Viewing archive of Monday, 15 April 2013
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 2013 Apr 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 105 Issued at 2200Z on 15 Apr 2013IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
15/1403Z from Region 1723 (S18E20). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on day one (16 Apr) and expected to be low
with a slight chance for an M-class flare on day two (17 Apr) and likely
to be low on day three (18 Apr).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
541 km/s at 14/2245Z. Total IMF reached 12 nT at 14/2153Z. The maximum
southward component of Bz reached -4 nT at 15/2058Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (16 Apr, 17 Apr, 18
Apr).
III. Event Probabilities 16 Apr to 18 Apr
| Class M | 25% | 15% | 05% |
| Class X | 05% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Apr 113 Predicted 16 Apr-18 Apr 110/105/100 90 Day Mean 15 Apr 112
V. Geomagnetic A Indices
Observed Afr/Ap 14 Apr 010/010 Estimated Afr/Ap 15 Apr 005/005 Predicted Afr/Ap 16 Apr-18 Apr 005/005-005/005-004/005
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 | 20% | 15% | 15% |
| Major-severe storm | 10% | 05% | 10% |
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