Viewing archive of Thursday, 21 January 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 Jan 21 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 021 Issued at 2200Z on 21 Jan 2010IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity has been at low levels for the past 24
hours. Region 1041 (S21E61) produced several C-class flares, the
largest being a C4 at 21/0120Z. Region 1041 also produced a long
duration B4 flare at 21/1733Z. Region 1041 has remained stable and
is classified as a Cao-beta with 7 spots.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low to low levels with a chance for M-class flare activity.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field has been at quiet to unsettled levels with
isolated active conditions at high latitudes. The effects of the
co-rotating interaction region have subsided and data from the ACE
spacecraft indicate we are currently in a coronal hole high-speed
stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain at quiet levels for the next three days (22-24
January).
III. Event Probabilities 22 Jan to 24 Jan
| Class M | 35% | 35% | 35% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Jan 083 Predicted 22 Jan-24 Jan 084/085/085 90 Day Mean 21 Jan 077
V. Geomagnetic A Indices
Observed Afr/Ap 20 Jan 006/014 Estimated Afr/Ap 21 Jan 005/005 Predicted Afr/Ap 22 Jan-24 Jan 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 22 Jan to 24 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
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
Strong far side CME 337Incoming & Unnumbered Active Regions 135850 mhz F2 51AR 13932 13Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 11
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 | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M1.0 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 106.6 -45.9 |
| Last 30 days | 116.1 -41.8 |