Viewing archive of Wednesday, 2 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 02 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 336 Issued at 2200Z on 02 Dec 2009IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z
Solar Activity was very low. No flares occurred during
the past 24 hours. The disk is spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for days one and two (03-04 Dec). Conditions
are expected to increase to quiet to unsettled levels with a slight
chance for isolated active periods as a recurrent coronal hole
becomes geoeffective early on day three (05 Dec).
III. Event Probabilities 03 Dec to 05 Dec
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Dec 071 Predicted 03 Dec-05 Dec 071/071/071 90 Day Mean 02 Dec 073
V. Geomagnetic A Indices
Observed Afr/Ap 01 Dec 000/000 Estimated Afr/Ap 02 Dec 001/005 Predicted Afr/Ap 03 Dec-05 Dec 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 03 Dec to 05 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 20% |
| Minor storm | 01% | 01% | 10% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 30% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 05% |
All times in UTC
Latest news
Friday, 28 March 2025
X1.1 solar flare
Monday, 24 March 2025
Coronal hole faces Earth
Saturday, 22 March 2025
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
Unspecified geomagnetic activity 22522025/04/12-13 Filament CMEs 2025/04/16 G2 Watch 26Potential AR4062 1Incoming & Unnumbered Active Regions 1690AR 4055 95
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!
Latest alerts
07:09 UTC - Solar flare
Moderate M4.28 flare from sunspot region 4055
06:48 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.53)
06:24 UTC - Solar flare
Moderate M1.49 flare from sunspot region 4055
06:06 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.16)
04:45 UTC - Geomagnetic activity
Active geomagnetic conditions (Kp4) Threshold Reached: 04:29 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/14 | M4.2 |
| Last geomagnetic storm | 2025/04/06 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 132.1 -2.1 |
| Last 30 days | 132.4 -10.7 |