Viewing archive of Friday, 31 December 2010
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 2010 Dec 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 365 Issued at 2200Z on 31 Dec 2010IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity increased to low levels. Region 1138
(N12W70) produced a C1 flare at 31/0425Z associated with a Type II
radio sweep (estimated shock velocity 875 km/s) and a
non-Earth-directed CME. New Region 1140 (N32E67) produced a B9 flare
at 31/1934Z.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low during the period (01 - 03 January) with a chance for
isolated C-class flares from Region 1140.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet levels through the period (01 - 03 January).
III. Event Probabilities 01 Jan to 03 Jan
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Dec 091 Predicted 01 Jan-03 Jan 092/090/088 90 Day Mean 31 Dec 083
V. Geomagnetic A Indices
Observed Afr/Ap 30 Dec 004/005 Estimated Afr/Ap 31 Dec 004/005 Predicted Afr/Ap 01 Jan-03 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 01 Jan to 03 Jan
| 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
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
Growth of Cycle 25 694Some weird thing on farside seismic signature 12AR 3828 4Quick question 3AR 3825 221
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 | 149.4 -66.1 |
| Last 30 days | 156.7 -55.8 |