Viewing archive of Monday, 15 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 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 258 Issued at 2200Z on 15 Sep 2014IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
15/0027Z from Region 2157 (S15W74). 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 (16 Sep, 17 Sep) and expected to be low with a chance
for M-class flares on day three (18 Sep).
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
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 509 km/s at
14/2318Z. Total IMF reached 5 nT at 14/2335Z. The maximum southward
component of Bz reached -1 nT at 15/0808Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (16 Sep), quiet to active levels on day
two (17 Sep) and quiet to unsettled levels on day three (18 Sep).
Protons greater than 10 Mev have a slight chance of crossing threshold
on day one (16 Sep) and have a slight chance of crossing threshold on
day two (17 Sep).
III. Event Probabilities 16 Sep to 18 Sep
| Class M | 50% | 40% | 30% |
| Class X | 15% | 10% | 05% |
| Proton | 15% | 10% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Sep 133 Predicted 16 Sep-18 Sep 130/125/125 90 Day Mean 15 Sep 130
V. Geomagnetic A Indices
Observed Afr/Ap 14 Sep 003/003 Estimated Afr/Ap 15 Sep 004/004 Predicted Afr/Ap 16 Sep-18 Sep 006/005-008/012-008/008
VI. Geomagnetic Activity Probabilities 16 Sep to 18 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 35% | 15% |
| Minor storm | 01% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 30% | 25% |
| Major-severe storm | 20% | 50% | 25% |
All times in UTC
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