Viewing archive of Monday, 6 September 1999
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 1999 Sep 06 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 249 Issued at 2200Z on 06 SEP 1999IA. Analysis of Solar Active Regions and Activity from 05-2100Z to 06-2100Z SOLAR ACTIVITY HAS BEEN VERY LOW. TODAY'S LARGEST FLARE
WAS A B6/SF AT 1213UT FROM REGION 8682 (N17W41). THIS REGION APPEARS
TO BE SLOWLY DECAYING. REGION 8687 (N10W60) APPEARED TO BE GROWING
SLOWLY TODAY BUT WAS QUIET AND STABLE. A NEW REGION 8690 (N13E73)
ROTATED INTO VIEW TODAY AS A D-TYPE SUNSPOT GROUP.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
FOR THE NEXT THREE DAYS.
IIA. Geophysical Activity Summary 05-2100Z to 06-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET DURING THE PAST 24 HOURS. THE
ENERGETIC ELECTRONS AT GEOSYNCHRONOUS ALTITUDE ATTAINED HIGH FLUX
LEVELS TODAY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO QUIET FOR THE NEXT THREE DAYS.
III. Event Probabilities 07 SEP to 09 SEP
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 06 SEP 119 Predicted 07 SEP-09 SEP 115/112/112 90 Day Mean 06 SEP 167
V. Geomagnetic A Indices
OBSERVED AFR/AP 05 SEP 004/008 ESTIMATED AFR/AP 06 SEP 005/010 PREDICTED AFR/AP 07 SEP-09 SEP 010/012-005/012-005/010
VI. Geomagnetic Activity Probabilities 07 SEP to 09 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 10% |
| Minor storm | 10% | 10% | 05% |
| Major-severe storm | 05% | 05% | 05% |
Latest news
Monday, 22 April 2024
Lot's of sunspots! Big chance for major flare activity?
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Latest forum messages
What are these long and thin eruptions? 4IMF - BT strength 2AR 3637, 3638, 3643 89Unproven theories 341Space Weather Memes 338
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/25 | M1.3 |
| Last geomagnetic storm | 2024/04/19 | Kp7 (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |
| Last 30 days | 133.9 +26.6 |