The flare has been and gone!.......is this another case of journalists
mixing up a flare with a CME ?
Alan
G3NYK

----- Original Message -----
From: "Mark Sims" holrum@hotmail.com
To: time-nuts@febo.com
Sent: Wednesday, September 06, 2017 8:50 PM
Subject: [time-nuts] Very large X9.2 solar flare.

It also produced a CME.  Read the note on spaceweather.com.

David N1HAC

On 9/6/17 5:19 PM, Alan Melia wrote:

The Sun is very active this week! Lots of space weather warnings:

http://www.swpc.noaa.gov/news/g3-watch-7-through-9-september-2017-due-cme-effects

https://www.space.com/38057-sun-unleashes-decades-strongest-solar-flare.html

http://www.swpc.noaa.gov/news/s1-warning-extended-8-september0600-utc

http://www.arrl.org/news/space-weather-prediction-center-upgrades-geomagnetic-storm-watch-to-g3-strong

Bill Byrom N5BB

On Wed, Sep 6, 2017, at 04:19 PM, Alan Melia wrote:

There was some of both.  SDO saw a flare, STEREO saw a CME.

Andy

When I saw the OP I did a quick check of my GPS receivers status. One of them, a Jackson Labs M2M replacement (actually a U-blox M8T) had just reset and gone to a 111ms offset.
Was that due to the CME?
Was it one of Murphy’s laws « Looking for problems actually creates them » ?
Or a result of Heisenberg’s principle in the macroscopic domain « You can’t measure something without disturbing it » ?

"The power of accurate observation is commonly called cynicism by those who have not got it. »
George Bernard Shaw

On 9/6/17 2:46 PM, David G. McGaw wrote:

CME was earlier this week, whether it is connected to the subsequent
flare, or it's just coincidence is a question of heliophysics.

This is somewhat poorly understood - in fact, in a few years (2021 -
NASA funding willing) we're going to put some satellites into orbit
above GEO to look at radio emissions (Type II radio bursts) from the sun
connected with CMEs.  Time-nuts connection is that we're going to be
doing interferometry among the multiple satellites which means the
independent recordings have to be time synchronized for processing.
We're planning on using GPS satellites on the "other side" of the earth,
grazing the limb, and a suitably stable onboard oscillator.  I don't
imagine I have to explain the general timing concept to this particular
crowd<grin>.

The idea is that we can see more of the physics of the creation and
emission of the CME, and more importantly, where the changes are
occurring as the CME evolves.

CMEs, as the name implies, occur in the corona.  Flares are tied to
sunspots, and occur in the surface or deeper.  Granted, both phenomena
are all tied up in twisting lines of magnetic fields, so there may be
some relationship among them.

I'm just learning all this heliophysics stuff - all I have to do is
build, launch, and operate the satellites - Top women and men on the
science team will do the physics with the data.

They mostly do but the flare is over in minutes and the CME is not visible
except in any auroral effects unless you run a magnetometer.....yes that
does take 2 days to get here so we get a warning. We are continually seeing
reports that flares affect the power lines and there is no
warning........mixing up the two events.

Alan
G3NYK

----- Original Message -----
From: "David G. McGaw" david.g.mcgaw@dartmouth.edu
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Wednesday, September 06, 2017 10:46 PM
Subject: Re: [time-nuts] Very large X9.2 solar flare.

No, the flare also produced a CME, which is expected to reach us
tomorrow and may (hopefully?) trigger a G-3 class geomagnetic storm.

http://www.spaceweather.com/archive.php?view=1&day=07&month=09&year=2017

David N1HAC
Dartmouth College
Dept. of Physics and Astronomy
Space Physics Group
(Yes, I am a rocket scientist.)

On 9/7/17 10:47 AM, jimlux wrote:

On 9/7/17 8:35 AM, David G. McGaw wrote:

Oh ho, ANOTHER CME... why we're just seeing bunches of them