MLSO Activity Logs

Activity logs list daily events and activity observed with each instrument. To view an activity log, scroll through the list to the right and click on the year in which you are interested.

Movie Events Archive

Movies Showing Solar Rotation

Animations of the H-alpha (PICS), K-corona (Mk3/Mk4) and Helium-I (CHIP) data were made of the first 8 months of 1999.

K-corona Mk3 movie (MPEG, 400kB).
H-alpha PICS movie (MPEG, 700kB).
Helium-I CHIP movie (MPEG, 2MB).

Movies of Activity and Events

The movies below are either mpegs or animate (merged) gifs. The animated gifs are not endless loops. You might find that the browser will not rerun the movie upon hitting page reload (in Firefox, for example). To view repeatedly, save the file and open it in a media player.

Typical Events Near Solar Maximum:

89d003
A CME from January 3, 1989, (88kB, mpeg). Welcome to Solar Maximum! A large CME can be seen moving away from the sun at position angle 130 degrees. It takes place from 18:04-18:39 UT.
89d082
A CME from March 23, 1989, (124kB, mpeg). Short but sweet! This CME can be seen at position angle 330 degrees. The classical advancing loop can be seen moving away from the sun at 19:27-20:13 UT.
89d229
A CME from August 17, 1989, (536kB, Merged-GIF). A beautiful CME can seen coming off the sun at position angle 260 degrees. The advancing loop, along with enormous amount of embedded prominence material can be viewed from 18:32-19:16 UT.
90d093
A CME from April 3, 1990, (559kB, Merged-GIF). It appears that there are 2 magnetic loops that meet at the limb around 60 degrees. There is in fact only 1 huge CME that extends from Position Angle 30 degrees - 110 degrees. It occurs from 17:23 - 18:04 UT.
90d134
A CME from May 13, 1990, (79kB, mpeg). Today's CME occurs at Position Angle 130 degrees from 18:29 - 19:57 UT. There appears to be an abundance of prominence material embedded in the CME following the advancing loop. Interestingly, the prominence material appears to approximately maintain its structure as it moves through the field of view.
90d167
A CME from June 15, 1990, (1MB, Merged-GIF). The Coronal Mass Ejection occurs between Position Angles 0 degrees and 20 degrees. There is an abundance of prominence material embedded in the CME following the advancing loop. The show takes place between 18:00 - 19:28 UT.
90d196
A CME from July 15, 1990, (153kB, Merged-GIF). A big CME can be seen exploding off the sun near Position Angle 350 degrees. It occurs during the time of 18:49-19:32 UT.
90d298
A CME from October 25, 1990, (555kB, Merged-GIF). A huge CME can be seen leaving the sun between 17:20-18:05 UT. There is an abundance of prominence material exploding outward at position angle 300 degrees. The main advancement of the CME occurs is the same area, though the edges extend from 270-350 degrees.

Typical Events Near Solar Minimum:

86d288
A double-loop CME, a double-loop CME from October 15, 1986, (558kB, Merged-GIF). This magnificent event occurs at position angle 270-325 from 20:34 - 21:21 UT.
96d126
A CME on May 5, 1996, (823kB, Merged-GIF). A brilliant CME is seen leaving the sun between position angles 90-120 degrees. Near position angle 120 degrees prominence material can be seen embedded in the CME. The event takes place from 18:30-19:45 UT. It will be known as the flower CME due to its tulip shape beginning around 19:22 UT.

Events by date:

80d046
A CME from February 15, 1980, (2MB, Merged-GIF). The first CME event for the MKIII instrument. The CME is very slow, but can be seen moving away from the sun at position angle 210 degrees. There is quite a bit of prominence material leading the CME from the sun rather than the classical advancing loop. The event takes place from 19:46-21:37 UT. Notice how the Coronal Mass Ejection gets larger as it moves farther away from the sun.
80d122
A CME from May 1, 1980, (707kB, Merged-GIF). A HUGE CME centered at position angle 100 degrees can be seen blasting off from the sun. There is an abundance of prominence material between 80-100 degrees. The event takes place from 19:18-19:43 UT.
80d155
A CME from June 3, 1980, (979kB, Merged-GIF). Don't mind the bugs while admiring this CME at position angle 95 degrees. Notice the classical advancing loop and the embedded prominence material following the loop. This spectacular event takes place from 21:36-22:09 UT.
80d218
A CME from August 5, 1980, (260kB, Merged-GIF). A beautiful CME can be seen moving away from the East limb at position angle 70 degrees. In the beginning it looks like a comma (,), but this quickly dissipates as the large amount of prominence material moves farther away from the limb. The entire event takes place from 18:43-20:32 UT.
80d221
A CME from August 8, 1980, (106kB, Merged-GIF). A CME at position angle 120 degrees is moving away from the sun from 20:00-20:34 UT.
80d235
A CME from August 23, 1980, (257kB, Merged-GIF). A CME is in progress at the beginning of the observing period at position angle 275 degrees. There is an abundance of prominence material ejecting out from the sun, and it can still be seen in the field of view when the event is cut short. The event seen takes place from 17:45-18:04 UT.
80d245
A CME from September 1, 1980, (694kB, Merged-GIF). A faint CME can be seen at position angle 80 degrees. The event occurs from 17:54-18:20 UT.
80d271
A CME from September 27, 1980, (954kB, Merged-GIF). A rather strange shaped CME at position angle 270 degrees. It is in progress at the beginning of the observation period, 17:23-18:09 UT. There is prominence material following the advancing loop.
81d024
A CME from January 24, 1981, (755kB, Merged-GIF). A faint CME with some visible prominence material is positioned at 85 degrees. The event takes place from 22:56-23:23 UT.
81d076
A CME from March 17, 1981, (467kB, Merged-GIF). A faint CME with little prominence material is at position angle 60 degrees. The event occurs from 19:57-20:23 UT.
81d286
A CME from October 13 1981, (377kB, Merged-GIF). A large CME at position angle 90 degrees can be seen moving away from the sun between 18:13-18:41 UT.
81d322
A CME from November 18, 1981, (1.5MB, Merged-GIF). A huge CME at position angle 260 degrees can be seen blasting out from the sun. There is a large advancing loop followed by an enormous amount of embedded prominence material. This material seems to enlarge as it advances out and into the cavity of the CME. The event takes place from 20:15-21:58 UT.
81d349
A CME from December 12, 1981, (719kB, Merged-GIF). A beautiful CME at position angle 280 explodes away from the sun from 19:46-20:41 UT. The southern region of the CME contains an abundance of prominence material.
84d079
A double CME, a double CME from March 19, 1984, (429kB, mpeg). The first CME consists of two loops. It occurs at position angle 25-50 from 19:09 to 20:18 UT. The second CME is a blob of matter. It occurs at position angle 95-110 from 19:53 to 21:36 UT.
86d288
A double-loop CME, a double-loop CME from October 15, 1986, (558kB, Merged-GIF). This magnificent event occurs at position angle 270-325 from 20:34 - 21:21 UT.
88d063
A polar CME, a CME over the south pole from March 3, 1988, (153kB, mpeg). This appears from 21:30 - 22:39 UT at position angle 160-190.
89d003
A CME from January 3, 1989, (88kB, mpeg). Welcome to Solar Maximum! A large CME can be seen moving away from the sun at position angle 130 degrees. It takes place from 18:04-18:39 UT.
89d018
A CME from January 18, 1989, (157kB, mpeg). A huge CME can be seen between position angles 290 degrees and the north pole. It occurs from 18:20-19:11 UT. It looks like there may be two CME's, but in actuality there is only one. A small loop can be seen moving away from the limb around 18:59 UT, but it is merely prominence material being pulled (so to speak) away with the force of the CME.
89d057
A CME from February 26, 1989, (174kB, mpeg). A CME can be seen moving away from the sun near position angle 20 degrees. It occurs from 18:38-19:45 UT.
89d076
A CME from March 17, 1989, (128kB, mpeg). This bright CME can be seen between 17:33-18:21 UT. It occurs at position angle 300 degrees.
89d082
A CME from March 23, 1989, (124kB, mpeg). Short but sweet! This CME can be seen at position angle 330 degrees. The classical advancing loop can be seen moving away from the sun at 19:27-20:13 UT.
89d085
A CME from March 26, 1989, (353kB, mpeg). A CME with a fair amount of prominence material can be seen exploding off the sun at position angle 40 degrees. It occurs between 17:58-20:38 UT.
89d100
A CME from April 10, 1989, (184kB, mpeg). A large CME can be seen exploding off the sun between 0-10 degrees. The event is quite bright and occurs from 18:37-20:19 UT.
89d208
A CME from July 27, 1989, (520kB, Merged-GIF). What an incredible sight!! The huge advancing loop can be seen from 17:41-18:22. It is quite large and occurs between 270-200 degrees.
89d210
A CME from July 29, 1989, (587kB, Merged-GIF). This faint, but large CME can be seen moving away from the sun between Position Angles 100-160 degrees. The advancing loop can be seen throughout the field of view from 16:59-17:43 UT.
89d212
A CME Experience: The Trilogy from July 31, 1989, (1MB, Merged-GIF). There are 3 CME's that can be seen. The 1st occurs at position angle 100 degrees from 18:00-18:18 UT. It is very faint, and may be mistaken as a wave front leading the second CME. This is a very large CME between PA: 100-110 degrees. There is an abundance of prominence material embedded just behind the advancing loop. It's rather spectacular. This event occurs from 18:27-19:05 UT. The 3rd CME appears at 20:01-20:53 UT before leaving the field of view. Although very faint, this CME can be seen at PA: 110 degrees.
89d218
A CME from August 6, 1989, (1MB, Merged-GIF). A rather large CME can be seen moving away from the sun at position angle 100 degrees. There is prominence material embedded on the southern edge of the CME. The material remains in the field of view longer than the advancing loop of the CME making the entire event last from 17:36-19:00 UT.
89d229
A CME from August 17, 1989, (536kB, Merged-GIF). A beautiful CME can seen coming off the sun at position angle 260 degrees. The advancing loop, along with enormous amount of embedded prominence material can be viewed from 18:32-19:16 UT.
89d230
A CME from August 18, 1989, (882kB, Merged-GIF). A CME can be seen at position angle 270 degrees. It occurs from 17:36-18:47 UT. before disappearing out of the field of view.
89d243
A CME from August 31, 1989, (971kB, Merged-GIF). A beautiful CME can be seen at position angle 110 degrees. It occurs from 17:05-19:42 UT.
89d252
A CME on September 9, 1989, (819kB, Merged-GIF). A CME can be viewed at position angle 260 degrees. Its rather large and occurs from 19:28-20:30 UT before leaving the field of view.
89d261
A CME on September 18, 1989, (522kB, Merged-GIF). At position angle 280 degrees the classic CME with what looks to be 2 advancing loops can be seen leaving the sun. There is in fact 1 CME that occurs between 20:59-21:36 UT. The observing was cut short, hence the CME is still in the field of view at 21:36 UT.
89d278
A CME on October 5, 1989, (769kB, Merged-GIF). It's rather beautiful at position angle 290 degrees. There is a huge amount of prominence material embedded just behind the advancing loop. The event occurs from 17:14-18:10 UT. Remnants of the CME can still be seen in the field of view at 18:10 UT.
89d293
A CME on October 20, 1989, (683kB, Merged-GIF). It is a nice classical CME with an advancing loop at position angle 270 degrees. There is some prominence material, though not much. The event takes place during 20:27-21:45 UT.
89d295
A CME on October 22, 1989, (899kB, Merged-GIF). WOW!! Centered around 250 degrees, this CME extends from 180 degrees to 290 degrees. It is absolutely huge. Prominence material can be seen exploding away from the sun just behind the advancing loop. The event occurs between 17:33-18:45 UT.
89d311
A CME on November 7, 1989, (606kB, Merged-GIF). At position angle 60 degrees. The event takes place from 20:37-21:34 UT. There is a stream of prominence material following the advancing loop above 60 degrees. It looks like smoke rising up and out of the field of view.
89d344
A CME on December 10, 1989, (1MB, Merged-GIF). At position angle 160 degrees, this CME is slow moving though brilliant none-the-less. The CME looks as if it is made up of a huge "clump" of prominence material. The event takes place from 17:44-19:45 UT.
89d345
A CME on December 11, 1989, (640kB, Merged-GIF). Beginning at 18:22-19:23 UT this CME can be seen at position angle 80 degrees. Prominence material can be seen just beyond the advancing loop starting at 18:54 UT.
90d029
A CME from January 29, 1990, (335kB, Merged-GIF). It is located at Position Angle 260 degrees from 20:11 - 20:39 UT.
90d093
A CME from April 3, 1990, (559kB, Merged-GIF). It appears that there are 2 magnetic loops that meet at the limb around 60 degrees. There is in fact only 1 huge CME that extends from Position Angle 30 degrees - 110 degrees. It occurs from 17:23 - 18:04 UT.
90d128
A CME from May 8, 1990, (990kB, Merged-GIF). There are 2 CME's present. The first occurs at Position Angle 280 degrees from 18:43 - 19:31 UT. The second occurs at Position Angle 200 degrees from 18:43 - 20:36 UT. It is very faint against the dark background. It can be seen best starting at 19:31 UT.
90d134
A CME from May 13, 1990, (79kB, mpeg). Today's CME occurs at Position Angle 130 degrees from 18:29 - 19:57 UT. There appears to be an abundance of prominence material embedded in the CME following the advancing loop. Interestingly, the prominence material appears to approximately maintain its structure as it moves through the field of view.
90d148
A CME from May 27, 1990, (316kB, Merged-GIF). This CME occurs at Position Angle 320 degrees from 17:45 - 18:06 UT.
90d152
A CME from May 31, 1990, (251kB, mpeg). A narrow Coronal Mass Ejection can be seen at Position Angle 345 degrees. The familiar loop of an advancing CME doesn't appear to be leading this CME from the sun, instead it looks like a stream of smoke rising up and out of the field of view. The CME occurs from 18:43 - 20:06 UT.
90d167
A CME from June 15, 1990, (1MB, Merged-GIF). The Coronal Mass Ejection occurs between Position Angles 0 degrees and 20 degrees. There is an abundance of prominence material embedded in the CME following the advancing loop. The show takes place between 18:00 - 19:28 UT.
90d186
A CME from July 5, 1990, (296kB, Merged-GIF). The faint CME can be seen between the North Pole and 5 degrees. It occurs from 18:42 - 19:57 UT.
90d196
A CME from July 15, 1990, (153kB, Merged-GIF). A big CME can be seen exploding off the sun near Position Angle 350 degrees. It occurs during the time of 18:49-19:32 UT.
90d233
A CME from August 21, 1990, (850kB, Merged-GIF). One large CME can be seen from Position Angle 280-310 degrees between 17:21-18:24 UT. At approximately 18:12 UT embedded prominence material is visible near Position Angle 280 degrees. Upon reviewing the H-alpha data, it is likely that this is an arch prominence which erupts (EPL).
90d256
A CME from September 12, 1990, (94kB, mpeg). A CME can be seen erupting at Position Angle 160 degrees. The classic advancing loop can be seen moving away from the sun at 17:50-18:16 UT.
90d279
A CME from October 66, 1990, (502kB, Merged-GIF). POOF! A CME can be seen moving away from the sun between 270-315 degrees. It looks like a puff of smoke, but in this case it is a huge puff of ionized particles. It occurs from 18:58-19:45 UT.
90d293
A CME from October 20, 1990, (182kB, Merged-GIF). It's a bird! It's a plane! NO, it's a CME exploding away from the sun faster than a speeding bullet (~200km/sec), and way more powerful than a locomotive (2*10^8 kg). This sight can be seen at 300 degrees between 18:01-18:41 UT. Don't miss it!
90d298
A CME from October 25, 1990, (555kB, Merged-GIF). A huge CME can be seen leaving the sun between 17:20-18:05 UT. There is an abundance of prominence material exploding outward at position angle 300 degrees. The main advancement of the CME occurs is the same area, though the edges extend from 270-350 degrees.
91d038
A CME from February 7, 1991, (297kB, Merged-GIF). It is located at Position Angle 260 from 21:28 - 21:54 UT.
91d058
A CME from February 27, 1991, (224kB, mpeg). It is located at Position Angle 320 from 18:47 - 20:39 UT.
91d063
A CME from March 4, 1991, (94kB, mpeg). It is located at Position Angle 45-90 from 19:15 - 19:47 UT.
91d064
A CME from March 5, 1991, (124kB, mpeg). It is located at Position Angle 80 from 17:35 - 18:42 UT.
91d145
A CME from May 25, 1991, (235kB, mpeg). The first CME appears at Position Angle 280, from 17:16 - 17:55 UT. A second CME is visible over the north pole between Position Angles 280 in the northwest and 10 in the northeast, from 18:04 - 18:46 UT.
91d150
A CME from May 30, 1991, (139kB, mpeg). The CME appears at Position Angle 80 - 120 degrees. It occurs from 19:41 - 20:16 UT.
92d108
Two CME's, (176kB, mpeg), from April 17, 1992. The first appears to be an erupting prominence which occurs at position angle 65 from 19:00 - 19:32 UT. The second appears to be an exploding loop at position angle 110 from 20:18 - 20:31 UT. These were discovered by Duc Chu.
93d071
Vodka, a double-loop CME, (44kB, mpeg) from March 12, 1993. The CME has two loops: one at a position angle of 250 - 320 degrees, the other at a position angle of 280 - 305 degrees. The CME occurs from 17:47 - 18:06 UT. Often, CME's are named by their discover. This one is named after Cathy's dog.
95d023
A huge prominence eruption in H-alpha which occurred on January 23, 1995, (123kB, mpeg), from the time 17:43-19:35 UT. The event begins before our observing day started. It is centered near the Position Angle (PA) 75, measured counter-clockwise from the North. This region has been modified slightly to enhance contrast.
95d230
A loop/cavity CME, from August 18, 1995, (117kB, mpeg). This CME consists of a loop and cavity and has a bright central spot which moves out, but then falls back to the sun. This CME occurs at 17:13 - 17:55 UT at a position angle (measured counter-clockwise from the north) of 60-95 degrees.
An eruptive prominence, (128kB, mpeg) was simultaneously observed in H-alpha. Note that the dpm CCD saturated at the beginning of this event, and there may be an instrumental reflection to the north of the true event. Also note that post flare loops appear in the last image at 193004 UT.
95d247
An EP in H-alpha, from September 4, 1995, (170kB, mpeg) showing a loop structure.
95d290
An EP in H-alpha from October 17, 1995, (41kB, mpeg).
95d323
An EP in H-alpha, from November 19, 1995, (303kB, mpeg).
96d047
An EP in H-alpha from February 16, 1996, (89kB, mpeg).
96d126
A CME on May 5, 1996, (823kB, Merged-GIF). A brilliant CME is seen leaving the sun between position angles 90-120 degrees. Near position angle 120 degrees prominence material can be seen embedded in the CME. The event takes place from 18:30-19:45 UT. It will be known as the flower CME due to its tulip shape beginning around 19:22 UT.
96d158
An EP in H-alpha from June 6, 1996 , (347kB, mpeg) and in the Helium-I line, (556kB, Merged-GIF). The prominence is also seen in the MK3 coronal data. Image at 21:37UT
96d261
An AP in H-alpha from September 18, 1996, (305kB, mpeg). Note, it was very windy on this day, and hence there are many double exposures and blurry images.
96d269
A disappearing filament, in the Helium-I line from September 25, 1996 , (1.3M, Merged-GIF).
96d276 277 278
The evolution of prominence as seen in Helium-I over three days:
- October 2, 1996 , (585kB, Merged-GIF)
- October 3, 1996 , (386kB, Merged-GIF)
- October 4, 1996 , (608kB, Merged-GIF)
NOTE: Pay special attention to October 4, 1996, as you can see prominence material flowing along magnetic field lines to the southern polar region.
96d293
From October 19, 1996, an EP (420kB, Merged-GIF) in Helium-I line. The same in H-alpha (98kB, mpeg), and the associated CME (95kB, mpeg). The coronal data is marred by clouds during this event.
97d031
From January 31, 1997, an AP in Helium-I (597kB, Merged-GIF). The same prominence in H-alpha (424kB, mpeg), and the associated coronal activity (280kB, mpeg). There are two different "exposures" in this last movie loop, one emphasizing the outer corona, the other the inner. The coronal data is marred by insects during this event.
97d156
From June 5, 1997, an EP (87kB, mpeg) in H-alpha.
And an AF (688kB, Merged-GIF) in Helium-I, at approx. 20 degrees west/35 degrees south on the sun's disk, creating a spider-like formation. (See this full disk image for reference.) This continued on June 6, 1997, (708kB, Merged-GIF). The filament now appears less organized, and material moves from the center to either leg of the spider.
97d160
A CME from June 9, 1997, (900kB, Merged-GIF). A faint CME can be seen exploding off the sun at position angle 300 degrees. It can be seen between 19:53-20:01 UT. A classical CME usually has a visible advancing loop. This CME is peculiar in that it looks as if it is coming off sideways. That is, it looks like a side view of an advancing loop.
97d167
A CME from June 16, 1997, (720kB, mpeg). A slow moving CME can be seen at position angle 305 degrees. (Note: the MK3 is mispointed too far North until 21:19UT). The most obvious movement is that of the embedded prominence material slowly leaving the suns gravitational field. The event occurs from 19:53-23:11 UT. The H-alpha (394kB, mpeg) data shows the same slow moving prominence material.
97d206
A CME on July 25, 1997, (410kB, Merged-GIF). A CME was spotted at Position Angle 300 degrees. It occurs between 20:24-20:43 UT. The CME was also seen in Helium-I line (286kB, Merged-GIF). The Helium data shows that the CME originated at 55W/15N on the disk. Note the shock wave.
97d252
A CME on September 9, 1997, (665kB, Merged-GIF). A beautiful CME can be seen near position angle 320 degrees. There appears to be an abundance of prominence material embedded just behind the advancing loop. The event takes place from 19:07-20:26 UT.
97d262
An AP on September 19, 1997, (1M, Merged-GIF). This large prominence shows activity at PA 242-258 on the west limb.
97d272
A CME on September 29, 1997, (252kB, Merged-GIF). This CME is dedicated to Lee Lacey. He was instrumental in the beautiful images we see from the mk3 coronameter. The classic advancing loop can be seen from 17:47-18:38 UT. at position angle 90 degrees.
97d276
From October 3, 1997, an EP (1.2MB, gif) in H-alpha on the east limb at PA 50.
97d296
A CME on October 23, 1997, (1.2MB, Merged-GIF). At position angle 90 degrees the CME can be seen exploding away from the sun. A well defined cavity is seen throughout the event, with an abundance of prominence material embedded within it. The prominence material is interesting because it is moving away non-radially in a southeasterly direction. The entire event takes place from 20:26-21:42 UT.
97d328
A CME on November 24, 1997, (2.8MB, Merged-GIF). At position angle 110 degrees a very slow and faint CME can be seen exploding away from the sun. There appears to be two advancing loops, though there is actually only one CME. The event is in progress at the beginning of the observing period. Because of the image quality only those images between 17:35-21:20 UT. can be seen. The CME is also in at the end of 21:20 UT.
97d335
A CME on December 1, 1997, (206kB, Merged-GIF). At position angle 60 degrees this CME is very fast, so look quick! It occurs from 18:34-19:32 UT. It looks to be in progress when the observing period is over.
97d352
From December 18, 1997, an EP (255kB, Merged-GIF) in H-alpha on the east limb at PA 50-68.
97d362
From December 28, 1997, an EP (244kB, Merged-GIF) in H-alpha on the south-east limb at PA 132-140.
98d010
An AP event on 10 January 1998, (350kB, Merged-GIF). In H-alpha on the north-west limb at PA 306-317. This prominence is very large and active and grows in height during the day.
98d027
An impressive ERP on 27 January 1998, (731kB, Merged-GIF). In H-alpha is seen on the south-east limb at PA 115-133. Prominence material splits up high above the limb with some continuing outward and the rest falling back down to the sun.
98d055
A large CME on 24 February 1998, (987 kB, Merged-GIF). At position angle 240 degrees is seen here exploding away from the sun. The entire event takes place over 17:40-18:47 UT.
98d060
A beautiful CME on 1 March 1998, (1.2MB, Merged-GIF). At position angle 290 degrees can be seen blasting off the sun from 18:40-20:39 UT. An eruptive prominence can be seen following the advancing loop of the CME around the same time. The ERP is also seen in a movie in H-alpha (471kB, Merged-GIF).
98d064
An exciting double loop CME on 5 March 1998, (2.3 MB, Merged-GIF). The CME at position angle 230 degrees can be seen in progress at the start of the observing period at 17:44-20:37 UT. An abundance of prominence material is embedded in the second loop, before erupting into the cavity of the first loop. The associated ERP in H-alpha (474kB, Merged-GIF) can also be seen.
98d067
A triple CME on 8 March 1998, (1.3 MB, Merged-GIF). An exciting day on the sun! There are 3 CME's that can be seen. The 1st is at position angle 90 degrees. It is very faint, so look close. This event occurs from 18:21-18:54 UT. The 2nd CME is at position angle 300 degrees. Also faint, but a classical advancing loop is noticeable. This event occurs from 18:54-19:26 UT. Finally, the 3rd CME is located near position angle 110 degrees. There is a beautiful advancing loop followed by embedded prominence material. This event occurs from 19:14-19:58 UT. Enjoy!
98d072
A CME on 13 March 1998, (675kB, Merged-GIF). A CME at position angle 270 degrees can be seen blowing out away from the sun. There is a classic advancing loop followed by some embedded prominence material. The entire event occurs from 21:01-21:39 UT.
98d076
An ERP on 17 March 1998, (216 kB, Merged-GIF). A small ERP in H-alpha appears on the south-west limb at PA 257-258.
98d086
A CME on 27 March 1998, (1.3 MB, Merged-GIF). A beautiful double loop CME at position angle 200 degrees can be seen blasting off the sun. There appears to be an abundance of prominence material embedded in the second loop. The entire even takes place from 20:28-21:52 UT.
The ERP can be seen in this H-alpha movie (131kB, Merged-GIF) that runs from 20:52-21:31 UT. This ERP does not seem to be associated with the above CME, suggesting that the CME was a "backside" event.
98d094
A CME on 4 April 1998, (675 kB, Merged-GIF). This CME can be seen at position angle 260 degrees. The entire event takes place from 17:55-18:38 UT.
98d105
An ERP event on 15 April 1998, (355 kB, Merged-GIF). At PA 250-264 from 21:12 to 22:06 UT.
98d111
CMEs on 21 April 1998, (2.2 MB, Merged-GIF). There are two CME's to look out for. The first is at position angle 300 degrees from 17:52-19:54 UT. There is an abundance of prominence material following the advancing loop before erupting out into the cavity. The 2nd CME occurs from postion angle 90 to 150 degrees. It looks like a cloud burst as it explodes away from the sun. This event occurs from 19:51-20:40 UT.
Two ERPs on the same day. The first occurs at 16:41-17:53 UT at PA 319-329, and the second occurs at 17:38-19:34 UT at PA 286-304. Note: the annotation in the H-alpha data indicates April 22 -- it should be April 21.
98d166
There are two simultaneous CMEs on 15 June 1998, (1.3 MB, Merged-GIF). The most obvious is at position angle 125 degrees. There is an abundance of prominence material imbedded in this CME near its more northern "leg". The 2nd CME is dimmer and is located near the south pole. Both events occur from about 16:43-18:20 UT.
98d167
A large CME on 16 June 1998, (0.6 MB, Merged-GIF). On the west limb, extending from about 240 to 330 degrees PA. One can see embedded prominence material at about PA 248. The event is in the MK3 FOV from about 18:00 to 18:50 UT.
The associated ERP can be seen in H-alpha (130kB, Merged-GIF).
98d187
A small CME on 6 July 1998, (0.5 MB, Merged-GIF). On the west limb, just north of due west at PA 275 degrees. It lasts from about 19:00 to 19:30 UT.
98d192
A small CME on 11 July 1998, (0.4 MB, Merged-GIF). On the west limb, just north of due west at PA 272 degrees. It lasts from about 18:28 to 18:58 UT.
98d199
A CME on 18 July 1998, (0.3 MB, Merged-GIF). There is a very dim CME on the east limb. It lasts from about 17:00 to 17:24 UT.
98d217
A small CME on 5 August 1998, (0.6 MB, Merged-GIF). On the east limb, at ~78 degrees PA. It lasts from about 17:50 to 18:13 UT.
98d227
A CME on 15 August 1998, (0.6 MB, Merged-GIF). Very similar to that on 1998, doy 228 but not as well defined. It is centered at 68 degrees PA lasting from about 18:10 to 18:42 UT.
Speed of the front of the loop is near 580 km/sec. At 18:10 angular extent is from 43 to 94 degrees PA. At 18:03 angular extent is from 33(???) to 104 degrees PA. There also appears to be material flowing along the southern leg near the end of the CME.
98d228
A CME on 16 August 1998, (1 MB, Merged-GIF). A beautiful expanding loop CME on the east limb, centered around 60 degrees PA. It lasts from about 17:37 to 18:45 UT.
Speed of the front of the loop is near 770 km/sec. At 17:40 angular extent is from 45 to 75 degrees PA. At 18:03 angular extent is from 30 to 104 degrees PA. There appears to be quite a bit of material flowing along the southern leg, seen in mk3 FOV beginning at 18:00 until 18:47.
98d229
Two CMEs on 17 August 1998, (1 MB, Merged-GIF). This is the first of two CMEs which occur at the same location. It is in the mk3 fov from 18:16 to 18:43 at PA 45 degrees, fairly narrow width, from 35 to 55 degrees PA. Speed is dificult to estimate.
Second CME occurs at a time when patches of clouds were passing by the observatory. So details may be incorrect. CME is in mk3 fov from 21:16 to 21:30 at PA 46 degrees. Width at 21:21 extends from 34 to 59 degrees PA. Width at 21:30 extends from 30 to 66 degrees PA. Speed is difficult to check, seems fast, 800 km/sec.
98d231
A large, fast CME on 19 August 1998, (0.5 MB, Merged-GIF). It is seen in mk3 FOV from 21:41 to 21:50 at PA 53 degrees. Width at 21:44 extends from 37 to 75 degrees PA. Width at 21:50 extends from 30 to 75 degrees PA. Speed estimate, fast, >1200km/sec.
98d242
A CME on 30 August 1998, (1 MB, Merged-GIF). A slow moving CME is seen in mk3 FOV from 17:15 to 18:29 at PA 306 degrees (upper right). Width extends from 292 to 320 degrees PA.
98d280
A CME on 7 October 1998, (0.6 MB, Merged-GIF). A small, narrow CME is seen in mk3 FOV from 17:47 to 18:31 at PA 125 degrees (lower left). Width extends from 119 to 130 degrees PA.
98d282
CMEs on 9 October 1998, (0.8 MB, Merged-GIF). There are actually 2 CMEs on this day. Only the first one is shown. In the first one, all one can see is a huge prominence eruption. There is no classic loop front at all. It is first seen at 18:46 at PA 51 and is in the mk3 fov until 19:30. An estimated speed for the prominence material of 342km/sec.
Second is hard to see in the late day noise. It begins at 21:06 at PA 99. It is in the mk3 fov until 21:26 (?) very hard to see in the late day noise. Speed estimate 513 km/sec.
98d352
A CME on 18 December 1998, (1.2 MB, Merged-GIF). This event occurs in the NE quadrant of the disk and is visible in H-Alpha and less so in the HeI dataset. It begins at 17:29 UT and lasts until approximately 19:19 UT. Clouds decreased contrast on the disk but it is possible to see detail.
98d353
A CME on 19 December 1998, (0.4 MB, Merged-GIF). This CME is in progress at beginning of observing day and is visible until 18:07 UT. Prominence material can be seen following a radial path outward at PA 224. Approximate width of the CME is 15 degrees.
99d020
A fast CME on 20 January 1999, (0.9 MB, Merged-GIF). Very large CME centered at PA 64 begins at 18:42 UT and remains visible in the MK3 field of view until approximately 19:43 UT. This event appears to have a LOOP/CAVITY/CORE structure but the prominence (CORE) material is not very distinct. The width of the LOOP feature is approximately 45 degrees. This event affects a large area because the magnetic field lines associated with the LOOP appear to push out the outer edges of the helmet streamer containing it. Because it is visible in the MK3 FOV for only one hour suggests a fast moving event.
99d036
A CME on 5 February 1999, ( 2.3MB, Merged-GIF). Large, slower moving CME with prominence material centered at PA 230. There is a distinct core (prominence) and cavity feature as well as a less distinct loop feature. The width of the outer loop is approximately 46 degrees at it's widest. As the core rises, the CME appears to push against the surrounding corona, widening the cavity region. The core first becomes visible in the MK3 FOV at 19:34 UT and leaves it by 22:29 UT.
99d103
A flare on 13 April 1999, (2.1 MB, Merged-GIF). This two-ribbon flare begins in H-Alpha data at approximately 17:37 UT. Activity remains visible until the end of the observing day. There appears to be material moving eastward along the surface of the disk. This motion is confirmed by CHIP velocity data which suggests that material is moving away from the observer. This is consistent with the idea that material is moving toward the limb with a large velocity component directed away from the observer.
99d129
Bright CME on 9 May 1999, (1.0 MB, Merged-GIF). Very bright, fast CME visible in MK3 from 18:04-18:41 UT and is centered at PA 304 degrees. Approximate width is 33 degrees. This event is very bright in the MK3 direct images and has a nice LOOP/CAVITY/CORE structure. The outer loop seems to travel northward, pushing the helmet streamer to the north as it travels outward. Prominence material can be seen following the cavity. The entire event seems pulled or deflected northward a bit as it travels outward.
99d168
A CME on 17 June 1999, (4.9 MB, Merged-GIF). This rather large sized file is included here to show one of the first CME's observed in the new MK4 k-coronameter. This CME is centered at PA 306 degrees and is visible in MK4 from 17:19-19:03 UT. According to MK3 logs, this event is visible from 17:30-17:53 UT, so MK4 observed the events for over an hour longer than in MK3 and more fine detail can be seen. There is a clear LOOP structure and a somewhat complicated looking CAVITY structure.
99d299
A CME on 26 October 1999, (2.7 MB, Merged-GIF). This event is visible from 21:18 until 22:28 UT on the west limb. It appears to be a double loop structure.
99d323
A CME on 19 November 1999, (3.6 MB, Merged-GIF). Here one can see a faint loop, presumably a bit out of the plane of the sky, accompanied by a prominence in the south-west.
00d359
A CME on 24 December 2000:
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