08/19/2014 @ 10:50 UTC
Weak CME Impact
Attached data courtesy of the ACE space craft shows that a weak shock passage was observed overnight. A geomagnetic sudden impulse measuring 12nT was detected at 07:00 UTC. Solar wind speeds increased slightly to above 350 km/s and the Bz component of the interplanetary magnetic field (IMF) has been variable. As of this update, only a very minor increase in geomagnetic activity is being detected. More updates to follow this morning when required.
Yes, I am sure.
Are you sure? August 19 - an Earth directed filament eruption which arrived yesterday
Check the news.
The biggest sunspot on the face of the sun in more than two decades unleashed a major flare on Friday (Oct. 24), the fourth intense solar storm from the active star in less than a week
The solar flare occurred Friday afternoon, reaching its peak at 5:41 p.m. EDT (2141 GMT), and triggered a strong radio blackout at the time, according to the U.S. Space Weather Prediction Center. NASA's sun-watching Solar Dynamics Observatory captured stunning video of the huge solar flare.
The flare erupted from a giant active sunspot known as AR 12192 and was classified as an X3.1-class solar storm — one of the most powerful types of solar storms on the sun — but it is not the first time the sunspot has made its presence known. [Biggest Solar Flares of 2014 in Photos]
"This is the fourth substantial flare from this active region since Oct. 19," NASA spokesperson Karen Fox wrote in a status update.
This just doesn't look good, but I'm no expert!
"Solar flares are powerful bursts of radiation," Fox wrote in the NASA update. "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."
AR12192 is due to rotate back onto our side of the sun today and and it has grown. Because of its size, the leading edge would actually have appeared about a day earlier.
On its first pass, the huge AR12192 was comparable in size to Jupiter and produced several (ordinary) X-class flares and many smaller ones, but no large CMEs.
But Hugh Hudson of Space Sciences Laboratory at Berkeley, California, notes that older active regions tend to produce more CMEs, so he is expecting a big CME show this time around.
The so-called Carrington flare of 1859 produced aurorae visible in Queensland, and damaged telegraph stations around the world. Our modern technological world is far more vulnerable.
So, if AR12192 launches any large CMEs in our direction when it comes around to our side, we’d better batten down the hatches.
That can mean disconnecting long-distance power grids, placing satellites in safe mode and rerouting aircraft on polar routes.The Conversation
AR 12192 rotated into view on Oct. 18th. It was already an area of intense and complex magnetic fields and soon grew into the largest such region in 24 years.
Region 2209, the return of old sunspot 2192, produced a C8.4 peaking at 06:09 UTC. The former giant looks to have decayed significantly while transiting the farside of the sun. We will get a better look at what remains of the region as the day progresses.