Viewing archive of Sunday, 15 April 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 Apr 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 106 Issued at 2200Z on 15 Apr 2012IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity increased to low levels. Two low-level
C-class flares occurred from a source beyond the northeast limb.
Region 1459 (S16E64) produced occasional B-class flares while it
rotated more fully into view as a Dai-type group with a beta
magnetic classification. Region 1455 (N05W46) showed intermediate
spot development during the period and was classified as a Dsi-type
with a beta magnetic classification. Small Axx-type Region 1454
(S12W00) produced a B9 x-ray flare at 15/0908Z associated with a
slow partial-halo CME, which is not expected to be geoeffective. No
new regions were numbered.
IB. Solar Activity Forecast
Solar activity is expected to be low
through the period (16 - 18 April).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
Geomagnetic field activity decreased to mostly quiet levels. 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 at quiet levels during the period (16 - 18 April).
III. Event Probabilities 16 Apr to 18 Apr
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Apr 102 Predicted 16 Apr-18 Apr 100/100/100 90 Day Mean 15 Apr 113
V. Geomagnetic A Indices
Observed Afr/Ap 14 Apr 007/011 Estimated Afr/Ap 15 Apr 006/005 Predicted Afr/Ap 16 Apr-18 Apr 004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 16 Apr to 18 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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