The geomagnetic field was quiet to active on November 8. Solar wind speed at SOHO ranged between 368 and 432 km/sec, averaging 390 km/sec (-27 compared to the previous day). The high latitude magnetometer at Andenes recorded quiet to major storm levels. The above 10 MeV proton flux was at background levels at the end of the day. The total field of the interplanetary magnetic field increased after 09:40 at ACE. The Bz component of the IMF swung southwards after 17h and a geomagnetic disturbance began afterwards. The source of this disturbance is uncertain.
Solar flux density measured at 20h UT on 2.8 GHz was 231.0 - increasing 17.4 over the previous solar rotation. (Centered 1 year average SF at 1 AU - 183 days ago: 185.16. In comparison SC24 peaked on June 28, 2014 at 145.50. Current SC25 peak: 185.16 on May 10, 2024). The Potsdam WDC planetary A index was 10 (STAR Ap - based on the mean of three hour interval ap indices: 10.1). Three hour interval K indices: 31122243 (planetary), 21222333 (Boulder), 43011364 (Andenes).
The background x-ray flux is at the class C2 level (GOES 16).
At the time of counting spots (see image time), spots were observed in 14 active regions using 2K resolution (SN: 390) and in 13 active regions using 1K resolution (SN: 278) SDO/HMI images.
AR 13878 [N16W77] decayed with the main
penumbra fragmenting into smaller penumbrae.
AR 13879 [N15W55] was quiet and stable.
AR 13880 [S14W49] was quiet and stable.
AR 13881 [S09W70] decayed slowly and was mostly
quiet.
AR 13883 [S06W21] decayed slowly losing spots and area. A small
magnetic delta is still present and M class flaring is possible.
AR 13884 [S07W01] was quiet and stable.
AR 13886 [S05E11] produced several C flares. The region has many
small and tiny spots.
AR 13889 [S10E54] produced C flares. M class flaring is likely.
Spotted regions not observed (or interpreted
differently) by SWPC/USAF:
S10314 [S11E02] decayed slowly and quietly.
S10323 [S07W33] developed slightly in the trailing spot section.
S10324 [S12E12] was mostly quiet and stable.
S10330 [S15E41] was quiet and stable.
S10338 [N22E07] was quiet and stable.
New region S10339 [S11E63] was numbered as a separate region just
east of AR 13889.
C2+ flares
| Magnitude | Peak time (UT) | Location | Source | Recorded by | Comment |
| C5.4 | 00:32 | S06W09 | 13883 | GOES16 | |
| C6.1 | 01:06 | S06W09 | 13883 | GOES16 | |
| C4.0 | 02:00 | 13886 | GOES16 | ||
| C6.2 | 02:34 | S06W09 | 13883 | GOES16 | |
| M1.5/1N | 03:01 | S07W05 | 13883 | GOES16 | |
| M1.3 | 03:07 | 13883 | GOES16 | ||
| C5.8 | 03:34 | S08E23 | 13886 | GOES16 | |
| C3.1 | 04:48 | S08E23 | 13886 | GOES16 | |
| C3.1 | 05:17 | 13883 | GOES16 | ||
| C3.0 | 05:30 | 13886 | GOES16 | ||
| C3.5 | 05:44 | 13883 | GOES16 | ||
| C3.8 | 06:31 | S07W08 | 13883 | GOES16 | |
| C5.2 | 07:46 | S06W11 | 13883 | GOES16 | |
| C3.4 | 08:41 | 13883 | GOES16 | ||
| C3.1 | 08:50 | 13878 | GOES16 | ||
| C5.7 | 10:42 | N14W84 | 13887 | GOES16 | simultaneous flare in AR S10314 |
| C4.2 | 11:18 | 13889 | GOES16 | ||
| C5.9 | 11:24 | 13883 | GOES16 | ||
| C4.0 | 12:43 | 13889 | GOES16 | ||
| C5.3 | 12:58 | S10E24 | S10324 | GOES16 | |
| C3.0 | 14:02 | 13883 | GOES16 | ||
| C3.6 | 15:45 | 13883 | GOES16 | ||
| C2.7 | 17:20 | 13889 | GOES16 | ||
| C2.6 | 17:49 | 13886 | GOES16 | ||
| C2.5 | 18:19 | 13886 | GOES16 | ||
| C4.7 | 19:18 | 13883 | GOES16 | ||
| C5.4 | 19:26 | 13883 | GOES16 | ||
| C2.6 | 20:36 | 13886 | GOES16 | ||
| C2.6 | 20:57 | 13886 | GOES16 | ||
| C2.6 | 22:24 | 13881 | GOES16 | ||
| C6.7 | 23:47 | 13889 | GOES16 | ||
| C7.4 | 00:08 | 13889 | GOES16 |
November 6-8: No obviously Earth directed CMEs were observed.
[Coronal
hole history (since October 2002)]
[Compare today's report to the situation one solar rotation ago:
28 days ago
27 days ago
26 days ago]
A trans equatorial negative polarity coronal hole (CH1253) rotated acrosss the central meridian on November 4-5. A recurrent northern hemisphere positive polarity coronal hole (CH1254) will become Earth facing on November 8-12. CH1254 has expanded a lot since the previous previous rotation and become a large coronal hole.
Long distance low and medium frequency (below 2 MHz) propagation along paths north of due west over upper middle and high latitudes is poor. Propagation on long distance northeast-southwest paths is poor to fair.
The geomagnetic field is expected to be quiet to active on November 9 with a chance of minor storm intervals due to effects from CH1253. Quiet to unsettled conditions are likely on November 10. November 11-15 could see quiet to minor storm levels as a high speed stream associated with CH1254 becomes the dominant solar wind source.
| Coronal holes (1) | Coronal mass ejections (2) | M and X class flares (3) |
1) Effects from a coronal hole could
reach Earth within the next 5 days. When the high speed stream has arrived
the color changes to green.
2) Effects from a CME are likely to be observed at Earth within 96
hours.
3) There is a possibility of either M or X class flares within the
next 48 hours.
Green: 0-30% probability, Yellow: 30-70% probability, Red: 70-100% probability.
(Click on image for 2K resolution).
4K resolution.
Compare to the previous
day's image. 0.5K image
When available the active region map has a coronal hole polarity overlay where red (pink) is negative and blue is positive.
Data for all officially numbered solar regions according to the Solar Region Summary provided by NOAA/SWPC, all other regions are numbered sequentially as they emerge using the STAR spot number. Comments are my own, as is the STAR spot count (spots observed at or inside a few hours before midnight) and data for regions not numbered by SWPC or where SWPC has observed no spots. SWPC active region numbers in the table below and in the active region map above are the historic SWPC/USAF numbers. SWPC data considered to be not sufficiently precise (location, area, classification) are colored red.
| Active region | SWPC date numbered STAR detected |
Spot count | Location at midnight | Area | Classification | SDO / HMI 4K continuum image with magnetic polarity overlays |
Comment | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SWPC/ USAF |
Magnetic (SDO) |
SWPC | STAR | Current | Previous | ||||||
| 2K | 1K | ||||||||||
| 13878 | 2024.10.26 2024.10.27 |
2 | 4 | 3 | N16W80 | 0100 | HAX | HAX |
 |
 |
location: N16W78 |
| 13879 | 2024.10.28 2024.10.29 |
2 | 6 | 4 | N15W58 | 0450 | HHX | CKO |
 |
 |
area: 0920 location: N15W55 |
| 13880 | 2024.10.29 2024.10.31 |
2 | S14W54 | 0002 | AXX |
 |
 |
location: S14W49 |
|||
| S10300 | 2024.10.30 | S03W35 |
 |
||||||||
| 13881 | 2024.10.30 2024.11.01 |
7 | 8 | 6 | S09W71 | 0120 | DSO | DAO |
 |
 |
beta-gamma location: S09W70 |
| 13883 | 2024.11.01 2024.11.02 |
35 | 54 | 32 | S06W21 | 0420 | FKC | FKI |
 |
 |
beta-gamma-delta area: 0620 |
| S10309 | 2024.11.01 | S24W58 | |||||||||
| 13884 | 2024.11.02 2024.11.02 |
1 | 12 | 7 | S07W03 | 0020 | HSX | CAO |
 |
 |
area: 0050 location: S07W01 |
| S10314 | 2024.11.02 | 14 | 3 | S11E02 | 0020 | BXO |
 |
 |
|||
| S10316 | 2024.11.02 | N18W39 | |||||||||
| 13886 | 2024.11.03 2024.11.03 |
32 | 68 | 45 | S08E09 | 0170 | EAI | EAI |
 |
 |
location: S05E11 area: 0330 SWPC includes AR S10324 in this spot group |
| S10319 | 2024.11.03 | N18W20 |
 |
||||||||
| S10320 | 2024.11.03 | N16W02 | |||||||||
| S10322 | 2024.11.04 | N03W43 | |||||||||
| S10323 | 2024.11.04 | 9 | 5 | S07W33 | 0029 | CRO |
 |
 |
|||
| S10324 | 2024.11.04 | 30 | 18 | S12E12 | 0100 | DRI |
 |
 |
|||
| S10325 | 2024.11.04 | S14W26 | |||||||||
| 13888 | 2024.11.05 2024.11.06 |
N04W80 | |||||||||
| S10329 | 2024.11.05 | N15W41 | |||||||||
| S10330 | 2024.11.05 | 3 | 1 | S15E41 | 0015 | HRX |
 |
 |
|||
| S10331 | 2024.11.05 | S08E08 |
 |
merged with AR 13886 on 2024.11.08 | |||||||
| 13889 | 2024.11.06 2024.11.07 |
18 | 36 | 21 | S10E52 | 0400 | EKO | EKC |
 |
 |
beta-gamma-delta location: S10E54 area: 0700 |
| S10334 | 2024.11.06 | N12W18 | |||||||||
| S10336 | 2024.11.06 | S14W13 |
 |
||||||||
| S10337 | 2024.11.07 | S11E20 |
 |
||||||||
| S10338 | 2024.11.07 | 2 | 1 | N22E07 | 0005 | AXX |
 |
 |
|||
| S10339 | 2024.11.08 | 2 | 2 | S11E63 | 0020 | HRX |
 |
||||
| Total spot count: | 97 | 250 | 148 | ||||||||
| Sunspot number: | 167 | 390 | 278 | (total spot count + 10 * number of spotted regions) | |||||||
| Weighted SN: | 147 | 312 | 210 | (Sum of total spot count + classification weighting for each AR. Classification weighting: X=0, R=3, A/S=5, H/K=10) | |||||||
| Relative sunspot number (Wolf number): | 183 | 215 | 222 | ||||||||
| Month | Average solar flux | International sunspot number (WDC-SILSO) |
Smoothed sunspot number (4) | Average
ap (3) |
|
|---|---|---|---|---|---|
| Measured | 1 AU | ||||
| 2014.02 | 170.3 (cycle peak) |
166.3 | 146.1 (SC24 peak) | 110.5 | 10.70 |
| 2014.04 | 143.9 | 144.8 | 112.5 | 116.4 (SC24 solar max) | 7.88 |
| 2017.09 | 91.3 | 92.3 | 43.6 | 18.2 (-1.3) | 18.22 (SC24 peak) |
| 2019.11 | 70.2 | 68.7 | 0.5 | 2.0 (-0.6) (Solar minimum using 365d smoothing: November 17, 2019) |
4.19 |
| 2019.12 | 70.8 | 68.6 | 1.6 | 1.8 (-0.2) (ISN 13 months smoothed solar minimum) |
3.22 |
| 2023.01 | 182.4 | 176.6 | 144.4 | 113.3 (+6.6) | 8.73 |
| 2023.02 | 167.2 | 163.2 | 111.3 | 117.8 (+3.5) | 14.48 |
| 2023.03 | 157.2 | 155.6 | 123.3 | 121.1 (+3.3) | 14.42 |
| 2023.04 | 145.4 | 146.4 | 97.6 | 122.9 (+1.8) | 13.40 |
| 2023.05 | 155.6 | 159.2 | 137.4 | 124.2 (+1.3) | 10.67 |
| 2023.06 | 161.7 | 166.8 | 160.5 | 125.3 (+1.1) | 8.95 |
| 2023.07 | 176.4 | 182.2 | 160.0 | 124.6 (-0.7) | 8.15 |
| 2023.08 | 153.7 | 157.6 | 114.8 | 124.3 (-0.3) | 7.19 |
| 2023.09 | 154.4 | 156.0 | 134.2 | 124.0 (-0.3) | 14.26 |
| 2023.10 | 142.8 | 141.9 | 99.4 | 124.8 (+0.8) | 8.16 |
| 2023.11 | 153.5 | 150.2 | 105.4 | 127.9 (+3.1) | 12.20 |
| 2023.12 | 151.1 | 146.4 | 114.2 | 129.5 (+1.6) | 9.60 |
| 2024.01 | 164.6 | 159.3 | 126.0 | 131.1 (+1.6) | 5.46 |
| 2024.02 | 172.5 | 168.3 | 123.0 | 136.9 (+5.8) | 5.31 |
| 2024.03 | 154.4 | 152.9 | 103.7 | 141.4 (+4.5) | 11.03 |
| 2024.04 | 161.3 | 162.6 | 137.0 | 144.4 (+3.1) | 9.69 |
| 2024.05 | 187.7 | 191.9 | 172.1 | (149.7 projected, +5.3) | 23.56 (SC25 peak) |
| 2024.06 | 184.3 | 190.2 | 164.1 | (153.6 projected, +3.9) | 10.24 |
| 2024.07 | 196.6 | 203.0 | 196.5 | (156.5 projected, +2.9) | 7.13 |
| 2024.08 | 246.1 (cycle peak) |
252.2 | 215.5 (SC25 peak) | (158.5 projected, +2.0) | 15.96 |
| 2024.09 | 195.7 | 197.8 | 141.4 | (161.2 projected, +2.7) | 15.36 |
| 2024.10 | 221.0 | 219.6 | 166.3 | (163.5 projected, +2.3) | 19.0 |
| 2024.11 | 245.8 (1) | 49.9 (2A) / 187.0 (2B) / 212.4 (2C) | (161.8 projected, -1.7) | (9.9) | |
| 2024.12 | (158.7 projected, -3.1) | ||||
| 2025.01 | (154.4 projected, -4.3) | ||||
| 2025.02 | (147.6 projected, -6.8) | ||||
| 2025.03 | (142.8 projected, -4.8) | ||||
| 2025.04 | (139.8 projected, -3.0) | ||||
1) Running average based on the daily 20:00 UTC observed solar flux value
at 2800 MHz and any corrections applied to that measurement.
2A) Current impact on the monthly sunspot number based on the Boulder
(NOAA/SWPC) sunspot number (accumulated daily sunspots / month days).
2B) Boulder SN current month average to date.
2C) STAR SDO 1K Wolf number 30 day average.
3) Running average based on the quicklook and definitive Potsdam WDC ap
indices. Values in red
are based on the definitive international
GFZ Potsdam WDC ap
indices.
4) Source: WDC-SILSO, Royal Observatory
Of Belgium, Brussels
Sunspot activity in October 2024 increased over September and looks to be headed for an SSN near 160. The average solar flux for October will become the second highest for a month during SC25. The above plot now displays the peak in 365d smoothed sunspot numbers in mid October. ISN has a peak on October 15, NOAA SN on October 14 while both the 1K and 2K SDO SN peaked on October 16. Assuming that the average sunspot number from October 2024 until April 14, 2025 becomes 150, we would be looking at a 365 days smoothed sunspot maximum of 164.5 centered on October 15. Should the average sunspot number for that period become 160 we would get a peak near 169.7.
--------------------------------------------------------------------------------------
This report has been prepared by Jan Alvestad. It is based on the analysis of data from whatever sources are available at the time the report is prepared. All time references are to Universal Time. Comments and suggestions are always welcome.
SDO images are courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
