Viewing archive of Thursday, 15 October 2009
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 2009 Oct 15 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 288 Issued at 2200Z on 15 Oct 2009IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z Solar activity was very low. No flares were observed.
The visible disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
The geomagnetic field was quiet. At approximately 15/0500Z, ACE
satellite measurements observed increases in temperature, density
and velocity, all indicative of a CIR in advance of a weak coronal
hole wind stream. Wind speeds increased from a low of about 300
km/s to near 430 km/s, while the Bz component of the IMF indicated a
weak southward trend of near -5 nT.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at quiet to unsettled levels on day 1 (16 October) as
the equatorward extension of the northern crown coronal hole
continues to influence the field. Activity is expected to be mostly
quiet on days 2 and 3 (17 - 18 October) as coronal hole effects
wane.
III. Event Probabilities 16 Oct to 18 Oct
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 15 Oct 070 Predicted 16 Oct-18 Oct 072/072/072 90 Day Mean 15 Oct 069
V. Geomagnetic A Indices
Observed Afr/Ap 14 Oct 000/002 Estimated Afr/Ap 15 Oct 005/007 Predicted Afr/Ap 16 Oct-18 Oct 007/007-005/005-005/005
VI. Geomagnetic Activity Probabilities 16 Oct to 18 Oct
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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