Viewing archive of Thursday, 28 June 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 Jun 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 180 Issued at 2200Z on 28 Jun 2012IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity increased to moderate levels. Region
1513 (N17E45) produced an impulsive M2/1b flare at 28/1612Z along
with occasional B- and C-class flares including a long-duration
C2/Sf at 28/1948Z. Region 1513 showed a minor increase in spot count
and an increase in magnetic complexity (beta-gamma). Region 1512
(S15W02) maintained its beta-gamma magnetic configuration, but
showed little change during the period. This region produced
occasional B- and C-class flares during the period. No new regions
were numbered. No Earth-directed coronal mass ejections occurred
during the period.
IB. Solar Activity Forecast
Solar activity is expected to be low
during the period (29 June - 01 July) with a chance for another
M-class flare.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
Geomagnetic field activity was at quiet to (briefly) unsettled
levels.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels on day 1 (29 June) with
a chance for active levels due to the arrival of a co-rotating
interaction region in advance of a recurrent coronal hole high-speed
stream (CH HSS). Field activity is expected to increase to unsettled
to active levels during days 2 - 3 (30 June - 01 July) with a chance
for minor storm levels due to CH HSS effects.
III. Event Probabilities 29 Jun to 01 Jul
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Jun 120 Predicted 29 Jun-01 Jul 115/115/120 90 Day Mean 28 Jun 118
V. Geomagnetic A Indices
Observed Afr/Ap 27 Jun 008/007 Estimated Afr/Ap 28 Jun 007/009 Predicted Afr/Ap 29 Jun-01 Jul 009/010-015/018-013/015
VI. Geomagnetic Activity Probabilities 29 Jun to 01 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 20% | 40% | 35% |
All times in UTC
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