[time-nuts] Very large X9.2 solar flare.
David G. McGaw
david.g.mcgaw at dartmouth.edu
Thu Sep 7 11:35:22 EDT 2017
No, the flare also produced a CME, which is expected to reach us
tomorrow and may (hopefully?) trigger a G-3 class geomagnetic storm.
Dept. of Physics and Astronomy
Space Physics Group
(Yes, I am a rocket scientist.)
On 9/7/17 10:47 AM, jimlux wrote:
> On 9/6/17 2:46 PM, David G. McGaw wrote:
>> It also produced a CME. Read the note on spaceweather.com.
>> David N1HAC
>> On 9/6/17 5:19 PM, Alan Melia wrote:
>>> The flare has been and gone!.......is this another case of journalists
>>> mixing up a flare with a CME ?
> 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.
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