Here is a list of activity seen in Mauna Loa. For those people in your group not familiar with the Mauna Loa instruments here is a quick explanation of the instruments:
MK3/MK4 - white light coronameters with field of views 1.12-1.45 and ~1.09 to ~1.79 respectively. Daily images
PICS: Halpha limb and disk data Daily images and movies
CHIP: Helium 1083nm disk and limb Daily images and movies
All data have 3 minute time resolution
------------
I've included a list of activity for periods +/- 7 days
from your sigmoid
observations. (from Joan Burkepile)
(note- I have also highlighted in red
those events that appear to be in the right general location for the sigmoid.
This is only a first guess indicator, and should be treated accordingly
- S. G.)
8/06/99 99d218
MK3 data from
17_00 to 22_07
MK4 data from
17_00 to 22_07
Slow, faint
mound shaped CME on west limb. Speed
measurement
may be possible with subtraction images.
Slow expansion
of coronal material on west limb in progress
when observations
begin at 17:00. Front is best seen from
~18:00 to
20:00 UT.
Width measurement
in direct images: 273 to 297 degrees (24 deg wide)
at 2.0 solar
radii at 20:10 UT
Remeasure
using subtraction images since this is so faint.
Is this the
core of an earlier CME?
Upon viewing
LASCO C2 data: CME(s) all day on west limb. Data
gap between
15:50 and 17:50 in daily movie. CME is visible
out to at
least 5 Rsun in C2 at 17:50 and continues until next
day. MK4 probably
sees core of this event.
(jb)
PICS: No apparent eruptive activity. (td)
CHIP: No apparent eruptive activity. (td)
8/07/99 99d219
MK3 data from
17_05 to 22_11
Faint structure,
possibly a CME, centered at PA 244 is visible
in mk3 from
20:56-21:52 UT. Data for this time period is pretty
noisy so it
is difficult to say for certain whether this is a
mass ejection,
but I think I saw a LOOP-like structure at about
this time
period. I couldn't make out any other features.
Approximate
width if the structure is 16 degrees. (td)
PICS: No apparent eruptive activity. (td)
CHIP: No apparent eruptive activity. (td)
8/08/99 99d220
MK3 data from
16_56 to 22_17
No apparent
coronal activity. (td)
PICS: No apparent eruptive activity. (td)
CHIP: No apparent eruptive activity. (td)
8/09/99 99d221
MK3 data from
16_34 to 22_14
Possible CME
(very faint) in MK3 data from 19:29-20:59 UT.
Appears as
a widening of the corona which may travel outward.
Motion is
centered at PA 298 degrees and has an approximate
width of 28
degrees. No discernable features were
observed.
(td)
PICS: No apparent eruptive activity. (td)
8/10/99 99d222
No data taken
at MLSO today.
8/11/99 99d223
MK3 data from
16_57 to 21_25
No apparent
coronal activity. (td)
PICS: No apparent eruptive activity. (td)
CHIP: No apparent eruptive activity. (td)
8/12/99 99d224
MK3 data from
16_55 to 22_03
Poor data
quality due to clouds over Hawaii. No coronal
activity.
(td)
PICS:
Possible surge on limb at PA 65 degrees from 18:37-19:15
UT. Western-most portion of polar crown filament disappears
beginning around 18:45 UT. (td)
CHIP: Long, thin surge at PA 60 degrees from 18:37-19:04 UT.
Material appears as a thin jet shooting radially outward.
Portion of North polar crown filament can be seen travelling
rapidly eastward. Small filament eruption from tiny AR in
SE
quadrant.
Visible in CHIP from 21:31-22:04 UT. (td)
8/13/99 99d225
MK3 data from
16_46 to 21_14
Mk3: No apparent
coronal activity (als)
PICS:
Active filament at PA 50-60. No apparent eruptive
activity. Small brightening in AR in SW quadrant but no
apparent eruptive
activity. (td)
CHIP: No apparent eruptive activity. (td)
8/14/99 99d226
MK3 data from
16_53 to 21_59
Mk3: No apparent
coronal activity (als)
MK4: Very narrow "ray-like" CME visible in MK4 from 19:36
until 20:06. The event is centered at PA 60 with an
approximate width if 7 degrees at 2.0 Rsun (approximately). (td)
PICS: Large active prominence on NW limb but no apparent
eruptive activity.
AR near NE limb is active throughout the
day. (td)
CHIP: No apparent eruptive activity. (td)
8/15/99 99d227
No MK3 data.
PICS:
Data quality poor due to clouds. No apparent
eruptive activity.
(td)
CHIP:
data quality poor due to clouds. No apparent
eruptive activity.
(td)
8/16/99 99d228
MK3 data from
16_34 to 22_06
Mk3: No apparent
coronal activity (als)
MK4:
Another narrow CME that may qualify for the "ray-like"
CME category.
Visible in MK4 from 17:22-18:35 UT and centered
at PA 114.
Approximate width is 9 degrees. While prominence
material is
the predominately visible component to this event,
the is a faint
outer LOOP. (td)
PICS: Small EPL at PA 70. Time: 16:56,17:38 UT.
Material
loops over from the south to the north. Most of the material
appears to return to the limb. Another, narrow EPL at PA 117
degrees which
seems to coincide with MK4 CME, 17:20-18:15 UT.
Material ejects
in the form of a jet. Hard to say how much
material leaves
the limb. On the disk, the thin filament
eruption mentioned
in limb data is visible in disk data as
well.
Small filament eruption originating from small AR on the
south meridian.
Material ejects from the east side of the AR
from 16:52-17:04
UT. (td)
CHIP:
Interesting looking jet-like eruption from the SE limb
at PA 115
degrees from 17:24-18:15 UT. Material appears to
travel radially
outward in a stream. (td)
8/17/99 99d229
MK3 data from
16_38 to 22_20
Mk3: No apparent
coronal activity (als)
MK4: No apparent coronal activity. (td)
PICS:
Two ribbon flare in progress at start of observing day
in NE quadrant. The flare appears to affect two nearby
filaments, one small one to the NE disappears at 17:12 UT and
another filament to the south also appears to be affected. (td)
CHIP:
Short observing session due to work on mk4. No apparent
eruptive activity.
(td)
8/18/99 99d230
MK3 data from
17_10 to 22_30
Mk3: No apparent
coronal activity (als)
MK4: No apparent coronal activity. (td)
PICS: No apparent eruptive activity. (td)
CHIP:
Portion of large filament in the NW quadrant appears to
erupt beginning
at 17:42 UT. Only the northern-most tip of the
filament seems
affected. (td)
8/19/99 99d231
MK3 data from
16_56 to 21_58
Mk3: No apparent
coronal activity (als)
MK4: No apparent coronal activity. (td)
PICS: No apparent eruptive activity. (td)
CHIP: No apparent eruptive activity. (td)
8/20/99 99d232
MK3 data from
16_37 to 20_36
MK3: No apparent
coronal activity (td)
MK4:
CME visible in MK4 data from 18:33-19:24 UT. The CME
is centered
at PA 104 degrees and has an approximate width of
about 40 degrees.
There is a reasonably prominent LOOP feature
behind which
a CAVITY could be discerned. (td)
CHIP: Arcade
of loops on the SE limb at PA 120 are active
throughout
the day but I saw no eruptions from them. There is
also a large
prominence on NW limb which appears to erupt but I
can't tell
the start time. The material is gone by 18:13 UT. (td)
PICS:
Large APL @PA 330-350 degrees. Material arches over
northward
toward the pole. Not much, if any, material leaves
the limb.
Nice arcade of loops in SW at PA 120 degrees.
Wispy,
faint material high above the surface in NW quadrant
lifts off. (td)
8/21/99 99d233
MK3 data from
17_05 to 22_10
MK3: No apparent
coronal activity (td)
MK4: No apparent coronal activity. (td)
CHIP: No apparent eruptive activity. (td)
PICS:
Flare visible in AR on central meridian early in the
day.
The brightening from the flare extends outward from the
AR in both
an easterly and westerly direction. (td)
8/22/99 99d234
MK3 data from
16_54 to 22_02
MK3: No apparent
coronal activity (td)
MK4: No apparent coronal activity. (td)
CHIP:
Possible filament eruption from west side of large AR in
SW quadrant,
18:15-19:18 UT. Material appears to travel
northward
and southward from either side of AR. (td)
PICS: No apparent eruptive activity. (td)
8/23/99 99d235
MK3 data from
16_57 to 22_05
MK3: No apparent
coronal activity (td)
MK4: No apparent coronal activity. (td)
CHIP: Possible
prominence eruption from large AR in SE
quadrant,
along the west side, 18:03-18:39 UT. Most of the
material appears
to return to the surface. (td)
PICS:
Filament eruption, associated with a flare in the AR in
the SE quadrant
visible from 18:00-18:19 UT. Material appears
to travel
NE ward. (td)
8/24/99 99d236
MK3 data from
16_36 to 22_03
MK3: No apparent
coronal activity (td)
MK4: No apparent coronal activity (td)
CHIP: Flare from large AR in SE quadrant, 16:48-18:51 UT. (td)
PICS: The flare
seen in CHIP (mentioned above) looks like a two
ribbon flare
it is located in large AR in SE quadrant. Visible
in CHIP from
16:48-18:25 UT. (td)
8/25/99 99d237
MK3 data from
18_11 to 22_54 MK3: Not many images due top
maintenence
work on MK4 instrument. No apparent coronal
activity (td)
MK4:
Not much coronal activity visible due to adjustments
of the instruments.
No apparent eruptiive activity. (td)
CHIP: Interesting
filament eruption in SW quadrant, 18:05-18:59
UT.
The filament eruption is followed by a circular wavefront
which is is
followed by an apparent two ribbon flare. There
is
also an active filament on the NW limb. (td)
PICS: Filament
eruption in SW quadrant (18:05-18:32 UT).
Filament is
very small and there was no visible wave as there
was in CHIP
data. There was a second filament eruption near NE
limb (18:44-20:13
UT). Again, the filament was very small.
Large AR on
south-central meridian flares from 20:10-21:10 UT.
Small flare from tiny AR in nW quadrant from 18:26-19:34 UT. (td)
8/26/99 99d238
MK3 data from
18_11 to 22_54
MK3:
CME centered at PA 145 degrees with an approximate width
of 30 degrees
was visible in MK3 data from 16:48-17:14 UT.
There is an
identifiable LOOP associated with this event but
I could not
make out any CAVITY or CORE features. (td)
MK4:
CME centered at PA 145 degrees, width is approximately 26
degrees.
Visible from 16:52-17:44 UT. Nice LOOP and CAVITY
structure
but no visible core features. There is also a
second, jet-like
structure just to the north of the CME loop
which seems
to follow behind it. This may be a second CME.
(td)
PICS: Disappearing
filament in NE quadrant from 20:29-21:35
UT.
It appears to be affected by a nearby brightening so it
may not actually
erupt. Large AR in NE shows flaring activity
throughout
the day. Small filament near the south pole appears
to lift off
of surface @ 1735 UT. (td)
CHIP: Surge visible at PA 290 from 21:18-21:57 UT.
Disappearing
filament in Ne quadrant visible from 20:29-21:35
UT.
(td)
8/27/99 99d239
MK3 data from
16_44 to 22_11
MK3:
CME visible in MK3 from 19:53-20:20 UT. Very faint LOOP
and CAVITY,
no visible CORE. CME is centered at PA 65 degrees
at 1.8 Rsun
and has an approximate width of 28 degrees at 1.6
Rsun.
LOOP appears to widen slightly as it travels outward on
a somewhat
SE-ward trajecotry. (td)
MK4:
CME centered at PA 62 visible from 19:49-20:45 UT. There
are two faint,
large loops visible in the MK4 data. The outer
one may be
the loop front, followed by a dark region (possible
cavity).
The second loop brings up the rear. The second loop
is the brighter
of the two and I'm pretty sure this is what I saw
in MK3.
Approximate width of the CME is 43 degrees at 1.8 Rsun.
(td)
CHIP: Jet-like
eruption from large AR in SW quadrant,
18:17-19:05
UT. Material appears to shoot straight out from
the AR.
(td)
PICS:
Two ribbon flare in progress from AR in SW quadrant at
beginning
of observing day (16:39 UT). Appears to last until
20:44 UT.
At 18:10 UT, there is a small, bright flare followed
by a jet-like
eruption (also visible in CHIP). (td)
8/28/99 99d240
MK3
data from 17_03 to 22_13 MK3: CME visible from 18:05-18:41
UT. Very wide and fast, centered at PA 200 degrees at 1.9 Rsun
with an approximate width of 80 degrees at 1.9 Rsun. CME
quickly emerges from limb and spreads out to cover a wide
range. (td)
MK4:
Very large, fast CME visible from 18:09-19:01 UT. Located
near S. polar
region, this event has a wide loop travelling
southward
from pole. Centered at PA 192, width is ~76 degrees
at 1.9 Rsun.
(td)
PICS: Large
two ribbon flare on east side of AR in SW
quadrant.
Flare travels along neutral line marked by the
filament visible
prior to the event. (td)
LASCO:
LASCO and EIT observed a partial halo CME on Saturday,
1999/08/28.
The CME was associated with an X1.1 flare in AR
8674. The
event was first visible in C2 at 18:26 UT as a bright
structured
front over the SW limb, with excess coronal
brightness
and outward motion visible over about 260 degrees in
PA, from PA
20 (NE) to PA 280 (W). The projected speed of the
leading edge
in C3 was 400 km/s at PA 215 (SW).
EIT observed
the X flare beginning at about 18:00 UT, followed
by evacuation
of the corona over the SW limb. (Simon Plunkett,
GSFC)
8/29/99 99d241
MK3 data from
17_06 to 22_16
No apparent
coronal activity (td)
MK4: No apparent coronal activity. (td)
CHIP: No apparent eruptive acvtivity. (td)
PICS: No apparent eruptive activity. (td)
8/30/99 99d242
MK3 data from
16_38 to 22_13
No apparent
coronal activity (td)
MK4:
Faint CME centered at PA 4 degrees with an approximate
width of 45
degrees at 1.8 Rsun, visible in MK4 from 18:11-
18:47 UT.
Faint loop structure visible, no other features
evident.
(td)
CHIP: Large
filament eruption from large AR on North central
meridian from
20:54-22:08 UT. A second filament eruption
occurs from
the AR just to the south. (td)
PICS: Bright
flare in AR on N-central meridian, 17:38-20:38
UT.
There is a second flare just to the east of this AR
visible from
20:51-21:30 UT. This flare is long and thin with
a N-S orientation.
(td)
8/31/99 99d243
No data taken
at MLSO today.
9/01/99 99d244
No MK3 data.
9/02/99 99d245
MK3 data from
16_59 to 21_42
MK4: No apparent coronal activity. (td)
PICS:
Flare and filament eruption from AR in NW quadrant,
17:42-20:39
UT. Small disappearing filament near south pole,
17:29-18:40.
Another small disappearing filament on
south-central
meridian, 17:29-18:09 UT. (td)
CHIP: Flare
from AR in NW quadrant visible from 17:42-20:39.
Appears as
a swelling in the AR. This is the same flare as the
one mentioned
in PICS above. (td)