Viewing archive of Sunday, 12 April 2015
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 2015 Apr 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 102 Issued at 2200Z on 12 Apr 2015IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z
Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
12/0950Z from Region 2321 (N13E54). There are currently 4 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(13 Apr, 14 Apr, 15 Apr).
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 395 km/s at
11/2252Z. Total IMF reached 6 nT at 12/1339Z. The maximum southward
component of Bz reached -2 nT at 11/2116Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (13 Apr, 14 Apr, 15
Apr).
III. Event Probabilities 13 Apr to 15 Apr
| Class M | 55% | 55% | 55% |
| Class X | 20% | 20% | 20% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 12 Apr 134 Predicted 13 Apr-15 Apr 135/135/130 90 Day Mean 12 Apr 128
V. Geomagnetic A Indices
Observed Afr/Ap 11 Apr 014/021 Estimated Afr/Ap 12 Apr 004/005 Predicted Afr/Ap 13 Apr-15 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 13 Apr to 15 Apr
| 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 | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 10% |
All times in UTC
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