Viewing archive of Thursday, 6 April 2017
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 2017 Apr 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 96 Issued at 2200Z on 06 Apr 2017IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C5 event observed at
06/1210Z from Region 2645 (S10W79). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be low with a
slight chance for an M-class flare on day one (07 Apr) and expected to
be very low with a chance for a C-class flares and a slight chance for
an M-class flare on day two (08 Apr) and expected to be very low with a
slight chance for a C-class flare on day three (09 Apr).
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 518 km/s at 06/0610Z. Total IMF reached 8
nT at 05/2106Z. The maximum southward component of Bz reached -5 nT at
06/1338Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 241 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (07 Apr, 08 Apr)
and quiet levels on day three (09 Apr). Protons greater than 10 Mev have
a slight chance of crossing threshold on days one and two (07 Apr, 08
Apr).
III. Event Probabilities 07 Apr to 09 Apr
| Class M | 20% | 10% | 01% |
| Class X | 05% | 01% | 01% |
| Proton | 10% | 10% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 06 Apr 076 Predicted 07 Apr-09 Apr 072/070/070 90 Day Mean 06 Apr 078
V. Geomagnetic A Indices
Observed Afr/Ap 05 Apr 010/008 Estimated Afr/Ap 06 Apr 008/008 Predicted Afr/Ap 07 Apr-09 Apr 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 07 Apr to 09 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 10% |
| Major-severe storm | 10% | 10% | 05% |
All times in UTC
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