The sun burps out a flare in a stellar new photo – Space.com
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By Elizabeth Howell published 21 April 22
Our solar neighbor has been zinging out bursts like this all week.
The sun is a beehive of flaring activity in a stunning new photo from a NASA spacecraft.
NASA’s Solar Dynamics Observatory caught the sun in action as it flung a moderate-sized flare into space on Wednesday (April 20). The flare was just one of dozens of plasma projectiles that the sun generated in just a few hours.
This particular flare peaked Wednesday at 9:59 p.m. EDT (1359 GMT Thursday, April 21), NASA officials said in a release. The agency did not provide a specific forecast associated with the event, but it did state that “solar flares are powerful bursts of energy. Flares and solar eruptions can impact radio communications, electric power grids, navigation signals, and pose risks to spacecraft and astronauts.”
While NASA did not share a forecast associated with the event, the National Oceanic and Atmospheric Administration advised that there is a moderate probability of auroras in the next 24 hours.
Related: Earth braces for solar storm, potential aurora displays
This latest missive came after the sun sent out dozens of flares within a few hours, including the most powerful class of solar flare, X-class. The biggest flares came from sunspot AR2992, which is on the edge of the sun. Since Earth wasn’t quite within firing range, it appears there is no incoming set of auroras associated with that sunspot’s outburst.
Auroras can occur after a solar flare when the charged particles from coronal mass ejections reach Earth and flow across our planet’s magnetic field lines. As the particles hit bits of Earth’s atmosphere high above us, the atmospheric molecules get “excited” and begin to glow. Forecasts Wednesday (April 20) suggested a CME was brewing, but was likely not to strike Earth given the sunspot was facing in a direction mostly away from our planet.
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The flaring sun and huge groups of sunspots on its surface show that the sun is starting to emerge from the quieter beginning of the solar cycle, which began in 2019. The 11-year cycle should peak in 2025.
Most CMEs are harmless, aside from the sky shows and brief radio blackouts. But NASA and other agencies do keep a sharp eye on the sun in case of larger events. The most powerful storms, albeit rare, can create issues with infrastructure such as satellites or power lines.
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Elizabeth Howell, Ph.D., is a contributing writer for Space.com since 2012. As a proud Trekkie and Canadian, she tackles topics like spaceflight, diversity, science fiction, astronomy and gaming to help others explore the universe. Elizabeth’s on-site reporting includes two human spaceflight launches from Kazakhstan, and embedded reporting from a simulated Mars mission in Utah. She holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, and a Bachelor of Journalism from Canada’s Carleton University. Her latest book, NASA Leadership Moments, is co-written with astronaut Dave Williams. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday.
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May 12, 2022 at 07:23PM