Solar and Interplanetary Activity since Launch – The SECCHI and IMPACT View
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Solar and Interplanetary Activity since Launch – The SECCHI and IMPACT View
Volker BothmerInstitut für Astrophysik der Universität Göttingen (IAG)5th SECCHI Consortium Meeting, 5-9 March 2007
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Currently nearing Solar Activity Minimum
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Recurrent geomagnetic storms
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Geomagnetic Activity shows a secondary enhancement in the declining phases of the sunspot cycle
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Geomagnetic Activity in
2006as measured
by the „Göttingen Solar Wind
Monitor“ at L1-1.5 Mkm
(in operation since 1932)
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Solar Wind Stream Sources
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Geomagnetic Activity in
2006showing a 4
sector structure and a
seasonal pattern
Launch1 2 3 4
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ACE Solar Wind Data in September/October 2006
2 3 4 1
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Solar Wind Stream Sources
2
3 4
1
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SECCHI First Light Observations EUVI A and B
December 4 December 12
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No major proton events in 2006 until December
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Geomagnetic Activity in
2006
One major (Kp ge. 8-) storm in December
2006
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December 2006 Event
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December 2006 Event
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December
2006 Event – IMPACT Observations
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ACE Solar Wind
data for the
December
2006 event
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Geomagnetic Storms / year g.e. 8-
Storms with Kp >= 8- per Year
0
2
4
6
8
10
12
14
1930 1940 1950 1960 1970 1980 1990 2000 2010
Year
N
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Geomagnetic Activity in 2007
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Minimum Expected Mid to End of this Year
STEREO Launch
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Solar Activity and major geomagnetic storms
The most intense storms since 1940
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Since Individual Major Storms can occur at any given time – Stay tuned