Viewing archive of Friday, 27 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 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 58 Issued at 2200Z on 27 Feb 2015IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 3 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 (28 Feb,
01 Mar, 02 Mar).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
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 379 km/s at
26/2142Z. Total IMF reached 6 nT at 27/0408Z. The maximum southward
component of Bz reached -3 nT at 27/2037Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 366 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (28 Feb) and unsettled
to minor storm levels on days two and three (01 Mar, 02 Mar).
III. Event Probabilities 28 Feb to 02 Mar
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Feb 118 Predicted 28 Feb-02 Mar 120/120/120 90 Day Mean 27 Feb 144
V. Geomagnetic A Indices
Observed Afr/Ap 26 Feb 005/003 Estimated Afr/Ap 27 Feb 003/005 Predicted Afr/Ap 28 Feb-02 Mar 012/018-016/022-018/020
VI. Geomagnetic Activity Probabilities 28 Feb to 02 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 40% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 60% | 60% | 60% |
All times in UTC
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