Viewing archive of Friday, 21 October 2016
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 2016 Oct 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 295 Issued at 2200Z on 21 Oct 2016IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 2 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a slight chance for a C-class flare on days one, two, and three (22
Oct, 23 Oct, 24 Oct).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 426 km/s at 20/2213Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 26846 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (22 Oct), unsettled to
minor storm levels on day two (23 Oct) and active to major storm levels
on day three (24 Oct).
III. Event Probabilities 22 Oct to 24 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Oct 078 Predicted 22 Oct-24 Oct 075/075/072 90 Day Mean 21 Oct 086
V. Geomagnetic A Indices
Observed Afr/Ap 20 Oct 005/001 Estimated Afr/Ap 21 Oct 003/004 Predicted Afr/Ap 22 Oct-24 Oct 016/022-018/024-027/040
VI. Geomagnetic Activity Probabilities 22 Oct to 24 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 45% |
| Minor storm | 10% | 10% | 25% |
| Major-severe storm | 01% | 01% | 10% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 20% |
| Minor storm | 20% | 20% | 25% |
| Major-severe storm | 40% | 30% | 35% |
All times in UTC
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| Last X-flare | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/23 | M8.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
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| Last 30 days | 114.4 -44.3 |