EIT Images of the E limb events of 1996/10/19 - 10/20
Another zipper event
Note: All these data are preliminary, unpublished,
and not for formal, scientific attribution.
If you wish to analyze EIT data, please see the
EIT data rights policy.
All images are in Fe XII 195 Å.
Click on the thumbnails for a 512 x 512 pixel representation of the full-field,
195 Å image.
Fe XII 195 Å filament activation/arcade reconnection
Click on the thumbnails for 512 x 512, 2 x 2 (on-chip) binned GIF images.
A GIF movie of the EIT Fe XII 195 Å, full-frame
images for 1996 October 19 01:05 - October 20 10:58 UT.
The first event (starting at ~ 1996/10/19 13:00 UT) shows a large, eruptive
prominence extending to ~ 0.25 solar radii above the SE limb at 17:00 UT. That
is, the filament material is still "cool" (absorbing 195 A) some 2 hours after
the beginning of the event --- if not more, since this event looks as though it
involves the S polar crown filament on the back side of the Sun. In other
words, a lot like the earthward-directed CME of
1997 February 7, but ~ 130° farther E. In this case, we also see a
"zipper" (of reconnection?) at the S edge of the close coronal field (i.e., the
N edge of the S polar hole) similar to that observed on
1996 September 25.
Also worthy of note is the faint, apparently loop emission feature that looks
as though it is just behind the erupting prominence in the 17:00 UT image. (All
these features are more obvious in the half-resolution [512 x 512] originals
than in the smaller movie or thumbnail representation of the images.
A second, smaller event on the NE limb occurs between 1996/10/20 05:00 and
08:55 UT: what looks like an active EFR on the limb, with a small loop emerging
from it, suddenly has an open, dark area above it.
- The SE-NW extension of the filament channel toward the W limb begins to
show a brightening arcade in the 1997 February 6 22:38 UT image.
- Changes in the polar crown filament channel can be seen from at least
1997 February 7 00:12 UT.
- There is a brightening, perhaps connected with an Eward eruptive event,
near the E end of the south polar crown filament channel visible starting
in the 1997 February 7 01:48 UT image.
In case it isn't obvious, this is really preliminary and may well
be wrong, partially or totally. So exercise a little rational thought before
accepting anything said on this page.
Joseph B. Gurman
Responsible NASA official:
Joseph B. Gurman,
Facility Scientist, Solar Data Analysis Center
NASA Goddard Space Flight Center
Solar Physics Branch / Code 682
Greenbelt, MD 20771
Last revised - J.B. Gurman