Viewing archive of Thursday, 18 June 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 Jun 18 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 169 Issued at 2200Z on 18 Jun 2009IA. Analysis of Solar Active Regions and Activity from 17-2100Z to 18-2100Z Solar activity was very low for the past 24 hours. The
only region on the disk, Region 1021 (S16W84), has decayed to
spotless plage.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low for the next three days (19-21 June).
IIA. Geophysical Activity Summary 17-2100Z to 18-2100Z
The geomagnetic field was quiet for the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to remain quiet for the next three days (19-21 June).
III. Event Probabilities 19 Jun to 21 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 18 Jun 068 Predicted 19 Jun-21 Jun 068/068/068 90 Day Mean 18 Jun 070
V. Geomagnetic A Indices
Observed Afr/Ap 17 Jun 001/003 Estimated Afr/Ap 18 Jun 002/002 Predicted Afr/Ap 19 Jun-21 Jun 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 19 Jun to 21 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Wednesday, 15 May 2024
More X-flares!
Tuesday, 14 May 2024
X8.7 solar flare
Monday, 13 May 2024
M6.6 solar flare with earth-directed CME
Latest forum messages
Unproven theories 454AR3685 26Dog bone asteroids 14Incoming Active Regions 357What makes AR3684 magnetically distinct from AR3685? 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 | 2024/05/15 | X2.9 |
| Last M-flare | 2024/05/16 | M1.0 |
| Last geomagnetic storm | 2024/05/16 | Kp6 (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| May 2024 | 156.6 +20.1 |
| Last 30 days | 177 +70.8 |