Viewing archive of Monday, 22 August 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 Aug 22 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 22 Aug 2011IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z Solar activity was low. Region 1272 (S21W08) produced a
C1 event at 21/2316Z, and 1271 (N17W16) produced a long duration C1
event at 22/1604Z. Both regions also produced several B-class
flares. Region 1274 (N18E42) produced a notable B9 event at
22/0949Z. Region 1271 had significant intermediate spot and
penumbral growth.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a slight chance for moderate activity.
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
The geomagnetic field was quiet to unsettled, consistent with effects
from a weak coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (23-25 Aug) as effects
from the high speed stream subside.
III. Event Probabilities 23 Aug to 25 Aug
| Class M | 20% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 22 Aug 108 Predicted 23 Aug-25 Aug 110/112/112 90 Day Mean 22 Aug 097
V. Geomagnetic A Indices
Observed Afr/Ap 21 Aug 003/003 Estimated Afr/Ap 22 Aug 005/008 Predicted Afr/Ap 23 Aug-25 Aug 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 23 Aug to 25 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 10% |
| 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
Strong far side CME 329Unspecified geomagnetic activity 1749Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 9Filaments and prominences 595Incoming & Unnumbered Active Regions 1351
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 | 2024/12/22 | 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 | 103.3 -49.2 |
| Last 30 days | 115.4 -40.8 |