Viewing archive of Wednesday, 23 October 2013
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 2013 Oct 23 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 296 Issued at 2200Z on 23 Oct 2013IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M4 event observed at
22/2120Z from Region 1875 (N07E04). There are currently 5 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (24 Oct, 25 Oct,
26 Oct).
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed,
as measured by the ACE spacecraft, reached a peak speed of 389 km/s at
23/0440Z. Total IMF reached 7 nT at 22/2118Z. The maximum southward
component of Bz reached -5 nT at 23/0750Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 679 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (24 Oct, 26
Oct) and active levels on day two (25 Oct).
III. Event Probabilities 24 Oct to 26 Oct
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Oct 153 Predicted 24 Oct-26 Oct 160/165/160 90 Day Mean 23 Oct 113
V. Geomagnetic A Indices
Observed Afr/Ap 22 Oct 003/004 Estimated Afr/Ap 23 Oct 005/005 Predicted Afr/Ap 24 Oct-26 Oct 013/015-020/025-013/015
VI. Geomagnetic Activity Probabilities 24 Oct to 26 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 40% | 30% |
| Minor storm | 10% | 15% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 20% | 20% |
| Major-severe storm | 40% | 30% | 35% |
All times in UTC
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