Viewing archive of Saturday, 25 February 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 Feb 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 56 Issued at 2200Z on 25 Feb 2017IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (26
Feb, 27 Feb, 28 Feb).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 594 km/s at 25/0253Z. Total IMF reached 5
nT at 25/1834Z. The maximum southward component of Bz reached -3 nT at
25/0105Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 1287 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (26 Feb), quiet levels on
day two (27 Feb) and quiet to active levels on day three (28 Feb).
III. Event Probabilities 26 Feb to 28 Feb
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Feb 080 Predicted 26 Feb-28 Feb 080/082/082 90 Day Mean 25 Feb 077
V. Geomagnetic A Indices
Observed Afr/Ap 24 Feb 015/017 Estimated Afr/Ap 25 Feb 006/006 Predicted Afr/Ap 26 Feb-28 Feb 008/008-005/005-010/012
VI. Geomagnetic Activity Probabilities 26 Feb to 28 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 25% |
| Minor storm | 05% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 20% | 30% |
| Major-severe storm | 20% | 10% | 40% |
All times in UTC
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