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Skywatchers will be hoping for clear skies from today because particles from a recent solar storm will slam into Earth and produce amazing Northern Lights, or auroras.

On the downside, experts expect radio blackouts for a few days, caused by the radiation from the flare – or coronal mass ejection (CME) – causing magnetic storms.

The flare is part of a larger increase in activity in the Sun, which runs in 11-year cycles. It is expected to peak around 2013.

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Sun Unleashes Largest Solar Flare in Years - (Read Full Story

An extremely powerful solar flare, the largest in over four years, rocked the sun early Tuesday (Aug. 9), but is unlikely to wreak any serious havoc here on Earth, scientists say.

"It was a big flare," said Joe Kunches, a space scientist with the National Oceanic and Atmospheric Administration (NOAA)'s Space Weather Prediction Center. "We lucked out because the site of the eruption at the sun was not facing the Earth, so we will probably feel no ill effects."

Today's solar flare began at 3:48 a.m. EDT (0748 GMT), and was rated a class X6.9 on the three-class scale scientists use to measure the strength of solar flares. The strongest type of solar eruption is class X, while class C represents the weakest and class M flares are medium-strength events. Sun's Wrath: Worst Solar Storms in History.

The flare is the largest one yet in the sun's current cycle, which began in 2008 and is expected to last until around 2020. Solar activity waxes and wanes over an 11-year sun weather cycle, with the star currently heading toward a solar maximum in 2013.

"This flare had a GOES X-ray magnitude of X6.9, meaning it was more than 3 times larger than the previous largest flare of this solar cycle - the X2.2 that occurred on Feb 15, 2011," scientists with NASA's Solar Dynamics Observatory, a space observatory that monitors the sun, wrote in an update. 

Before the Feb. 15 storm, the largest recent solar flare occurred in December 2006, when an X9-class solar storm erupted from the sun.

Solar storms will peak in 2013 and wreak havoc on Earth's electrical communications, top scientist warns - (Read Full Story)

Solar storms could have 'devastating effects' on human technology when they hit a peak in two years' time, a leading scientist has warned.

U.S. National Oceanic and Atmospheric Administration assistant secretary Kathryn Sullivan said the storms pose a growing threat to critical infrastructure such as satellite communications, navigation systems and electrical transmission equipment.

Solar storms release particles that can temporarily disable or permanently destroy fragile computer circuits

Dr Sullivan, a former Nasa astronaut who in 1984 became the first woman to walk in space, yesterday told a UN weather conference in Geneva that 'it is not a question of if, but really a matter of when a major solar event could hit our planet'.

Huge solar flare said to jam China communications

The strongest solar flare in four years disrupted radio communications in southern China, according to the China Meteorological Administration.

The solar flare, a huge explosion on the sun's surface caused by magnetic activity, affected transmissions in southern China on Tuesday, Xinhua news agency reported, quoting the CMA.

The US space administration NASA confirmed that Monday's solar flare was the largest in four years, and the event sparked predictions of heightened activity on the northern hemisphere of the sun.

Earth could have two suns for a short time

Earth could be getting a second sun, at least temporarily.

Dr. Brad Carter, Senior Lecturer of Physics at the University of Southern Queensland, outlined the scenario to news.com.au. Betelgeuse, one of the night sky's brightest stars, is losing mass, indicating it is collapsing. It could run out of fuel and go super-nova at any time.

When that happens, for at least a few weeks, we'd see a second sun, Carter says. There may also be no night during that timeframe.

Strange Claim: The Sun Rose 2 Days Early in Greenland

Residents of a town on the western coast of Greenland may have seen the sun peek over the horizon 48 hours earlier than its usual arrival on Jan. 13, sparking speculation, and disagreements, over possible causes.

The town of Ilulissat sits just above the Arctic Circle, meaning its residents had been without any sunlight for a good chunk of the winter, and traditionally they'd expect to see their "first sunrise" on Jan. 13.

U.S. warned of threat worse than Katrina, plague, WWII

Her 410 days of solitary confinement in an Iranian prison were mostly cramped quarters and endless monotony, but Sarah Shourd chooses to savor the few moments of joy: a proposal from her boyfriend and a birthday celebration complete with a chocolate cake.

Shourd, her boyfriend Shane Bauer and their friend Josh Fattal were captured in 2009 while hiking near the Iran-Iraq border. Shourd talked about her experiences Thursday with The Associated Press in one of her first interviews since her release on Sept. 14 after officials in Oman mediated bail.

Sun Eruption That May Have Spawned Zombie Satellite Identified

Scientists have identified a massive eruption from the sun in April that reached all the way to Earth and may be responsible for knocking out a satellite, creating a so-called "zombie satellite."

The huge explosion of plasma and magnetic energy, called as a coronal mass ejection (CME), occurred on April 3 and was observed by NASA's sun-watching STEREO spacecraft, according to the U.S. Naval Research Laboratory (NRL). The laboratory released new images of the solar storm last week...