Viewing archive of Wednesday, 19 September 2007
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 2007 Sep 19 2203 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 2007IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was very low. The visible disk remained
spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic field was quiet
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled on 20 September and mostly
unsettled on 21 September as a recurrent coronal hole becomes
geoeffective. Conditions are expected to remain unsettled to
active, with a chance for minor storm periods at high latitudes, on
22 September.
III. Event Probabilities 20 Sep to 22 Sep
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Sep 067 Predicted 20 Sep-22 Sep 067/070/070 90 Day Mean 19 Sep 069
V. Geomagnetic A Indices
Observed Afr/Ap 18 Sep 002/003 Estimated Afr/Ap 19 Sep 004/005 Predicted Afr/Ap 20 Sep-22 Sep 005/008-008/008-015/015
VI. Geomagnetic Activity Probabilities 20 Sep to 22 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 35% |
| Minor storm | 01% | 10% | 10% |
| Major-severe storm | 01% | 05% | 10% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 35% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 05% | 10% |
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
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 | 2024/05/03 | X1.6 |
| Last M-flare | 2024/05/03 | M4.4 |
| Last geomagnetic storm | 2024/05/02 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| Last 30 days | 149.4 +51.8 |