Viewing archive of Monday, 31 May 2010
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 2010 May 31 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 151 Issued at 2200Z on 31 May 2010IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 31-2100Z Solar activity was very low. New Region 1076 (S19E07)
was numbered today and is a beta magnetic classification. No flares
were observed during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 30-2100Z to 31-2100Z
The geomagnetic field was at quiet to active levels with one
reporting period at 30/2100Z of minor storm conditions.
Observations from the ACE spacecraft indicate the continued
influence from the coronal hole high speed stream. Solar wind
speeds have increased through the period from 500 km/s to above 600
km/s with IMF Bz fluctuations of +/- 6 nT. The greater than 2 MeV
electron flux at geosynchronous orbit was at high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly unsettled with isolated active
conditions for the next three days (01-03 June) due to the coronal
hole high speed stream.
III. Event Probabilities 01 Jun to 03 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 31 May 072 Predicted 01 Jun-03 Jun 072/072/072 90 Day Mean 31 May 078
V. Geomagnetic A Indices
Observed Afr/Ap 30 May 014/019 Estimated Afr/Ap 31 May 016/022 Predicted Afr/Ap 01 Jun-03 Jun 010/010-008/010-008/008
VI. Geomagnetic Activity Probabilities 01 Jun to 03 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 20% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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