HELIOS no. 72 08. March 2004
HELIOS no. 72
08. March 2004
This Helios Newsletter continues a series
of newsletters under the same name as above and that were issued as the newsletter of the
Solar Section of the Norwegian Astronomical Society.
Helios no. 1 was issued on 2nd May 1979
and ended almost simultaneously as I resigned as the leader of that section, i.e.
in August 1989.
Now I bring it to life again, started where I left it. (01Mar1998)
Comments? Post them!
HELIOS -
SOLAR NEWS
CV-Helios Network: 7418 observations from 49 observers in 2003
Records set for every month except January.
Details in the Annual Report to be issued 01m April 2004.
From PRF 1475
Extracts from Preliminary Report and Forecast, SEL,
Boulder, CO. USA:
SWO
PRF: Online Weekly in Adobe Acrobat(R) format
HELIOS 72
AUGUST - DECEMBER 2003
Activity 13 August - 30 December 2003
===========================================================
| Space Weather Highlights SWO PRF 1459 |
| 11 - 17 August 2003 19 August 2003 |
| Solar activity was at very low to low levels. The period began on 11 August with very low level activity. For |
| the remainder of the period (12 – 17 August), activity was at low levels with numerous C-class flares from |
| Region 431 (S13, L=194, class/area Ekc/500 on 14 August). Region 431 was the most active region during the |
| period and produced numerous C-class flares on 12 – 14 August. This Region exhibited rapid growth to over |
| 500 millionths on 13 – 14 August and developed a beta-gamma-delta magnetic configuration. The largest flare |
| of the period was a long duration C7 from Region 431 on 15 August at 0018 UTC. Region 431 entered a |
| gradual decay phase on 15 – 17 August and simplified to a beta-gamma magnetic configuration on 17 August. |
| Although in decay, Region 431 was the source of numerous C-class flares on 15 – 17 August. Region 424 |
| (S18, L=290, class/area Ekc/760 on 06 August) was in steady decay before it rotated beyond the west limb on |
| 14 August. |
| Space Weather Highlights SWO PRF 1460 |
| 18 - 24 August 2003 19 August 2003 |
| Solar activity was at very low to low levels. The period began on 18 August with low level activity. |
| Moderate activity was observed on 19 August with two M-class flares from Region 431 (S13, L=194, |
| class/area/mag Ekc/500/Bgd on 14 August). The first M-flare was an impulsive M2/1n at 0759 UTC. |
| The second M-flare was an M2.7/2f at 1006 UTC with associated Type II (614 km/s), Type IV radio |
| sweeps and a CME that was not Earth directed. Activity on 20 – 24 August ranged from very low to |
| low levels. A C4 flare occurred on 21 August from Region 431 beyond the west limb and a C1 flare |
| occurred on 24 August from Region 436 (N07, L=88, class/area/mag Esi/170/B on 21 August). |
| Region 431 continued its decay early in the period and rotated beyond the west limb on 21 August. |
| Region 436 showed some growth and increasing magnetic complexity on 22 August but stabilized by |
| 23 August. The only activity from this region has been minor C-class flares. |
| Space Weather Highlights SWO PRF 1461 |
| 25 - 31 August 2003 02 September 2003 |
| Solar activity was at low levels. Region 436 (N07, L=89, class/area Eac/230 on 22 August) was the most |
| active region during the period and produced the largest flare, a C4/1n at 1559 UTC on 26 August. |
| Region 436 was in gradual decay at the beginning of the period and rotated beyond the west limb on 29 |
| August. On 28 August, a C1 flare occurred at 1335 UTC with an associated Type II radio sweep (800 |
| km/s). There were two potential sources of the C1/Type II: one from a flare located in Region 445 (N03, |
| L=016, class/area Dao/110 on 27 August) and the second from a flare on the southeast limb (S10). On 30 |
| – 31 August, Region 442(S12, L=025 class/area Dso/160 on 23 August) produced two long duration C1 |
| flares. The first one occurred at 0514 UTC on 30 August and the second occurred at 0622 UTC on 31 |
| August. The second C1 was associated with a CME off the southwest limb, but did not have an Earth |
| directed component. |
| Space Weather Highlights SWO PRF 1462 |
| 01 - 07 September 2003 09 September 2003 |
| Solar activity ranged from very low to low levels. Activity was very low on 01 – 03 September and |
| again on 06 September while low levels were observed on 04, 05, and 07 September. The largest flare |
| of the period was a C5/Sf flare and filament eruption on 07 September at 1407 UTC from Region 450 |
| (S16, L=301, class/area Fso/120 on 03 September). LASCO imagery indicates the CME associated |
| with this flare was off to the southwest. All of the sunspot regions on the visible disk during the |
| summary period were relatively small and magnetically simple. The only region to reach a white light |
| area of 200 millionths was region 453 (S23, L=323, class/area Dso/200 on 06 September). |
| Space Weather Highlights SWO PRF 1463 |
| 08 - 14 September 2003 16 September 2003 |
| Solar activity ranged from very low to low levels. The period began with very low level activity on 08 |
| - 10 September and again on 12 September. Low level activity was observed on 11 September and 13 |
| -14 September. Up until 12 September, all of the sunspot regions on the visible disk were relatively |
| small and magnetically simple. Late on 11 September, a long duration B7 X-ray enhancement |
| occurred at 2237 UTC and was correlated with the two disappearing solar filaments. The first DSF |
| was five-degrees long and lifted off around 2100 UTC in the vicinity of S25E05. The second DSF |
| followed the first and was along the same inversion line. This DSF was ten-degrees long and lifted off |
| in the vicinity of S18E15. LASCO C2 imagery indicates a partial halo CME associated with the two |
| DSF's. Region 456 (S07, L=221, class/area Dai/240 on 13 September) was in a slow gradual growth |
| phase for most of the period and by 12 September had developed some polarity mixing in the |
| intermediate spots. A beta-gamma-delta magnetic configuration developed for a brief period on 13 |
| September. Activity from Region 456 consisted of a few mid level C-class flares, including the |
| largest flare of the period, a C4/Sf on 14 September at 0127 UTC. |
| Space Weather Highlights SWO PRF 1464 |
| 15 - 21 September 2003 23 September 2003 |
| Solar activity ranged from low to moderate levels. The period began on 15 September with low level |
| activity. Region 456 (S07, L=221, class/area Dai/240 on 13 September) produced an M1 flare at 2244 |
| UTC on 16 September from just beyond the west limb. Activity for the remainder of the period (17 – |
| 21 September) was at low levels. Region 461 (N13, L=159, class/area Dao/250 on 18 September) |
| developed on 16 September and grew quickly in the over the next three days. This region produced |
| some minor C-class flares before it rotated beyond the west limb on 20 September. Region 464 (N03, |
| L=353, class/area Eko/460 on 21 September) rotated onto the visible disk on 20 September and |
| activity from this region consisted of minor C-class flares. |
| Space Weather Highlights SWO PRF 1465 |
| 22 - 28 September 2003 30 September 2003 |
| Solar activity ranged from very low to low levels. Activity was at low levels for the entire period |
| except the first day, 22 September when it was at very low levels. Region 464 (N04, L=356, |
| class/area Fki/610 on 26 September) was a large, moderately complex region that developed a betagamma |
| configuration on 22 September and maintained this configuration throughout the period. The |
| majority of activity during the period was from Region 464. On 24 September, Region 464 produced |
| numerous minor C-class flares including a C5/1f flare at 0717 UTC. This region also produced the |
| largest event of the period, a long duration C6/Sf flare on 28 September at 1558 UTC. A 20-degree |
| filament near S19W23 erupted off the disk on 24 September with a rather faint CME observed on |
| LASCO imagery following the eruption. |
| Space Weather Highlights SWO PRF 1466 |
| 29 September - 05 October 2003 07 October 2003 |
| Solar activity ranged from low to moderate levels. The period began with low level activity on 29 - 30 |
| September with most of the activity originating from Region 464 (N04, L=356, class/area Fki/610 on |
| 26 September). Region 464 maintained a beta-gamma magnetic configuration until it rotated around |
| the west limb. Activity reached moderate levels on 01 October with an M1/1f flare from Region 464 |
| at 0451 UTC. Activity returned to low levels on 02 - 03 October with Region 464 producing a C7/1f |
| flare at 0656 UTC on 02 October and Region 471 (S08, L=222, class/area Eac/210 on 04 October) |
| produced minor C-class flares on 03 October. Region 471 rotated onto the visible disk on 30 |
| September and by 03 October had shown two distinct bipolar magnetic configurations, suggesting two |
| regions. Thus, on 03 October this spot group was split into two distinct regions. Region 473 (S09, |
| L=237, class/area Cso/140 on 04 October) was assigned to the leading spots and Region 471 was |
| assigned the trailing spots. Region 471 developed a beta-gamma configuration on 02 October and |
| maintained this moderate complexity for the remainder of the period. After Region 464 rotated |
| beyond the west limb on 03 October, Region 471 became the source of the majority of flare activity. |
| Moderate level activity was observed on 04 October with an M1/Sf from Region 471 at 1547 UTC. |
| The period ended with numerous B and C-class flares from Region 471 on 05 October. |
| Space Weather Highlights SWO PRF 1467 |
| 06 October – 12 October 2003 14 October 2003 |
| Solar activity ranged from very low to low levels. The period began with very low level activity |
| on 06 October. Low levels were observed on 7 October due to minor C-class activity from |
| Region 471. Region 471 (S08, L=222, class/area Eac/270 on 08 October), a moderately complex |
| group, was the largest and most active region on the visible disk this period and was responsible |
| for the majority of activity observed. Low level activity was again observed on the 8th and 10th |
| due to minor C-class flares from Region 471. Very low levels were observed during the |
| remainder of the period with no significant developments or activity noted on the disk or limb. |
| Space Weather Highlights SWO PRF 1468 |
| 13 - 19 October 2003 21 October 2003 |
| Solar activity ranged from very low to high levels. An almost spotless visible disk resulted in very |
| low levels from 13 - 17 October. There were a few spot groups visible during this period, but all were |
| small with alpha or simple beta magnetic configurations. Solar imagery on the 17th hinted strongly |
| that one or more considerably complex regions were rotating around the east limb. Occasional longduration |
| B-class activity on the 17th also lent credence to the probability that activity levels would |
| soon increase. The first of these active regions rotated into view on 18 October and was numbered as |
| Region 484 (N05, L=351, class/area Dac/240 on 19 October). Activity increased to low levels on the |
| 18th as this compact, rapidly developing region produced several low C-class flares. A halo CME |
| was also observed on the 18th, originating from behind the southeast limb. Activity increased to high |
| levels on 19 October. Region 484 produced an X1/1n flare at 19/1650 UTC. The flare was |
| accompanied by strong radio bursts, a Type II radio sweep, and a coronal mass ejection. Two M1 |
| flares also occurred in this region at 19/0626 UTC and 19/1926 UTC. Region 484 grew dramatically |
| during this 24-hour period and developed a strong delta configuration in a spot group containing over |
| 1000 millionths of white light areal coverage. (Note: At the time of this writing, Region 484 was still |
| in growth phase, exceeding 1600 millionths in size. Activity on the SE limb suggests that another |
| considerably active region is about to rotate into view.) |
| Space Weather Highlights SWO PRF 1469 |
| 20 - 26 October 2003 28 October 2003 |
| Solar activity ranged from moderate to high levels. Moderate levels were observed on the 20th and 21st due to low M-class |
| activity in Region 484 (N04, L=354, class/area Ekc/1750 on 23 October). On 22 October, Region 486 (S15, L=282, |
| class/area Fkc/2200 on 25 October) rotated onto the visible disk producing several M-class flares including an M9 at 2007 |
| UTC. An Earth directed CME was also observed on the 22nd originating in Region 484. High levels were observed on the |
| 23rd with Region 486 producing two major flares – an X5/1b at 0835 UTC and an X1/1n flare at 2004 UTC. The X5 was |
| the largest event of the period and had an associated Type II radio sweep (967 km/s) and a CME that was not Earth directed. |
| Activity on 24 October was at high levels due to an M7/1n flare at 0254 UTC. Moderate level activity on 25 October |
| included two long duration M1 flares - an M1/2n at 0446 UTC from Region 486 and an M1/Sf at 0553 UTC from Region |
| 484. The latter event was associated with a Type II radio sweep. Activity on the 26th returned to high levels with two long |
| duration X1 flares. The first event was an X1/3b from Region 486 that occurred at 0654 UTC and was associated with |
| Type II (1302 km/s) and Type IV radio sweeps. The second event was an X1/1n from Region 484 that occurred at 1819 |
| UTC with an associated Type II (950 km/s) and a partial halo CME off to the west. |
| Space Weather Highlights SWO PRF 1470 |
| 27 October - 02 November 2003 04 November 2003 |
| Solar Activity ranged from moderate to high levels. Activity on 27 – 29 October was at high levels with most |
| of the activity originating in Region 486 (S16, L=285, class/area Fkc/2610 on 29 October) and Region 488 |
| (N08, L=289 class/area Fkc/1750 on 30 October). An M6/Sf occurred on 27 October from Region 486. On |
| 28 October, Region 486 produced one of the largest flares of this solar cycle, an X17/4B proton flare peaking |
| at 1110 UTC on the 28th. This flare had intense radio bursts including a 245 MhZ burst near 500,000 sfu, a |
| Tenflare of 13,000 sfu and Type II (1250 km/s) and Type IV radio sweeps. An extremely fast (near 2000 km/s), |
| earthward directed halo CME was observed on SOHO/LASCO imagery. On the 29th, Region 486 produced |
| another major flare, an X10 at 29/2049 UTC. Once again, intense radio emissions accompanied this flare, |
| including a 360,000 sfu burst at 245 MHz, a 2500 sfu Tenflare, and strong Type II/IV radio sweeps. A very fast |
| (over 1900 km/s) earth-directed full halo CME was observed on LASCO imagery. Throughout the period |
| Region 486 maintained its tremendous size and magnetic complexity, with strong delta configurations. On 29 |
| October, the sunspot area of Region 486 grew to 2610 millionths making it the largest spot group observed to |
| date in this solar cycle. Moderate level activity was observed on 30 October – 01 November due to minor Mclass |
| flares from Regions 486 and 488. Region 484 (N04, L=354, class/area Ekc/1750 on 22 October) rotated |
| beyond the west limb on 30 October. Region 488 developed very rapidly near center disk on 27 October and |
| exhibited rapid growth over the next three days, reaching 1750 millionths in size. Despite its impressive size |
| activity from Region 488 consisted of mainly minor M-class events. At the end of the period Region 486 |
| produced another major event, an X8/2b flare at 1725 UTC on 02 November. This flare was associated with a |
| Tenflare of 7,700 sfu, a 245 MhZ radio burst of 24,000 sfu, Type II (1691 km/s) and Type IV (70 min.) radio |
| sweeps. LASCO imagery indicated a halo CME associated with the X8. At the time of this report issue (04 |
| November) Regions 486 and 488 produced a couple of X-class event on 03-04 November; an X3/2b from |
| Region 486 on the 3rd, an X2/2f from Region 488 on the 3rd, and an X17-plus at 1953 UTC (saturation ended, |
| exact peak not known) on the 4th. The X17-plus flare saturated the GOES X-ray instrument for 12 minutes. |
| Space Weather Highlights SWO PRF 1471 |
| 03 November – 09 November 2003 12 November 2003 |
| Activity ranged from very low to high levels. Region 486 (S16, L=285, class/area Fkc/2610 on 29 |
| October) continued to produce major flare activity and Region 488 (N08, L=289, class/area Fkc/1750 |
| on 30 October) contributed a few major flares of its own. High level activity was observed on 03 |
| November with an X2/Sf at 0130 UTC and an X3/2b at 0955 UTC, both from Region 488. Both of |
| these flares were associated with Tenflares, 245 Mhz radio bursts and Type II and Type IV radio |
| sweeps. The most significant flare of the period occurred on 04 November from Region 486. An Xray |
| flare began at 1931 UTC and saturated the GOES X-ray sensor at the X17.4 level for 12 minutes |
| (1944 to 1956 UTC). Analysis of available data yields an estimated peak X-ray flux of X28 with a |
| peak time at 1950 UTC, making it one of the largest flares ever measured on GOES/XRS. Associated |
| with the X28 were intense radio busts at all frequencies, including a Tenflare of 20,000 sfu, a 245 Mhz |
| radio burst of 4,800 sfu, and Type II and Type IV radio sweeps. Indications of an extremely fast |
| moving (2301 km/s) full halo CME were seen on LASCO imagery. By 05 November, Region 486 |
| rotated beyond the west limb but still produced an M5/Sf at 1052 UTC. Activity for the remainder of |
| the period, 06 – 09 November, decreased dramatically to very low levels after nearly three weeks of |
| intense solar activity. A full halo CME was observed in LASCO imagery late on 06 November, but |
| was determined to be back-sided. A combination of observed CMEs and long duration low levels Xray |
| enhancements suggest continued activity from the Regions 484, 486, and 488 on the back-side. |
| Space Weather Highlights SWO PRF 1472 |
| 10 - 16 November 2003 18 November 2003 |
| Solar activity ranged from low to moderate levels. The summary period began on 10 November with low level |
| activity. Region 498 (S04, L=170, class/area Dao/220 on 11 November) exhibited a brief period of rapid |
| growth on 10 –11 November. During this rapid growth period, Region 498 produced moderate level activity |
| with an M1/Sf flare at 1351 UTC on 11 November. Associated with this M1 flare was a Tenflare, a Type II |
| (481 km/s) radio sweep, and a large CME, which was mostly westward directed and measured approximately |
| 1100 km/s plane of sky speed. Activity returned to low levels on 12 November. As Region 498 rotated beyond |
| the west limb on 13 November, new Region 501 (N03, L=002 class/area Dki/380 on 16 November) rotated |
| onto the east limb as a magnetically complex group with a beta-gamma-delta configuration. Region 501 |
| produced two M1 flares on 13 November, one at 0501 UTC and the other at 0929 UTC. The latter M1 flare |
| was a long duration event with an associated Type II radio sweep (595 km/s). From 14 – 16 November, the |
| region produced low level activity with numerous C-class flares, the largest of which was a C7/Sf at 1039 UTC |
| on 16 November. |
| Space Weather Highlights SWO PRF 1473 |
| 17 – 23 November 2003 25 November 2003 |
| Solar activity ranged from low to high levels. The period began with moderate level activity on 17 – |
| 19 November. Region 501 (N03, L=002, class/area Dhc/410 on 18 November) produced the first of |
| nine M-class flares at 0905 UTC on 17 November, an M4.2/1n flare. This flare was accompanied by |
| a Type II (445 km/s) radio sweep and a CME with an estimated plane of sky speed of 1085 km/s. On |
| 18 November, a pair of M3/2n flares was observed from Region 501 with peak flux times at 0752 and |
| 0831 UTC. Strong radio bursts, a Tenflare, a Type IV, and two separate Type II radio sweeps were |
| associated with the M3s. Simultaneous with the first flare, a fourteen-degree filament to the south and |
| west of Region 501 erupted at 0716 UTC. LASCO imagery depicted a full halo CME as a combined |
| result of these events. An impulsive M1 flare was observed from Region 501 on 19 November. High |
| level activity occurred on 20 November due to an M9.6/2b flare at 0747 UTC and an M5.8 flare at |
| 2353 UTC. The M9 was associated with a Type IV radio sweep, a 9700 sfu Tenflare, and a faint full |
| halo CME. New regions 507 (N10, L=295, class/area Eki/890 on 19 November) and 508 (S20, |
| L=286, class/area Dko/680 on 20 November) rotated onto the east limb on 18 and 19 November |
| respectively. Regions 507 and 508 are thought to be old Region 488 and 486, respectively. Both of |
| these regions appear to have maintained at least some of their complex magnetic structure during their |
| transit on the backside of the Sun; although old Region 486 has decayed considerably. Region 507 |
| has shown some mix polarities and a beta-gamma-delta configuration while Region 508 had a betagamma |
| configuration for most of the period. An M4.5 event was observed at 1011 UTC on 18 |
| November and appears to have originated from Region 508 just prior to it rotating onto the disk. |
| Activity on 21 – 23 November decreased to low levels as Regions 501, 507 and 508 exhibited some |
| level of decay and simplification in magnetic complexity. Region 501 simplified to a beta-gamma |
| magnetic configuration on 22 November. |
| Space Weather Highlights SWO PRF 1474 |
| 24 - 30 November 2003 02 December 2003 |
| Solar activity was at low levels during the summary period. Region 508 (S20, L=286, class/area Dko/680 on |
| 20 November) was the most active region during the period. This region contained moderate magnetic |
| complexity with a beta-gamma configuration and produced twenty C-class flares during the period. It also |
| produced the largest flare of the period on 27 November, a C9/Sf at 0820 UTC. Moderately complex Region |
| 501 (N18, L=002 class/area Dhc/410 on 18 November) was in gradual decay as it approached the west limb, |
| and made a quiet exit off the visible disk on 26 November. Region 507 (N10, L=295, class/area Eki/890 on 19 |
| November), though in decay phase, exhibited considerable size and complexity throughout the period. A weak |
| delta configuration persisted; however, activity was limited to very isolated low C-class flares. Late in the |
| period, Region 517 (S07, L=145, class/area Cao/160 on 30 November) rotated onto the visible disk and |
| produced occasional C-class activity. This region continues in a slow growth phase. There have been a |
| number of other smaller regions on the visible disk during the summary period, all of which are unremarkable |
| and simple in magnetic structure. At the time of this report issue, long duration X-ray activity and a strong |
| eruption was observed to occur from near Region 508 on the southwest limb. |
| Space Weather Highlights SWO PRF 1475 |
| 01 - 07 December 2003 09 December 2003 |
| Solar activity was at low to moderate levels this period. The period began at low levels with Region 508 (S17, |
| L=284, class/area Ekc/480 on 23 November) as the likely source of the modest C-class activity. Region 508, |
| though in decay, maintained considerable complexity as it rotated around the west limb on 01 December. |
| Activity increased to moderate levels on 02 December with a number of X-ray events occurring on the |
| southwest limb. The most likely source of this activity was Region 508. The first of these limb events was a |
| C7 flare that occurred at 02/0948 UTC, followed by a significant long duration X-ray enhancement that peaked |
| at 1145 UTC. LASCO and EIT imagery observed a full halo CME from this event, with a measured mean |
| plane-of-sky speed at 1234 km/s. Two M1 flares were also observed from this region, at 1308 and 2300 UTC. |
| Activity returned to low levels from 03 - 05 December, with occasional weak C-class flares observed. The |
| frequency of the C-class activity increased late on 05 December with majority of the activity originating in |
| Region 510 (S23, L=228, class/area Dai/150 on 28 November). Activity increased to moderate levels on the |
| 6th with Region 510 producing an M1 and M2 flare at 1120 UTC and 1546 UTC. Activity returned to low |
| levels on 07 December. |
| Space Weather Highlights SWO PRF 1476 |
| 08 - 14 December 2003 16 December 2003 |
| Solar activity was at very low to low levels this period. Activity was at very low levels from 08 - 13 |
| December and was marked by numerous minor B-class flares. Activity increased to low levels on 14 |
| December with two C-class flares from Region 522 (N16, L=007 class/area Cso/30 on 14 December). |
| The largest of these two C flares was a C2 at 2340 UTC on 14 December. Region 522 appeared on |
| the northwest disk on 13 December with a beta magnetic configuration. The largest region on the disk |
| during the period was Region 520 (N02, L=009, class/area Dso/140 on 14 December. This region |
| developed a beta magnetic configuration on 14 December but has yet to produce activity above the |
| B-class level. |
| Space Weather Highlights SWO PRF 1477 |
| 15 – 21 December 2003 23 December 2003 |
| Solar activity was at very low to low levels this period. The period began on 15 December with very |
| low level activity. From 16 – 21 December, activity was primarily at low levels. Region 525 (N09, |
| L=291, class/area Dsi/130 on 21 December) underwent slow growth in both size and complexity |
| during the period, and developed a beta-gamma magnetic configuration on 21 December. This region |
| represents the third rotation of old Region 488 (previous rotation was Region 507). The majority of |
| activity during the period came from Region 525, including two C8/Sf flares on 17 and 18 December, |
| and the largest flare of the period, a C9/Sf at 0809 UTC on 19 December. Region 528 (N09, L=259, |
| class/area Fho/390 on 21 December) rotated onto the visible disk on 18 December, and exhibited |
| steady growth through most of the period. On 21 December, Region 528 was a moderate size betagamma |
| spot group, producing occasional C-class activity. |
| Space Weather Highlights SWO PRF 1478 |
| 22 - 28 December 2003 30 December 2003 |
| Solar activity was at very low to moderate levels during the period. The largest, and most active |
| region was Region 528 (N10, L=261, class/area Fkc/740 on 25 December). This region exhibited |
| steady areal growth early in the period and a slow steady decay after 26 December. Activity from |
| Region 528 consisted of nineteen C-class flares including two long duration events, a C5/Sf at 0825 |
| UTC on 25 December and a C7/1f at 1038 UTC on 26 December. A weak partial halo CME was |
| associated with the long duration C5 on the 25th. This region also produced the largest event of the |
| period, an M1/1n at 1928 UTC on 26 December. The other region of interest during the period was |
| Region 525 (N10, L=291, class/area Dsi/130 on 21 December). This region produced six C-class |
| flares before it dissipated on the disk on 26 December. |
...
There are 2 New members since 19. Aug. 2003 / Helios 71:
CV-Helios Network |
Member no. |
Name |
Country |
Enter date |
| CV-147 | KATIE SMITH | UNITED KINGDOM | 03. OCT.03 |
| CV-148 | CLYDE MORRIS | UNITED KINGDOM | 28. DEC.03 |
Helios no. 73 will be issued 01. Apr. 2004
CV-Helios Network 08 mar 2004