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06 Sep 2017 12:38

JackDole wrote:
The strongest solar storm of the last 11,000 years was possibly 774/775. https://en.wikipedia.org/wiki/774%E2%80 ... n-14_spike

That's the one I was thinking about!  It makes Carrington look like a non-event.  I'm not sure that can be compared to a supervolcano event either though as the last supervolcano eruption was 80,000 years ago.  I think that was Toba?
https://www.space.com/18667-ancient-sol ... arbon.html
http://www.pbs.org/wgbh/nova/next/ancie ... -pinpoint/


So far, scientists have discovered in trees two solar storms that manifest as rings with dramatically increased levels of C-14, an isotope of carbon. The first, found in 2012, dates back to 775 AD—the second, to 994 AD.

https://www.theguardian.com/science/201 ... chronology

In 2012, the Japanese scientist Fusa Miyake identified a dramatically raised level of C-14 in one set of growth rings that is known to date from 775AD. Since then, what the Oxford team call a second Miyake event – a consequence of a catastrophic extraterrestrial discharge of energy – has been identified from the year 994AD.

Where checks have been made on tree rings, these have been on a decadal basis – which is why no-one noticed the rare single-year anomalies of the past. Such celestial violence may also have been witnessed: the Anglo-Saxon Chronicle records an eerie “red crucifix” in the sky in 774AD.

https://eos.org/articles/did-solar-flar ... e-on-earth

Mid- some parts of the US grid are antiquated- back in August 2003 we had a big blackout that lasted for almost 24 hrs and took out power to 55 million people (eastern Canada too), it was memorable to me because I was outside and I saw everything just stop trains, cars, traffic lights, phones stopped working, the water stopped running, etc.  It happened on a Friday afternoon at 4:30 and it was like everything had been turned off- and it was, literally!
 
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06 Sep 2017 13:28

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06 Sep 2017 20:51

The X flare sent out yet another Earth-directed CME, probably reaching us on the 8th for more G2 or G3 storms.  It is neat watching the CME sweep up the slower solar wind streams as it moves out:

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07 Sep 2017 00:05

Watsisname wrote:
The X flare sent out yet another Earth-directed CME, probably reaching us on the 8th for more G2 or G3 storms.  It is neat watching the CME sweep up the slower solar wind streams as it moves out:

Image

Is it going to cause anything serious on Earth? Like, some errors on electronics or at least few seconds/minutes of disabling them? And did we have in the past anything serious?
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07 Sep 2017 00:32

It'll have effects, but shouldn't be too serious. The flare itself ionized the upper atmosphere, which cut out high frequency radio communications on the sunlit side of Earth.  The CME (Coronal Mass Ejection) will impact the Earth's magnetic field, which results in ground currents which can affect some electronics and power systems, but at this intensity shouldn't cause very much in the way of widespread damage.  It also causes auroral displays farther south than usual.

Here's a good reference page for the three main types of effects (radiation storm, geomagnetic storm, and radio blackouts) that solar activity have on the Earth, at different levels of intensity:

http://www.swpc.noaa.gov/noaa-scales-explanation

The current status, forecasts, and models for these are also available from the Space Weather Prediction Center.  It's a good site to have marked for anyone interested in keeping up with what's going on or knowing when to look for aurora. :)

Another good source is http://www.spaceweather.com

Added:  It looks like the earlier CME has already impacted us, but so far the results aren't too impressive.  Just minor Kp=4 storming.  Sometimes it ramps up as the tail of the CME sweeps by, though, and the next CME released by the X flare may also be more powerful.
 
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07 Sep 2017 02:30

Some nice aurora displays from a couple of days ago.
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07 Sep 2017 08:13

midtskogen wrote:
Source of the post Some nice aurora displays from a couple of days ago.

Thats pretty crazy, looks surreal
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07 Sep 2017 19:20

Looks like the core of the second storm hit us 2 hours ago.  I see it mentioned that aurora might be visible as far south as Virginia!
 
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07 Sep 2017 19:38

Following the aurora information it never quite seems to reach my location, would have to drive a few hours north :(
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07 Sep 2017 20:15

Doc, it's coming south again!  Aurora reported as far south as Little Rock, Arkansas and Oklahoma!  Someone reported a power outage in Michigan (they said the power went out three times)  they think might be connected to the event.
 
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07 Sep 2017 20:52

A-L-E-X wrote:
Source of the post Aurora reported as far south as Little Rock, Arkansas and Oklahoma

Are you sure about that?  I am not finding anything about it
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07 Sep 2017 21:09

I am amazed, but it's true!  A photographer noticed some red curtains for a brief period after sunset in Arkansas.  They're very subtle and low to the horizon.

The geomagnetic storm is currently spiking to G4 "severe" levels with Kp=8.   Very impressive, but even then it is unusual to see aurora that far south.

I bet people in central Canada, Montana and North Dakota are now getting an incredible view.
 
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07 Sep 2017 21:35

Watsisname wrote:
Source of the post I bet people in central Canada, Montana and North Dakota are now getting an incredible view.


I am currently in south east Michigan, sadly just inside the city limits of Ann Arbor so light pollution is pretty bad.  I went outside and walked a bit but haven't seen anything in the northern direction.
Oh well :(
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07 Sep 2017 21:41

DoctorOfSpace wrote:
A-L-E-X wrote:
Source of the post Aurora reported as far south as Little Rock, Arkansas and Oklahoma

Are you sure about that?  I am not finding anything about it

I saw two pictures on Twitter from Arkansas.
https://twitter.com/mikepricephotog/sta ... 9471559680
and
https://twitter.com/brianemfinger/statu ... 0874863617
also this excellent one from Kentucky
https://twitter.com/_keitharnett/status ... 2175212544
and this
http://www.swpc.noaa.gov/products/alert ... d-warnings …  Aurora may be seen as low as Alabama and northern California

Doc, SE Michigan is where the blackouts were reported!

Also there are some magnificent northern lights images from Iowa and you are NE from there, it must be the light pollution being why you can't see it :( I hate light pollution!
 
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07 Sep 2017 21:48

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