Viewing archive of Thursday, 9 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 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 129 Issued at 2200Z on 09 May 2013IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z
Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C3 event observed at
09/0523Z from Region 1736 (S08W78). There are currently 9 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on day one (10 May) and likely to be low
with a slight chance for an M-class flare on days two and three (11 May,
12 May).
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
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 529 km/s at
09/0005Z. Electrons greater than 2 MeV at geosynchronous orbit reached a
peak level of 749 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one and two (10 May, 11 May) and quiet to
unsettled levels on day three (12 May).
III. Event Probabilities 10 May to 12 May
| Class M | 35% | 20% | 20% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 May 128 Predicted 10 May-12 May 125/115/115 90 Day Mean 09 May 117
V. Geomagnetic A Indices
Observed Afr/Ap 08 May 008/008 Estimated Afr/Ap 09 May 005/005 Predicted Afr/Ap 10 May-12 May 005/005-005/005-005/008
VI. Geomagnetic Activity Probabilities 10 May to 12 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 25% |
| Major-severe storm | 10% | 10% | 20% |
All times in UTC
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