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31st July 2014 22:19
Link to Post #41
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4th August 2014 22:03
Link to Post #42
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8th August 2014 15:53
Link to Post #43
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19th August 2014 04:50
Link to Post #44
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21st August 2014 23:35
Link to Post #45
Re: "Geometry" (? !) in Solar Coronal Holes?
Solar wind up a little bit
speed: 336.3 km/sec
density: 6.8 protons/cm3, slightly higher
X-ray Solar Flares
6-hr max: C7 1904 UT Aug21
24-hr: M3 1331 UT Aug21
The weak CME from the other day created very pretty auroras
Despite some flare activity (small), none of these sunspots has the type of complex magnetic field that harbors energy for very strong flares. Solar activity is therefore low.
Planetary K-index - a bit higher than usual
Now: Kp= 3 quiet
24-hr max: Kp= 3 quiet
Interplanetary Mag. Field
Btotal: 5.0 nT
Bz: 0.4 nT south - the field is not as strong as it has been indicating an incoming field polarity shift
no earthside coronal holes
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25th August 2014 21:39
Link to Post #46
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28th August 2014 03:07
Link to Post #47
Re: "Geometry" (? !) in Solar Coronal Holes?
CME of the other day is arriving and making for some beautiful Auroras:
Solar Wind - moderate, with low proton count
328.9 km/sec
density: 2.0 protons/cm3
X-ray Solar Flares
6-hr max: B8 1846 UT Aug27
24-hr: C4 0358 UT Aug27
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4 unsettled
With the charged particles, the auroral OVAL is strong and completely visible over Hudson Bay, and northern Scandinavia.
Although there are no strong coronal holes for the small ones present, there IS geometry starting to form.
Interplanetary Mag. Field
Btotal: 13.1 nT
Bz: 11.2 nT south
(Strong magnetic field fluctuation is indicated)
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29th August 2014 01:16
Link to Post #48
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29th August 2014 15:25
Link to Post #49
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1st September 2014 19:51
Link to Post #50
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5th September 2014 16:31
Link to Post #51
Re: "Geometry" (? !) in Solar Coronal Holes?
NEW SUNSPOTS: NOAA forecasters have boosted the odds of an M-class solar flare today to 55%. The likely source would be one of three new active sunspots that have rotated into view over the sun's eastern limb. A few days ago, the northernmost of these sunspots unleashed a very strong flare; because the blast site was on the farside of the sun, however, Earth was not in the line of fire. This could change in the days ahead..
Solar wind - about normal
speed: 357.7 km/sec
density: 6.3 protons/cm3
Sunspot AR2152 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares..
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2 quiet
Interplanetary Mag. Field
Btotal: 4.9 nT
Bz: 2.1 nT south
Two small earthside facing coronal holes, streaming particles, not excessive..
Auroras from CME's
According to NOAA analysts, the CME from the 2 Sept. filament eruption, will deliver a glancing blow to Earth's magnetic field on Sept. 6th. This is not a particularly fast or powerful CME. Nevertheless, the coming impact could spark auroras. The last two minor CMEs that struck Earth in late August triggered beautiful displays of Northern and Southern Lights.
Background on the FILAMENT ERUPTION, EARTH-DIRECTED: On Sept. 2nd, an enormous filament of dark plasma, which had been snaking across the face of the sun for days, became unstable and erupted. NASA's Solar Dynamics Observatory recorded the blast..
YellowKnife, Canada, 5th Sept.
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13th September 2014 07:41
Link to Post #52
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22nd September 2014 18:56
Link to Post #53
Re: "Geometry" (? !) in Solar Coronal Holes?
The auroral oval is showing brightly with increases in high proton and electron activity
There is a large coronal hole earthside facing, with expected proton streams to arrive 26th thru 27th - how long the hole and proton stream remains active is currently not available.
Bright auroras are showing up in the higher latitudes in the Scandinavian Countries
The satellite environment plots show the activity peaks:
Last edited by Bob; 22nd September 2014 at 18:58.
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24th September 2014 01:40
Link to Post #54
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25th September 2014 00:33
Link to Post #55
Re: "Geometry" (? !) in Solar Coronal Holes?
Solar wind
speed: 409.8 km/sec
density: 6.1 protons/cm3
Solar wind speed is up and proton count still remains high.
The K-index is a code that is related to the maximum fluctuations of horizontal components observed on a magnetometer relative to a quiet day, during a three-hour interval. The conversion table from maximum fluctuation (nT) to K-index, varies from observatory to observatory in such a way that the historical rate of occurrence of certain levels of K are about the same at all observatories. In practice this means that observatories at higher geomagnetic latitude require higher levels of fluctuation for a given K-index.
Now: Kp= 4 unsettled
24-hr max: Kp= 4 unsettled
There is a square-on earth facing which continues to stream particles towards the earth's ionosphere.
Auroral activity remains high in the northern latitudes
and
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25th September 2014 23:48
Link to Post #56
Re: "Geometry" (? !) in Solar Coronal Holes?
Solar wind
speed: 441.9 km/sec
density: 5.0 protons/cm3
Proton count is slightly down, and the current geomagnetic 'ringing' is a bit diminished.
Now: Kp= 2 quiet
24-hr max: Kp= 4 unsettled
The 26-28th could be a bit bumpy as the particle stream from the coronal holes reaches the ionosphere.
There is a strong earth side facing coronal hole WITH square geometry present.
Interplanetary Mag. Field
Btotal: 5.4 nT
Bz: 1.8 nT south
Auroral activity still remains strong
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27th September 2014 00:38
Link to Post #57
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27th September 2014 03:47
Link to Post #58
Avalon Member
Re: "Geometry" (? !) in Solar Coronal Holes?
Those auroras re magical Bob. Appreciate you taking the time to post all those. Just breathtaking. Thank you.
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The Following 2 Users Say Thank You to Sidney For This Post:
Bob (27th September 2014), Chanlo23 (9th October 2014)
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27th September 2014 18:22
Link to Post #59
Re: "Geometry" (? !) in Solar Coronal Holes?
Electron flux is starting to rise a bit.
Solar wind
speed: 391.6 km/sec
density: 4.6 protons/cm3
proton density down slightly, wind speed slower slightly
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 4 unsettled predicted
Solar coronal hole with geometry still earthfacing - particle streams still expected through the 28th - strong geomagnetic activity in the high latitudes is expected over the next 24-48 hours
Auroral activity is still high, showing up strongly in the northern latitudes.
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29th September 2014 02:51
Link to Post #60
Re: "Geometry" (? !) in Solar Coronal Holes?
Solar wind - slowing down
speed: 374.7 km/sec
density: 3.2 protons/cm3 - dropping
A set of solar coronal holes (with geometry) is still earthfacing, and streaming particles.
There was a brief blip in both electron and proton levels, which lasted no more than an hour.
The blip caused some minor fluctuation in the geomagnetic fields.
This map shows where on the planet the current concentration of Electrons are located over.
Auroras are still great in the upper Latitudes
Last edited by Bob; 29th September 2014 at 03:08.
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