Viewing archive of Saturday, 28 February 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 Feb 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 59 Issued at 2200Z on 28 Feb 2015IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z 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
28/0939Z from Region 2294 (S13W28). There are currently 4 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 days one, two, and three (01 Mar,
02 Mar, 03 Mar).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
466 km/s at 28/2054Z. Total IMF reached 14 nT at 28/2010Z. The maximum
southward component of Bz reached -11 nT at 28/1931Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 238 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on days one and two (01 Mar, 02
Mar) and unsettled to active levels on day three (03 Mar).
III. Event Probabilities 01 Mar to 03 Mar
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Feb 123 Predicted 01 Mar-03 Mar 130/130/125 90 Day Mean 28 Feb 144
V. Geomagnetic A Indices
Observed Afr/Ap 27 Feb 002/002 Estimated Afr/Ap 28 Feb 012/015 Predicted Afr/Ap 01 Mar-03 Mar 016/022-018/020-012/015
VI. Geomagnetic Activity Probabilities 01 Mar to 03 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 30% |
| Minor storm | 25% | 25% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 60% | 60% | 40% |
All times in UTC
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