Auroras tonight, and Wednesday?

Looks like it. This was Iowa from the early morning hours today:



Look up! Another solar storm may supercharge auroras Wednesday

While a "severe" solar storm that sparked dazzling auroras around the world on Monday through Tuesday morning is dying down now, skywatchers shouldn't stop looking up quite yet.

Another potentially powerful solar tempest is expected to impact Earth on Wednesday into Thursday, and it could create more amazing auroras for people in the Northern and Southern Hemispheres.

In particular, the next solar storm is especially well aimed to enhancing aurora activity over North America, according to experts at the National Space Weather Prediction Center (SWPC) in Boulder, Colorado.

Monday's solar storm hit the G4 or "severe" level, a relatively rare class of storm that can create bright auroras in relatively low latitudes. Such G4 storms — the rating scale goes up to G5 — can also cause problems with power grids on Earth and harm satellites in space.

And another storm of that severe magnitude is likely on its way to Earth now.

Scientists at the SWPC are anticipating that the solar storm predicted to arrive Wednesday could, yet again, produce beautiful auroras in relatively low latitudes.

At the moment, the SWPC is predicting a G3 or "strong" storm on Wednesday and Thursday, but that was the forecast for Monday, as well. [...]

See the whole article for embedded links, photos, videos and more.

For more technical details, and an Aurora Prediction map, see the NOAA website: http://www.swpc.noaa.gov/

   

Solar Activity, Double Flare

2 major solar flares Friday -- the second twice as intense as the first

The sun shot out a pair of gigantic solar flares early Friday -- the second one even bigger than the first, a NOAA expert tells the Los Angeles Times.

An X1-class solar flare occurred at about 1 a.m. PDT, followed by an even larger one about eight hours later.

"This one was an X2, twice as intense as the X1 that just occurred," said Bill Murtagh, program coordinator with the National Oceanic and Atmospheric Administration, in an interview Friday morning.

News of the latest activity came as NASA released a spectacular video and image, see above, of a solar eruption in September, what the space agency termed a "canyon of fire."

The video shows a 200,000-mile-long filament leaping from the atmosphere of the sun and creating a rippling, glowing canyon, which "traces the channel where magnetic fields held the filament aloft before the explosion," NASA says.

So what's with all the activity? Our home star is hitting solar maximum in its 11-year cycle activity, and scientists had predicted it would be meh -- a wimpier maximum than in cycles past.

[...]

The sunspot group that has been active Friday is rotating nearer the center of the sun, he noted. If the flares keep up, there could be more serious effects in store for Earth in the next three or four days.

Murtagh said that indeed this is the "lowest solar maximum since back in the 1900-1910 time frame." But that doesn't mean that X-class flares and their attendant problems will not occur. [...]

If you follow the link, it has video.

     

Big Solar Flares this weekend?

Maybe:

Sunspot Blasting Out Major Solar Flares Will Face Earth Soon

The super-active sunspot responsible for unleashing the three most powerful solar flares of 2013 within a 24-hour stretch this week is slowly rotating toward Earth and will likely be facing our planet by the weekend, experts say.

Active Region 1748, as the sunspot is known, unleashed three monster solar flares between Sunday and Monday (May 12 to 13). Every one of the solar storms registered as an X-class flare — the most powerful type — with each successive event stronger than the last, culminating in an X3.2 megablast Monday night.

These solar explosions did not affect Earth, since AR1748 was not facing our planet at the time. But the sunspot is now circling into view, so future flares and any associated eruptions of super-hot solar plasma — called coronal mass ejections (CMEs) — could potentially target our planet, scientists say. [Sun Unleashes Biggest Flares of 2013 (Photos)]

"In a couple of days, it will be far enough onto the disk that any CMEs that we got would probably have some impact on Earth," solar astrophysicist C. Alex Young, of NASA's Goddard Space Flight Center in Greenbelt, Md., told SPACE.com.

AR1748 should be near the center of the solar disk by around Saturday, Young added.

"If it sends something off, then we can expect to get some CMEs sort of head-on" at that point, he said.

[...]

Scientists give AR1748 a 40 to 50 percent chance of firing off another X-class flare, he added, though this probability is a rough estimate that could change as further information becomes available.

X-class flares aimed at Earth can have consequences on a planet-wide scale, triggering widespread radio blackouts and long-lasting radiation storms.

Earth-directed CMEs have even more destructive potential. When a CME's charged particles interact with Earth's magnetic field, they can spawn geomagnetic storms powerful enough to disrupt GPS signals, radio communications and power grids.

Solar activity waxes and wanes over an 11-year cycle. The current cycle, called Solar Cycle 24, is ramping up toward an expected peak later this year. [...]

See the full article for embedded link, and video.