Viewing archive of Wednesday, 23 December 2009
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 2009 Dec 23 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 357 Issued at 2200Z on 23 Dec 2009IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity was low. Isolated B- and C-class flares
occurred. The largest flare was a C6/Sf from Region 1036 (S28W70) at
23/1017Z. Region 1036 showed no significant changes during the
period. Region 1038 (N15W69) gradually decayed during the period. No
new regions were numbered.
IB. Solar Activity Forecast
Solar activity is forecast to be low
during days 1 - 2 (24 - 25 December) with isolated C-class flares
expected. There will also be a slight chance for an isolated M-class
flare. Activity is expected to decrease to very low levels on day 3
(26 December), once Regions 1036 and 1038 depart the visible disk.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
Geomagnetic field activity was at quiet levels through the period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at mostly quiet levels through the period (24 - 26
December).
III. Event Probabilities 24 Dec to 26 Dec
| Class M | 10% | 05% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Dec 078 Predicted 24 Dec-26 Dec 076/074/072 90 Day Mean 23 Dec 074
V. Geomagnetic A Indices
Observed Afr/Ap 22 Dec 002/002 Estimated Afr/Ap 23 Dec 002/002 Predicted Afr/Ap 24 Dec-26 Dec 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 24 Dec to 26 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Monday, 11 November 2024
Coronal hole faces Earth
Friday, 1 November 2024
X2.0 solar flare
Wednesday, 9 October 2024
X1.8 solar flare, severe geomagnetic storm watch
Latest forum messages
Filaments and prominences 488AR 13901 90Incoming & Unnumbered Active Regions 1245Sunspot Latitudes at or near Solar Maximum 76The Rotations of AR 13780 and AR 13902 1
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 | 2024/11/06 | X2.39 |
| Last M-flare | 2024/11/20 | M1.1 |
| Last geomagnetic storm | 2024/11/10 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2024 | 166.4 +25 |
| November 2024 | 142.7 -23.8 |
| Last 30 days | 155.2 +4.4 |