Viewing archive of Friday, 20 March 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 Mar 20 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 079 Issued at 2200Z on 20 Mar 2009IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity was very low. The visible disk remains
spotless. No flares were observed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
Geomagnetic field activity was at quiet levels. The solar wind speed
has increased from 290 to 380 Km/sec due to a coronal hole high
speed stream. The Bz has ranged from -5 to +7nT.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be quiet to unsettled for day one (21 March). Activity
will return to quiet for days two and three (22-23 March).
III. Event Probabilities 21 Mar to 23 Mar
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Mar 069 Predicted 21 Mar-23 Mar 070/070/070 90 Day Mean 20 Mar 070
V. Geomagnetic A Indices
Observed Afr/Ap 19 Mar 003/003 Estimated Afr/Ap 20 Mar 003/004 Predicted Afr/Ap 21 Mar-23 Mar 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 21 Mar to 23 Mar
| 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% |
All times in UTC
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| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
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