CMEs: Cause (Observed by SOHO), and effects (ACE).

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michaelmozina

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On 6/22/09 at around 6:12 SOHO observed the second of two explosive events in 195A, the first event can be seen on 6/21/09 at about 11:30. I've been kicking myself for days for missing these events in real time, especially since both events are pointed directly at us. I've tried to look at these events in STEREO images, but evidently some of you guys are hogging up all the bandwidth big time and I keep getting page load errors! :)

I've since been attempting to track the effect of these events in the ACE data. The SOHO images of the events can be found here:

First event at 11:30 (2.4 meg MPG):
http://lasco-www.nrl.navy.mil/daily_mpg ... it_195.mpg
Second event at 6:12 (1.5 meg MPG):
http://lasco-www.nrl.navy.mil/daily_mpg ... it_195.mpg

The ACE spacecraft has seen a few smaller density pulses over the past few days, but it recorded a significant uptick in both the density and velocity of the solar wind on 6/24 with a spike around 17:30. Since that time the solar wind density has dropped off a bit but the velocity seems to be remaining at elevated levels since the event. I'm curious to see how fast (if) the velocity drops again.

http://www2.nict.go.jp/y/y223/simulatio ... 181032.jpg
http://www2.nict.go.jp/y/y223/simulatio ... 211153.jpg

If you want to download an AVI movie of the event on the 24th as recorded by ACE (about 21 megs), you can do so here:

http://www3.nict.go.jp/y/y223/simulatio ... 090624.avi

If you notice, there is actually an uptick in the solar wind density that occurs at about 19:30 on the previous day (23rd) that drops off again about 5:00 on the 24th. The big event (lots of red in the magnetosphere) occurs at around 17:30 where we see a large increase in density and the velocity of the solar wind. I'm highly impressed with the format and presentation of the ACE data.
 
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michaelmozina

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IMO the new active regions that have formed in the southern hemisphere over the last week or so, as well as the overall increase in activity probably signify the beginning of the sun's active phase. I suspect we'll observe a lot more CME events and sunspots over the next year than we've seen over the past couple of years.
 
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harrycostas

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G'day Michael

Thank you for those links

You may have these links

Active region loops. EIT 171A. (Sep. 18-21, 2001)
http://sohowww.nascom.nasa.gov/bestofso ... 1hicad.mpg

Closeup of active region - flares and loops, EIT 195� (Aug. 2002)
http://sohowww.nascom.nasa.gov/bestofso ... 5Aug02.mpg

Dazzling active region crossing disk (Jun. 2 - 12, 2003)
This one is about 20 Megs
http://sohowww.nascom.nasa.gov/bestofso ... 5strip.mpg

This one is about 6.4 Megs
http://sohowww.nascom.nasa.gov/bestofso ... tripsm.mpg

It show the electromagnetic fields reocnnection one of the key processes of the universe.
 
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