Viewing archive of Thursday, 8 December 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 Dec 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 342 Issued at 2200Z on 08 Dec 2011IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity was low. A few low level C-class flares
occurred early in the period from a region not yet around the east
limb.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next 3 days (9-11 December).
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for days 1-2 (9-10 December) before increasing
to unsettled and active conditions on day 3 (11 December) due to a
coronal hole high speed stream.
III. Event Probabilities 09 Dec to 11 Dec
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Dec 145 Predicted 09 Dec-11 Dec 145/145/145 90 Day Mean 08 Dec 146
V. Geomagnetic A Indices
Observed Afr/Ap 07 Dec 001/001 Estimated Afr/Ap 08 Dec 005/005 Predicted Afr/Ap 09 Dec-11 Dec 005/005-005/005-008/008
VI. Geomagnetic Activity Probabilities 09 Dec to 11 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 40% |
| Minor storm | 05% | 05% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 50% |
| Minor storm | 01% | 01% | 25% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Saturday, 14 September 2024
X4.5 solar flare with a fast coronal mass ejection
Thursday, 12 September 2024
G3 geomagnetic storm watch due to CME passage
Monday, 12 August 2024
Severe G4 geomagnetic storm
Latest forum messages
AR 3825 218Unspecified geomagnetic activity 1446Some weird thing on farside seismic signature 11Density and Temperature ?s 3Density and Temperature ?s 0
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 | 2024/09/14 | X4.54 |
| Last M-flare | 2024/09/14 | M3.0 |
| Last geomagnetic storm | 2024/09/17 | Kp8- (G4) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| August 2024 | 215.5 +19 |
| September 2024 | 151.6 -63.9 |
| Last 30 days | 158.3 -54.2 |