December 20, 2001
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Center
=175.23+/-0.79 degrees PA (SE quadrant) (red radial line) | Maximum height = 1.53+/-0.06 Rsun | |
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Width (at 1.20 Rsun) =
13.66+/-0.71 degrees latitude (measured between edges -- vertical dashed lines at inflection points)
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Width (at 1.36 Rsun) =
10.97+/-0.87 degrees latitude
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Cavity depletion, equatorward (1.20 Rsun) =
0.15+/-0.029 (ratio of red to blue dashed line)
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Cavity depletion, poleward (1.20 Rsun) =
0.15+/-0.017 (ratio of green to blue dashed line)
Minimum intensity in cavity (1.20 Rsun) =
2.0e-07+/-2.0e-09 (Bsun) (blue dashed lines);
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Slope at equatorward cavity edge (1.20 Rsun) =
-5.4e-09+/-4.1e-09 (Bsun/degree)
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Slope at poleward cavity edge (1.20 Rsun) =
6.0e-09+/-4.1e-09 (Bsun/degree)
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| length lower limit = 3 days
visible in white light at limb December 19; -20; -22*** (LASCO/EIT CME (23)!;
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| No Recurrence analyzed | |
| Evolution comments = Wide cavity over S pole from PCF-S parallel to limb. Also visible Dec 19. No Mk4 data Dec 18, nothing really Dec 17. Visible still Dec 22, no Mk4 data 21, nothing really 23 -- EIT shows erupting filament from the region early Dec 23, and there is a little puff in LASCO, not identified specifically as a CME, and H-alpha shows PCF has disappeared. Note also Dec 20 SW (near equator) cavity eruption (cavity small but visible Dec 19) |
| Neutral line orientation at the limb = | |
| CME/dimmings association =
CME December 23; prominence eruption on December 23; | |
| Active region association =
N/A | |
| Filament/FC association = PCF-S nearly parallel to limb; N/A | |
| Other comments:
CME on West limb Dec 20 (just South of equator) arises from pre-cursor cavity | |
| Filament -
only visible in H-alpha or EUV
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| 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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