This is a PRELIMINARY listing of Mauna Loa Mark-III White Light Mass Ejections during the YOHKOH period of observations (October 1991 through present). LIST IS CURRENT THROUGH OCTOBER 5, 1994. If you need additional information please contact: Alice Lecinski (303) 497-1523 alice@hao.ucar.edu or Joan Burkepile (303) 497-1506 iguana@hao.ucar.edu 11/17/91 91d321 Quiescent Prominence at position angle: 52, 118, 228, 232, 262, 317. Eruptive Prominence at position angle: 104-110, to 1.25 radial value. Coronal Mass Ejection in the same region. Prominence lifted at position angle: 225-236 around 23:19 UT. No coronal changes noted. 12/17/91 91d351 Quiescent Prominence at position angle: 100, 165, 190, 250 (1.12R). Limbflare at position angle: 262 between 19:39- 19:51 UT, grew to 1.2 radial value. Looks like a faint mass ejection from 19:46 until ~20:12 on west equator. Appears to be a faint loop/cavity. Fades as it moves outward. Need to calibrate and look at this again. Viewed raw (.rq) files only.(jb) 1/4/92 92d004 Quiescent prominences at position angles: 0, 50, 70, 115, 120, 170, 250, 280 and 310 degrees. Active region from 250 to 260 degrees. Coronal mass ejection on west limb around active region, with post flare loops from 19:00 to 21:00 UT. 1/14/92 92014 Quiescent prominences at position angles: 50, 52, 68 to 76, 94, 265, and 275 degrees. Active regions from 100 to 108 degrees and 126 to 135 degrees. Coronal mass ejection from 90 to 130 degrees. Depletion from 90 to 120 degrees and enhancement at 130 degrees. No prominence or flare observed except for active regions noted above. 1/23/92 92d023 Quiescent prominences at position angles: 94, 128, 188, 278, 285, 290 and 315 degrees. Limb surge at position angle 78 degrees. Large active prominence from 212 to 230 degrees to 1.15 solar radii with small changes during observations. Small coronal enhancement west limb around bright streamer. No other apparent coronal activity. NOTE: The active prominence in the southwest disappeared from the limb between Jan 23 and Jan 24 observations. In addition, the fuzzy helment streamer and cavity overlying the prominence were gone. A small, sharp, brighter helmet streamer was visible in the Jan 24 data. It appears that a coronal mass ejection with a prominence eruption occurred between Jan 23 and Jan 24. (jb) Please refer to the following paper for a detailed description of this event: 'Reformation of a Coronal Helmet Streamer by Magnetic Reconnection after a Coronal Mass Ejection', Hiei, E., A.J. Hundhausen, D.G. Sime. Geophysical Research Letters, Vol. 20, No. 24, Pgs. 2785-2788 December 23, 1993. 2/5/92 92d036 Quiescent prominences at: 91, 170, 189 and 256 to 260 degrees position angle. Limb flare at 19:02 UT from 257 to 259 degrees below 1.05 solar radii. Active region from 270 to 286 degrees. Corona: Large mass ejection between 20:13 and 21:32 UT from 240 to 300 degrees position angle. Depletion bewteen 270 and 280 degrees. 2/22/92 92d053 Quiescent prominences at: 50, 90, 180 to 190 and 310 degrees position angle. Corona: Possible mass ejection on east limb just north of equator from 21:09 to 21:44. Fuzzy material with possible deflections. No clear front. (jb) 4/4/92 92d095 Quiescent prominence at: 260 degrees position angle. Active region from 300 to 310 degrees. Prominence erupts from 300 to 310 degrees. Moves out to 1.5 solar radii and fades from halpha filter. Small prominence appears at position angle 115 degrees at 18:36 UT. Corona: Mass ejection occurs with eruptive prominence at 115 degrees between 18:28 and 20:00 UT. 6/27/92 92d179 Quiescent prominences at 125, and 235 degrees position angle. Eruptive prominence at 280 degrees from 18:31 to 19:04 UT. Extends out to 1.15 solar radii by 18:47 UT and disappears from halpha filter by 19:04 UT. Nice post flare loops appear ~19:48 UT from 250 to 260 degrees. Corona: Coronal mass ejection in same location as prominence eruption (280 degrees pa.). Corona restructures itself by 20:36 UT. No other coronal activity seen. 3/12/93 93d071 Quiescent Prominence at position angle: 138, 244, and 268-280. Coronal Depletion at position angle: 270-280, from 17:47-19:52 UT. CME detected from 17:47 - 18:06 UT. 2 Loops: one at 250 - 320 degrees, the other at 280 - 305 degrees. Named "Vodka". 3/15/93 93d074 Quiescent Prominence at position angle: 68, 108, 118-130, 240, and 288. Active Region at position angle: 256-266. Coronal Mass Ejection at position angle: 260-300, from 21:15-22:00 UT. Event was in progress at 21:15. MKIII missed the top of the mass ejection. Base of coronal mass ejection is V-shaped from 21:41 until ~21:51. Prominence Monitor sees the development of post flare loops at ~270 degrees position angle. Additional information available upon request. 4/11/93 93d101 Quiescent Prominence at position angle: 74-80, 123, 264-272, 285, and 314. Active Region at position angle: 248-257, Limb Flare between 19:20-19:45 UT, radial value 1.1, overlying corona at postion angle: 240-260 enhanced. May have missed a mass ejection. Motion on west limb near equator throughout observations. (17:21 to 21:59) Could be the tail end of a mass ejection. Cavity may be present near edge of the field of view. (V-shaped??) (jb) After recalibration on 7/28/94, the west limb still looked very active. However there were no signs of a CME that Alice and I could find. Ther was a lot of motion there, but no CME. (BC) 4/12/93 93d102 Quiescent Prominence at position angle: 60, 123, and 140. Active Region at position angle: 240 an 256-263. Small Limb Flare at position angle: 240, between approximately 19:00-19:45 UT. Subtle brightness changes in West Limb corona between position angle: 240-290. Probable coronal mass ejection: Loop/cavity moves slowly outward on west limb just north of equator throughout observations. (17:22-22:02) Loop front is at ~2.8 solar radii at 285 degrees by 21:33. (jb) There is a definite loop on the west limb at angle ~285 that expands outward very slowly throughout the day. More movement seems to be happening closer to the end of the day. (BC) -possibly the beginnig of a CME?? 4/30/93 93d120 Quiescent Prominence at position angle: 80-88, 228, 258, 280, 288, and 306. Two Coronal Mass Ejections; 1. Southwest Limb. Loop(?)/cavity with prominence(?) core at ~230 degrees position angle. Event was in progress when coronameter was turned on. Promienence(?) is gone by ~19:20. Trajectory information: Three features were measured. The top of the loop(?) the top of the cavity (i.e. the back of the loop) and the top of the prominence(?) core. In all cases both a first order (constant velocity) fit and a second order (constant acceleration) fit were generated to the data points. In all cases we preferred the second order fit to the data. When the second order fit is preferred, the reported speed is the speed at the time of the last data measurement. Top of Loop(?) - 154 km/sec at 18:44:49 (at 2.60 solar radii) Top of Cavity - 192 km/sec at 18:44:52 (at 2.42 solar radii) Top of Prominence(?) - 167 km/sec at 19:43:01 (at 2.56 solar radii) 2. Northeast Limb. Bright mound in northeast. Outer edge becomes fuzzy after 18:29:56. Mound was visible when instrument came on at 17:33. Trajectory information: We measured the top of the mound in the mk3, channel zero field of view. We preferred the second order fit to the data. The speed at the time of the last data measurement was: Top of Mound - 108 km/sec at 18:29:56 at 1.57 solar radii ADDITIONAL INFORMATION ON THESE EVENTS IS AVAILABLE UPON REQUEST. (jb 12/20/93) With the new calibration, the two CME's can be seen vwry clearly at the beginning of the day. The CME in the southwest appears to throw off a rather large mass. (8/1/94 -BC) 5/30/93 93d150 Quiescent Prominence at position angle: 50, and a disturbed group at position angle: 70-90. A faint loop appeared at position angle: 200, around 17:55 UT. Prominence at 305 brightened throughout the day. Spray/Ejection occurred at 120 around 21:04 UT. Remarkable trio of North-South prominences. Filaments across the disc near thhe equator. 6/11/93 93d162 Observers - A Coronal Mass Ejection was observed, possibly in progress, around 17:15 UT and ending at 19:40 UT, at postion angle: 240 and 280. Post Flare Loops were observed extending from the underlying Active Region. jb at HAO - Slow-moving loop(?)/cavity and bright core on west limb. Visible over many hours. Prominence monitor exposures are bad. Post flare loops are barely visible. cath-- Definite coronal enhancement, but no CME seen. 6/28/93 93d179 Quiescent Prominence at position angle: 125, 275-288, 299, and 317. Slight brightening of SouthWest streamers. CME occurs at position angle 260 - 280 degrees. Starts at 17:05 and ends at 17:25. The CME is named Denali. 10/31/93 93d304 Quiescent Prominence at position angle: 63, 229, and 242. Large CME at PA 90 beginning 19:06 and ending 20:21. 11/19/93 93d323 Quiescent Prominence at position angles: 100, 113, and 238. Possible active region, slightly visible on monitor at 76 degrees. Coronal enhancement at position angle 80 degrees from 19:05(?) to 21:32. CMELST alert sent out. (mlso observers) Enhancement is centered at 78 degrees and firat appears between 19:00 and 19:30. It is a small, very bright mound approximately 08 degrees wide and rises to a height of 1.4 solar radii by the time observations end at 22:27. It is the brightest feature in the corona. No obvious coronal mass ejection or large motions in the corona above the enhancement. Need to check prominence monitor film when it arrives. (jb) 2/27/93 93d361 Quiescent Prominences at 130, 279 Active Region at 75. Eruptive prominence from 240 to 270 degrees 18:46 to 19:26 Coronal mass ejection from 240 to 270 degrees from 17:46 to 19:52. Speed measurements available. Contact Joan Burkepile (303) 497-1506. email: iguana@ncar.ucar.edu 1/11/94 94d011 Quiescent prominence: None visible. Small mass ejection on west limb (d. chu). 1/28/94 94d028 Quiescent prominences: None reported. Active region at 282 degrees. Surge at position angle 282 degrees at 19:54 UT. Extends out to 1.15 solar radii. There is some coronal brightening, with some subtle depletion above the brightening between position angles 255 and 285 degrees. Sent cmelst advisory. 1/29/94 94d029 Quiescent prominences: None reported. Coronal mass ejection and eruptive prominence at 270 degrees from ~18:35 until ~19:30 UT. Prominence visible up to a height of ~1.1 solar radii. Cmelst sent out. 5/01/94 94d121 Quiescent prominences at position angles: 235, 250, and 260-280. CME observed at PA 275 from 17:57 to 18:47. 5/10/94 94d130 Quiescent prominences at position angles: 55, 290. An eruptive prominece at the limb occured at PA 93-115 between the times of 20:30 to 21:30. CME alert sent out. Surges around PA 74 start around 17:00 to 18:14 extending to around 1.1 solar radii. 7/13/94 94d194 Quiescent prominences at position angles: 46, 58, 83-95, 113, 229, 282, and 295-300. There was subtle coronal activity in the northwest limb. Wavering prominence at ~315 degrees (C Andrulis) 7/19/94 94d200 Quiescent prominences at position angles: 66, 240-249, and 303. Subtle coronal depletion at PA 200-213 around 18:44-19:13. 8/14/94 94d226 QP: 132-136; 228; 284-288; 296. AR: 88-92. Possible CME: 19:08 - 20:22 UT, PA 270-300. Coronal depletion between 19:08 - 19:50 UT. Coronal enhancement between 19:50 - 20:22 UT. The weather was too poor to detect the possible CME. (C Andrulis) 9/12/94 94d255 QP: 104, 247, 255, 185, 270. No coronal activity, however a surge was noted at PA=255 with RV=1.1 (18:28 UT). 10/5/94 94d278 QP: 55, 99, 139, 225, 283-286. EPL: 245 between 23:00-0:00 UT. 10/7/94 94d280 QP: 82, 135, 252, 258-270. AP: 18:23 UT: PA=252, RV=1.1; 19:00 UT: PA=260, RV=1.1 10/9/94 94d282 QP: 53-57, 78-87, 126, 137, 171. EPL: 102-108 between 0:30-1:15 UT to 1.3 RV. No coronal activity. 10/11/94 94d284 QP: 65, 110-125, 225, 267, 287. AP: Small surge at 23:00 UT, PA=85, RV=1.1 11/3/94 94d307 QP: 75, 90-105, 265, 307, 317. Coronal enhancement at PA 250 between 20:28-20:56 UT. Coronal depletion at PA 255 between 21:28-22:21 UT, also possible bright wave front seen during this period. CME detected at 240-250 PA, between 21:21-22:11 UT. [CA] Faint, off-limb. [CA] 11/9/94 94d313 QP: 68, 93, 100, 125, 134, 140, 236. AP: 257 surge at 20:25 UT. No coronal activity. 11/14/94 94d318 QP: 40, 128, 240-260, 303. AP: 105-120. Possible depletion at PA=250-320 from 18:47-19:19 UT. Image quality decrease, but no coronal activity. [CA] 12/13/94 94d347 QP: 45-50, 59, 137, 245, 280-290, 298-312. Possible surge at 22:10, PA=300, RV=1.15 12/20/94 94d354 QP: 63, 85, 100, 133, 240-250, 257-267, 289, 308. Slight depletion at PA=245 at 20:40. Some activity at PA~245-250, 20:30-22:32 UT. [CA] 1/3/95 95d003 QP: 40-60; 66; 78; 115-130; 220; 265. Enhancement at PA=100 at 19:33 UT. Depletion at PA=260 at 19:36 UT. 1/5/95 95d005 QP: 49-62; 120. Wavering prominences at PA 310 and 320 [CA] 1/17/95 95d017 QP: 90; 125; 135. Slight depletion noriced in last difference image at PA=100-110 and PA=270. 1/22/95 95d022 QP: 47; 300; 310-317. Large hooking prominence at PA=95 - 100, RV to 1.2. Faded by midday. Possible small CME at PA=300 early between 17:57 and 18:30 UT. No apparent coronal activiey evident afterwards. I didn't see the possible CME. [CA] 1/23/95 95d023 QP: 112, 230, 260, 295-320. CME at PA 95, at ~19:00 UT. [VP] 1/29/95 95d029 QP: 47; 60; 100; 213; 281. Possible CME at PA 130-140 between 20:40 and 23:06 UT. I didn't see the possible CME [CA] (Double-check - Ulysses sees a CME on Feb 3 at S44.2 degrees at 1.56 AU) 2/7/95 95d038 QP: 62; 128; 240. AP: 312 gradually expanded throughout the day. Some enhancement at PA ~ 310. [CA] No other coronal activity. 2/12/95 95d043 QP: 70; 90; 117; 270; 300. AR: 215-250. Subtle coronal activity at region overlying AR. Changes diminshed or became buried in the noise aound midday as sky got noisy. 2/18/95 95d049 QP: 47; 66; 102; 113; 120; 230; 286; 306. Prominence at PA=66 slowly elongated during day, RV-1.15 No coronal activity. 2/19/95 95d050 QP: 66; 72; 106; 117; 285; 305. EPL: PA 230-240, RV 1.2+ from before 19:22-19:31 UT. CME: Coronal changes occurred between PA 240-290, between around 19:22 - 20:53 UT. 2/20/95 95d051 QP: 83; 103; 120; 291; 313. EPLs: one at PA=300, out to RC=1.1, from 19:00 on; another at PA=272, out to RV=1.15, from approx. 19:30 - 20:30. Coronal depletion at PA=272 from approx. 20:15 to 20:50. 2/24/95 95d055 QP: 45; 230; 252; 302; 318. EPL: Small surge from ~1900 on at PA=125, RV=1.1 No coronal activity. 2/28/95 95d059 QP: 45; 97; 223; 260; 288. Prominence expanding from 21:30 on at PA=288. No coronal activity. 3/2/95 95d061 QP: 50; 205-223; 260-270. CME: PA 260-310, 19:29-21:18 UT. 3/5/95 95d064 QP: 45; 238; 243; 300. May have had coronal activity between PA 0-30 but the changes may have been due to spar buffeting. I don't see any activity here, but there is a lot of noise and also a smudge over this region that would obscure any movement. [CA] 3/8/95 95d067 QP: 60-70; 86; 115; 135; 285-295; 305-313. AP: 240-250, RV 1.1, between 17:51 - 18:50 UT. No coronal activity. 3/10/95 95d069 QP: 57; 245; 295; 305. AP at PA=250-260 throughout the morning. No coronal activity. 3/11/95 95d070 QP: 40; 243; 280; 292; 303. EPL from ~19:00 to 21:00 at PA=55-70, out to RV=1.25 No coronal activity. 3/17/95 95d076 QP: 53; 115-125; 255-260; 308-315. Possible faint CME occurring 18:30 - 19:26 UT at PA=35-135. [CA] 3/21/95 95d080 QP: 240-255; 273; 298. CME at PA=125 throughout observing day. 4/6/95 95d096 QP: 135-145; 240; 270-300. Changes in coronal VDIFF images seen, but they may be from changing sky as broken cirrus moved across sky all day. No coronal activity. [CA] 4/22/95 95d112 QP: 73; 100; 133; 232. Large CME from 18:15 or earlier to 20:00 UT at PA=270, with associated surge in same area out to RV=1.15. CME at PA=280-295 and from 17:34 to 18:19 UT. [CA] 4/27/95 95d117 QP: 50; 97; 122-130; 303. AP: 250-260 grew slowly throughout morning. No coronal activity. 6/4/95 95d155 QP: 100; 140; 315. AP: 120-125. CME at PA 120 from 19:30-21:00 UT. PA= 120-145. Faint, best seen in difference images [CA]. 6/8/95 95d159 QP: 115; 230; 243; 285; 300. AP: 70-75 grew slowly throughout morning. No coronal activity. 6/14/95 95d165 QP: 125; 133; 225; 272; 315. Coronal enhancement at PA 250-300 between 16:56 and 20:23 UT. Enhancement may be an effect of all the cirrus [CA]. 7/27/95 95d208 QP: 43; 130; 255. Small EPL or limbflare at PA 70 from 19:07 to 19:39 UT. No coronal activity. 8/18/95 95d230 QP: 12; 32-44; 55; 120; 223; 275; 303. AP: 65-85, large surge at this location from 17:00 to 18:30 UT, out to RV=1.35. CME accompanied surge. CME is from 17:13 - 17:55 UT at PA=60-95. It is a loop/ cavity configuration. A bright spot of matter in the center of the cavity moves out a bit, and then falls back to the sun [CA]. 8/26/95 95d238 QP: 85; 100; 135; 257; 287; 304. EPL at PA=100, RV=1.1, at 21:10 UT. No coronal activity. 9/4/95 95d247 QP: 45; 80; 110; 129; 225; 317. Active loop EPL from start of observations through most of day, at PA=260-275 out to RV=1.25, possibly accompanied by long lasting CME. A faint loop CME with EPL loop inside, PA=265-280, starts ~17:10, and is present, but lost in the noise at 21:10 UT [CA]. 9/16/95 95d259 QP: 35-45; 67-82; 124; 223; 287; 315. No coronal activity. Faint blob ejected at PA~60, visible 20:47 - 21:25 UT [CA]. 9/17/95 95d260 QP: 35-45; 95; 240; 280-285. EPL at PA 70-80 between 17:50 - 19:05 UT, RV to 1.15. Subtle coronal enhancement observed over region.