Viewing archive of Saturday, 18 November 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 Nov 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 322 Issued at 2200Z on 18 Nov 2017IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 1 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 (19
Nov, 20 Nov, 21 Nov).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 470 km/s at 18/0506Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 2355 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to active levels on days one, two, and three (19 Nov,
20 Nov, 21 Nov).
III. Event Probabilities 19 Nov to 21 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Nov 076 Predicted 19 Nov-21 Nov 075/075/075 90 Day Mean 18 Nov 082
V. Geomagnetic A Indices
Observed Afr/Ap 17 Nov 005/004 Estimated Afr/Ap 18 Nov 007/008 Predicted Afr/Ap 19 Nov-21 Nov 013/018-013/018-013/018
VI. Geomagnetic Activity Probabilities 19 Nov to 21 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 40% |
| Minor storm | 15% | 20% | 20% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 35% | 40% | 40% |
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