radiation from a flare does not affect us on the ground since we are shielded by Earth's atmosphere and magnetic field. But a strong flare can disrupt communications that pass through the upper atmosphere and affect satellites and other spacecrafts.
'There are five sunspot regions on the Earth-facing disc, however these are mostly small, simple and with little sign of growth,' the Met Office said in its latest space weather forecast. 'The most notable is in the north-centre, however this is overall much simpler and less active than a few days ago.'
Another strong solar flare was recorded previously by NASA's Solar Dynamics Observatory, peaking at 11:38 a.m. EDT on May 13. This flare is classified as an X1.2 flare, NASA says.
The most powerful flare ever measured was recorded in 2003 as an X28, before NASA's sensors were overwhelmed by it.
CTV News previously wrote that NASA had warned of potential blackouts on Earth due to these specific solar flares. However, NASA has said that solar flares can cause blackouts on Earth.