Viewing archive of Tuesday, 17 November 2015
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 2015 Nov 17 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 321 Issued at 2200Z on 17 Nov 2015IA. Analysis of Solar Active Regions and Activity from 16-2100Z to 17-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C1 event observed at
17/1554Z from Region 2454 (N05E12). There are currently 2 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on days one, two, and three (18 Nov,
19 Nov, 20 Nov).
IIA. Geophysical Activity Summary 16-2100Z to 17-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
387 km/s at 16/2335Z. Total IMF reached 7 nT at 17/1138Z. The maximum
southward component of Bz reached -4 nT at 17/2012Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 467 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (18 Nov), unsettled to
minor storm levels on day two (19 Nov) and quiet to unsettled levels on
day three (20 Nov).
III. Event Probabilities 18 Nov to 20 Nov
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 17 Nov 107 Predicted 18 Nov-20 Nov 108/108/106 90 Day Mean 17 Nov 106
V. Geomagnetic A Indices
Observed Afr/Ap 16 Nov 009/012 Estimated Afr/Ap 17 Nov 008/009 Predicted Afr/Ap 18 Nov-20 Nov 022/030-014/020-007/010
VI. Geomagnetic Activity Probabilities 18 Nov to 20 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 45% | 10% |
| Minor storm | 30% | 15% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 20% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 70% | 55% | 20% |
All times in UTC
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