Viewing archive of Wednesday, 21 March 2012
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 2012 Mar 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 081 Issued at 2200Z on 21 Mar 2012IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity was low. There were four C-class flares
with three of these originating from the newly emerging Region 1440
(S26W24). The largest was a C2 flare that occurred at 1252Z.
Region 1440 showed development throughout the day and appears to
have a small magnetic delta configuration in the trailing portion of
the group. There was a back-sided full halo CME from old Region
1429 that was observed in LASCO C2 imagery beginning at 21/0736Z.
This CME is not expected to be geoeffective.
IB. Solar Activity Forecast
Solar activity is expected to be low
with an slight chance for an isolated M-flare from Region 1440.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic field has been quiet. The greater than 2 MeV electron
flux at geosynchronous orbit was at high levels throughout the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for the next three days (22-24 March).
III. Event Probabilities 22 Mar to 24 Mar
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Mar 100 Predicted 22 Mar-24 Mar 095/090/090 90 Day Mean 21 Mar 122
V. Geomagnetic A Indices
Observed Afr/Ap 20 Mar 004/005 Estimated Afr/Ap 21 Mar 003/004 Predicted Afr/Ap 22 Mar-24 Mar 007/007-006/005-006/005
VI. Geomagnetic Activity Probabilities 22 Mar to 24 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
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