Last major update issued on June 12, 2014 at 04:50 UTC.
[Solar and geomagnetic data - last month (updated
daily)]
[Solar wind and
electron fluence charts (updated
daily)]
[Solar cycles 23-24 (last update June 1, 2014)] [Cycle
24 progress (last update June 1, 2014) ]
[Solar cycles 1-20]
[Graphical comparison of cycles 21, 22, 23 and 24 (last
update June 1, 2014)]
[Graphical comparison of cycles 10, 12, 13, 14, 16 and
24 (last update June 1, 2014)]
[Historical solar and geomagnetic data charts 1954-2006
(last update April 5, 2007)]
[Archived reports since January 2003 (last update
May 1, 2014)]
[POES auroral activity level October
2009 - December 2012]
[Solar polar fields vs solar cycles - updated
June 4, 2014]
[Presentations:
3rd
SSN Workshop, Tucson, 2013 (pdf)
/
4th SSN Workshop, Locarno, 2014]
The geomagnetic field was quiet on June 11. Solar wind speed at SOHO ranged between 460 and 642 km/s, weakly under the influence of a high speed stream from CH622.
Solar flux at 20h UTC on 2.8 GHz was 168.4 (increasing 14.3 over the last solar rotation). The 90 day 10.7 flux at 1 AU was 139.9. The Potsdam WDC planetary A index was 6 (STAR Ap - based on the mean of three hour interval ap indices: 6.0). Three hour interval K indices: 22121221 (planetary), 22232322 (Boulder).
The background x-ray flux is at the class C1 level.
At the time of counting spots (see image time), spots were observed in 14 active regions using 2K resolution (SN: 324) and 13 active regions using 1K resolution (SN: 231) SDO images on the visible solar disk.
Region 12079 [N12W68] was quiet and stable.
Region 12080 [S10W51] decayed slowly losing spots and area. There is
still a weak magnetic delta structure in the trailing spot section, another minor M
class flare is possible.
Region 12082 [N15W41] decayed slowly and quietly.
Region 12085 [S19W43] decayed slowly and was mostly quiet.
Region 12087 [S18E57] produced another X class flare. The region lost the
magnetic delta structure and is likely to become less active unless there is new
development. M flares are possible.
New region 12088 [S09W32] was first observed with spots on June 6. New
flux and several spots emerged on June 11 and the region was numbered by SWPC.
New region 12089 [N18E17] emerged on June 7 with more flux emerging on
June 10 and 11. The region is actually two smaller regions which have emerged
very close to each other. A weak magnetic delta structure has formed centrally.
New region 12090 [N25E69] rotated into view on June 10 and was numbered
the next day by SWPC.
Spotted regions not numbered (or interpreted differently) by SWPC:
S3515 [S16W19] reemerged with penumbra spots.
New region S3529 [S08E11] emerged with several spots.
New region S3530 [S19E75] rotated into view.
New region S3531 [S22E60] emerged with a penumbra spot to the south of AR
12087.
New region S3532 [S32E32] emerged with a penumbra spot.
New region S3533 [N18W68] emerged with a few spots
to the north of AR 12079.
Magnitude | Time (UTC) | Location | AR |
C3.9 | 01:28 | N17E30 | 12089 |
C2.3 | 03:02 | N13W28 | 12082 |
C5.0/2N | 04:47 | S17E71 | 12087 |
M1.8 | 05:34 | S12W35 | 12080 |
C3.4 | 06:32 | S13E69 | 12087 |
C2.8 | 07:12 | S13W35 | 12080 |
M3.0/2B | 08:09 | S14E68 | 12087 |
X1.0 | 09:06 | S18E65 | 12087 |
C2.3 | 11:42 | S12E62 | 12080 |
M3.9 | 21:03 | S21E58 | 12087 |
June 9, 11: No obviously Earth directed CMEs were observed in LASCO and
STEREO imagery.
June 10: An asymmetric full halo CME was observed after the X flares in
AR 12087. The CME could reach Earth on June 13.
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 small trans equatorial coronal hole (CH622) rotated into an Earth facing position on June 8-9.
Long distance low and medium frequency (below 2 MHz) propagation along paths north of due west over upper middle latitudes is poor. Propagation on long distance northeast-southwest paths is poor.
The geomagnetic field is expected to be quiet on June 12. On June 13-14 unsettled and active intervals are possible due to CME effects.
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) 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 numbered solar regions according to the Solar Region Summary provided by NOAA/SWPC. 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.
Active region | Date numbered detected |
Spot count | Location at midnight | Area | Classification | SDO / HMI 4K continuum image with magnetic polarity overlay |
Comment | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
SWPC | Magnetic (SDO) |
SWPC | STAR | Current | Previous | ||||||
2K | 1K | ||||||||||
12079 | 2014.05.31 2014.06.01 |
8 | 9 | 8 | N13W69 | 0120 | DAO | DSC | area: 0190 | ||
12081 | 2014.06.01 2014.06.04 |
N05W71 | location: N04W59 | ||||||||
12080 | 2014.06.02 2014.06.03 |
14 | 29 | 13 | S11W50 | 0360 | DKC | DKC |
beta-gamma-delta area: 0440 |
||
S3499 | 2014.06.03 | S09W55 | plage | ||||||||
S3501 | 2014.06.04 | S23W49 | plage | ||||||||
12082 | 2014.06.04 2014.06.05 |
14 | 25 | 13 | N15W41 | 0220 | DAI | DAO | area: 0300 | ||
S3505 | 2014.06.05 | S15W32 | plage | ||||||||
12085 | 2014.06.05 2014.06.06 |
25 | 39 | 20 | S20W43 | 0480 | EKC | EKC |
beta-gamma area: 0560 |
||
12084 | 2014.06.06 | 2 | S13W81 | 0010 | AXX | spotless | |||||
12088 | 2014.06.06 2014.06.11 |
6 | 14 | 6 | S11W33 | 0020 | CRO | DRI | |||
12089 | 2014.06.07 2014.06.11 |
6 | 18 | 12 | N18E16 | 0020 | CRO | DAC | beta-gamma-delta | ||
S3515 | 2014.06.07 | 2 | 1 | S16W19 | 0007 | BXO | |||||
S3516 | 2014.06.07 | N22E11 | plage | ||||||||
12086 | 2014.06.08 | N03W09 | plage | ||||||||
S3522 | 2014.06.08 | S20W04 | plage | ||||||||
12087 | 2014.06.09 2014.06.10 |
10 | 19 | 10 | S18E57 | 0180 | DSC | DSC |
beta-gamma area: 0330 |
||
S3524 | 2014.06.09 | S16E17 | plage | ||||||||
S3525 | 2014.06.09 | N07W34 | plage | ||||||||
12090 | 2014.06.10 2014.06.11 |
1 | 3 | 2 | N24E65 | 0080 | HSX | ESO | area: 0240 | ||
S3528 | 2014.06.10 | N24W45 | plage | ||||||||
S3529 | 2014.06.11 | 13 | 9 | S08E11 | 0060 | DRI | |||||
S3530 | 2014.06.11 | 8 | 4 | S19E75 | 0080 | DRO | |||||
S3531 | 2014.06.11 | 1 | 1 | S22E60 | 0004 | AXX | |||||
S3532 | 2014.06.11 | 1 | S22E32 | 0002 | AXX | ||||||
S3533 | 2014.06.11 | 3 | 2 | N18W68 | 0010 | BXO | |||||
Total spot count: | 86 | 184 | 101 | ||||||||
Sunspot number: | 176 | 324 | 231 | (total spot count + 10 * number of spotted regions) | |||||||
Weighted SN: | 132 | 238 | 155 | (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): | 106 | 113 | 127 | k * (sunspot number). k = 0.6 for SWPC, k = 0.35 for MSN 2K, k = 0.55 for MSN 1K (MSN=Magnetic Sunspot Number) |
Month | Average solar flux | International sunspot number (WDC-SILSO) |
Smoothed sunspot number | Average ap (3) |
|
---|---|---|---|---|---|
Measured | 1 AU | ||||
2013.02 | 104.3 | 101.8 | 38.0 | 58.4 (-0.3) | 6.11 |
2013.03 | 111.3 | 110.2 | 57.9 | 57.5 (-0.9) | 10.56 |
2013.04 | 124.8 | 125.9 | 72.4 | 57.9 (+0.4) | 5.40 |
2013.05 | 131.4 | 134.3 | 78.7 | 59.9 (+2.0) | 9.73 |
2013.06 | 110.1 | 113.7 | 52.5 | 62.6 (+2.7) | 12.60 |
2013.07 | 115.5 | 119.3 | 57.0 | 65.5 (+2.9) | 9.47 |
2013.08 | 114.6 | 118.3 | 66.0 | 69.0 (+3.5) | 8.27 |
2013.09 | 102.6 | 103.7 | 36.9 | 73.1 (+4.1) | 5.23 |
2013.10 | 132.1 | 131.2 | 85.6 | 75.0 (+1.9) | 7.71 |
2013.11 | 148.3 | 145.1 | 77.6 | 75.4 (+0.4) | 5.68 |
2013.12 | 147.7 | 143.1 | 90.3 | (75.8 projected, +0.4) | 4.68 |
2014.01 | 157.4 | 152.4 | 82.0 | (76.4 projected, +0.6) | 5.44 |
2014.02 | 170.3 (cycle peak) |
166.3 | 102.8 (cycle peak) | (76.2 projected, -0.2) | 10.70 |
2014.03 | 149.9 | 148.5 | 92.2 | (76.6 projected, +0.4) | 4.88 |
2014.04 | 143.9 | 144.8 | 84.7 | (75.8 projected, -0.8) | 7.88 |
2014.05 | 129.7 | 132.9 | 75.2 | (73.2 projected, -2.6) | 5.75 |
2014.06 | 131.4 (1) | 42.2 (2A) / 115.0 (2B) / 87.2 (2C) | (70.5 projected, -2.7) | (8.5) |
1) Running average based on the daily 20:00 UTC observed solar flux value at
2800 MHz.
2A) Current impact on the monthly sunspot number based on the Boulder
(NOAA/SWPC) sunspot number (accumulated daily sunspots / month days). The
official WDC-SILSO international sunspot number is typically 30-50% lower. 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.
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 the UTC day. Comments and suggestions are always welcome.
SDO images are courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.