Viewing archive of Tuesday, 21 August 2012
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 2012 Aug 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 234 Issued at 2200Z on 21 Aug 2012IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity was very low. A few low level B-class
flares were observed. Three new regions were numbered: Region 1550
(S11W81) a Bxo-beta type group; Region 1551 (N13W14) a Bxo-beta type
group; and Region 1552 (S18E54) an Hsx-alpha type group. The
remaining numbered regions were stable and quiet. Several CMEs were
observed however none appear to be Earth-directed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next three days (22-24 August).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field was quiet. 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 predominately quiet for days 1-3 (22-24 August).
III. Event Probabilities 22 Aug to 24 Aug
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Aug 094 Predicted 22 Aug-24 Aug 095/095/100 90 Day Mean 21 Aug 124
V. Geomagnetic A Indices
Observed Afr/Ap 20 Aug 011/013 Estimated Afr/Ap 21 Aug 007/006 Predicted Afr/Ap 22 Aug-24 Aug 006/005-006/005-006/005
VI. Geomagnetic Activity Probabilities 22 Aug to 24 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Saturday, 14 September 2024
X4.5 solar flare with a fast coronal mass ejection
Thursday, 12 September 2024
G3 geomagnetic storm watch due to CME passage
Monday, 12 August 2024
Severe G4 geomagnetic storm
Latest forum messages
Density and Temperature ?s 1AR3828 3Some weird thing on farside seismic signature 10AR 3825 217Unspecified geomagnetic activity 1444
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 | 2024/09/14 | X4.54 |
| Last M-flare | 2024/09/14 | M3.0 |
| Last geomagnetic storm | 2024/09/17 | Kp8- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| August 2024 | 215.5 +19 |
| September 2024 | 151.6 -63.9 |
| Last 30 days | 159.7 -53.2 |