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% |
All times in UTC
Latest news
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
Incoming & Unnumbered Active Regions 1359Strong far side CME 338Unspecified geomagnetic activity 175150 mhz F2 51AR 13932 13
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 | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 106.6 -45.9 |
| Last 30 days | 116.1 -41.8 |