Viewing archive of Tuesday, 25 February 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 Feb 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 56 Issued at 2200Z on 25 Feb 2014IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X4 event observed at
25/0049Z from Region 1990 (S12E64). There are currently 7 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a chance for X-class flares on days one, two, and three (26 Feb, 27
Feb, 28 Feb).
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 489 km/s at
25/0159Z. Protons greater than 10 MeV at geosynchronous orbit reached a
peak level of 23 pfu at 25/2020Z. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 143 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on day one (26 Feb) and quiet to
active levels on days two and three (27 Feb, 28 Feb). Protons are
expected to cross threshold on day one (26 Feb), are likely to cross
threshold on day two (27 Feb) and have a chance of crossing threshold on
day three (28 Feb).
III. Event Probabilities 26 Feb to 28 Feb
| Class M | 70% | 70% | 70% |
| Class X | 30% | 30% | 30% |
| Proton | 90% | 60% | 50% |
| PCAF | yellow | ||
IV. Penticton 10.7 cm Flux
Observed 25 Feb 174 Predicted 26 Feb-28 Feb 180/180/180 90 Day Mean 25 Feb 157
V. Geomagnetic A Indices
Observed Afr/Ap 24 Feb 005/005 Estimated Afr/Ap 25 Feb 005/005 Predicted Afr/Ap 26 Feb-28 Feb 007/008-011/012-012/015
VI. Geomagnetic Activity Probabilities 26 Feb to 28 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 25% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 25% | 25% | 35% |
All times in UTC
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