Viewing archive of Wednesday, 19 August 2009
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 2009 Aug 19 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 231 Issued at 2200Z on 19 Aug 2009IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity was very low. No flares were detected.
The visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
Geomagnetic field activity was at quiet to unsettled levels.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels, with isolated active
periods possible on day one (20 August). This activity is in
response to the continued effects from a recurrent coronal hole
high-speed stream (CH HSS). Activity is expected to decrease to
mostly quiet on days two and three (21 - 22 August).
III. Event Probabilities 20 Aug to 22 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Aug 067 Predicted 20 Aug-22 Aug 068/068/068 90 Day Mean 19 Aug 068
V. Geomagnetic A Indices
Observed Afr/Ap 18 Aug 002/004 Estimated Afr/Ap 19 Aug 010/012 Predicted Afr/Ap 20 Aug-22 Aug 007/007-005/005-005/005
VI. Geomagnetic Activity Probabilities 20 Aug to 22 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 10% | 05% |
| Minor storm | 05% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 05% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
Latest news
Saturday, 4 May 2024
Sunspot region 3663, X1 solar flare
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
Latest forum messages
AR3663 216Weakening of Earths magnetic field due to geomagnetic excursion 17Filaments and prominences 72CME Imagery isn't updating since May 3rd. 9AR3664 38
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 | 2024/05/06 | X4.4 |
| Last M-flare | 2024/05/06 | M1.5 |
| Last geomagnetic storm | 2024/05/02 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| Last 30 days | 156.6 +63.6 |