Viewing archive of Monday, 25 August 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 Aug 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 237 Issued at 2200Z on 25 Aug 2014IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
25/2021Z from Region 2146 (N09W46). There are currently 7 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(26 Aug, 27 Aug, 28 Aug).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
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 291 km/s at
24/2151Z. Total IMF reached 5 nT at 24/2227Z. The maximum southward
component of Bz reached -3 nT at 25/0910Z. Electrons greater than 2 MeV
at geosynchronous orbit reached a peak level of 261 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (26 Aug, 28 Aug)
and quiet to minor storm levels on day two (27 Aug). Protons have a
slight chance of crossing threshold on days one, two, and three (26 Aug,
27 Aug, 28 Aug).
III. Event Probabilities 26 Aug to 28 Aug
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Aug 152 Predicted 26 Aug-28 Aug 155/155/155 90 Day Mean 25 Aug 128
V. Geomagnetic A Indices
Observed Afr/Ap 24 Aug 005/005 Estimated Afr/Ap 25 Aug 005/005 Predicted Afr/Ap 26 Aug-28 Aug 011/012-017/020-010/012
VI. Geomagnetic Activity Probabilities 26 Aug to 28 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 30% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 15% | 20% | 30% |
All times in UTC
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