The sun unleashed a major solar flare on Saturday (March 29), causing a radio blackout for several minutes on Earth, space weather experts say.
The brief X1-class flare erupted from the now decaying sunspot AR2017 at 1:48 p.m. EDT (1748 GMT) on Saturday, according to a report from the NOAA-led Space Weather Prediction Center. Although AR2017 is dissipating, it may still produce more solar flares in the coming days, the report stated. NASA's Solar Dynamics Observatory caught sight of the solar blast, capturing video of the huge solar flare.
"Solar flares are powerful bursts of radiation," Karen Fox of NASA's Goddard Space Flight Center wrote in a statement. "Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however — when intense enough — they can disturb the atmosphere in the layer where GPS and communications signals travel." [Biggest Solar Flares of 2014: Sun Storm Photos]
According to NOAA's update, the weekend solar flare and several recent eruptions of super-hot solar plasma (called a coronal mass ejections) could trigger a minor geomagnetic storm on April 2. The storm may amplify Earth's northern lights displays, astronomer Tony Phillips wrote on Spaceweather.com. The northern and southern lights are created when charged particles from the sun come into contact with particles in Earth's atmosphere. The particles from the sun are drawn to the Earth's poles by the planet's magnetic field, creating the dancing lights in northern and southern latitudes.
While the flare did black out terrestrial radio signals, it also produced radio signals, Phillips said.
"The explosion above sunspot AR2017 sent shock waves racing through the sun's atmosphere at speeds as high as 4800 km/s (11 million mph)," Phillips wrote. "Radio emissions stimulated by those shocks crossed the 93 million mile divide to Earth, causing shortwave radio receivers to roar with static."
The flare also produced what Phillips calls a "magnetic crochet," a rippling in Earth's magnetic field that occurs during the flare. The effects of a CME are usually only felt a few days after the flare, when the plasma has time to reach Earth and disrupt its magnetic field. A magnetic crochet, on the other hand, appears during the flare.
When pointed directly at Earth, powerful solar flares can pose a threat to astronauts, satellites and other spacecraft in orbit.
The sun is in an active phase of its 11-year solar cycle. The star shot off an X-class flare at the beginning of January and another powerful X-class solar flare in February.
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Severe thunderstorms spawned damaging tornadoes in parts of the Southeast on Monday night in one of the biggest severe weather outbreaks of the early season.
Tropical Cyclone Eliakim has claimed the lives of at least 17 people in Madagascar as the storm produced flooding and mudslides.
A second round of cold air from the “Beast from the East” sent temperatures tumbling below freezing across much of Germany over the weekend and little relief is expected through midweek.
Residents from Florida to coastal areas of Georgia and South Carolina should be on alert for severe weather on Tuesday.
Severe thunderstorms will threaten lives and property in portions of the southeastern United States into Tuesday in one of the first severe weather outbreaks of the year.
Over the first half of March, three separate and powerful nor’easters rattled the mid-Atlantic and Northeast and that number could increase to four later this week.
Another major storm will spread wet snow and travel disruptions from parts of Kentucky and Ohio to coastal New Hampshire and Maine as spring begins.