Viewing archive of Wednesday, 28 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 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 088 Issued at 2200Z on 28 Mar 2012IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity has been at very low levels. There were
four B-class flares over the past 24 hours. Latest images show a new
front-sided CME near the end of the period associated with a
filament eruption.
IB. Solar Activity Forecast
Solar activity is expected to be low
with a chance for an isolated M-flare. Old Region 1429 (N19, L=299)
is expected to rotate onto the solar disk midday on 29 March, which
should increase M-class flare probabilities. New Region 1448
(S18E55) was numbered today and is an A-class spot group.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was at unsettled to active levels early in the
period, but dropped to quiet levels over the later part of the
period. ACE data indicated an increase in solar wind speeds and a
drop in density consistent with effects from a favorably positioned
negative polarity coronal hole.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled for 29 March due to persistence.
Quiet levels are expected for days two and three (30 and 31 March).
III. Event Probabilities 29 Mar to 31 Mar
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Mar 107 Predicted 29 Mar-31 Mar 110/115/120 90 Day Mean 28 Mar 119
V. Geomagnetic A Indices
Observed Afr/Ap 27 Mar 015/015 Estimated Afr/Ap 28 Mar 012/013 Predicted Afr/Ap 29 Mar-31 Mar 007/010-006/005-006/005
VI. Geomagnetic Activity Probabilities 29 Mar to 31 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 30% | 15% | 15% |
| Major-severe storm | 15% | 05% | 05% |
All times in UTC
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