Last week, a powerful solar flare exploded from a sun spot three times the size of our planet Earth, releasing radiation that caused a widespread radio blackout.
Classed as an M9.6 solar flare, the eruption was powerful enough to disrupt high frequency radio signals in North America, Central America, and South America, according to the National Oceanic and Atmospheric Administration (NOAA).
As Business Insider reports, there were no clear reported effects of the blackout, which lasted more than 10 minutes, though an experts say such events can interfere with air traffic. “Space weather can ground flights,” Mathew Owens, a professor of space physics at the University of Reading said, adding that the Federal Aviation Administration “won’t allow flights if they don’t have both radio and satellite communications.”
An M9 solar flare is a pretty powerful explosion, though it poses no health risk to humans. Solar flares rank from A, followed by B, C, M, and X classes. An M9 solar flare is just a rank below the most powerful class of solar flares.
The flare was caused by a large sunspot that was just out of view when the flare exploded. The eruption was only 1 percentage point from being an X-flare, and would probably have been classified as such if it had been in full view of Earth’s observation satellites. The sunspot, which has now come into view, appears to be about three times the size of the Earth, according to spaceweather.com. Experts will likely keep a close eye on the spot as it faces the Earth.
Sunspots are areas where magnetic fields are particularly strong. They are known to be associated with space weather events. This solar flare is just the latest in a series of recent notable space weather events, including spectacular auroras and rare solar occurrences like plasma waterfalls and tornados.
The sun is gearing up towards a peak of activity in its near decadal cycle, which is caused by a sudden flip in its poles. As the sun becomes more active, it is exhibiting more frequent solar events like solar flares and coronal mass ejections. An X-class solar flare was spotted in March causing radio blackouts in parts of southeast Asia, Australia, and New Zealand.
Scientists have warned that these peaks of solar activity could potentially be dangerous if powerful solar storms were to short out power grids around the globe.
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