Viewing archive of Sunday, 25 October 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 Oct 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 298 Issued at 2200Z on 25 Oct 2015IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
24/2130Z from Region 2434 (S11W89). 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 (26 Oct,
27 Oct, 28 Oct).
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, as measured by the ACE spacecraft, reached a peak speed of
537 km/s at 25/0109Z. Total IMF reached 12 nT at 24/2318Z. The maximum
southward component of Bz reached -3 nT at 24/2118Z. 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 quiet to active levels on day one (26 Oct), quiet levels on day
two (27 Oct) and quiet to unsettled levels on day three (28 Oct).
III. Event Probabilities 26 Oct to 28 Oct
| Class M | 20% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Oct 106 Predicted 26 Oct-28 Oct 105/105/105 90 Day Mean 25 Oct 103
V. Geomagnetic A Indices
Observed Afr/Ap 24 Oct 010/010 Estimated Afr/Ap 25 Oct 009/009 Predicted Afr/Ap 26 Oct-28 Oct 009/010-006/005-007/008
VI. Geomagnetic Activity Probabilities 26 Oct to 28 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 20% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 20% |
| Minor storm | 25% | 15% | 25% |
| Major-severe storm | 25% | 10% | 25% |
All times in UTC
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