Viewing archive of Monday, 23 February 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 Feb 23 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 054 Issued at 2200Z on 23 Feb 2009IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity was very low. No flares were observed
during the past 24 hours. The solar disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic field was at quiet to unsettled conditions. A
continued influence of the recurrent coronal hole high speed stream
is reflected in ACE solar wind measurements. Solar wind velocities
gradually increased from around 420 km/s to a peak of 487 km/s with
interplanetary Bz fluctuations from +5 to -5 nT.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately quiet for the next three days (24-26
February).
III. Event Probabilities 24 Feb to 26 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Feb 071 Predicted 24 Feb-26 Feb 070/070/070 90 Day Mean 23 Feb 070
V. Geomagnetic A Indices
Observed Afr/Ap 22 Feb 003/003 Estimated Afr/Ap 23 Feb 004/005 Predicted Afr/Ap 24 Feb-26 Feb 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 24 Feb to 26 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
Latest news
Saturday, 11 May 2024
Strongest geomagnetic storm since 2003, X5.8 solar flare
Saturday, 11 May 2024
Extreme G5 geomagnetic storm
Friday, 10 May 2024
Severe G4 geomagnetic storm
Latest forum messages
Geomagnetic storming, CMEs from AR 13664, 2024-05-09/10 1247Aurora movement 3Where will Aurorae be visible on May 11th after the G5 storm? 3Is there any truth to this "Internet/Electrical Grid Apocalypse"? 165AR3664 811
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 | 2024/05/11 | X1.5 |
| Last M-flare | 2024/05/11 | M8.7 |
| Last geomagnetic storm | 2024/05/10 | Kp9 (G5) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| May 2024 | 139.8 +3.3 |
| Last 30 days | 170.5 +79.6 |