Viewing archive of Wednesday, 20 June 2007
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 2007 Jun 20 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 171 Issued at 2200Z on 20 Jun 2007IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity was very low. The visible disk remains
spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low.
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic field was quiet. The greater than 2 MeV electron
flux at geosynchronous orbit reached high levels again today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to range from unsettled to minor storm levels on 21-22
June, in response to a recurrent coronal hole high speed stream.
Isolated major storm periods are possible at high latitudes.
Conditions diminish to unsettled on 23 June.
III. Event Probabilities 21 Jun to 23 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 20 Jun 066 Predicted 21 Jun-23 Jun 068/068/070 90 Day Mean 20 Jun 074
V. Geomagnetic A Indices
Observed Afr/Ap 19 Jun 005/007 Estimated Afr/Ap 20 Jun 006/010 Predicted Afr/Ap 21 Jun-23 Jun 015/020-010/015-008/010
VI. Geomagnetic Activity Probabilities 21 Jun to 23 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 25% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 10% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 30% | 20% |
| Minor storm | 25% | 20% | 15% |
| Major-severe storm | 15% | 10% | 05% |
All times in UTC
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| Last M-flare | 2024/12/23 | M8.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
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