Viewing archive of Wednesday, 25 June 2008
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 2008 Jun 25 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 177 Issued at 2200Z on 25 Jun 2008IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was very low. No flares were observed
during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very
low for the next three days (26-28 June).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field has been quiet to active for the past 24 hours.
A small increase in the solar wind velocity at ACE was observed:
velocity reached approximately 450 km/s by the end of the period. Bz
fluctuated with values ranging up to +/- 10 nT during the past 24
hours. These signatures are consistent with a weak high speed stream
from a coronal hole. The greater than 2 MeV electron flux at
geosynchronous orbit was at high levels at the beginning of the
period and dropped below threshold at 24/2205Z.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with a chance of isolated active
periods during the next two days ( 26-27 June). The activity is
expected to decrease to quiet levels on the third day (28 June).
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 066 Predicted 26 Jun-28 Jun 066/066/066 90 Day Mean 25 Jun 069
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jun 003/004 Estimated Afr/Ap 25 Jun 010/010 Predicted Afr/Ap 26 Jun-28 Jun 007/008-007/008-005/005
VI. Geomagnetic Activity Probabilities 26 Jun to 28 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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