Viewing archive of Tuesday, 3 May 2011
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 2011 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 2011IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z Solar activity was low. A single C-class x-ray flare
occurred from Region 1204 (N17E26) at 03/1052Z. A new region, 1206
(N22W18), was numbered and identified with a simple Beta magnetic
classification. A 20 degree filament erupted from N28W64 at around
14Z. A concurrent CME was observed off the northwest quadrant of the
sun on NASA SOHO LASCO C2/C3 coronagraphs as well as on STEREO A/B
coronagraphs, but does not appear to be Earth directed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next 3 days (4-6 May).
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
The geomagnetic field ranged from active to quiet as coronal hole
(CH) high-speed stream (HSS) effects continued to decline. The
greater than 2 MeV electron flux at geosynchronous orbit was at high
levels throughout the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for the next 3 days (4-6 May).
III. Event Probabilities 04 May to 06 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 03 May 107 Predicted 04 May-06 May 110/110/110 90 Day Mean 03 May 109
V. Geomagnetic A Indices
Observed Afr/Ap 02 May 014/020 Estimated Afr/Ap 03 May 010/015 Predicted Afr/Ap 04 May-06 May 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 04 May to 06 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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