Viewing archive of Sunday, 18 May 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 May 18 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 139 Issued at 2200Z on 18 May 2008IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was very low. Region 994 (S12W22)
increased in complexity briefly becoming a Cso Beta magnetic class.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low. There is a slight chance of a C-class flare, particularly
from Region 994.
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to range from unsettled to active levels over the next
three days, with a chance for minor storm levels at high latitudes
as a recurrent coronal hole high speed stream becomes geoeffective.
III. Event Probabilities 19 May to 21 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 18 May 072 Predicted 19 May-21 May 072/072/072 90 Day Mean 18 May 071
V. Geomagnetic A Indices
Observed Afr/Ap 17 May 001/002 Estimated Afr/Ap 18 May 005/005 Predicted Afr/Ap 19 May-21 May 010/012-015/030-010/015
VI. Geomagnetic Activity Probabilities 19 May to 21 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 20% |
| Minor storm | 10% | 15% | 10% |
| Major-severe storm | 01% | 09% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 45% | 30% |
| Minor storm | 15% | 25% | 15% |
| Major-severe storm | 01% | 10% | 05% |
Latest news
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Thursday, 22 February 2024
X6.3 solar flare
Latest forum messages
AR 3637, 3638, 3643 42Interesting four hour class 12Weird SOHO Noise? 11Growth of Cycle 25 405Unproven theories 322
More topics
Support 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!
