From the Rice University Spaceweather listserv
Our space weather alert system is in level yellow, and the CME input of energy to the Earth’s magnetosphere still continues.
So, if you live in northern latitudes, go out and look for auroras tonight!
If this level of input continues, the auroras may be seen at lower latitudes, even the US/Canadian border or below.
To get your own alert messages, send an email to spacalrt-subscribe@mailman.rice.edu
To see our predicted space weather page, go to
http://mms.rice.edu/realtime/forecast.html
If we go “red” the auroras will be much lower latitude.
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Spaceweather.com writes:
Analysts at the Goddard Space Weather Lab say the CME impact caused a strong compression of Earth’s magnetic field, allowing the solar wind to penetrate all the way down to geosyncronous orbit for a brief period between 19:06 UT and 19:11 UT. Earth-orbiting spacecraft could have been directly exposed to solar wind plasma during that time.
Update #2: Strong ground currents have been detected in Norway.
Cool.. now if only the sky can be clear.
Red October?
I can see them quite well at times here in southwestern Lower Michigan. They come up to almost overhead and are red to pink and green.
I’ve told my wife about Auroras in Ne Oregon. She may get her chance!..
In my post above, I was referring to the auroras this evening. The best I’ve seen in many years.
The Auroras are now visible in southern Minnesota, although still faint. About an hour ago there was a rather uniform glow towards the north, but now streaks are starting to form.
Just say red northern skies on fire from South Carolina mountains! Wow this far south!
On the coast of BC, so far nothing. Will be keeping an eye out though!
The CME is part of a recurring sequence of CME that come from the same place on the Sun and [almost] every time that place is Earth facing [every 27 days] we get a CME that hits the Earth a few days later.
Saw them here in Ohio, slightly north of Cincinnati:
http://www.whiotv.com/news/news/northern-lights-seen-miami-valley/nFMFp/
Dr. Svalgaard,
Am I reading you correctly that we get a CME from that area of the Sun (mostly) every 27 days? Obviously, not all as strong.
David Falkner says:
October 24, 2011 at 10:29 pm
Am I reading you correctly that we get a CME from that area of the Sun (mostly) every 27 days? Obviously, not all as strong.
Basically yes. That area for many months [sometime years] keeps producing CMEs all the time, but only when it is facing Earth [once per solar 27-day rotation] are we prone to be hit by one. We can also get recurrent moderate geomagnetic activity from high-speed streams emanating from large coronal holes. These are not accompanied by CMEs. Here is an interesting account of a series of recurrent intense storms in 1128 AD http://www.ann-geophys.net/19/289/2001/angeo-19-289-2001.pdf
Leif Svalgaard says:
October 24, 2011 at 11:05 pm
Basically yes. That area for many months [sometime years] keeps producing CMEs all the time, but only when it is facing Earth [once per solar 27-day rotation] are we prone to be hit by one.
That’s incredible. The story you provided the link to and the facts. Thanks! So, is this like a leaky balloon knot or am I being too metaphorical in trying to understand this?
A CME indicates a Forbush Decrease. So then the questions begin. What is the strength of the decrease, if any? What has been any change in diurnal temperature range (DRT)? What change in cloud moisture content?
Has anyone any idea where on might try and get any or all of the above information over the intermet?
Leif Svalgaard says October 24, 2011 at 11:05 pm
What area are we talking about here Leif? You seem to be implying there are periods in the modern record when this has happened. The paper mentions large sunspot groups (but at high latitudes) in 1926, 37 and 47 but doesn’t say anything about them recurring. Have you other periods in mind?
Couldn’t help but notice the relative positions of the gas giants from about Jan 1127 – Jan 1129. I’d better take a cold shower with n-body soap and dream of transits and whipping tops no more 🙂
Here are some amazing pictures from the Marquette, Michigan area last night:
http://spaceweather.com/submissions/large_image_popup.php?image_name=shawn-malone-IMG_3827_1319515267.jpg
The lack of media coverage is striking. Normally NOAA will issue advance alerts, and most TV stations and media websites around here will put out articles like “Watch for the Northern Lights!” and “Watch for monstrous electronic disruptions!”
This one seems to have caught everyone by surprise. It wasn’t warned by NOAA, so it got none of the usual publicity. And yet this was the first aurora in MANY years … maybe the first since 1957??? that was dramatically visible in most of the US. That’s newsworthy by any standard.
(I didn’t see it here; there was a faint reddish glow in the North for a while, but that could have been streetlights reflecting on low clouds.)
AJB says:
October 25, 2011 at 6:06 am
What area are we talking about here Leif? You seem to be implying there are periods in the modern record when this has happened.
Happens all the time. The Sun has a large-scale magnetic structure [ http://www.leif.org/research/Solar%20Sector%20Structure.pdf ] with magnetic polarities organized into broad ‘sectors’ separated by a boundary [which appears in interplanetary space as the so-called Heliospheric Current Sheet]. The boundaries on the Sun are such that active regions located at the right kind of boundary has a much larger chance of flaring and creating unstable filament resulting in CMEs. One discussion of this can be found here: http://www.leif.org/research/Hale-Flares.pdf
Idiots in government do not like to highlight things that they cannot control…like a precursor to a Carrington event.
They do not even want to draw attention to them.
Just how high were the currents induced up north over various man-made conductive infrastructure?
Was there any minor damage or brownouts reported?
If not, what threshold would need to be reached in terms of current induced and scale of CME to cause such damage?
tesla_x says:
October 25, 2011 at 9:57 am
If not, what threshold would need to be reached in terms of current induced and scale of CME to cause such damage?
Some info here: http://www.breadandbutterscience.com/SSTA.pdf
Leif,
Thank you very much.
Is there also an early warning real time monitoring system that an owner of a distributed generation system might monitor or use to trigger a threshold alarm to preemptively disconnect from the grid and run on backup power for a time till the event passes?
Thanks again for any insights you can share.
tesla_x says:
October 25, 2011 at 10:21 am
Is there also an early warning real time monitoring system that an owner of a distributed generation system might monitor
E.g. here: To get your own alert messages, send an email to spacalrt-subscribe@mailman.rice.edu
Here is a nice animation of the CME that hit us: http://www.swpc.noaa.gov/wsa-enlil/cme-based/
Note that we got only a glancing blow.
Take a look at this from the Solar reference pages:
http://www.swpc.noaa.gov/rt_plots/SatEnv.gif
The third chart is usually a fairly regular wave with minor perturbations. Wow.
Leif Svalgaard says October 25, 2011 at 8:30 am
Many thanks Leif. Lots of concepts to get the head around in that lot, exceptionally interesting. Last Slide, “The Issue”: What rules out the sector structure being due of external attenuation that results in longitudinal organization of the field? My copper bucket immediately suggests such forces would only need to be extremely small to produce that kind of ‘resonant’ effect, but maybe there’s a hole in it.