Viewing archive of Sunday, 14 September 2014
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 2014 Sep 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 257 Issued at 2200Z on 14 Sep 2014IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z 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
14/0216Z from Region 2157 (S15W63). There are currently 6 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one and two (15 Sep, 16 Sep) and expected to be low with a slight
chance for an M-class flare on day three (17 Sep).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
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 626 km/s at
14/0101Z. Total IMF reached 10 nT at 13/2127Z. The maximum southward
component of Bz reached -2 nT at 14/1536Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (15 Sep), quiet to active levels on day
two (16 Sep) and quiet to unsettled levels on day three (17 Sep).
Protons greater than 10 Mev have a slight chance of crossing threshold
on days one and two (15 Sep, 16 Sep).
III. Event Probabilities 15 Sep to 17 Sep
| Class M | 50% | 50% | 20% |
| Class X | 15% | 15% | 05% |
| Proton | 15% | 15% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Sep 139 Predicted 15 Sep-17 Sep 138/135/130 90 Day Mean 14 Sep 130
V. Geomagnetic A Indices
Observed Afr/Ap 13 Sep 013/010 Estimated Afr/Ap 14 Sep 004/004 Predicted Afr/Ap 15 Sep-17 Sep 005/005-008/010-007/008
VI. Geomagnetic Activity Probabilities 15 Sep to 17 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 30% | 15% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 25% | 40% | 25% |
All times in UTC
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