Viewing archive of Saturday, 18 October 2014
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 2014 Oct 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 291 Issued at 2200Z on 18 Oct 2014IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z
Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
18/0758Z from Region 2192 (S13E56). There are currently 3 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(19 Oct, 20 Oct, 21 Oct).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
532 km/s at 18/0615Z. Total IMF reached 8 nT at 18/1905Z. The maximum
southward component of Bz reached -7 nT at 17/2347Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 458 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (19 Oct, 20 Oct)
and quiet to active levels on day three (21 Oct).
III. Event Probabilities 19 Oct to 21 Oct
| Class M | 55% | 55% | 55% |
| Class X | 15% | 15% | 15% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Oct 160 Predicted 19 Oct-21 Oct 165/170/175 90 Day Mean 18 Oct 132
V. Geomagnetic A Indices
Observed Afr/Ap 17 Oct 006/008 Estimated Afr/Ap 18 Oct 010/012 Predicted Afr/Ap 19 Oct-21 Oct 008/010-010/012-013/015
VI. Geomagnetic Activity Probabilities 19 Oct to 21 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 30% | 30% | 40% |
All times in UTC
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