Viewing archive of Tuesday, 24 October 2017
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 2017 Oct 24 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 297 Issued at 2200Z on 24 Oct 2017IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z
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 (25
Oct, 26 Oct, 27 Oct).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic
field has been at quiet to minor storm levels for the past 24 hours.
Solar wind speed reached a peak of 641 km/s at 24/2012Z. Total IMF
reached 15 nT at 24/1140Z. The maximum southward component of Bz reached
-9 nT at 24/1017Z. Electrons greater than 2 MeV at geosynchronous orbit
reached a peak level of 2102 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at active to major storm levels on day one (25 Oct), unsettled to
minor storm levels on day two (26 Oct) and unsettled to active levels on
day three (27 Oct).
III. Event Probabilities 25 Oct to 27 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Oct 078 Predicted 25 Oct-27 Oct 078/077/077 90 Day Mean 24 Oct 082
V. Geomagnetic A Indices
Observed Afr/Ap 23 Oct 003/004 Estimated Afr/Ap 24 Oct 016/021 Predicted Afr/Ap 25 Oct-27 Oct 028/045-023/035-014/018
VI. Geomagnetic Activity Probabilities 25 Oct to 27 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 35% |
| Minor storm | 35% | 25% | 15% |
| Major-severe storm | 20% | 15% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 15% |
| Minor storm | 15% | 25% | 25% |
| Major-severe storm | 75% | 55% | 40% |
All times in UTC
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