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SOLAR WATCH * Huge X8.2 Flare Sept. 10, 2017! (Updated Daily)
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[quote:Boceph:MV8xMzgyOTUyXzM2MzU5NjYzX0FCQkUyMEU0] [quote:TS66:MV8xMzgyOTUyXzM2MzU5NTA3X0Y4Q0ZGRDIy] [quote:Boceph:MV8xMzgyOTUyXzM2MzU5MjYyX0RCQjBCOEFF] hey guys, what is "Phi" on these graphs... in blue...? http://www.solarham.net/solarwind.htm [/quote] This is Nin's explanation of Phi. http://mysolaralerts.blogspot.com/p/what-is-solar-phi-angle.html I'm not really seeing a storm guys other than the mag simulation .... which I rarely look at anymore, so I'm having a hard time comparing it I guess. Wind speed, temp, and density are pretty steady and are for the most part low if anything. Bz is closed up. http://www.swpc.noaa.gov/ace/MAG_SWEPAM_24h.html Global D is clear. [/quote] [quote:psyoptics:MV8xMzgyOTUyXzM2MzU5NTQ2X0VCQTQwOEIw] [quote:Boceph:MV8xMzgyOTUyXzM2MzU5MjYyX0RCQjBCOEFF] hey guys, what is "Phi" on these graphs... in blue...? http://www.solarham.net/solarwind.htm [/quote] [quote:http://mysolaralerts.blogspot.com/p/what-is-solar-phi-angle.html] [b]The Phi angle = Interplanetary magnetic field polar angle Phi is the angle of the interplanetary magnetic field that is being carried out by the solar wind[/b] [/quote] [quote:http://helios.gsfc.nasa.gov/qa_sun.html#magphi] In these plots Phi is indeed the angle of the interplanetary magnetic field that is being carried out by the solar wind. Phi is measured in the GSM (geocentric solar magnetospheric) coordinate system. In this system the X-axis points from the Earth to the Sun and the Z-axis is pointing along the direction of the Earth's north magnetic pole. This puts the Y-axis roughly pointing to the left as one looks at the Sun from the Earth. Phi is the angle made by the field in the XY plane. This means that Phi would be 0 deg if the were pointing at the Sun and 180 deg if it were pointing from the Sun to the Earth. Looking at the plot for December 14-19 I see that it is most often between 90 deg and 180 deg (say ~135 deg on average). This is a typical angle when the magnetic field is coming from the southern hemisphere of the Sun (at least during the decade from 2000 to 2010 - the Sun's field flips over every 11 years or so). [/quote] [/quote] Thanks!... had just turned off the lazy switch and went there to check :1doh1: [/quote]
Original Message
Please See Current Events Discussion On Last Page :)
We have just had another huge X flare measuring at a X8.2 originating from sunspot 2673
On September 11, 2017
[
link to legacy-www.swpc.noaa.gov
]
ALL flares recorded ARE Earth facing regardless of where the sunspot is located
-----------
CME FROM X9 HAS ARRIVED!
Issue Time: 2017 Sep 07 2242 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2017 Sep 07 2255 UTC
Valid To: 2017 Sep 07 2330 UTC
IP Shock Passage Observed: 2017 Sep 07 2229 UTC
On September 6th we have had 2 X flares! A X2.2 at 09:10 utc & a secend larger flare just a few hours later of X9.3 at 12:02 utc. There is a large widespread Earth directed CME associated with this latest X flare as we can see here
[
link to stereo.gsfc.nasa.gov (secure)
]
[
link to stereo.gsfc.nasa.gov (secure)
]
An update as to the arrival time of this CME will be added once all data has been reviewed.
The X9.3 flare is the 14th largest X flare ever recorded!
On September 4th we had 7 M flares from fast growing sunspot 2673, with at least 1 large dense Earth directed CME. This CME will arrive late in the day on Wednesday September 6th.
There is now a 25% chance for X flares over the next 24hrs & 71% chance for M flares
We have a Long Duration M2.4 Solar Flare starting
01:05 UTC July 14th 2017
There was a full halo CME observed with this solar flare. The associated CME is Earth Directed. See discussion on the last page for all updates!
1,000,000 Views hit on July 3, 2012
A big thanks to all the wonderful contributors of
the GLP Solar Watch thread!
Please See Current Events Discussion On Last Page :)
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