Viewing archive of Friday, 3 May 2013
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 2013 May 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 123 Issued at 2200Z on 03 May 2013IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a M5 event observed at
03/1732Z from Region 1739 (N13E75). There are currently 8 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
(04 May, 05 May, 06 May).
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
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 482 km/s at
02/2141Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 1905 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and three (04 May, 06
May) and quiet to active levels on day two (05 May). Protons have a
slight chance of crossing threshold on days one, two, and three (04 May,
05 May, 06 May).
III. Event Probabilities 04 May to 06 May
| Class M | 55% | 55% | 55% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 03 May 148 Predicted 04 May-06 May 155/155/150 90 Day Mean 03 May 115
V. Geomagnetic A Indices
Observed Afr/Ap 02 May 011/013 Estimated Afr/Ap 03 May 006/006 Predicted Afr/Ap 04 May-06 May 008/008-010/012-007/008
VI. Geomagnetic Activity Probabilities 04 May to 06 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 10% |
| Minor storm | 01% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 20% |
| Minor storm | 20% | 25% | 20% |
| Major-severe storm | 10% | 25% | 10% |
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