[time-nuts] Very large X9.2 solar flare.
cjaysharp at gmail.com
Thu Sep 7 13:04:10 EDT 2017
It's been interesting watching the various web SDRs the afternoon and
seeing the HF bands go silent.
They were recovering a short while ago but I will keep a corner of my eye
on them for the rest of the day
On 7 Sep 2017 5:57 pm, "jimlux" <jimlux at earthlink.net> wrote:
> 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.
> 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 ?
>>> 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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