On 9/7/17 8:35 AM, David G. McGaw wrote:
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
Oh ho, ANOTHER CME... why we're just seeing bunches of them
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 9/6/17 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 ?
Alan
G3NYK
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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