Viewing archive of Tuesday, 14 April 2015
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 2015 Apr 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 104 Issued at 2200Z on 14 Apr 2015IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
13/2323Z from Region 2320 (S14W78). There are currently 6 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
(15 Apr, 16 Apr, 17 Apr).
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
358 km/s at 14/1432Z. Total IMF reached 11 nT at 14/1523Z. The maximum
southward component of Bz reached -11 nT at 14/1523Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at unsettled to minor storm levels on day one (15 Apr), quiet to
minor storm levels on day two (16 Apr) and quiet levels on day three (17
Apr).
III. Event Probabilities 15 Apr to 17 Apr
| Class M | 55% | 55% | 55% |
| Class X | 20% | 20% | 20% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 14 Apr 147 Predicted 15 Apr-17 Apr 150/155/155 90 Day Mean 14 Apr 128
V. Geomagnetic A Indices
Observed Afr/Ap 13 Apr 012/008 Estimated Afr/Ap 14 Apr 004/005 Predicted Afr/Ap 15 Apr-17 Apr 015/020-012/015-007/008
VI. Geomagnetic Activity Probabilities 15 Apr to 17 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 20% |
| Minor storm | 15% | 15% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 50% | 45% | 25% |
All times in UTC
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