Viewing archive of Friday, 24 July 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 Jul 24 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 205 Issued at 2200Z on 24 Jul 2009IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity has been very low. No flares were
observed during the past 24 hours. The solar disk remains spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was quiet to unsettled. Solar wind speeds
observed from the ACE spacecraft are averaging around 550 km/s with
minor IMF Bz fluctuations (+/-2nT).
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominately quiet for the next three days (25-27
July). Isolated unsettled conditions are expected for 26 July due
to a recurrent high speed stream.
III. Event Probabilities 25 Jul to 27 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Jul 068 Predicted 25 Jul-27 Jul 069/070/070 90 Day Mean 24 Jul 069
V. Geomagnetic A Indices
Observed Afr/Ap 23 Jul 008/008 Estimated Afr/Ap 24 Jul 006/007 Predicted Afr/Ap 25 Jul-27 Jul 005/005-007/008-005/005
VI. Geomagnetic Activity Probabilities 25 Jul to 27 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 10% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 15% | 05% |
| Minor storm | 01% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
Latest news
Monday, 23 December 2024
M9.0 solar flare with earth-directed CME
Sunday, 8 December 2024
X2.2 solar flare, SDO outage
Thursday, 21 November 2024
Major far side eruption, S1 radiation storm
Latest forum messages
Season greetings from SpaceWeatherLive 7Ask your obscure/"stupid" space weather questions. 1302024/12/23 AR13932 M8.9 & M4.1 associated CMEs 34AR 13932 85A little bit about our hobby for the general public 10
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 | 2024/12/25 | M4.9 |
| 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 | 115.2 -37.3 |
| Last 30 days | 120.1 -38.2 |