Viewing archive of Saturday, 25 June 2005
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 2005 Jun 25 2210 UTC# Prepared jointly by the U.S. Dept. of Commerce, NOAA, #Space Environment Center and the U.S. Air Force. #
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 176 Issued at 2200Z on 25 Jun 2005IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity increased to low levels today. A C1
x-ray flare occurred in Region 780 (S07W43) at 25/0346Z. This
region continues to decay as white light depicts a two spot AXX
alpha group. There were several disappearing filaments reported
today near the time SOHO/LASCO imagery depicts a full halo CME.
Much of CME signature is believed to be back-sided, although there
is some evidence that the filament activity contributed to the
overall CME signature leaving the potential for an Earth directed
component. No new regions were numbered today.
IB. Solar Activity Forecast
Solar activity is expected to be at
very low levels.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was at quiet to unsettled levels. Showing weak
geoeffective consequences, the recurrent high speed coronal hole
stream has pushed the solar winds speeds to over 600 km/sec. The Bz
component of the interplanetary magnetic field has been
predominantly north throughout the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be at predominantly quiet to unsettled levels. Isolated
active conditions are possible on 26 June due to the high speed
stream and again on 28 June due to the potential effects from the
front-sided component of the CME activity seen today.
III. Event Probabilities 26 Jun to 28 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jun 077 Predicted 26 Jun-28 Jun 080/080/085 90 Day Mean 25 Jun 093
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jun 007/017 Estimated Afr/Ap 25 Jun 004/008 Predicted Afr/Ap 26 Jun-28 Jun 010/015-010/012-012/015
VI. Geomagnetic Activity Probabilities 26 Jun to 28 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 30% |
| Minor storm | 10% | 10% | 15% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 35% |
| Minor storm | 15% | 10% | 15% |
| Major-severe storm | 10% | 05% | 10% |
All times in UTC
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