Viewing archive of Tuesday, 28 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 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 2017IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z 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 expected to be very low
with a chance for a C-class flares 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 unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 453 km/s at 28/0752Z. Total IMF reached 8
nT at 28/0754Z. The maximum southward component of Bz reached -5 nT at
28/0000Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 111 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 | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Feb 082 Predicted 01 Mar-03 Mar 082/082/081 90 Day Mean 28 Feb 077
V. Geomagnetic A Indices
Observed Afr/Ap 27 Feb 006/005 Estimated Afr/Ap 28 Feb 010/013 Predicted Afr/Ap 01 Mar-03 Mar 021/030-015/020-011/015
VI. Geomagnetic Activity Probabilities 01 Mar to 03 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 30% |
| Minor storm | 25% | 25% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 20% | 30% |
| Major-severe storm | 60% | 60% | 40% |
All times in UTC
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