Viewing archive of Monday, 20 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 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 2014IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M4 event observed at
20/1637Z from Region 2192 (S13E30). There are currently 4 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
(21 Oct, 22 Oct, 23 Oct).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 606 km/s at 20/1945Z. Total IMF reached 10 nT at 20/1616Z. The
maximum southward component of Bz reached -8 nT at 20/1641Z. Electrons
greater than 2 MeV at geosynchronous orbit reached a peak level of 296
pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (21 Oct), quiet to
active levels on day two (22 Oct) and quiet to unsettled levels on day
three (23 Oct). Protons have a slight chance of crossing threshold on
days one, two, and three (21 Oct, 22 Oct, 23 Oct).
III. Event Probabilities 21 Oct to 23 Oct
| Class M | 60% | 60% | 60% |
| Class X | 20% | 20% | 20% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Oct 185 Predicted 21 Oct-23 Oct 195/200/205 90 Day Mean 20 Oct 134
V. Geomagnetic A Indices
Observed Afr/Ap 19 Oct 009/009 Estimated Afr/Ap 20 Oct 010/012 Predicted Afr/Ap 21 Oct-23 Oct 015/018-013/015-013/015
VI. Geomagnetic Activity Probabilities 21 Oct to 23 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 25% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 25% | 30% | 30% |
| Major-severe storm | 45% | 40% | 40% |
All times in UTC
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