Viewing archive of Wednesday, 16 May 2012
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 2012 May 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 137 Issued at 2200Z on 16 May 2012IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z Solar activity was low. Region 1476 (N13W73) produced a
few C-class flares while continuing to decay. Regions 1482 (N13E10)
and 1484 (N09E38) also produced a few low level C-class events. A
pair of CMEs associated with apparent filament eruptions were
observed in LASCO C2/C3, but neither appear to be earth directed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next 3 days (17-19 May).
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
The geomagnetic field was mostly quiet. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB. Geophysical Activity Forecast
With the exception of an
isolated unsettled or active period early on day 1 (17 May) from an
expected solar sector boundary crossing, geomagnetic field
conditions are expected to be mostly quiet throughout the period
(17-19 May).
III. Event Probabilities 17 May to 19 May
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 16 May 131 Predicted 17 May-19 May 130/130/130 90 Day Mean 16 May 115
V. Geomagnetic A Indices
Observed Afr/Ap 15 May 005/005 Estimated Afr/Ap 16 May 007/008 Predicted Afr/Ap 17 May-19 May 004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 17 May to 19 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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