Viewing archive of Wednesday, 9 May 2012
Solar activity report
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 130 Issued at 2200Z on 09 May 2012IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z
IB. Solar Activity Forecast
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
IIB. Geophysical Activity Forecast
III. Event Probabilities 10 May to 12 May
| Class M | 65% | 65% | 65% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 09 May 127 Predicted 10 May-12 May 130/130/130 90 Day Mean 09 May 113
V. Geomagnetic A Indices
Observed Afr/Ap 08 May 008/008 Estimated Afr/Ap 09 May 017/021 Predicted Afr/Ap 10 May-12 May 015/022-013/015-007/010
VI. Geomagnetic Activity Probabilities 10 May to 12 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 15% | 10% |
| Minor storm | 15% | 05% | 01% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 25% | 25% |
| Major-severe storm | 50% | 25% | 10% |
All times in UTC
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Oulu, Rovaniemi, Sodankylä, UtsjokiReykjavik
Kirkenes, Tromsø, Trondheim
Murmansk, Vorkuta
Kiruna, Luleå
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Latest alerts
Coronal hole faces Earth
The anticipated strong G3 geomagnetic storm watch never materialized as the coronal mass ejection that was supposed to arrive early yesterday didn't arrive until today just past midnight UTC. The impact was very lackluster with the Bt (total strength of the IMF) increasing to a moderate 15nT at best and the solar wind speed reaching just 420km/s. A far cry from the anticipated 700 to 800km/s. That once again goes to show how hard it is to forecast space weather events and any resulting geomagnetic conditions. We remain under the influence of the CME and high latitude sky watchers should remain alert for some nice aurora displays but middle latitude sky watchers will probably have to wait for the next opportunity.
13:55 UTC - Coronal hole
A transequatorial coronal hole is facing Earth. Enhanced solar wind could arrive in ~3 days
02:45 UTC - Geomagnetic activity
Active geomagnetic conditions (Kp4) Threshold Reached: 02:33 UTC
Saturday, 22 March 2025
23:45 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 23:37 UTC
Space weather facts
| Last X-flare | 2025/02/23 | X2.0 |
| Last M-flare | 2025/03/21 | M1.2 |
| Last geomagnetic storm | 2025/03/22 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| March 2025 | 140.6 -14 |
| Last 30 days | 138.7 -14.7 |