The geomagnetic field was quiet to unsettled on June 28. Solar wind speed ranged between 491 and 571 km/sec. The high latitude magnetometer at Andenes recorded quiet to major storm levels.
Solar flux density measured at 20h UT on 2.8 GHz was 96.1 - decreasing 8.1 over the previous solar rotation. (Centered 1 year average SF at 1 AU - 183 days ago: 102.84). The Potsdam WDC planetary A index was 7 (STAR Ap - based on the mean of three hour interval ap indices: 7.4). Three hour interval K indices: 12221123 (planetary), 35331123 (Boulder), 33322136 (Andenes).
The background x-ray flux is at the class B2 level (GOES 16).
At the time of counting spots (see image time), spots were observed in 9 active regions using 2K resolution (SN: 136) and in 6 active regions using 1K resolution (SN: 78) SDO/HMI images.
Region 13040 [S13W23] was mostly quiet and
stable. A small area of polarity intermixing was observed to the north of
the main spot.
Region 13041 [N15W82] decayed rapidly and had nearly lost all spots
when it rotated to the northwest limb late in the day.
New region 13042 [N09W20] emerged on June 27 and was numbered the
next day by SWPC.
New region 13043 [S13E24] emerged on June 27 with SWPC numbering the
region the following day.
New region 13044 [S19E14] emerged on June 27 and decayed on June 28
when it was numbered by SWPC.
Spotted regions not observed (or interpreted
differently) by SWPC:
S7660 [N17W34] was quiet and stable.
New region S7661 [S11E55] emerged early in the
day with tiny spots.
New region S7662 [S22W07] emerged with a tiny spot.
New region S7663 [S31W03] was observed with tiny spots in an old
plage area.
A filament eruption in the northeast quadrant covering about 20 degrees from near the central meridian was observed beginning near 22:07 UT. No obvious CME was observed afterwards.
C2+ flares:
| Magnitude | Peak time (UT) | Location | Source | Recorded by | Comment |
June 26-28: No obviously Earth directed CMEs were observed in available LASCO imagery.
[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 northern hemisphere coronal hole (CH1086) could rotate into an Earth facing position on July 1.
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.
Quiet to unsettled conditions are likely on June 29 - July 1. There is a slight chance effects from a CME observed on June 26 could reach Earth on June 29 and cause some unsettled and active intervals.
| Coronal holes (1) | Coronal mass ejection (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 | ||||||||||
| S7651 | 2022.06.20 | N27W45 |
 |
||||||||
| S7653 | 2022.06.20 | S23W41 |
 |
||||||||
| 13040 | 2022.06.20 2022.06.21 |
8 | 14 | 7 | S12W25 | 0120 | CAO | CAO |
 |
 |
location: S13W23 |
| 13041 | 2022.06.27 | 3 | 3 | 1 | N15W83 | 0020 | CSO | BXO |
 |
 |
area: 0008 |
| 13042 | 2022.06.27 2022.06.28 |
4 | 8 | 6 | N09W22 | 0020 | CRO | DRO |
 |
 |
area: 0040 location: N09W20 |
| S7656 | 2022.06.27 | N15E15 |
 |
||||||||
| S7657 | 2022.06.27 | S24W30 |
 |
||||||||
| 13044 | 2022.06.27 2022.06.28 |
2 | 6 | 2 | S19E12 | 0010 | BXO | BXO |
 |
 |
|
| 13043 | 2022.06.27 2022.06.28 |
4 | 2 | 1 | S13E21 | 0010 | BXO | CRO |
 |
 |
location: S13E24 |
| S7660 | 2022.06.27 | 3 | N17W34 | 0004 | BXO |
 |
 |
||||
| S7661 | 2022.06.28 | 4 | 1 | S11E55 | 0006 | CRO |
 |
||||
| S7662 | 2022.06.28 | 1 | S22W07 | 0002 | AXX |
 |
|||||
| S7663 | 2022.06.28 | 5 | S31W03 | 0005 | BXO |
 |
|
||||
| Total spot count: | 21 | 46 | 18 | ||||||||
| Sunspot number: | 71 | 136 | 78 | (total spot count + 10 * number of spotted regions) | |||||||
| Weighted SN: | 34 | 60 | 42 | (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): | 78 | 68 | 62 | ||||||||
| 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 (solar max) | 7.88 |
| 2017.09 | 91.3 | 92.3 | 43.6 | 18.2 (-1.3) | 18.22 (cycle 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 |
| 2020.12 | 86.9 | 84.2 | 23.1 | 15.3 (+1.7) | 4.72 |
| 2021.01 | 76.0 | 73.6 | 10.4 | 17.3 (+2.0) | 4.39 |
| 2021.02 | 74.3 | 72.4 | 8.2 | 19.0 (+1.7) | 9.50 |
| 2021.03 | 76.0 | 75.2 | 17.2 | 21.7 (+2.7) | 10.17 |
| 2021.04 | 75.9 | 76.4 | 24.5 | 24.8 (+3.1) | 8.40 |
| 2021.05 | 75.3 | 77.1 | 21.2 | 25.8 (+1.0) | 6.50 |
| 2021.06 | 79.4 | 81.8 | 25.0 | 27.6 (+1.8) | 5.52 |
| 2021.07 | 81.0 | 83.6 | 34.3 | 31.3 (+3.7) | 5.51 |
| 2021.08 | 77.7 | 79.7 | 22.0 | 35.3 (+4.0) | 6.19 |
| 2021.09 | 87.0 | 88.2 | 51.3 | 40.0 (+4.7) | 6.33 |
| 2021.10 | 88.9 | 88.3 | 37.4 | 45.0 (+5.0) | 7.38 |
| 2021.11 | 86.2 | 84.4 | 34.8 | 50.6 (+5.6) | 9.83 |
| 2021.12 | 103.0 | 99.8 | 67.5 | (55.7 projected, +5.1) | 6.40 |
| 2022.01 | 103.8 | 100.5 | 54.0 | (60.4 projected, +4.7) | 8.92 |
| 2022.02 | 109.1 | 106.5 | 59.7 | (66.9 projected, +6.5) | 10.46 |
| 2022.03 | 117.0 | 115.8 | 78.5 | (72.4 projected, +5.5) | 10.20 |
| 2022.04 | 130.8 | 131.7 | 84.1 | (77.6 projected, +5.2) | 11.79 |
| 2022.05 | 133.8 | 136.8 | 96.5 | (84.1 projected, +6.5) | 7.48 |
| 2022.06 | 117.6 (1) | 68.6 (2A) / 73.5 (2B) / 94.9 (2C) | (89.9 projected, +5.8) | (9.0) | |
| 2022.07 | (97.2 projected, +7.3) | ||||
| 2022.08 | (103.8 projected, +6.6) | ||||
| 2022.09 | (108.8 projected, +5.0) | ||||
| 2022.10 | (112.0 projected, +3.2) | ||||
| 2022.11 | (114.8 projected, +2.8) | ||||
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: SIDC-SILSO.
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.
