February 4, 2000
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Center
=152.24+/-0.53 degrees PA (SE quadrant) (red radial line) | Maximum height = 1.56+/-0.05 Rsun | |
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Width (at 1.20 Rsun) =
19.59+/-0.35 degrees latitude (measured between edges -- vertical dashed lines at inflection points)
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Width (at 1.38 Rsun) =
13.15+/-0.72 degrees latitude
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Cavity depletion, equatorward (1.20 Rsun) =
0.30+/-0.014 (ratio of red to blue dashed line)
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Cavity depletion, poleward (1.20 Rsun) =
0.06+/-0.019 (ratio of green to blue dashed line)
Minimum intensity in cavity (1.20 Rsun) =
4.0e-07+/-4.0e-09 (Bsun) (blue dashed lines);
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Slope at equatorward cavity edge (1.20 Rsun) =
-6.7e-08+/-8.0e-09 (Bsun/degree)
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Slope at poleward cavity edge (1.20 Rsun) =
1.7e-08+/-8.0e-09 (Bsun/degree)
|
| length lower limit = 3 days
visible in white light at limb February 3; -4; -5 (CME!);
| |
| Recurrence =East limb February 3; -4; -5 (CME!); East limb March 2; -3 (CME!); West limb March 15**; East limb March 30** ; West limb April 13**; Also visible Sep-Dec 1999 | |
| Evolution comments = PCF-S -- same as Sept-Dec 99, but cavity over different portion. Visible both limbs at times. Also visible March 14,16... West limb -- many other days. Possible eruption April 15 -- but no Mk4 data -- and may be too far from pole. System probably exist longer than shown here. At least two Mk4 eruptions, Feb 5 and Mar 3 (orig CME cases). |
| Neutral line orientation at the limb = | |
| CME/dimmings association =
CME Feb 5 (also March 3); | |
| Active region association =
N/A | |
| Filament/FC association = PCF-S; polar crown filament | |
| Other comments:
N/A | |
| Filament -
only visible in H-alpha or EUV
| |
| Necking -
straight up and down neck
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Cavity list (e.g. Tables 2 + 3)
Full list of cavity days observed
List of best cavity days (SET 1) observed (e.g. Table 1)
CMEs associated with cavities (e.g. Tables 7 + 8)
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