Viewing archive of Tuesday, 18 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 18 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 49 Issued at 2200Z on 18 Feb 2014IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C4 event observed at
18/0133Z from Region 1976 (S15W56). There are currently 8 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 (19 Feb, 20 Feb,
21 Feb).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
441 km/s at 18/1019Z. Total IMF reached 8 nT at 18/2031Z. The maximum
southward component of Bz reached -8 nT at 18/2057Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (19 Feb, 20 Feb) and quiet to
active levels on day three (21 Feb).
III. Event Probabilities 19 Feb to 21 Feb
| Class M | 45% | 35% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Feb 151 Predicted 19 Feb-21 Feb 140/135/135 90 Day Mean 18 Feb 154
V. Geomagnetic A Indices
Observed Afr/Ap 17 Feb 004/004 Estimated Afr/Ap 18 Feb 005/005 Predicted Afr/Ap 19 Feb-21 Feb 006/005-006/005-015/015
VI. Geomagnetic Activity Probabilities 19 Feb to 21 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 35% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 15% | 15% | 25% |
| Major-severe storm | 05% | 05% | 50% |
All times in UTC
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