Viewing archive of Tuesday, 28 June 2011
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2011 Jun 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 179 Issued at 2200Z on 28 Jun 2011IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity remained at very low levels. Three
B-class flares were observed during the period. Region 1236 (N16,
L=170) produced a long-duration B6 flare at 28/0107Z, as well as a
B9 flare at 28/1321Z. New Regions 1242 (N18W03) and 1243 (N18E62)
were numbered today. Both Regions are small and were classified as
Cro-beta groups. Region 1243 produced a B3 flare at 28/0647Z.
IB. Solar Activity Forecast
Solar activity is expected to be very
low for the period (29 Jun - 1 July), with a chance for an isolated
C-class flare.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was at quiet levels. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet during days 1 and 2 (29 - 30 June). Activity is
expected to be at quiet levels during most of day 3 (01 July), with
an active period late in the day (01 July). The increase in activity
is due to a recurrent coronal hole high speed stream.
III. Event Probabilities 29 Jun to 01 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jun 087 Predicted 29 Jun-01 Jul 088/088/088 90 Day Mean 28 Jun 102
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jun 004/005 Estimated Afr/Ap 28 Jun 004/005 Predicted Afr/Ap 29 Jun-01 Jul 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 29 Jun to 01 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
Latest news
Monday, 13 May 2024
M6.6 solar flare with earth-directed CME
Sunday, 12 May 2024
Small CME impact, Record visitor amount
Saturday, 11 May 2024
Strongest geomagnetic storm since 2003, X5.8 solar flare
Latest forum messages
Could Cycle 25 be categorized as "historical"? 9Latest SC25 Predictions 125AR3664 855AR 3676 20Unproven theories 424
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/05/12 | X1.02 |
| Last M-flare | 2024/05/13 | M3.6 |
| Last geomagnetic storm | 2024/05/12 | Kp7 (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| May 2024 | 144.3 +7.8 |
| Last 30 days | 175.2 +82.9 |