Viewing archive of Sunday, 8 September 2002
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 2002 Sep 08 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 251 Issued at 2200Z on 08 Sep 2002IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z Solar activity was moderate. Region 105 (S07E66)
produced an M1/Sf flare at 08/0143 UTC. This sunspot group is still
near the east limb but appears to be a fairly large, elongated
F-type region. Other regions currently on the disk are relatively
small and magnetically simple. New Regions 106 (N28E50) and 107
(N11E70) were numbered. Region 107 generated a number of subflares
today, the largest being a C4/Sf at 08/1457 UTC.
IB. Solar Activity Forecast
Solar activity is expected to be
moderate. Region 105 is the most likely source of energetic flares.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
The geomagnetic field ranged from quiet to major storm levels. The
disturbance which began yesterday has ended. Activity has been at
quiet to unsettled levels since about 08/0600 UTC. The greater than
10 MeV proton event ended at 08/0145 UTC (start: 07/0440 UTC and 208
pfu peak: 07/1650 UTC).
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled. Activity levels may increase by
the end of the three-day forecast period in response to an extension
of the south polar coronal hole.
III. Event Probabilities 09 Sep to 11 Sep
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 08 Sep 192 Predicted 09 Sep-11 Sep 200/210/220 90 Day Mean 08 Sep 171
V. Geomagnetic A Indices
Observed Afr/Ap 07 Sep 024/045 Estimated Afr/Ap 08 Sep 014/030 Predicted Afr/Ap 09 Sep-11 Sep 010/012-008/008-012/015
VI. Geomagnetic Activity Probabilities 09 Sep to 11 Sep
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
Latest news
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Monday, 11 November 2024
Coronal hole faces Earth
Latest forum messages
Unexplained proton activity 4jsoc 61Filaments and prominences 594Changelog/Featurelog 162Power transmission for all of us. And why I believe we are better prepared than ever for major solar events 1
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 | 2024/12/08 | X2.2 |
| Last M-flare | 2024/12/21 | M1.9 |
| Last geomagnetic storm | 2024/12/17 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2024 | 152.5 -13.9 |
| December 2024 | 100.9 -51.6 |
| Last 30 days | 116.1 -38.9 |