Viewing archive of Sunday, 26 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 26 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 330 Issued at 2200Z on 26 Nov 2017IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z 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 (27
Nov, 28 Nov, 29 Nov).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 493 km/s at 26/1355Z. Total IMF reached 8 nT at
26/2041Z. The maximum southward component of Bz reached -4 nT at
26/1331Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 428 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (27 Nov, 28 Nov) and
quiet to minor storm levels on day three (29 Nov).
III. Event Probabilities 27 Nov to 29 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Nov 076 Predicted 27 Nov-29 Nov 076/076/076 90 Day Mean 26 Nov 081
V. Geomagnetic A Indices
Observed Afr/Ap 25 Nov 004/006 Estimated Afr/Ap 26 Nov 003/004 Predicted Afr/Ap 27 Nov-29 Nov 011/015-011/012-015/020
VI. Geomagnetic Activity Probabilities 27 Nov to 29 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 40% |
| Minor storm | 15% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 30% | 35% | 30% |
| Major-severe storm | 50% | 40% | 50% |
All times in UTC
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