Viewing archive of Sunday, 20 October 2013
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 2013 Oct 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 293 Issued at 2200Z on 20 Oct 2013IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
20/0840Z from Region 1868 (N23W44). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (21 Oct, 22 Oct,
23 Oct).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
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 330 km/s at
20/1236Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 2723 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (21 Oct, 22 Oct)
and quiet levels on day three (23 Oct).
III. Event Probabilities 21 Oct to 23 Oct
| Class M | 25% | 25% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Oct 133 Predicted 21 Oct-23 Oct 130/125/120 90 Day Mean 20 Oct 112
V. Geomagnetic A Indices
Observed Afr/Ap 19 Oct 003/002 Estimated Afr/Ap 20 Oct 004/004 Predicted Afr/Ap 21 Oct-23 Oct 009/010-008/008-006/005
VI. Geomagnetic Activity Probabilities 21 Oct to 23 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 15% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 20% | 20% | 10% |
All times in UTC
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