Viewing archive of Monday, 27 March 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 Mar 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 86 Issued at 2200Z on 27 Mar 2017IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z 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
27/1820Z from Region 2645 (S09E59). 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 and two (28 Mar, 29 Mar)
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 three (30 Mar).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed reached a peak of 720 km/s at 27/2010Z. Total IMF
reached 19 nT at 27/0752Z. The maximum southward component of Bz reached
-14 nT at 27/0827Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 7934 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at active to major storm levels on day one (28 Mar), unsettled to
major storm levels on day two (29 Mar) and unsettled to minor storm
levels on day three (30 Mar).
III. Event Probabilities 28 Mar to 30 Mar
| Class M | 15% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Mar 083 Predicted 28 Mar-30 Mar 084/083/082 90 Day Mean 27 Mar 076
V. Geomagnetic A Indices
Observed Afr/Ap 26 Mar 003/002 Estimated Afr/Ap 27 Mar 030/059 Predicted Afr/Ap 28 Mar-30 Mar 029/040-025/035-020/024
VI. Geomagnetic Activity Probabilities 28 Mar to 30 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 35% |
| Minor storm | 35% | 30% | 20% |
| Major-severe storm | 15% | 15% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 20% | 25% | 25% |
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