Viewing archive of Thursday, 20 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 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 51 Issued at 2200Z on 20 Feb 2014IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z 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
20/0756Z from Region 1976 (S14W82). 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 (21 Feb, 22 Feb,
23 Feb).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to major storm levels for the past 24 hours.
Solar wind speed, as measured by the ACE spacecraft, reached a peak
speed of 743 km/s at 20/0440Z. Total IMF reached 16 nT at 20/0323Z. The
maximum southward component of Bz reached -14 nT at 20/0507Z. Protons
greater than 10 MeV at geosynchronous orbit reached a peak level of 22
pfu at 20/0925Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (21 Feb) and quiet to
active levels on days two and three (22 Feb, 23 Feb).
III. Event Probabilities 21 Feb to 23 Feb
| Class M | 35% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Feb 156 Predicted 21 Feb-23 Feb 155/160/165 90 Day Mean 20 Feb 155
V. Geomagnetic A Indices
Observed Afr/Ap 19 Feb 030/042 Estimated Afr/Ap 20 Feb 025/038 Predicted Afr/Ap 21 Feb-23 Feb 015/020-013/012-012/012
VI. Geomagnetic Activity Probabilities 21 Feb to 23 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 30% |
| Minor storm | 20% | 10% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 30% | 30% |
| Major-severe storm | 50% | 40% | 40% |
All times in UTC
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