Viewing archive of Thursday, 31 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 31 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 304 Issued at 2200Z on 31 Oct 2013IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M1 event observed at
31/1351Z from Region 1877 (S13W95). There are currently 7 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 (01 Nov, 02 Nov,
03 Nov).
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
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
482 km/s at 31/1631Z. Total IMF reached 12 nT at 31/1106Z. The maximum
southward component of Bz reached -8 nT at 31/1840Z. Protons greater
than 10 MeV at geosynchronous orbit reached a peak level of 2 pfu at
30/2115Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (01 Nov, 02 Nov, 03
Nov).
III. Event Probabilities 01 Nov to 03 Nov
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 31 Oct 143 Predicted 01 Nov-03 Nov 140/140/135 90 Day Mean 31 Oct 117
V. Geomagnetic A Indices
Observed Afr/Ap 30 Oct 010/013 Estimated Afr/Ap 31 Oct 011/015 Predicted Afr/Ap 01 Nov-03 Nov 006/005-005/005-006/005
VI. Geomagnetic Activity Probabilities 01 Nov to 03 Nov
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 15% | 10% | 10% |
All times in UTC
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