Viewing archive of Monday, 9 December 2013
Solar activity report
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 343 Issued at 2200Z on 09 Dec 2013IA. 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 Dec to 12 Dec
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Dec 168 Predicted 10 Dec-12 Dec 170/175/172 90 Day Mean 09 Dec 133
V. Geomagnetic A Indices
Observed Afr/Ap 08 Dec 014/017 Estimated Afr/Ap 09 Dec 004/005 Predicted Afr/Ap 10 Dec-12 Dec 009/010-007/008-006/005
VI. Geomagnetic Activity Probabilities 10 Dec to 12 Dec
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 05% | 05% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 20% | 15% |
| Major-severe storm | 35% | 10% | 05% |
All times in UTC
Latest news
X4.0 solar flare
X5.1 solar flare, G4 geomagnetic storm watch
X1.2 solar flare with earth-directed CME
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Latest alerts
Friday, 14 November 2025
21:51 UTC - Solar flare
Moderate M1.33 flare from sunspot region 4274
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Minor R1 radio blackout in progress (≥M1 - current: M1.33)
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| Spotless days | |
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| Monthly mean Sunspot Number | |
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