Viewing archive of Sunday, 4 May 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 May 04 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 124 Issued at 2200Z on 04 May 2014IA. Analysis of Solar Active Regions and Activity from 03-2100Z to 04-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C9 event observed at
04/1231Z from Region 2051 (S09W64). 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 and a slight chance for an X-class flare on
days one and two (05 May, 06 May) and expected to be low with a chance
for M-class flares on day three (07 May).
IIA. Geophysical Activity Summary 03-2100Z to 04-2100Z
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
392 km/s at 04/1340Z. Total IMF reached 11 nT at 04/0509Z. The maximum
southward component of Bz reached -9 nT at 04/0526Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (05 May, 06 May)
and quiet to active levels on day three (07 May).
III. Event Probabilities 05 May to 07 May
| Class M | 40% | 40% | 35% |
| Class X | 10% | 10% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 04 May 132 Predicted 05 May-07 May 135/135/130 90 Day Mean 04 May 152
V. Geomagnetic A Indices
Observed Afr/Ap 03 May 005/006 Estimated Afr/Ap 04 May 014/017 Predicted Afr/Ap 05 May-07 May 008/008-007/008-010/012
VI. Geomagnetic Activity Probabilities 05 May to 07 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 30% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 20% | 20% | 40% |
All times in UTC
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