Viewing archive of Monday, 19 September 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 Sep 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 262 Issued at 2200Z on 19 Sep 2011IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was low. Region 1296 (N26W05) produced a
long duration C6 flare at 19/0737Z. Region 1301 (N20E63) produced a
C6/Sn flare at 19/1541Z. SOHO LASCO imagery observed 4 CME limb
events in the past 24 hours, none of which are expected to be
geoeffective. Region 1295 remains a beta gamma magnetic
configuration.
IB. Solar Activity Forecast
Solar activity is expected to be low
for the next three days (20-22 September). A chance for isolated
M-class flares exists from Region 1295.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was mostly quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days (20-22 September).
III. Event Probabilities 20 Sep to 22 Sep
| Class M | 40% | 40% | 40% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Sep 141 Predicted 20 Sep-22 Sep 140/140/140 90 Day Mean 19 Sep 103
V. Geomagnetic A Indices
Observed Afr/Ap 18 Sep 005/005 Estimated Afr/Ap 19 Sep 005/005 Predicted Afr/Ap 20 Sep-22 Sep 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 20 Sep to 22 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 09% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
Latest news
Monday, 22 April 2024
Lot's of sunspots! Big chance for major flare activity?
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Latest forum messages
What are these long and thin eruptions? 3AR 3637, 3638, 3643 89Unproven theories 341Space Weather Memes 338Filaments and prominences 55
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 | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/25 | M1.0 |
| Last geomagnetic storm | 2024/04/19 | Kp7 (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |
| Last 30 days | 133.9 +26.6 |